The invention relates to the field of cooling towers, in particular to a water spraying and demisting filler unit. On the basis, the invention also relates to a cooling tower including a water spraying and demisting filler layer consisting of the water spraying and demisting filler units. The invention also relates to a demisting filler unit.

In the industries of petroleum, chemical industry and the like, circulating water cooling systems are widely used. The traditional open cooling tower utilizes water spraying filler to cool the circulating water. The circulating hot water from a process device enters a cooling tower spraying system, and is formed a spraying circulating hot water by passing a water spraying head, and the spraying circulating hot water enters the water spraying filler from top to bottom. The filler is generally made of PVC sheets, and water enters the filler to form a water film along the PVC sheets. The external cold dry air enters the filler from bottom to top, and the external cold dry air exchanges heat with the water film, and the water film is evaporated and cooled, and the air is heated and humidified to form hot humid air. A fan is arranged at the top of the cooling tower to discharge the hot humid air out of the tower, and the circulating hot water is cooled to form circulating cold water. The hot humid air from the upper part of the water spraying filler is discharged out of the tower via the cooling tower air duct. Due to the fact that the hot humid air discharged out of the tower has a high humidity and a high temperature, when the environmental temperature is low, the hot humid air is discharged out of the tower to be mixed with cold air, and due to cooling and condensation, a mist containing a plurality of tiny liquid droplets is formed.

Generally, most of cooling tower water-saving and demisting technologies are based on the solution in which a water-saving and demisting filler layer is added above a cooling tower water spraying filler, and the water-saving and demisting filler is used for heat exchange between hot humid air coming from the water spraying filler and external cold dry air, so that the purposes of water saving and demisting are achieved. The technology needs to increase the height of the tower, otherwise, there is no installation space for an additional layer of demisting filler. The technology is generally suitable for newly built towers, and the height of the tower is increased at the design timeline to allow the demisting filler layer to be installed on the top. For a large number of common water spraying cooling towers currently in use, the technology cannot be applied.

There is a filler unit and the cooling tower in the art, and in the vertical direction of the filler unit, there are formed an upper flow guiding part of an upper triangle with a topmost apex pointing to the upper part of the filler unit and an upper longitudinal flow guiding part communicated with the oblique edge of the inflow side of the upper triangle. In the vertical direction of the filler unit at the lower part of the filler unit, there are formed a lower flow guiding part which is formed into a lower triangle with the topmost apex pointing to the lower part of the filler unit and a lower longitudinal flow guiding part communicated with the oblique edge of the outflow side of the lower triangle. The longitudinal flow guiding parts are arranged on each main filler sheet, so that the filler unit is basically formed as a rectangular shape, and water can be uniformly guided into the functional parts of the filler unit, and the water in the filler unit can be uniformly discharged. By arranging the flaring structure, the filler unit ingeniously utilizes the non-inflow side space of the first main filler sheet and the second main filler sheet, and the partition sheets are deflected towards the filler sheets, and the flowing diameter of the first flow path and the second flow path corresponding to the lower longitudinal flow guiding part is increased, and the air resistance is reduced.

However, the above solution has many problems: 1. the partition plate is inserted between the two main filler sheets in the water spraying and demisting filler unit, and the partition plate can only be used as a heat exchange fin of cold and hot fluids, and the two sides of the surface of the main filler sheets are the same fluid and cannot participate in heat exchange, and only half of the area of the diaphragm in the filler participates in heat exchange when in the demisting operation mode, so that the water saving and demisting capability is reduced by half; 2. the first main filler sheet guides water sprayed from an inclined side edge serving as an inflow side inclined edge to the middle of the full width of the first main filler sheet at an upper flow guiding part; at the lower flow guiding part, the water flows out from the middle part of the approximate full width of the first main filler sheet to the other side serving as an outflow side inclined edge or the one side inclined edge, and the upper triangular area of the demisting module is a distribution structure, and the lower triangular area is a water drainage air inlet, and the upper and lower structures are aligned one by one, if the width of the demisting module is large, the water outflow of the demisting water outlet structure is uneven, if the width of the demisting module is small, the spraying heads above the demisting module need to be densely arranged, and the distance between spraying branch pipes of the existing cooling tower is generally about 800 mm-1500 mm, and the practicability is poor in practical use, in particular for large-scale industrial cooling towers; 3. the lower triangle of the demisting filler unit is used as both an air inlet and a water outlet, and gas-liquid entrainment is easily generated at this position, and the cooling tower using the module can only be provided with a large number of partition plates for dividing air inlet air duct and supporting the module at the lower part of the module, and the partition plates are densely distributed at the lower part of the whole cooling tower, and the cost is high, and the maintenance is difficult.

It is also common in the art to provide a demisting device for demisting in a cooling tower, the demisting device comprising: a first flow path and a second flow path which are stacked and exchange heat for the first airflow and the second air flow; a first inlet for introducing a first airflow flowing from one side of the demisting device in the width direction into the first flow path; a second inlet for introducing a second airflow from the bottom of the demisting device into a second flow path; a first outflow port for discharging the first airflow flowing out of the first flow path to a position above the demisting device; and a second outflow port for discharging the second airflow flowing out of the second flow path to a position above the demisting device, wherein the demisting device can play a role in water saving and demisting.

In a common cooling tower and a demisting device comprising a demisting filler unit, there exist the following problems: 1. the length of the heat exchange device in the environment-friendly demisting device is close to half of the height of the demisting tower, and cold air channels in the heat exchange device are irregular, and the air resistance and pressure drop are large, and cold air is difficult to enter the tower in a large amount from the outside of the tower via the demisting heat exchange device, and the demisting effect is poor; 2. in this demisting heat exchange device, cold air inlet channel, cold channel and hot channel are perpendicular to cooling tower water spraying filler air inlet lateral wall and close to the lateral wall, and air dampers are arranged in the middle which are switchable, when in non-demisting operating mode in summer, the hot humid air that comes from the water spraying filler in the tower distributes very unevenly in the tower, and then seriously influences the amount of air distribution in the water spraying filler, influences the cooling effect. 3. In summer, the resistance of the demisting heat exchange device in the demisting tower is large, and the total pressure is increased, and the power consumption for cooling is increased.

The invention aims to overcome the problem that gas-liquid entrainment is easy to occur at the lower part of a water spraying and demisting filler layer in the prior art, and provides a water spraying and demisting filler unit which is suitable for being applied to a water spraying and demisting cooling tower and effectively avoids the gas-liquid entrainment by the air and liquid being separated and flowing along different paths.

In order to achieve the above object, a first aspect of the invention provides a water spraying and demisting filler unit, wherein the water spraying and demisting filler unit comprises a plurality of main filler sheets which are stacked, and a plurality of fluid passages distributed in a stacking direction are formed between the adjacent main filler sheets, and each of the fluid passages has a water inlet and air outlet port at an upper end and an air inlet port at a lower end respectively, and each of the main filler sheets is formed with a serration area including a plurality of serration units at portions adjacent to the air inlet ports respectively, and the adjacent main filler sheets are spaced apart from each other at bottom tips of the serration units to form water outlets which open downwards and discharges the spraying water, and the adjacent main filler sheets are spaced apart from each other at least one side edge of the serration unit to form the air inlets for introducing the cold water.

Preferably, two side edges of each of the serration units are obliquely extended with respect to a vertical direction such that the serration units are formed in a tapered shape tapered downward, and adjacent main filler sheets are spaced apart from each other at both the side edges of the serration units.

Preferably, the maximum width of the serration units is not more than 500 mm, preferably not more than 250 mm.

Preferably, the water spraying and demisting filler unit further comprises a plurality of water collecting tanks arranged below the main filler sheets, and each water collecting tank is respectively arranged opposite to the water outlet so as to be able to receive the spraying water discharged by the water outlet.

Preferably, supporting drain bars are arranged in the water collecting tank, and the main filler sheets are installed such that the bottom tip of the serration unit is supported on the supporting drain bar, and drain openings are formed at the bottom of the water collecting tank.

Preferably, the bottom tip of the serration unit is formed in a rectangular shape, and the water collecting tank has tank sidewalls extending upward to both sides of the bottom tip.

Preferably, the main filler sheets have evaporation and heat exchange zones located at the upper sides of the serration areas and flow guiding areas located at the upper sides of the evaporation and heat exchange zones, and the top edges of adjacent main filler sheets are in sealing contact in at least a partial width section of the main filler sheets and form sealing surfaces alternately distributed with the water inlet and air outlet ports in the stacking direction.

Preferably, the flow guiding zones are formed in an upward tapered isosceles triangle shape, and the waists of adjacent main filler sheets on both sides of the topmost apex of the flow guiding zones are sealingly connected alternately.

Preferably, the flow guiding zones are formed to have a V shaped recess at a middle portion of the top edge, and adjacent main filler sheets are sealingly connected at alternate in the V shaped recess.

Preferably, the flow guiding areas are formed with a plurality of sub flow guiding areas which are tapered upwards and have an isosceles triangle shape and distributed along the width direction of the main filler sheets, and the waists of the adjacent main filler sheets on both sides of the topmost apex of the sub flow guiding areas are sealingly connected alternately.

Preferably, flow guiding spacers for guiding the distribution of the spraying water in the whole width area of the main filler sheets are arranged between the flow guiding areas of the adjacent main filler sheets.

A second aspect of the invention provides a cooling tower, wherein the cooling tower comprises a tower body and a water collector, a water routing system and a water spraying and demisting filler layer arranged in the tower body from top to bottom, wherein the water spraying and demisting filler layer comprises a plurality of groups of water spraying and demisting filler units which are connected with each other at the sides thereof, and the tower body is formed with cooling tower air inlets at the lower side of the water spraying and demisting filler layer.

Preferably, the flow guiding areas are formed in the shape of isosceles triangles tapering upwards, and the waists of adjacent main filler sheets on both sides of the topmost apex of the flow guiding areas are alternately sealed to each other, and inside the tower body, there are provided water barrier plates abutting against the topmost apex of the flow guiding areas, and wherein the water routing system comprises water routing main pipes, water routing branch pipes connected to the water routing main pipes respectively, and spraying heads which are mounted at the free ends of the water routing branch pipes and located in the space between the adjacent water barrier plates.

Preferably, air dampers are provided in the tower body above the spraying heads, and the air dampers are switchable between an open position in which a space between adjacent water barrier plates communicates with an overhead space and a closed position in which the space between adjacent water barrier plates is blocked from an overhead space.

Preferably, the air dampers above the spraying heads which are spraying are in a horizontal closed position, and the air dampers above the spraying heads which are not spraying are in an open position.

Preferably, at least some of the water routing branch pipes spray the spraying water via the spraying heads onto the flow guiding areas of two adjacent water spraying and demisting filler units, and the spraying water further falls onto water inlet and air inlet ports of the flow guiding parts on the side surfaces of the triangular flow guiding parts at the top parts of the water spraying and demisting filler units, and enters the flow paths connected with the water inlet and air inlet ports of the flow guiding parts..

Preferably, the flow guiding areas are formed with a V shaped recess at a middle portion of the top side, and adjacent main filler sheets are sealingly connected at the V shaped recess at alternate, and the water routing system comprises water routing main pipes, high-level water routing branch pipes and low-level water routing branch pipes connected to the water routing main pipes respectively, and spraying heads mounted at free ends of the high-level water routing branch pipes and low-level water routing branch pipes, wherein a water spraying area of the spraying heads mounted at the free ends of the low-level water routing branch pipes is located within the V shaped recess.

Preferably, when the cooling tower operates in a demisting operation mode, a high-level water routing main pipe is not provided with water, and a low-level water routing main pipe is provided with water, and the low-level water routing branch pipes connected to the low-level water routing main pipe distribute the spraying water into the V shaped recess via the spraying heads.

Preferably, when the cooling tower operates in a water spraying cooling operation mode, the high-level water routing main pipe is provided with water, and the low-level water routing main pipe is not provided with water, and the high-level water routing branch pipes connected to the high-level water routing main pipe distribute the spraying water to the whole area of the water inlet and air outlet port via the spraying heads.

Preferably, the flow guiding area is formed with a plurality of sub flow guiding areas in an isosceles triangle shape tapering upward and distributed along the width direction of the main filler sheets, and the waists of adjacent main filler sheets located at two sides of a topmost apex of the sub flow guiding areas are alternately and sealingly connected, and the flow channel includes a first flow path and a second flow path, and the flow guiding area controllably guides the spraying water into the first flow path and the second flow path via the water inlet and air outlet port.

Preferably, the flow guiding areas are formed to have a V shaped recess at a middle portion of a top edge, and adjacent main filler sheets are sealingly connected at the V shaped recess at alternate, and the fluid passage includes a first flow path and a second flow path, wherein when spraying water falls on the V shaped recess and both sides thereof, the spraying water simultaneously enters the first flow path and the second flow path, wherein when the circulating hot water sprayed from above falls only on the V shaped recess, the spraying water can enter only the first flow path or the second flow path.

By means of the above solutions, the water spraying and demisting filler layer according to the invention is formed with a serration area including a plurality of serration units at portions adjacent to the air inlet ports of the main filler sheets, so as to stop cold air from entering the water spraying and demisting filler unit from the bottom tip end of the serration unit by means of the water collecting tank, and the bottom tip end forms a water outlet which is only used for discharging spraying water. The cooling air mainly enters the flow channels within the water spraying and demisting filler unit via the air inlets formed at the sides of the serration units. As a result, the discharged spraying water and the incoming cooling air follow different flow paths in the lower portion of the water spraying and demisting filler layer, thereby effectively preventing gas-liquid entrainment. At the same time, lower partition plates and similar structures can be omitted, thereby the costs are reduced.

In contrast to the art, the water spraying and demisting filler unit and the cooling tower according to the invention have the following beneficial effects:

1. 1. The main filler sheets in the water spraying and demisting filler unit can be used for both water spraying cooling and partition wall heat exchange, and an intermediate partition plate is not needed. All the main filler sheets in the water spraying and demisting filler unit can be used for heat exchange in the demisting operation mode, and the heat exchange area is doubled compared with that of the common water spraying and demisting filler, and the water saving and demisting capability is improved.
2. 2. The water spraying and demisting filler unit directly forms a flow channel between the main filler sheets without intermediate spacers, so that the resistance is smaller.
3. 3. The unique serration flow accumulating structure and the operating principle of the invention allow cold air to enter through the serration area at the lower part of the water spraying and demisting filler unit, and can directly replace common water spraying filler, and does not need to design dense partition plates at the lower part, and thus the water spraying and demisting filler unit has novelty, extremely strong practicability, low cost and easy reconstruction and maintenance.
4. 4. The cooling tower according to the preferred embodiment of the invention not only can operate in a water spraying operation mode and a demisting operation mode, but also can realize closed cooling operation, and the water saving rate is close to 100 percent.
5. 5. In the cooling tower of the preferred embodiment of the invention, the upper part of the water spraying and demisting filler layer does not need to be provided with water barrier plates, so that the reconstruction is simpler to be performed.

Another object of the invention is to provide a demisting filler unit, which can greatly reduce the resistance of the cold air channel, and facilitate the improvement of the demisting effect by increasing the air volume and flow rate of the cold air, in order to overcome the problems of large resistance pressure drop and poor demisting effect when the cold air flows through the demisting filler unit in the art.

In order to achieve the above object, a third aspect of the invention provides a demisting filler unit, wherein the demisting filler unit comprises a plurality of stacked heat exchange fins each including a bottom edge, opposite side edges, and a top edge, and the bottom edge and opposite side edges of adjacent heat exchange fins are sealed and connected with each other at alternate to form a cold dry airflow channel and a hot humid airflow channel which are alternately distributed along the stacking direction, and the cold dry airflow channel is provided with a pair of cold channel air inlets opposite to each other at the location of the side edges and a cold channel air outlet which is positioned at the location of the top edges, and the hot humid airflow channel is provided with a hot channel air inlet located at the bottom edges and a hot channel air outlet which is located at the top edge of the heat exchange fin and is alternately distributed with the cold channel air outlet along the stacking direction.

Preferably, the bottom edge of each heat exchange fin extends horizontally and the opposite side edge extends vertically, so that the cold channel air inlets of each cold dry airflow channel are horizontally opened and horizontally face each other.

Preferably, the top edge of each plate extends horizontally or is recessed toward the bottom edge, and the cold channel air outlet and the hot channel air outlet each extend over the entire length of the top edge, or the top edges of adjacent fins forming the cold dry airflow channel sealingly connect with each other at the position adjacent the side edge such that the cold channel air outlets extend in a middle portion of the top edge.

Preferably, the heat exchange fin is formed with a water deflecting and collecting structure at a position adjacent to the hot channel air inlet, and the water deflecting and collecting structure is arranged to at least partly alter a flow direction of an airflow in the hot humid airflow channel which comes from the hot channel air inlet to capture at least a portion of moisture entrained in the airflow. The cross section of the water deflecting and collecting structure may be triangular, rectangular, semicircular or trapezoidal

Preferably, the heat exchange fins are formed with hot channel flow guiding strips which protrude toward the hot humid airflow channel and extend in a vertical direction and/or a cold channel flow guiding strips which protrude toward the cold dry airflow channel and extend in a horizontal direction, and the protruding heights of the hot channel flow guiding strips and/or the cold channel flow guiding strips are less than the thickness of the respective hot humid airflow channel and cold dry airflow channel, preferably less than 1/4 of the thickness of the respective hot humid airflow channel and cold dry airflow channel.

Preferably, the heat exchange fin is formed with columnar supports which extend within the cold dry airflow channel and/or the hot humid airflow channel and abut adjacent fin.

A fourth aspect of the invention provides a demisting cooling tower, which comprises a tower body, a demisting filler layer, a spraying unit and a water spraying filler layer, wherein the demisting filler layer, the spraying unit and the water spraying filler layer are arranged in the tower body from top to bottom, and the demisting filler layer comprises a plurality of groups of demisting filler units, and the tower body is provided with a cooling tower air inlet positioned on the lower side of the water spraying filler layer and a plurality of cold air inlet channels respectively communicated with the cold channel air inlet, and the hot humid air raised from the water spraying filler layer can flow to the hot channel air inlet along with the cold air introduced from the cooling tower air inlet. The number of the demisting filler units arranged in the demisting cooling tower is more than or equal to 2 groups. Preferably, the number of the demisting filler units placed in the demisting cooling tower is more than or equal to 4 groups.

Preferably, a plurality of groups of the demisting filler units are horizontally arranged in the tower body at alternate, and the cold air inlet channels are respectively positioned in the intervals between the adjacent demisting filler units and are simultaneously communicated with the cold passage air inlets of the adjacent demisting filler units. Optionally, a plurality of groups of the demisting filler units can be connected with each other at the side edges in the tower body, and the cold air inlets of the heat exchange fins are arranged on two side edges of the trapezoid bottom by arranging the heat exchange fins to have the trapezoid bottom protruding downwards, so that cold air introduced by a pair of cold air inlets opposite to each other can be utilized simultaneously, and the arrangement density of the demisting filler units in the tower body is increased.

Preferably, the cold air inlet channel (preferably, the upper and lower sides) is respectively provided with air dampers capable of being switched between an open position and a closed position, and when the air damper is switched to the closed position, the hot humid air raised from the water spraying filler layer can only flow to a position above the demisting filler layer via the hot humid air channel; when the air damper is switched to the opening position, the hot humid air raised from the water spraying filler layer can simultaneously flow to a position above the demisting filler layer via the hot humid air channel and the cold air inlet channel.

Preferably, a water collector is arranged in the cold air inlet channel, and the hot humid air which flows through the cold air inlet channel and is raised from the water spraying filler layer flows through the water collector to a position above of the demisting filler layer.

By means of the technical solutions as above, the demisting filler unit according to the invention is provided with a pair of cold channel air inlets for introducing cold air, and the introduced cold air enters the demisting filler unit in opposite directions via the cold channel air inlets and turns there and flows to the cold channel air outlets of the demisting filler unit. Therefore, the flowing length of the cold air in the cold dry airflow channel is obviously shortened, and the air resistance of the cold air channel can be effectively reduced, and the air volume and the flow rate of the cold air can be increased, the heat exchange coefficient is improved, and the demisting effect is improved.

Moreover, in contrast to the art, the demisting filler unit and the demisting cooling tower according to the invention have the following beneficial effects:

1. 1. Air dampers are arranged on the upper and lower sides of the cold air inlet channel of the demisting cooling tower, and the air dampers are all in vertical state (open position) in thermal operation mode (non-demisting operation mode). At this time, the hot humid air that flows upwards from the water spraying filler in the tower can pass cold air inlet channel and demisting filler unit simultaneously, and the demisting filler unit and cold air inlet channel are arranged evenly in the tower. The hot humid airflow will not be disturbed much when passing through the water spraying filler in the tower, and whole tower cooling effect is better.
2. 2. The cold air inlet channels are arranged at alternate in the demisting cooling tower, and the cold air inlet channels can greatly reduce the pressure drop in the tower in a thermal operation mode, for example, when the tower is operated in summer, because the resistance increased by adding a demisting layer is reduced by more than 50 percent.
3. 3. In the demisting filler unit according to the invention, the lower part of the heat exchange fin can be provided with the water deflecting and collecting structure, so that the overall structural strength of the demisting filler unit can be greatly improved; on the other hand, when the hot humid air passes through the water deflecting and collecting structure, the entrained micro droplets impact on the water deflecting and collecting structure, and the micro droplets are deflectd and captured under the action of inertia force and flow back into the tower by gravity, so that the water collecting and demisting effects of the water collecting and demisting filler are superior to those of a common tower water collector.
4. 4. In the demisting cooling tower according to the invention, the demisting filler unit has an great water collecting function, and meanwhile, the special double-cooling-channel air inlets are arranged on two sides of the demisting filler unit, so that the height of the whole tower is increased by only 1-2 meters compared with that of the conventional common tower technology, and the demisting effect is obviously improved.
5. 5. In the demisting cooling tower according to the invention, cold air and hot air after heat exchange leave from the top of the demisting filler layer, and can be quickly and uniformly mixed after leaving the demisting filler layer. No additional mixing space are needed at the upper part of the demisting cooling tower, and the height of the tower body can be further reduced.
6. 6. The demisting filler unit according to the invention can be provided with a horizontal bottom, so that the demisting filler layer can be conveniently and horizontally placed, the installation is easy, and the cost is low.
7. 7. The cold air inlet channel of the demisting cooling tower is provided with a rotary baffle of the air damper at the upper side and the lower side. In summer, the rotary baffle of the air damper is positioned at the vertical position, and the louver is closed, and the hot humid air is discharged out of the cooling tower by means of the hot humid air channel and the cold dry air channel of the demisting filler unit. In winter, the rotary baffle of the air damper is positioned at a horizontal position, and the louver is opened, and cold dry air enters a cold dry airflow channel of the demisting filler unit by means of the cold air inlet channel, and hot humid air enters a hot humid airflow channel of the demisting filler unit. The demisting cooling tower comprises two modes, i.e., a water collecting and demisting operation mode and a thermal operation mode. The demisting cooling tower can meet the requirements of different seasons respectively, and is flexible in operation.

• FIG. 1 is a schematic front view of a main filler sheet of a water spraying and demisting filler unit according to a first preferred embodiment of the invention;
• FIG. 2 is a perspective view of a water spraying and demisting filler unit composed of the main filler sheets of FIG. 1;
• FIG. 3 is a perspective view of the water spraying and demisting filler unit of FIG. 2 from another perspective;
• FIG. 4 is a schematic structural view of a main filler sheet of a water spraying and demisting filler unit according to a second preferred embodiment of the invention;
• FIG. 5 is a perspective view of a water spraying and demisting filler unit composed of the main filler sheets of FIG. 4;
• FIG. 6 is a perspective view of the water spraying and demisting filler unit of FIG. 5 from another perspective;
• FIG. 7 is a perspective view of the water spraying and demisting filler unit of FIG. 5 from yet another perspective;
• FIG. 8 is a schematic view of a flow path and a force analysis diagram of a serration flow accumulating part of a water spraying and demisting filler unit of the invention;
• FIG. 9 is a perspective view of a water spraying and demisting filler unit according to a third preferred embodiment of the invention;
• FIG. 10 is a perspective view of a water collecting tank in the water spraying and demisting filler unit according to the preferred embodiment of the invention;
• FIG. 11 is a perspective view of the water spraying and demisting filler unit of the first preferred embodiment when a water collecting tank is added;
• FIG. 12 is a perspective view of the water spraying and demisting filler unit of the second preferred embodiment when a water collecting tank is added;
• FIG. 13 is a schematic diagram of a cooling tower provided with the water spraying and demisting filler unit of the first preferred embodiment as described above, wherein the cooling tower operates in an open cooling mode;
• FIG. 14 is a schematic illustration of the cooling tower of FIG. 13 when operating in a demisting operation mode;
• FIG. 15 is a schematic illustration of the cooling tower of FIG. 13 when operating in a closed cooling mode;
• FIG. 16 is a schematic diagram of a cooling tower provided with the water spraying and demisting filler unit of the second preferred embodiment as described above, wherein the cooling tower operates in the water spraying cooling mode;
• FIG. 17 is a schematic illustration of the cooling tower of FIG. 16 operating in a demisting operation mode;
• FIG. 18 is a diagram showing the relative positions of the lower spraying head and the water spraying and demisting filler unit in the cooling tower shown in FIG. 16;
• FIG. 19 is a perspective view of a water spraying and demisting filler unit according to a fourth preferred embodiment of the invention;
• FIG. 20 is a partial enlarged view of a flow guiding area of the water spraying and demisting filler unit in FIG. 19;
• FIG. 21 is an enlarged view of a portion of a serration area of the water spraying and demisting filler unit of FIG. 19;
• FIG. 22 is an enlarged view of a flow guiding spacer of the water spraying and demisting filler unit of FIG. 19;
• FIG. 23 is a perspective view of a water spraying and demisting filler unit according to a fifth preferred embodiment of the invention;
• FIG. 24 is a partial enlarged view of a flow guiding area of the water spraying and demisting filler unit of FIG. 23;
• FIG. 25 is a schematic view of a demisting filler unit according to a preferred embodiment of the invention;
• FIG. 26 is a schematic view of the demisting filler unit of FIG. 25 from another perspective;
• FIG. 27 is a schematic sectional view showing a water deflecting and collecting structure in the demisting filler unit of FIG. 25;
• FIG. 28 is a schematic flow diagram showing the flow of cold air through the cold dry airflow path;
• FIG. 29 is a schematic flow diagram illustrating the flow of hot humid air through the hot humid airflow path;
• FIG. 30 is a schematic view of a demisting cooling tower according to a preferred embodiment of the invention operating in a demisting operation mode;
• FIG. 31 is a schematic illustration of the demisting cooling tower of FIG. 30 operating in a non-demisting operation mode;
• FIG. 32 is a schematic view of one variation embodiment of the demisting filler unit according to the invention;
• FIG. 33 is a schematic view of another variation embodiment of the demisting filler unit according to the invention;
• FIG. 34 is a schematic view of a demisting filler unit according to another preferred embodiment of the invention;
• FIG. 35 is an enlarged fragmentary view of an upper portion of the demisting filler unit of FIG. 34;
• FIG. 36 is an enlarged fragmentary view of a lower portion of the demisting filler unit of FIG. 34; and
• FIG. 37 is a partial detail view of the demisting filler unit of FIG. 34.

• 1001-main filler sheet; 1002-flow guiding area; 1003-evaporation and heat exchange zone; 1004-serration area; 1005-serration unit; 1006-slanted edge; 1007-vertical edge;
• 1101-water spraying and demisting filler unit; 1102-upper flow guiding part; 1103-serration flow collecting part; 1104-vertical sealing surface; 1105-water inlet and air outlet port; 1106-inclined sealing surface; 1107-serration flow accumulating part; 1108-air inlet; 1109-water outlet;
• 2001-main filler sheet; 2002-serration area; 2003-horizontal edge; a 2004-V shaped recess; 2005-vertical edge; 2006-evaporation and heat exchange zone; 2007-serration unit; 2008-rectangular flow accumulating port;
• 2101-water spraying and demisting filler unit; 2102-V shaped sealing surface; 2103-V shaped channel; 2104-V shaped flow guiding and water spraying area; 2105-vertical sealing surface; 2106-serration flow collecting part; 2107-water inlet and air outlet port; 2108-air inlet; 2109-water outlet;
• 3001-serration unit; 3002 cold air; 3003-liquid flow; 3004-blowing force; 3005-gravity; 3006-resultant force;
• 4001-water outlet; 4002-air inlet; 4003-inclined sealing surface;
• 5004-water collecting tank; 5001-tank sidewall; 5002-supporting drain bar; 5003-drain opening;
• 6001-serration unit; 6002-water collecting tank;
• 7001-air inlet of cooling tower; 7002-spraying head; 7003-water routing branch pipe; 7004-air damper; 7005-water routing main pipe; 7006-fan; 7007-air duct; 7008-water collector; 7009-water barrier plate; 7010-V shaped space; 7011-water spraying and demisting filler layer;
• 8001-air inlet of cooling tower; 8002-low-level water routing branch pipe; 8003-low-level water routing main pipe; 8004-high-level water routing main pipe; 8005-water collector; 8006-air duct; 8007-fan; 8008-high-level water routing branch pipe; 8009-high-level spraying head; 8010-low-level spraying head; 8011-water sprinkling and demisting filler layer;
• 9001-water spraying and demisting filler unit; 9002-water inlet and an air outlet port; 9003-flow guiding area; 9004-slope; 9005-vertical sealing surface; 9006-serration area; 9007-flow guiding spacer; 9010-oblique sealing surface; 9011-air inlet; 9012-water outlet; 9013-flow guiding trough; 9014-internal flow guiding portion; 9015-inlet flow guiding part;
• 9101-water spraying and demisting filler unit; 9102-V shaped channel; 9103-V shaped flow guiding and water spraying area; 9104-slope; 9105-serration area; 9106-V shaped sealing surface;
• 1001' -heat exchange fin; 1002' -water deflecting and collecting structure; 1003' -cold channel air inlet; 1004' -vertical edge sealing surface; 1005' -vertical sealing surface; 1006' -hot channel air outlet; 1007' -cold channel air outlet; 1008' -horizontal edge sealing surface; 1009' -hot channel air inlet; 1010' -horizontal sealing surface; 1011' -cold dry airflow channel; 1012' -hot humid airflow channel; 1013' -bottom edge; 1014' -top edge; 1015' -cold dry air; 1016' -side edge; 1017' -hot humid air;
• 2001' -demisting filler unit; 2002' -cooling tower air inlet; 2003' -water spraying filler layer; 2004' -spraying unit; 2005' -tower body; 2006' -water collector; 2007' -damper; 2008' -air duct; 2009' -fan; 2010' -demisting filler layer; 2011' -louver; 2012' -cold air inlet channel;
• 3001' -heat exchange fin; 3002' -horizontal sealing surface; 3003' - horizontal edge sealing surface; 3004' -hot channel air outlet; 3005' -cold channel air outlet; 3006' -cold channel air inlet; 3007' -vertical edge sealing surface; 3008' -vertical sealing surface; 3009' -water deflecting and collecting structure;
• 4001' -heat exchange fin; 4002' -horizontal sealing surface; 4003' - horizontal edge sealing surface; 4004' -hot channel air outlet; 4005' -cold channel air outlet; 4006' -cold channel air inlet; 4007' -vertical edge sealing surface; 4008' -vertical sealing surface; 4009' -water deflecting and collecting structure;
• 5001' -heat exchange fin; 5002' -cold channel air inlet; 5003' -water deflecting and collecting structure; 5004' -columnar support; 5005' -hot channel flow guiding strip; 5006' -cold channel air outlet; 5007' -hot channel air outlet; 5008' -turbulence bar; 5009' -cold channel flow guiding strip; 5010' -hot channel air inlet; 5011' -vertical edge sealing surface; 5012' - vertical sealing surface.

The detailed description of the invention will be illustrated in detail with reference to the drawings. It should be understood that the specific embodiments described herein are only for illustrating and explaining the present invention and are not intended to limit the scope of the present invention.

In the description of the invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top", "bottom", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships as shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed", "connected", "mounted" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; or may be connected directly or indirectly through intervening elements, or two elements may be interconnected between them. The specific meanings of the above terms in the invention can be understood by those of ordinary skill in the art as appropriate. In this context, the term "louver" refers to a component with slats or blades that can be opened or closed; in a broader sense, it may also include structures such as grilles that have opening and closing functions. The term "serration" or "serration unit" or the like refers to a generally serration or sawtooth shape, i.e. a shape having at least two serration or sawtooth shapes adjacent to each other, i.e. tapering towards the tip.

FIGS. 1 to 24 provide a plurality of different embodiments of the water spraying and demisting filler unit and the cooling tower provided with the same. The water spraying and demisting filler unit comprises a plurality of main filler sheets which are stacked, and a plurality of flow channels are formed which are distributed along the stacking direction and are respectively positioned between the adjacent main filler sheets, and each flow channel is respectively provided with a water inlet and air outlet port at the upper end and an air inlet at the lower end. Each main filler sheet is respectively formed as a serration area comprising a plurality of serration units at the portion thereof adjacent to the air inlet. The adjacent main filler sheets are respectively separated from each other at the bottom tip end and at least one side edge of the serration unit, so that a water outlet which is opened downwards for discharging spraying water is formed by the bottom tip end, and the air inlet is formed at the side edge.

Therefore, the water spraying and demisting filler unit according to the invention is convenient for stopping cold air from entering the water spraying and demisting filler unit from the bottom tip end of the serration unit by means of the water collecting tank, and the bottom tip end forms a water outlet which is only used for discharging spraying water. The cooling air mainly enters the flow channels within the water spraying and demisting filler unit via the air inlets formed at the sides of the serration units. As a result, the discharged spraying water and the incoming cooling air follow different flow paths in the lower portion of the water spraying and demisting filler layer, thereby effectively preventing gas-liquid entrainment. At the same time, lower partition plates and similar structures can be omitted, thereby the costs are reduced.

The cooling tower according to the invention comprises a tower body, and a water collector, a water routing system and a water spraying and demisting filler layer which are arranged in the tower body from top to bottom, wherein the water spraying and demisting filler layer comprises a plurality of groups of water spraying and demisting filler units which are connected to each other on the sides thereof, and the tower body is provided with a cooling tower air inlet positioned on the lower side of the water spraying and demisting filler layer. This cooling tower can be operated under multiple operating modes according to actual need, and need not to set up dense partition plates in the lower part of water spraying and demisting filler layer, has a higher practicality, and is convenient for retrofit and maintenance. In a preferred embodiment, the cooling tower can realize closed cooling operation, and the water saving rate is close to 100 percent, or a water barrier plate at the upper part of the water spraying and demisting filler layer can be omitted, and the retrofit and the implementation are simpler.

Various embodiments of the invention are described below with reference to the accompanying drawings. It is to be understood that these embodiments are merely illustrative and that technical features in different embodiments may be interchanged to form other further embodiments within the scope of the invention without departing from the technical principles thereof.

This embodiment provides a preferable structure of the water spraying and demisting filler unit.

As shown in FIGS. 1 to 3, a water spraying and demisting filler unit 1101 according to a first preferred embodiment of the invention has a plurality of main filler sheets 1001, wherein a flow guiding area 1002 is disposed at an upper portion of each main filler sheet 1001, a serration area 1004 is disposed at a lower portion thereof, and a rectangular evaporation and heat exchange zone 1003 is disposed at a middle portion thereof. The serration area 1004 at the lower part of the main filler sheet 1001 is composed of a plurality of flat-bottom serration units 1005. The upper parts of the serration units 1005 are inverted trapezoids with short sides downward, and the bottoms of the serration units 1005 are rectangular rectangular flow accumulating ports, and the short sides of the bottoms of the inverted trapezoids are connected with the rectangular flow accumulating ports.

The water spraying and demisting filler unit 1101 is formed by alternately stacking a plurality of main filler sheets 1001, and flow channels are formed between adjacent main filler sheets 1001, which flow channels are referred to as a first flow path and a second flow path respectively. An upper flow guiding part 1102 is formed at the upper part of the water spraying and demisting filler unit 1101: in the stacking direction of the main filler sheets, the flow guiding areas 1002 of the main filler sheets 1001 are alternately stacked in the vertical direction of the water spraying and demisting filler unit 1101 to form the upper flow guiding part 1102. A serration flow collecting part 1103 is formed at the lower part of the water spraying and demisting filler unit 1101: in the stacking direction of the main filler sheets, serration areas 1004 at the lower parts of the main filler sheets are alternately stacked in the vertical direction of the water spraying and demisting filler unit 1101 to form a serration flow collecting part 1103 at the lower part. The serration flow collecting part 1103 is formed of a plurality of serration flow accumulating parts 1107, and the serration flow accumulating parts 1107 are formed of a plurality of serration units 1005 of stacked main filler sheets. At the lower part of the serration flow accumulating part 1107, a rectangular flow accumulating port at the bottom of the serration unit 1005 at the lower part of the main filler sheet forms a water outlet 1109, and all the water outlets 1109 open downward and have the same opening direction. The number of the serration flow accumulating parts 1107 is twice or more than the number of the upper flow guiding parts 1102.

The upper flow guiding part 1102 is mainly responsible for controllably guiding the circulating hot water which is sprayed from above the water spraying and demisting filler unit 1101 into the first flow path and the second flow path. When there is water in the first flow path and there is no water the second flow path, external cold air respectively enters the first flow path and the second flow path under the driving of the fan, and the circulating hot water in the first flow path contacts with cold air in the evaporation and heat exchange zone 1003, and evaporation and heat dissipation are carried out, and the circulating hot water is cooled, and the cold air in the first flow path is changed into saturated hot humid air. The cold air flowing into the second flow path upwards from the serration flow collecting part 1103 below the water spraying and demisting filler unit 1101 exchanges heat with the circulating hot water in the first flow path via the partition walls of the main filler sheets when passing through the evaporation and heat exchange zone 1003, becomes hot dry air, and flows upwards out of the upper flow guiding part 1102. Saturated hot humid air and hot dry air flowing upwards from the upper flow guiding part 1102 of the water spraying and demisting filler unit 1101 are mixed and changed into unsaturated air which is discharged out of the tower, so that water saving and demisting are achieved. When the first flow path and the second flow path are completely filled with water, the water spraying and demisting filler unit is equivalent to a common water spraying filler.

The flow guiding areas 1002 arranged at the upper parts of the main filler sheets 1001 can be triangular flow guiding areas 1002 with topmost apexs upward, and the flow guiding areas 1008 of the alternately stacked main filler sheets are stacked to form a triangular upper flow guiding part 1102. An inclined sealing surface 1106 is arranged between the oblique edges on the same side of the flow guiding areas 1002 of the main filler sheets which are alternately stacked in the water spraying and demisting filler unit 1101, and an opening is formed between the oblique edges on the other side of the flow guiding areas 1002 of the main filler sheets which are alternately stacked, and the opening forms a water inlet and air outlet port 1105. Along the stacking direction of the main filler sheets, the inclined sealing surface 1106 and the water inlet and air outlet port 1105 are alternately distributed on the inclined surfaces of the upper flow guiding part 1102 on both sides.

When the circulating hot water sprayed from the upper part of the water spraying and demisting filler unit falls on the inclined surfaces at one side of the upper flow guiding part 1102, the first flow path and the second flow path which are connected with the inclined surfaces at one side of the upper flow guiding part are sealed at alternate, thus the circulating hot water can only enter the connected flow paths from the unsealed opening. When the control is not carried out so that water is sprayed to one side of the inclined surfaces of the two sides of the upper flow guiding part and water is not sprayed to the other side, water may exist or not exist in the first flow path and the second flow path at alternate.

One or more flow guiding spacers can be arranged between the flow guiding areas of the main filler sheets. Flow guiding troughs are formed in the flow guiding spacer, and the flow guiding troughs uniformly guide water to an evaporation and heat exchange area of the main filler sheets.

The serration flow accumulating part 1107 is formed by alternately stacking serration units 1005 at the lower portion of the main filler sheets. Along the stacking direction of the main filler sheets, an opening structure is formed between the slanted edges 1006 on both sides of the serration unit 1005 on the lower part of the main filler sheets, and thereby an air inlet 1108 is formed. Along the stacking direction of the main filler sheets, the vertical edges 1007 at the side parts of the main filler sheets which are stacked alternately in the water spraying and demisting filler unit are sealingly connected at alternate to form vertical sealing surfaces 1104.

When the circulating water flowing downwards in the first flow path or the second flow path reaches and enters the serration flow collecting part 1103 and passes through the inverted trapezoidal area of the serration unit 1005 in the serration area 1004 at the lower part of the main filler sheet, the water flow is acted by three forces at this time, wherein the first force is the gravity of the water flow itself and the force is vertically downwards; the second force is the oblique upward blowing force of the cold air flowing in from the lower part of the serration flow accumulating portion in an oblique upward direction; and the third force is the tension generated by the surface tension of the water itself and directed to the surface of the filler sheet, wherein the resultant force of the gravity and the blowing force is directed to the rectangular flow accumulating port, namely the water outlet 1109, of the flat-bottom flow accumulating area and flows in close contact with the main filler sheet under the action of the tension. In fact, because the air also has viscosity, the air flowing into the first or second flow path is not uniformly distributed in the thickness direction of the flow path, and the air speed in the middle of the flow path is high, and the air speed in the area close to the main filler sheets is low, and due to the difference of the airflow speeds in the thickness direction in the flow path, a pressure directed to the surfaces of the filler sheets is generated on the water flow, so that the water flow obliquely flows along the inverted trapezoidal area of the flat-bottom flow accumulating area in the serration area at the lower part of the main filler sheets and enters the rectangular flow accumulating port at the bottom of the flat-bottom flow accumulating area, and finally leaves the water spraying and demisting filler unit from the water outlet 1109 of the serration flow accumulating part.

A water outlet 1109 can abut against a water collecting tank which discharges water in segments, and the tank sidewalls of the tank are higher than the water outlet 1109, and supporting drain bar(s) may be arranged at the bottom of the water collecting tank. The water collecting tank is provided with intermittent water discharging ports along the full length direction, so that water discharging can be realized intermittently.

This embodiment provides a second preferred structure of the water spraying and demisting filler unit.

As shown in FIGS. 4 to 7, a water spraying and demisting filler unit according to a second preferred embodiment of the invention has a plurality of main filler sheets 2001, wherein a flow guiding area is provided at an upper portion of each main filler sheet 2001, a serration area 2002 is provided at a lower portion, and a rectangular evaporation and heat exchange zone 2006 is provided at a middle portion. The serration area 2002 at the lower part of the main filler sheet 2001 is composed of a plurality of serration units 2007. The upper part of the serration units 2007 are inverted trapezoids with short sides downward, and the bottoms of the serration units 2007 are rectangular rectangular flow accumulating ports 2008, and the short sides of the bottoms of the inverted trapezoids are connected with the rectangular flow accumulating ports 2008.

The water spraying and demisting filler unit 2101 is formed by alternately stacking a plurality of main filler sheets 2001, and flow channels are formed between adjacent main filler sheets 2001, which flow channels are referred to as a first flow path and a second flow path respectively. An upper flow guiding part is formed at the upper part of the water spraying and demisting filler unit 2101. A serration flow collecting part 2106 is formed at the lower part of the water spraying and demisting filler unit 2101: in the stacking direction of the main filler sheets, serration areas at the lower parts of the main filler sheets are alternately stacked in the vertical direction of the water spraying and demisting filler unit 1101 to form a serration flow collecting part 2106. The serration flow collecting part 2106 is formed of a plurality of serration flow accumulating parts, and the serration flow accumulating parts are formed of a plurality of serration units 2007 in a serration area below the main filler sheet 2001. A rectangular flow accumulating port 2008 is formed at a lower portion of the serration unit 2007, and a plurality of the rectangular flow accumulating ports 2008 form the water outlet 2109. All the water outlets 2109 open downward and have the same opening direction, and air inlets 2108 are formed on two sides of each water outlet 2109. The number of the serration flow accumulating parts is twice or more than the number of the upper flow guiding parts.

The flow guiding areas arranged at the upper parts of the main filler sheets 2001 are provided with V shaped recesses 2004 in the middle, and horizontal edges 2003 are arranged at two sides of the V shaped recess 2004, and the V shaped flow guiding areas of the alternately stacked main filler sheets are mutually stacked to form a V shaped upper flow guiding part at the upper part of the water spraying and demisting filler unit. The V shaped flow guiding area of the main filler sheets 2001 which are alternately stacked in the water spraying and demisting filler unit 2101 forms a V shaped edge portion. A V shaped sealing surface 2102 is formed between two oblique sides of the V shaped edge. Two flat sides on two sides of the V shaped edge of the V shaped flow guiding area which is arranged at the upper portion of the main filler sheets 2001 form opening structures to form a water inlet and air outlet port 2107. The V shaped sealing surfaces 2102 are arranged at alternate in the stacking direction of the main filler sheets.

The V shaped flow guiding part is a V shaped channel 2103 which is formed by alternately stacking V shaped edges at the upper parts of the main filler sheets 2001 along the stacking direction, and two sides of the V shaped channel 2103 are flat sides at two sides of the V shaped edge of the main filler sheet to form a V shaped flow guiding and water spraying area 2104 which is fully open. When circulating hot water sprayed above the water spraying and demisting filler unit falls to a V shaped flow guiding and water spraying area 2104 of the V shaped flow guiding part, the circulating hot water can simultaneously enter a first flow path and a second flow path; when the circulating hot water sprayed from above only falls into the V shaped channel 2103, the circulating hot water can only enter the first flow path or the second flow path due to the V shaped sealing surfaces 2102 arranged at alternate in a stacked mode, and therefore the first flow path and the second flow path are separated to be with water or without water.

The rectangular evaporation and heat exchange area in the middle of the main filler sheet is provided with vertical edges 2005 at two sides. The vertical edges 2005 of adjacent main filler sheets are sealingly connected at alternate to form vertical sealing surface 2105.

This embodiment provides a schematic principle diagram of a flat-bottom flow accumulating area.

As shown in FIG. 8, when the circulating water flowing downward in the first flow path or the second flow path reaches and enters the serration flow collecting part and passes through the inverted trapezoidal area of the serration unit 3001 in the serration area at the lower portion of the main filler sheet, the liquid flow 3003 is acted by three forces at this time, wherein the first force is the gravity 3005 of the water flow itself and the force is vertically downwards; the second force is the oblique upward blowing force 3004 of the cold air 3002 flowing in from the lower part of the serration flow accumulating portion in an oblique upward direction; and the third force is the tension generated by the surface tension of the water itself and directed to the surface of the filler sheet, wherein the resultant force 3006 of the gravity 3005 and the blowing force 3004 is directed to the rectangular flow accumulating port of the serration unit 3001 and flows in close contact with the main filler sheet under the action of the tension. In fact, because the air also has viscosity, the air flowing into the first or second flow path is not uniformly distributed in the thickness direction of the flow path, and the air speed in the middle of the flow path is high, and the air speed in the area close to the main filler sheets is low, and due to the difference of the airflow speeds in the thickness direction in the flow path, a pressure directed to the surfaces of the filler sheets is generated on the water flow, so that the water flow obliquely flows along the inverted trapezoidal area of the flat-bottom flow accumulating area in the serration area at the lower part of the main filler sheets and enters the rectangular flow accumulating port at the bottom of the serration unit 3001, and finally leaves the water spraying and demisting filler unit from the water outlet of the serration flow accumulating part. In order to ensure the gas-liquid separation effect, the maximum width of each serration unit 3001 is not greater than 500 mm, preferably not greater than 250 mm.

This embodiment provides a variation implementation of the water spraying and demisting filler unit.

As shown in FIG. 9, the serration flow accumulating part is formed by alternately stacking serration units at the lower part of the main filler sheets. In the stacking direction of the main filler sheets, an inclined sealing surface 4003 of the flow accumulating area for closing is arranged between the oblique edges on the same side of the flat-bottom flow accumulating area at the lower parts of the main filler sheets which are alternately stacked in the water spraying and demisting filler unit. An opening structure is formed between the oblique edges on the other side of the flat-bottom flow accumulating area at the lower parts of the main filler sheets, and the opening structure forms an air outlet 4002. A water outlet 4001 is formed by a bottom rectangular flow accumulating port of a serration area at the lower part of the main filler sheets. The water outlets 4001 are all open downward and have the same opening direction.

This embodiment provides a preferable structure of the water collecting tank which discharges water in segments.

As shown in FIG. 10, the lower outlet of the serration flow accumulating part can abut against a water collecting tank 5004 which discharges water in segments, and the tank sidewalls 5001 of the tank are higher than the water outlet, and supporting drain bar(s) 5002 may be arranged at the bottom of the water collecting tank. The water collecting tank 5004 is provided with intermittent water discharging ports 5003, so that water discharging can be realized intermittently.

This embodiment provides a structure in which the water collecting tank of the embodiment 5 is added to the water spraying and demisting filler units of embodiment 1 and embodiment 2.

As shown in FIGS. 11 and 12, which are schematic structural views of the water spraying and demisting filler units and the water collecting tanks in the embodiments 1 and 2, respectively, the serration units 6001 of the serration flow accumulating part below the water spraying and demisting filler units extend into the water collecting tanks 6002. In case that the water discharging is not influenced, the main filler sheets of the water spraying and demisting filler unit can be stably supported.

This embodiment provides a demisting cooling tower according to one preferred embodiment.

As shown in FIGS. 13 to FIG. 15, the demisting cooling tower comprises a tower body, and a cooling tower air inlet 7001 is arranged at the lower part of the tower body, and a water collecting tank is arranged at the upper part of the cooling tower air inlet 7001. A water spraying and demisting filler unit 1101 with the triangular upper flow guiding part is mounted to abut against the upper part of the water collecting tank. The water spraying and demisting filler units are abutted against each other to form a water spraying and demisting filler layer 7011 on the horizontal plane, and water barrier plates 7009 are arranged above the water spraying and demisting filler layer 7011. A subarea water routing system is arranged between the water barrier plates 7009, and a main pipe of the ubarea water routing system crosses the water barrier plates. Deflectable air dampers 7004 for closing or opening channels between the water barrier plates are arranged at the upper positions between the adjacent water barrier plates. Water collectors 7008 are arranged above the air dampers, and fans 7006 and air ducts 7007 are arranged above the water collectors.

The subarea water routing system is provided with a plurality of water routing main pipes 7005, and each water routing main pipe 7005 is connected with several water routing branch pipes 7003. The water routing branch pipes on different water routing main pipes 7005 are arranged at alternate, and the branch pipes extend along a direction which is parallel to the alternate stacking directions of main filler sheets in the water spraying and demisting filler units. A plurality of circulating water spraying heads 7002 are arranged at the lower portions of the water routing branch pipes, and the spraying direction of the spraying heads faces directs toward a V shaped space 7010 formed between triangular flow guiding parts at the top parts of two adjacent water spraying and demisting filler units. The bottom of the water barrier plate 7009 abuts against the top ends of the triangular flow guiding parts of the water spraying and demisting filler units.

Under the action of a fan 7006 at the upper part of the tower body, ambient cold air enters the tower via a cooling tower air inlet 7001 on the lower part of the tower and flows upwards, and when entering the tower and reaching the lower part of the water spraying and demisting filler unit, the ambient cold air passes through the water collecting tank and enters the serration flow accumulating part and enters a first flow path and a second flow path of the water spraying and demisting filler from air inlets on the inclined side surfaces of the serration flow accumulating part. Meanwhile, the circulating hot water outside the tower is sprayed to the upper flow guiding part of the water spraying and demisting filler from the spraying heads 7002 of the water routing branch pipes 7003 after flowing through the water routing main pipes 7005 for distributing water in different regions, and enters the first flow path and the second flow path of the water spraying and demisting filler by means of the water inlet and air outlet port of the flow guiding part at the upper part, and downward circulating hot water is in countercurrent contact with upward cold dry air in the evaporative cooling regions of the first main filler sheet and the second main filler sheet, so that the circulating water is subjected to evaporative cooling.

FIG. 14 shows the demisting cooling tower operating in a demisting operation mode. The water barrier plates 7009 divide the space above the water spraying and demisting filler layer into a plurality of V shaped spaces 7010, and rotatable air dampers 7004 are arranged above the spaces between the water barrier plates 7009, and the air dampers 7004 rotate to a vertical state (open state).

Some water routing main pipes of the subarea water routing system are provided with water, and the other water routing main pipes are not provided with water. The circulating hot water is sprayed via a spraying head by the water routing branch pipes connected with the water routing main pipes having water to a V shaped space 7010 formed between triangular flow guiding parts at the top parts of two adjacent water spraying and demisting filler units at alternate, and further fall to water inlet and air inlet ports of the flow guiding parts on the side surfaces of the triangular flow guiding parts at the top parts of the water spraying and demisting filler units to enter the flow paths connected with the water inlet and air inlet ports of the flow guiding parts. In contrast, there is no water spraying on the other side surface of the triangular flow guiding part at the top parts of the water spraying and demisting filler units, and no water enters the corresponding flow paths from the water inlet and air outlet ports of the flow guiding parts on the other side surface of the triangular flow guiding parts.

In a flow path with water, on one hand, the cold air enters the evaporation and heat exchange area from below and flows upwards; on the other hand, the circulating hot water enters the evaporation and heat exchange area from the flow guiding part and flows downwards, and the two flows are in countercurrent contact, and thus the circulating hot water is evaporated and heat exchanged into circulating cold water, and the cold air is changed into saturated hot humid air. Finally, the saturated hot humid air leaves the demisting filler via the water inlet and air outlet port of the flow guiding part. After the circulating cold water is converged by the serration flow accumulating part, the circulating cold water enters the water collecting tank via the water outlet of the serration flow accumulating part and is intermittently discharged to the water collecting tank at the lower part of the tower by means of the intermittent water discharging port of the water collecting tank.

The water flow discharged from the intermittent water discharging port of the water collecting tank falls into a water collecting tank at the lower part of the tower in a columnar shape to form a circulating cold water columnar flow area. Meanwhile, the cold air enters from the cooling tower air inlet, passes through the circulating cold water columnar flow area and enters the water spraying and demisting filler.

In the flow path without water, the cold air enters the evaporation and heat exchange area from below and flows upwards, and the cold air passes through the evaporation and heat exchange area of the main filler sheet and exchanges heat through a partition wall with the circulating hot water in the other side of the main filler sheet, and cold dry air is changed into hot dry air and flows upwards from the water inlet and air outlet port of the flow guiding part connected with the flow path.

The saturated hot humid air discharged from two side surfaces of the triangular flow guiding part at the upper part of the water spraying and demisting filler is mixed with the hot dry air to become unsaturated air, and the unsaturated air passes through the vertically arranged air damper and is discharged out of the tower via the fan and the air duct, and the aim of demisting is realized.

FIG. 15 shows the demisting cooling tower operating in a closed cooling mode. The water barrier plates 7009 divide the space above the water spraying and demisting filler layer into a plurality of V shaped spaces 7010, and the rotatable air dampers 7004 are arranged at the upper part in the spaces between the water barrier plates 7009, and the air dampers 7004 at the upper part corresponding to the V shaped spaces which spray hot water are horizontally closed to close the flow channel, and the air dampers 7004 at the upper part corresponding to the V shaped spaces which do not spray hot water are in a vertical state (open state).

Preferably, air dampers 7004 above the spraying heads 7002, 8009, 8010 which spray hot water are in a horizontal closed position, and air dampers 7004 above the spraying heads 7002, 8009, 8010 which do not spray hot water are in an open position.

Some water routing main pipes of the partitioned water routing system are provided with water, and the other water routing main pipes are not provided with water. The circulating hot water is sprayed via a spraying head by the water routing branch pipes connected with the water routing main pipes having water to a V shaped space formed between triangular flow guiding parts at the top parts of two adjacent water spraying and demisting filler units at alternate, and further fall to water inlet and air inlet ports of the flow guiding parts on the side surfaces of the triangular flow guiding parts at the top parts of the water spraying and demisting filler units to enter the flow paths connected with the water inlet and air inlet ports of the flow guiding parts. In contrast, there is no water spraying on the other side surface of the triangular flow guiding part at the top parts of the water spraying and demisting filler units, and no water enters the corresponding flow paths from the water inlet and air outlet ports of the flow guiding parts on the other side surface of the triangular flow guiding parts.

Preferably, at least some of the water routing branch pipes spray the spraying water to the flow guiding areas 1002 and 9003 of two adjacent water spraying and demisting filler units by means of the spraying heads, and the spraying water further falls to the water inlet and air inlet ports of the flow guiding parts on the side surfaces of the triangular flow guiding parts at the top parts of the water spraying and demisting filler units, to enter the flow paths connected with the water inlet and air inlet ports of the flow guiding parts.

In a flow path with water, as the air damper corresponding to the V shaped space at the upper part of the filler is horizontally closed, the cold air cannot flow, and thus no cold air enters the flow path, and circulating hot water enters the evaporation and heat exchange area from the flow guiding part and flows downwards. In a flow path without water, the cold air enters an evaporation and heat exchange area from below and flows upwards, and passes through the evaporation and heat exchange area of a main filling sheet, and exchanges heat through a partition wall with the circulating hot water in the other side of the main filler sheet, and cold dry air is changed into hot dry air and flows upwards from the water inlet and air outlet port of the flow guiding part connected with the flow path. The circulating hot water in the flow path with water is changed into circulating cold water, and the circulating cold water is converged by the serration flow accumulating part, enters the water collecting tank via the water outlet of the serration flow accumulating part and is discharged intermittently to the water collecting tank at the lower part of the tower via the intermittent water discharging port of the water collecting tank.

The water flow discharged from the intermittent water discharging port of the water collecting tank falls into a water collecting tank at the lower part of the tower in a columnar shape to form a circulating cold water columnar flow area. Meanwhile, the cold air enters from the cooling tower air inlet, passes through the circulating cold water columnar flow area and enters the water spraying and demisting filler.

The hot dry air passes through the vertically arranged air damper and is discharged out of the tower by means of the fan and the air duct, and water saving and demisting are achieved in the whole process.

FIG. 13 shows the demisting cooling tower operating in an open cooling mode. The water barrier plate 7009 divides the space above the water spraying and demisting filler layer into a plurality of V shaped spaces 7010. The rotatable air damper 7004 is arranged at the upper part in the space between the water barrier plates and is in a vertical state.

All water routing main pipes 7004 of the subarea water routing system are provided with water, and the water routing branch pipes connected with the water routing main pipes spray the circulating hot water via spraying heads 7002 to a V shaped space 7010 formed between triangular flow guiding parts at the top parts of all two adjacent water spraying and demisting filler units. The circulating hot water further falls to water inlet and air inlet ports of the flow guiding parts on the side surfaces of the triangular flow guiding parts at the top parts of the water spraying and demisting filler units, to enter flow paths connected with the water inlet and air inlet ports of the flow guiding parts.

In the first flow path and the second flow path, on one hand, the cold air enters the evaporation and heat exchange area from below and flows upwards; on the other hand, the circulating hot water enters the evaporation and heat exchange area from the flow guiding part and flows downwards, and the two flows are in countercurrent contact, and thus the circulating hot water is evaporated and heat exchanged into circulating cold water, and the cold air is changed into saturated hot humid air. Finally, the saturated hot humid air leaves the demisting filler via the water inlet and air outlet port of the flow guiding part. After the circulating cold water is converged by the serration flow accumulating part, the circulating cold water enters the water collecting tank via the water outlet of the serration flow accumulating part and is intermittently discharged to the water collecting tank at the lower part of the tower by means of the intermittent water discharging port of the water collecting tank.

The water flow discharged from the intermittent water discharging port of the water collecting tank falls into a water collecting tank at the lower part of the tower in a columnar shape to form a circulating cold water columnar flow area. Meanwhile, the cold air enters from the cooling tower air inlet, passes through the circulating cold water columnar flow area and enters the water spraying and demisting filler.

The saturated air passes through a vertically disposed air damper and is discharged outside the tower by means of a fan and an air damper.

This embodiment provides a demisting cooling tower according to another preferred embodiment.

As shown in FIGS. 16 to 18, the demisting cooling tower comprises a tower body. A cooling tower air inlet 8001 is arranged at the lower part of the tower body. The water spraying and demisting filler units 2101 with the V shaped upper flow guiding parts as above are arranged in the tower at the upper part of the cooling tower air inlet 8001. The water spraying and demisting filler units 2101 are abutted against each other to form a water spraying and demisting filler layer 8011 on the horizontal plane, and a high-low water routing system is arranged above the water spraying and demisting filler layer 8011. A water collector 8005 is arranged above the high-low water routing system, and a fan 8007 and an air duct 8006 are arranged above the water collector 8005. The high-low water routing system is provided with a plurality of water routing main pipes. Some of the main pipes are high-level water routing main pipes 8004, and the other main pipes are low-level water routing main pipe 8003. The high-level water routing main pipe 8004 is connected with high-level water routing branch pipes 8008, and the high-level water routing branch pipes 8008 are uniformly arranged above the whole water spraying and demisting filler layer. A high-level spraying head 8009 is arranged at the lower parts of the high-level water routing branch pipes 8008 and directs downwards to the water spraying and demisting filler layer. The low-level water routing main pipe 8003 is connected with low-level water routing branch pipes 8002, and the low-level water routing branch pipe 8002 extend along a direction which is parallel to the same as the alternate stacking direction of main filler sheets in the water spraying and demisting filler unit. A low-level spraying head 8010 is arranged at the lower part of the low-position water routing branch pipe, and the low-level spraying head 8010 directs towards and extends into a V shaped channel of the V shaped upper flow guiding part.

As shown in FIG. 17, when operating in the demisting operation mode, the high-level water routing main pipe 8004 is not provided with water, and the low-level water routing main pipe 8003 is provided with water, and the low-level water routing branch pipes 8002 connected to the low-level water routing main pipe distribute the circulating hot water via the low-level spraying heads 8010 into the V shaped channel of the V shaped upper flow guiding part at the upper parts of the water spraying and demisting unit. Because the V shaped sealing surfaces are arranged in the V shaped channel at alternate in a stacked mode, circulating hot water can only enter the open or unclosed flow path, and therefore it can be achieved that water exists in one flow path but does not exist in the adjacent flow path.

In a flow path with water, on one hand, the cold air enters the evaporation and heat exchange area from below and flows upwards; on the other hand, the circulating hot water enters the evaporation and heat exchange area from the flow guiding part and flows downwards, and the two flows are in countercurrent contact, and thus the circulating hot water is evaporated and heat exchanged into circulating cold water, and the cold air is changed into saturated hot humid air. Finally, the saturated hot humid air leaves the demisting filler via the water inlet and air outlet port of the flow guiding part. After the circulating cold water is converged by the serration flow accumulating part, the circulating cold water enters the water collecting tank via the water outlet of the serration flow accumulating part and is intermittently discharged to the water collecting tank at the lower part of the tower by means of the intermittent water discharging port of the water collecting tank.

The water flow discharged from the intermittent water discharging port of the water collecting tank falls into a water collecting tank at the lower part of the tower in a columnar shape to form a circulating cold water columnar flow area. Meanwhile, the cold air enters from the air inlet 8001 of the cooling tower, passes through the circulating cold water columnar flow area and enters the water spraying and demisting filler unit 2101.

In the flow path without water, the cold air enters the evaporation and heat exchange area from below and flows upwards, and the cold air passes through the evaporation and heat exchange area of the first and second main filler sheets, and exchanges heat through a partition wall with the circulating hot water in the other side of the main filler sheet, and cold dry air is changed into hot dry air and flows upwards from the flow guiding part connected with the flow path.

The saturated hot humid air discharged from two side surfaces of the triangular flow guiding part at the upper part of the water spraying and demisting filler is mixed with the hot dry air to become unsaturated air, and the unsaturated air passes through the water collector and is discharged out of the tower via the fan and the air duct, and the aim of demisting is realized.

As shown in FIG. 16, when operating in water spraying cooling mode, the high-level water routing main pipe 8004 is provided with water, and the low-level water routing main pipe 8003 is not provided with water. The high-level water routing branch pipe 8008 connected to the high-level water routing main pipe 8004 distributes circulating hot water by the high-level spraying heads 8009 to all the areas of the V shaped upper flow guiding part on the upper portion of the water spraying and demisting filler. The sprayed circulating hot water can respectively enter all the first and second flow paths by passing through the V shaped flow guiding and water spraying area.

In the first flow path and the second flow path, on one hand, the cold air enters the evaporation and heat exchange area from below and flows upwards; on the other hand, the circulating hot water enters the evaporation and heat exchange area from the flow guiding part and flows downwards, and the two flows are in countercurrent contact, and thus the circulating hot water is evaporated and heat exchanged into circulating cold water, and the cold air is changed into saturated hot humid air. Finally, the saturated hot humid air leaves the demisting filler via the water inlet and air outlet port of the flow guiding part. After the circulating cold water is converged by the serration flow accumulating part, the circulating cold water enters the water collecting tank via the water outlet of the serration flow accumulating part and is intermittently discharged to the water collecting tank at the lower part of the tower by means of the intermittent water discharging port.

In one embodiment of the invention, when operating in a demisting operation mode, the high-level water routing main pipe is not provided with water, and the low-level water routing main pipe is provided with water. The low-level water routing branch pipe 8002 connected to the low-level water routing main pipe distributes the spraying water by the spraying head 8010 into the V shaped recess 2004. When operating in a water spraying cooling mode, the high-level water routing main pipe is provided with water, and the low-level water routing main pipe is not provided with water. The high-level water routing branch pipe 8008 connected with the high-level water routing main pipe distributes the spraying water by the spraying head 8009 to all the areas of the water inlet and air outlet port.

The water flow discharged from the intermittent water discharging port of the water collecting tank falls into a water collecting tank at the lower part of the tower in a columnar shape to form a circulating cold water columnar flow area. Meanwhile, the cold air enters from the cooling tower air inlet, passes through the circulating cold water columnar flow area and enters the water spraying and demisting filler.

This embodiment provides a water spraying and demisting filler unit according to another preferred embodiment.

As shown in FIGS. 19 to 22, the water spraying and demisting filler unit 9001 is formed by alternately stacking first and second main filler sheets. The first and second main filler sheets form first and second flow paths. The upper part of the water spraying and demisting filler unit is formed with: when viewed from the stacking direction of the filler sheets, in the vertical direction of the water spraying and demisting filler unit, the guiding areas 9003 on the upper parts of the first main filler sheet and the second main filler sheet are alternately stacked to form an upper guide part. The lower part of the water spraying and demisting filler unit is formed with: when viewed from the stacking direction of the filler sheets, in the vertical direction of the water spraying and demisting filler unit, the serration areas 9006 at the lower parts of the first main filler sheet and the second main filler sheet are alternately stacked to form a serration flow collecting part. The serration flow collecting part is formed by a plurality of serration flow accumulating parts. The serration flow accumulating parts are formed by flat-bottom sawteeth in serration areas at the lower parts of the first main filling sheet and the second main filling sheet. A water outlet 9012 is formed in the lower portion of the serration flow accumulating part by means of the rectangular flow accumulating ports at the bottom of a serration areas at the lower portions of the first main filling sheet and the lower portion of the second main filling sheet. The water outlets 9012 all open downward and have the same opening direction. The number of the serration flow accumulating parts is two times or more than that of the upper flow guiding parts.

The upper flow guiding part is mainly used for controllably guiding circulating hot water sprayed from above the water spraying and demisting filler unit into the first flow path and the second flow path via the water inlet and air outlet port 9002. When the first flow path is provided with water and the second flow path is not provided with water, external cold air respectively enters the first flow path and the second flow path by means of a fan. The circulating hot water in the first flow path is in contact with cold air in the evaporation cooling areas of the first main filler sheet and the second main filler sheet, evaporates and dissipates heat, and thus the circulating hot water is cooled, and the cold air in the first flow path is changed into saturated hot humid air. The cold air flowing into the second flow path upwards from the serration flow accumulating part below the water spraying and demisting filler unit passes through the evaporation cooling areas of the first main filler sheet and the second main filler sheet, and the cold air exchanges heat with the circulating hot water in the first flow path by means of the partition walls of the first main filler sheet and the second main filler sheet, and the cold air becomes hot dry air, and flows upwards out from the upper flow guiding area 9003. The saturated hot humid air and hot dry air flowing out upwards from the flow guiding area 9003 at the upper part of the water spraying and demisting filler unit are mixed to become the unsaturated air which is discharged out of the tower, so that water saving and demisting are achieved. During the whole process, a portion of the heat from the circulating hot water is transferred to the cold air through heat exchange by partition wall. This portion of heat is not dissipated through evaporative heat exchange of the water, thereby achieving water savings. When the first flow path and the second flow path are both provided with water, the water spraying and demisting filler unit is equivalent to a common water spraying filler.

The serration flow accumulating area is formed by alternately stacking flat-bottom flow accumulating areas at the lower parts of the first main filler sheet and the second main filler sheet. When viewed from the stacking direction of the filler sheets, an inclined sealing surface 9010 of the flow accumulating area for closing is arranged between the oblique edges on the same side of the flat-bottom flow accumulating area at the lower parts of the first and second main filler sheets which are alternately stacked in the water spraying and demisting filler unit. An opening structure is formed between the oblique edges on the other side of the flat-bottom flow accumulating area at the lower parts of the first and second main filler sheets, and the opening structure forms an air inlet 9011.

A flow guiding spacer 9007 is arranged between triangular flow guiding areas 9003 with upward topmost apexs of the first main filling piece and the second main filling piece, and a flow guiding spacer 9007 is arranged between triangular flow guiding areas with upward topmost apexs of the second main filling piece and the first main filling piece. A flow guiding trough 9013 is formed in an internal flow guiding portion 9014 in the flow guiding spacer. The flow guiding trough uniformly guides water to evaporation and heat exchange areas of the first main filling piece and the second main filling piece. An inlet flow guiding part 9015 is arranged at the head of the flow guiding spacer, and the thickness of the inlet flow guiding part 9015 is the sum of the widths of the first flow path and the second flow path.

After entering the first or second flow path from the water inlet and air outlet port of the flow guiding part, the water is uniformly distributed to the evaporation and heat exchange areas of the first and second main filler sheets via the flow guiding troughs 9013 on the flow guiding spacer 9007, and the width of the evaporation and heat exchange areas of the first and second main filler sheets is the same as the width of the filler.

The water spraying and demisting filler unit comprises a first main filler middle rectangular evaporation and heat exchange area and a second main filler middle rectangular evaporation and heat exchange area, wherein vertical edges are arranged on two sides of the first main filler middle rectangular evaporation and heat exchange area and the second main filler middle rectangular evaporation and heat exchange area. A slope 9004 inclining to the right is arranged on the first main filler middle rectangular evaporation and heat exchange area, and a slope 9004 inclining to the left is arranged on the second main filler middle rectangular evaporation and heat exchange area.

Vertical sealing surfaces 9005 for sealing are arranged between the vertical edges at two side edges of the first main filler middle rectangular evaporation and heat exchange area and the second main filler middle rectangular evaporation and heat exchange area which are alternately stacked in the water spraying and demisting filler units. Openings are formed between the vertical edges at two side edges of the second main filler middle rectangular evaporation and heat exchange area and the first main filler middle rectangular evaporation and heat exchange area which are alternately stacked in the water spraying and demisting filler units.

In an embodiment of the invention, the flow guiding area 1002, 9003 is formed with a plurality of sub flow guiding areas in an isosceles triangle shape tapering upward and distributed along the width direction of the main filler sheets 1001, 2001. The waists of adjacent main filler sheets 1001, 2001 located at two sides of a topmost apex of the sub flow guiding areas are alternately and sealingly connected. The flow channel includes a first flow path and a second flow path, and the flow guiding area controllably guides the spraying water into the first flow path and the second flow path via the water inlet and air outlet port.

This embodiment provides a water spraying and demisting filler unit according to yet another preferred embodiment.

As shown in FIGS. 23 and 24, the water spraying and demisting filler unit 9101 is formed by alternately stacking first and second main filler sheets, and the first and second main filler sheets form first and second flow paths. The upper part of the water spraying and demisting filler unit is provided with: when viewed from the stacking direction of the filler sheets, in the vertical direction of the water spraying and demisting filler unit, upper flow guiding areas of the first main filler sheets and the second main filler sheets are alternately stacked to form an upper flow guiding part above the filler unit. The lower part of the filler unit is provided with: when viewed from the stacking direction of the filler sheets, in the vertical direction of the water spraying and demisting filler unit, serration areas 9105 at the lower parts of the first main filler sheet and the second main filler sheet are alternately stacked to form a serration flow accumulating part; the serration flow accumulating part is formed by a plurality of serration flow accumulating parts, and the serration flow accumulating parts are formed by flat-bottom sawteeth in serration areas at the lower parts of the first main filling sheets and the second main filling sheets. The lower part of the serration flow accumulating is provided with rectangular flow accumulating ports at the bottom of the serration areas at the lower part of the first main filler sheet and the second main filler sheet to form water outlets of the serration flow accumulating parts. The water outlets are all opening downwards and the opening directions are the same. The number of the serration flow accumulating parts is two times or more than that of the upper flow guiding parts.

The flow guiding areas arranged at the upper parts of the first main filler sheets and the second main filler sheets are V shaped flow guiding areas including a middle V shaped edge and flat edges at two sides of the middle V shaped edge. The V shaped flow guiding areas of the first main filler sheets and the second main filler sheets which are alternately stacked are mutually stacked to form a V shaped upper flow guiding part (namely a V shaped channel 9102) at the upper part of the water spraying and demisting filler unit. The V shaped edge parts of V shaped flow guiding areas of first main filler sheets and second main filler sheets which are alternately stacked in the water spraying and demisting filler unit are provided with V shaped sealing surfaces 9106 for sealing between oblique edges on two sides of the V shaped edges. The flat edges on two sides of the V shaped edges of the V shaped flow guiding areas which are arranged on the upper parts of the first main filler sheets and the second main filler sheets form an opening structure.

The V shaped flow guiding part is a V shaped channel along the stacking direction which is formed by alternately stacking V shaped edges at the upper parts of the first main filler sheets and the second main filler sheets. The flat edges at two sides of the V shaped edges of the first main filler sheets and the second main filler sheets form a V shaped flow guiding and water spraying area 9103 which are all opened. When circulating hot water sprayed from the upper part of the water spraying and demisting filler unit falls to the V shaped flow guiding and water spraying area 9103 of the V shaped flow guiding part, the circulating hot water can simultaneously enter the first flow path and the second flow path. When the circulating hot water sprayed from the upper part only falls into the V shaped channel 9102, the circulating hot water can only enter the first flow path or the second flow path due to the V shaped sealing surfaces 9106 arranged at alternate in a stacked mode, and therefore the first flow path and the second flow path are separated to be with water and without water.

The first main filler middle rectangular evaporation and heat exchange area and the second main filler middle rectangular evaporation and heat exchange area are provided with vertical edges at two sides, and the slope 9104 inclined to the right is arranged on the first main filler middle rectangular evaporation and heat exchange area, and the slope 9104 inclined to the left is arranged on the second main filler middle rectangular evaporation and heat exchange area.

In one embodiment of the invention, the flow guiding areas 1002, 9003 are formed to have a V shaped recess 2004 at a middle portion of a top edge, and adjacent main filler sheets 1001, 2001 are sealingly connected at the V shaped recess 2004 at alternate, and the fluid passage includes a first flow path and a second flow path. When spraying water falls on the V shaped recess 2004 and both sides thereof, the spraying water simultaneously enters the first flow path and the second flow path. When the circulating hot water sprayed from above falls only on the V shaped recess 2004, the spraying water can enter only the first flow path or the second flow path.

In a word, by adopting the technical means and the solutions, the water spraying and demisting filler unit and the cooling tower according to the invention have the following beneficial effects:

1. 1. The main filler sheets in the water spraying and demisting filler unit can be used for both water spraying cooling and partition wall heat exchange, and an intermediate partition plate is not needed. All the main filler sheets in the water spraying and demisting filler unit can be used for heat exchange in the demisting operation mode, and the heat exchange area is doubled compared with that of the common water spraying and demisting filler, and the water saving and demisting capability is improved.
2. 2. The water spraying and demisting filler unit directly forms a flow channel between the main filler sheets without intermediate spacers, so that the resistance is smaller.
3. 3. The unique serration flow accumulating structure and the operating principle of the invention allow cold air to enter through the serration area at the lower part of the water spraying and demisting filler unit, and can directly replace common water spraying filler, and does not need to design dense partition plates at the lower part, and thus the water spraying and demisting filler unit has novelty, extremely strong practicability, low cost and easy reconstruction and maintenance.
4. 4. The cooling tower according to the preferred embodiment of the invention not only can operate in a water spraying operation mode and a demisting operation mode, but also can realize closed cooling operation, and the water saving rate is close to 100 percent.
5. 5. In the cooling tower of the preferred embodiment of the invention, the upper part of the water spraying and demisting filler layer does not need to be provided with water barrier plates, so that the reconstruction is simpler to be performed.

In another aspect, FIGS. 25 to 37 provide a demisting filler unit and a demisting cooling tower with the same according to multiple different embodiments, wherein the demisting filler unit comprises a plurality of heat exchange fins which are arranged in a stacking way. The bottom edges and the opposite side edges of the adjacent heat exchange fins are sealed and connected with each other at alternate to form a cold dry airflow channel and a hot humid airflow channel which are alternately distributed along the stacking direction and can exchange heat via the partition walls of the heat exchange fins. The cold dry airflow channel is provided with a pair of cold channel air inlets which are positioned at the side edge positions and opposite to each other and a cold channel air outlet which is positioned at the top edge position of the heat exchange fins. The hot humid airflow channel is provided with a hot channel air inlet which is positioned at the bottom edge position and a hot channel air outlet which is positioned at the top edge position of the heat exchange fin and is alternately distributed with the cold channel air outlet along the stacking direction. For example, in FIGS. 25 and 26, six plates are schematically shown stacked in a left-to-right direction, wherein the first heat exchange fin is connected to the bottom edge of the second heat exchange fin in a sealing manner, and the side edges at the two sides are separated from each other to form a pair of cold channel air inlets; the second heat exchange fin and the third heat exchange fin are respectively connected with two side edges thereof in a sealing way, and the bottom edges of the second heat exchange fin and the third heat exchange fin are separated from each other to form a heat channel air inlet; and the like, so that cold dry airflow channels and hot humid airflow channels are formed which are alternately distributed in the stacking direction and can exchange heat via the partition walls of the heat exchange fins.

Due to the fact that the pair of cold channel air inlets for introducing cold air are arranged, introduced cold air enters the demisting filler unit via the cold channel air inlets in directions facing each other, and turns and flows to the cold channel air outlets, and thereby the flowing length of the cold air in the cold dry airflow channel is obviously shortened, and the resistance of the cold air channel can be effectively reduced, and the air volume and the flow rate of the cold air can be increased, and thus the heat exchange coefficient is improved, and the demisting effect is improved. In particular, the opposite side edges of the heat exchange fins can be arranged to extend in the vertical direction, and the flowing length of cold air in the cold dry airflow channel is only half or less of the width of the heat exchange fins, and the resistance of the cold airflow channel can be reduced by about 50 percent or more, and the demisting effect can be obviously improved.

In the demisting cooling tower shown in FIGS. 30 and 31, a plurality of groups of demisting filler units 2001' are horizontally arranged in the tower body 2005' with intervals, and the cold air inlet channel 2012' for introducing cold air is positioned in the interval between the adjacent demisting filler units 2001', without reserving channel space for introducing cold air in the height space between the demisting filler layer 2010' and the spraying unit 2004', so that the occupation of the height space can be reduced, and the overall height of the whole tower can be reduced. In addition, by providing an air damper switchable between an open position and a closed position in the cold air inlet channel (preferably, on both the upper and lower sides), the demisting cooling tower is allowed to operate in a water collecting and demisting operation mode or a thermal operation mode as needed. Thereby, in summer, the air damper is switched to the open position (FIG. 31), and the louvers 2011' on the tower side wall are closed, and the hot humid air flows upward to above the demisting filler layer 2010' by means of the hot humid airflow channel and cold dry airflow channel of the demisting filler units 2001' and the cold air inlet channel 2012' at the same time, and is discharged out of the cooling tower. In winter, the air damper is switched to a closed position (FIG. 30), and the louver 2011' is opened, and the cold dry air enters a cold dry airflow channel of the demisting filler unit 2001' by means of the cold air inlet channel 2012', and hot humid air enters a hot humid airflow channel of the demisting filler unit, so that water vapor in the hot humid air is condensed and falls back into the tower by means of exchange heat via the partition walls of the heat exchange fins, and the demisting purpose is achieved.

Various embodiments of the invention are described below with reference to the accompanying drawings. It is to be understood that these embodiments are merely illustrative and that technical features in different embodiments may be interchanged to form other further embodiments within the scope of the invention without departing from the technical principles thereof.

This embodiment provides a preferred construction of the demisting filler unit.

As shown in FIGS. 25 to FIG. 29, a demisting filler unit 2001' is provided, wherein the demisting filler unit 2001' comprises a plurality of vertically arranged and stacked heat exchange fins 1001', and adjacent heat exchange fins 1001' form cold dry airflow channels 1011' and hot humid airflow channels 1012' which are alternately arranged. The cold dry airflow channel 1011' is used for circulating cold dry air 1015' coming from the external environment, and the hot humid airflow channel 1012' is used for circulating hot humid air 1017' rising from the water spraying filler, and the two air flows have temperature difference and exchange heat via the partition walls of the heat exchange fins.

The heat exchange fin 1001' has side edges 1016' on the left and right sides, and top and bottom edges 1014' and 1013' on the upper and lower sides respectively. The side edges 1016' at two sides of the heat exchange fin 1001' are provided with vertical edge sealing surfaces 1004', and the deflection directions of the vertical edge sealing surfaces 1004' at two sides of the same heat exchange fin 1001' are the same, and the deflection directions of the vertical edge sealing surfaces 1004' at two sides of adjacent fins 1001' are opposite. The bottom edge 1014' of the heat exchange fin 1001' is deflected to form a horizontal edge sealing surface 1008', and the deflection direction is opposite to the vertical edge sealing surface 1004' of the heat exchange fin 1001', and the deflection direction of the horizontal edge sealing surface 1008' of the adjacent heat exchange fin 1001' is opposite.

Adjacent vertical edge sealing surfaces 1004' are adhesively sealed by the vertical sealing surfaces 1005' connected thereto, and adjacent horizontal edge sealing surfaces 1008' are adhesively sealed by the horizontal sealing surfaces 1010' connected thereto.

The adjacent heat exchange fins 1001' form cold channel air inlets 1003' on the side of the side edges 1016' on both sides without the vertical edge sealing surfaces. The adjacent heat exchange fins form hot channel air inlets 1009' on the side of the bottom edges 1013' without the horizontal edge sealing surfaces. The cold dry air 1015' enters the cold dry airflow channel 1011' inside the demisting filler unit in directions facing each other by means of the paired cold channel air inlets 1003' on both sides of the demisting filler unit 2001'. The hot humid air 1017' rising from the water spraying filler enters the hot humid airflow channel 1012' inside the demisting filler unit via the hot channel air inlets 1009'.

As shown in FIG. 28, passing through the cold channel air inlets 1003' on both sides of the demisting filler unit, the cold dry airflow 1015' enters the cold dry airflow channel 1011' along the horizontal direction and flows in directions facing each other.

As shown in FIGS. 25, 28 and 29, the top edges 1014' of the upper portions of adjacent heat exchange fins 1001' constitute hot channel air outlets 1006' and cold channel air outlets 1007' that alternate with one another. The hot channel air outlet 1006' and the cold channel air outlet 1007' are in the same direction and are both directing upward. The hot humid airflow channel 1012' and the cold dry airflow channel 1011' are not communicated with each other inside the demisting filler unit 2001', and the cold air and the hot air which finish heat exchange inside the demisting filler unit 2001' are respectively discharged upwards from the cold channel air outlet 1007' and the hot channel air outlet 1006'.

As shown in FIGS. 25 and 27, at the position of the heat exchange fin 1001' near the bottom edge 1013', there are provided water deflecting and collecting structures 1002' protruding or recessed in the same direction. The hot humid air 1017' entering the hot humid airflow channel 1012' first passes through the water deflecting and collecting structures 1002', and the entrained spraying droplets are caught by the water deflecting and collecting structures. The water deflecting and collecting structures 1002' extend into the hot humid airflow channel 1012' so that the airflow introduced from the hot channel inlet impinges on the water deflecting and collecting structures and is deflected, thereby changing the direction of the airflow introduced from the hot channel inlet in the hot humid airflow channel, so that the airflow impinging on the heat exchange fins 1001' can better exchange heat with the cold dry air 1015' in the adjacent cold air inlet channel 2012' to capture at least some of the moisture entrained in the air flow. In a preferred embodiment, the cross section of the water deflecting and collecting structure 1002' may be triangular, rectangular, semicircular or trapezoidal.

This embodiment provides a structure of a demisting cooling tower by using the demisting filler unit 2001' in the first embodiment (embodiment 1).

As shown in FIG. 30, the demisting cooling tower of the invention includes a tower body 2005'. A cooling tower air inlet 2002' is arranged at the lower part of the tower body. A water spraying filler layer 2003' is arranged at the upper side of the cooling tower air inlet 2002'. A spraying unit 2004' for spraying circulating water is arranged at the upper side of the water spraying filler layer 2003'. The spraying unit 2004' has a cold air inlet channel 2012' and a demisting filler unit 2001' arranged with intervals at the upper side. The demisting filler layer 2010' is composed of a plurality of demisting filler units 2001', and a fan 2009' and a air duct 2008' which are positioned at the top of the tower body 2005' are arranged above the demisting filler layer 2010'.

The demisting filler units 2001' and the cold air inlet channel 2012' which are alternately arranged are arranged on the same horizontal plane.

The cold air inlet channel 2012' of the demisting cooling tower is connected with a louver 2011' on the side wall of the tower body, and the cold dry airflow 1015' can enter the cold air inlet channel 2012' via the louver 2011'. The deflectable air dampers 2007' are respectively arranged above and below the cold air inlet channel 2012' so as to be capable of being switched between an open position and a closed position. The air damper 2007' may be rotatable about its central axis of rotation, either in a horizontal position (demisting operation mode) or in a vertical position (non-demisting operation mode).

In the demisting cooling tower, cold channel air inlets 1003' on two sides of each demisting filler unit 2001' are respectively in communication with the cold air inlet channels 2012' adjacent to two sides of the demisting filler unit.

A horizontally arranged water collector 2006' is provided at the middle position of the cold air inlet channel 2012'.

In the demisting cooling tower, four groups of demisting filler units 2001' are arranged.

Cold dry air 1015' can horizontally enter via a louver 2011' a cold channel air inlet 1003' of the demisting filler unit connected with the cold air inlet channel 2012', and further enters the demisting filler unit. The hot humid air 1017' entrained with the spraying droplets raised from the water spraying filler layer 2003' enters the hot humid airflow channel 1012' from the lower part of the demisting filler unit via the hot channel air inlet 1009'. When the hot humid air 1017' entrained with the spraying droplets enters the hot humid airflow channel 1012', the hot humid air 1017' entrained with the spraying droplets passes through the water deflecting and collecting structure 1002', and is deflectd by the water deflecting and collecting structure 1002'. During the process, because the density of the spraying droplets entrained by the hot humid air is greatly higher than that of the hot humid air, the inertia is large, and the entrained spraying droplets impact the upstream side of the water deflecting and collecting structure 1002', and the spraying droplets entrained by the hot humid air are captured and removed by the water deflecting and collecting structure 1002'.

After that, the hot humid air 1017' passes through the water deflecting and collecting structure and further enters the hot humid airflow channel 1012' to perform partition wall heat exchange with the cold dry air entering the cold dry airflow channel 1011' from the cold channel air inlet 1003', and the hot humid air is condensed. Because of heat exchange with cold dry air, the temperature of the hot humid air is reduced, and the saturated hot humid air separates out condensed water along with the temperature reduction and the condensed water flows back into the tower by gravity.

After the cold and hot airflow exchanges heat in above-mentioned demisting filler unit, the cold dry air 1015' which comes from ambient environment is heated, and the temperature rises, and the hot humid air 1017' is cooled down, and the cold dry air 1017' that enters the demisting filler unit via the cold channel air inlets on two opposite sides of the demisting filler unit turns to upwards in the filler. Finally, the cooled hot humid air 1017' and the heated cold dry air 1015' flow upwards in the hot channel air outlet 1006' and cold channel air outlet 1007' respectively to leave the water collecting and demisting filler layer and mix with each other, become unsaturated air, and discharge outside the tower under the effect of fan 2009', thereby so that the water collecting and demisting are realized.

The water collecting and demisting cooling tower according to the invention can operate in both a water collecting and demisting operation mode and a thermal operation mode. In the water collecting and demisting operation mode, a portion of external cold air is directly introduced into the water collecting and demisting filler in the tower, so that the water collecting and demisting of the cooling tower are realized. In the thermal operation mode, the external cold air completely passes through the water spraying filler, and the cooling tower has the maximum circulating water cooling capacity.

In the water collecting and demisting operation mode, the air dampers 2007' on the upper and lower sides of the cold air inlet channel 2012' are all in the horizontal position (closed position). The circulating hot water is uniformly sprayed on the water spraying filler layer 2003' by means of the spraying unit 2004'. The external cold dry air enters the cooling tower via the cooling tower air inlet 2002' at the lower part of the tower body under the action of the fan 2009', flows upwards in the water spraying filler layer 2003', is in countercurrent contact with the circulating hot water sprayed above from the water spraying filler layer, and is subjected to mass transfer and heat transfer on the surface of the water spraying filler. The circulating hot water is cooled and enters the water collecting tank below the water spraying filler, and the external cold dry air passing through the water spraying filler is heated to become saturated hot humid air 1017', leaves the water spraying filler, and passes through the spraying unit 2004' to reach the lower side of the demisting filler layer 2010'. The hot humid air 1017' enters the interior of the demisting filler unit via the hot channel air inlet 1009' of the demisting filler unit, and under the suction action of the fan, the external cold dry air 1015' enters via the opened louver 2011' the cold air inlet channel defined by the upper and lower air dampers 2007' of the cold air inlet channel 2012' and the cold channel air inlet of the demisting filler unit, and then enters the cold dry airflow channel 1011' of the demisting filler unit. Inside the demisting filler unit, cold dry air and hot humid air are subjected to exchange heat via the partition walls of the heat exchange fins, and the hot humid air is cooled, and the cold dry air is heated. The condensed water produced by the hot humid air returns to the tower by gravity. The heated cold dry air turns upwards from the horizontal direction and is mixed with the condensed hot humid air so as to flow upwards together after leaving the demisting filler layer to become unsaturated gas which is discharged out of the cooling tower via a fan.

In summer, the cooling tower does not need demisting, and meanwhile, the cooling tower is high in operation load in summer, and the cooling tower needs to have the maximum cooling capacity and can operate in a thermal operation mode. At this time, as shown in FIG. 31, the air dampers 2007' on the upper and lower sides of the cold air inlet channel 2012' are all in the vertical position (open position). The circulating hot water is uniformly sprayed on the water spraying filler layer 2003' by means of the spraying unit 2004'. The external cold dry air enters the cooling tower via the cooling tower air inlet 2002' at the lower part of the tower body under the action of the fan 2009', flows upwards through the water spraying filler layer 2003', is in countercurrent contact with the circulating hot water sprayed above from the water spraying filler layer 2003', and is subjected to mass transfer and heat transfer on the surface of the water spraying filler, so that the circulating hot water is cooled and enters the water collecting tank below the water spraying filler, and the external cold dry air passing through the water spraying filler is heated to become saturated hot humid air 1017'. The hot humid air leaves the water spraying filler, and after passing through the spraying unit 2004', the hot humid air becomes two portions of saturated hot humid air, wherein one portion of saturated hot humid air passes through the hot channel air inlet 1009' of the demisting filler unit, passes through the water deflecting and collecting structure 1002', enters the hot humid airflow channel 1012', and leaves upwards from the hot channel air outlet 1006' above the demisting filler unit; another portion of saturated hot humid air flows through the cold air inlet channel and exits upwardly by removing entrained spraying droplets while passing through a water collector 2006' disposed in the middle of the cold air inlet channel 2012'. The two streams of hot humid air without entrained droplets are finally discharged out of the cooling tower by means of the fan and the air duct.

In one embodiment of the invention, when the air damper 2007' is switched to the closed position, the louver 2011' is opened, and the cold dry air 1015' enters the cold dry airflow channel 1011' of the demisting filler unit 2001' via the cold air inlet channel 2012'.

In another embodiment of the invention, when the air damper 2007' is switched to the open position, the louver 2011' is closed, and the hot humid air flows upward through both the hot humid airflow channel 1012' and the cold dry airflow channel 1011' of the demisting filler unit 2001' and the cold air inlet channel 2012' at the same time.

This embodiment provides a first variation of the demisting filler unit.

As shown in FIG. 32, the demisting filler unit is formed by stacking a plurality of vertically arranged heat exchange fins 3001', and adjacent heat exchange fins 3001' form a cold dry airflow channel and a hot humid airflow channel which are alternately arranged. The cold dry airflow channel is used for circulating cold dry air from the external environment, and the hot humid airflow channel is used for circulating hot humid air rising from the water spraying filler, and the two airflows have temperature difference and exchange heat via the partition walls of the heat exchange fins.

The heat exchange fin 3001' has side edges on the left and right sides, and top and bottom edges and on the upper and lower sides respectively. The side edges at two sides of the heat exchange fin are provided with vertical edge sealing surfaces 3007' which are deflected in the same direction. The deflection directions of the vertical edge sealing surfaces 3007' at two sides of the adjacent heat exchange fins are opposite. The bottom edges of the heat exchange fin are provided with horizontal edge sealing surfaces which are deflected in opposite directions from the vertical edge sealing surfaces. The deflection directions of the horizontal edge sealing surfaces of the adjacent heat exchange fins are opposite.

Adjacent vertical edge sealing surfaces 3007' are adhesively sealed by the vertical sealing surfaces 3007' connected thereto, and adjacent horizontal edge sealing surfaces are adhesively sealed by the horizontal sealing surfaces connected thereto.

The adjacent heat exchange fins are spaced from each other on the side of the side edges on both sides without the vertical edge sealing surfaces 3007', to form cold channel air inlets 3006'. The adjacent heat exchange fins form hot channel air inlets on the side of the bottom edges without the horizontal edge sealing surfaces. The cold dry air enters the cold dry airflow channel inside the demisting filler unit in directions facing each other by means of the cold channel air inlets 3006' on both sides of the demisting filler unit. The hot humid air rising from the water spraying filler enters the hot humid airflow channel inside the demisting filler unit via the hot channel air inlets.

Passing through the cold channel air inlets 3006' on both sides of the demisting filler unit, the cold dry airflow enters the cold dry airflow channel along the horizontal direction and flows in directions facing each other.

The top edges of adjacent heat exchange fins are spaced from each other to constitute hot channel air outlets 3004' and cold channel air outlets 3005' that alternate with one another. The hot channel air outlet 3004' and the cold channel air outlet 3005' of the demisting filler unit are in the same direction and are both directing upward. The hot humid airflow channel and the cold dry airflow channel are not communicated with each other inside the demisting filler unit, and the cold air and the hot air which finish heat exchange inside the demisting filler unit are respectively discharged upwards from the cold channel air outlet 3004' and the hot channel air outlet 3005'.

At the position of the heat exchange fin near the bottom edge, there are provided water deflecting and collecting structures 3009' protruding or recessed in the same direction. The hot humid air entering the hot humid airflow channel first passes through the water deflecting and collecting structures 3009', and the entrained spraying droplets are caught by the water deflecting and collecting structures.

The top edges of the adjacent heat exchange fins of the demisting filler unit are provided with horizontal edge sealing surfaces 3003' at the parts close to the two side edges, and the deflection directions of the horizontal edge sealing surfaces 3003' of the heat exchange fins are the same. The deflection directions of the horizontal edge sealing surfaces 3003' of the adjacent heat exchange fins are opposite, and the horizontal edge sealing surfaces 3003' are mutually bonded and sealed by means of horizontal sealing surfaces 3002'. The rest portions of the top edge are spaced from each other, so that the cold channel air outlet 3005' only extends in the middle of the top edge, and the length of a flow path of cold dry airflow in the cold dry airflow channel can be ensured, and the heat exchange effect is ensured.

This embodiment provides a second variation of the demisting filler unit.

As shown in FIG. 33, the demisting filler unit is formed by stacking a plurality of vertically arranged heat exchange fins 4001'. The adjacent heat exchange fins 4001' form a cold dry airflow channel and a hot humid airflow channel which are arranged alternately. The cold dry airflow channel is used for circulating cold dry air from the external environment, and the hot humid airflow channel is used for circulating hot humid air rising from the water spraying filler, and the two airflows have temperature difference and exchange heat via the partition walls of the heat exchange fins.

The heat exchange fin 4001' has side edges at the left and right sides, top and bottom edges at the upper and lower sides. The part of the top edge near the two side edges is a horizontal short edge, and the rest part is V shaped.

The side edges at two sides of the heat exchange fin 4001' are provided with vertical edge sealing surfaces 4007' which are deflected in the same direction. The deflection directions of the vertical edge sealing surfaces at two sides of the adjacent heat exchange fins 4001' are opposite. The bottom edges of the heat exchange fin are provided with horizontal edge sealing surfaces which are deflected in opposite directions from the vertical edge sealing surfaces. The deflection directions of the horizontal edge sealing surfaces of the adjacent heat exchange fins are opposite. Adjacent vertical edge sealing surfaces are adhesively sealed by the vertical sealing surfaces 4008' connected thereto, and adjacent horizontal edge sealing surfaces are adhesively sealed by the horizontal sealing surfaces connected thereto.

The adjacent heat exchange fins are spaced from each other on the side of the side edges on both sides without the vertical edge sealing surfaces, to form cold channel air inlets 4006'. The adjacent heat exchange fins form hot channel air inlets on the side of the bottom edges without the horizontal edge sealing surfaces. The cold dry air enters the cold dry airflow channel inside the demisting filler unit in directions facing each other by means of the cold channel air inlets 4006' on both sides of the demisting filler unit. The hot humid air rising from the water spraying filler enters the hot humid airflow channel inside the demisting filler unit via the hot channel air inlets.

Passing through the cold channel air inlets 4006' on both sides of the demisting filler unit, the cold dry airflow enters the cold dry airflow channel along the horizontal direction and flows in directions facing each other.

The top edges of the adjacent heat exchange fins defining the hot humid air channel form hot channel air outlets 4004' which are arranged at alternate, and the hot channel air outlets 4004' extend in the whole length area of the top edges. The top edges of adjacent heat exchange fins defining the cold dry airflow channels are sealingly connected at locations adjacent the side edges and form a cold channel air outlet 4005' extending in the middle of the top edges.

The hot channel air outlet 4004' and the cold channel air outlet 4005' of the demisting filler unit are in the same direction and are both directing upward. The hot humid airflow channel and the cold dry airflow channel are not communicated with each other inside the demisting filler unit, and the cold air and the hot air which finish heat exchange inside the demisting filler unit are respectively discharged upwards from the cold channel air outlet 4004' and the hot channel air outlet 4005'.

At the position of the heat exchange fins of the demisting filler unit near the bottom edge, there are provided water deflecting and collecting structures 4009' protruding or recessed in the same direction. The hot humid air entering the hot humid airflow channel first passes through the water deflecting and collecting structures 4009', and the entrained spraying droplets are caught by the water deflecting and collecting structures.

The top edges of the adjacent heat exchange fins of the demisting filler unit are provided with horizontal edge sealing surfaces 4003' at the parts close to the two side edges, and the deflection directions of the horizontal edge sealing surfaces 4003' of the heat exchange fins are the same. The deflection directions of the horizontal edge sealing surfaces 4003' of the adjacent heat exchange fins are opposite, and the horizontal edge sealing surfaces 4003' are mutually bonded and sealed by means of horizontal sealing surfaces 4002'. The rest portions of the top edge are spaced from each other, so that the cold channel air outlet 4005' only extends in the middle of the top edge, and the length of a flow path of cold dry airflow in the cold dry airflow channel can be ensured, and the heat exchange effect is ensured.

Because the cold dry air enters the demisting filler unit via the cold channel air inlets 4006' at the two sides and turns upwards to flow out from the interior, and the flow speed of the turning and upwards flowing out is about twice of the flow speed of the cold air at the cold channel air inlets 4006', and the air resistance is increased, and the V shaped outlet can effectively reduce the upward resistance of the merged left and right cold air.

This embodiment provides a third variation of the demisting filler unit.

As shown in FIGS. 34 to 37, the demisting filler unit is formed by stacking a plurality of vertically arranged heat exchange fins 5001', and adjacent heat exchange fins 5001' form a cold dry airflow channel and a hot humid airflow channel which are arranged alternately. The cold dry airflow channel is used for circulating cold dry air from the external environment, and the hot humid airflow channel is used for circulating hot humid air rising from the water spraying filler, and the two air flows have temperature difference and exchange heat via the partition walls of the heat exchange fins.

The heat exchange fin 5001' is generally rectangular in shape with side edges on the left and right sides and top and bottom edges on the upper and lower sides.

The side edges at two sides of the heat exchange fin 5001' are provided with vertical edge sealing surfaces 5011' which are deflected in the same direction. The deflection directions of the vertical edge sealing surfaces at two sides of the adjacent heat exchange fins 5001' are opposite. The bottom edges of the heat exchange fin 5001' are provided with horizontal edge sealing surfaces which are deflected in opposite directions from the vertical edge sealing surfaces. The deflection directions of the horizontal edge sealing surfaces of the adjacent heat exchange fins are opposite. Adjacent vertical edge sealing surfaces 5011' are adhesively sealed by the vertical sealing surfaces 5012' connected thereto, and adjacent horizontal edge sealing surfaces are adhesively sealed by the horizontal sealing surfaces connected thereto.

The adjacent heat exchange fins are spaced from each other on the side of the side edges on both sides without the vertical edge sealing surfaces, to form cold channel air inlets 5002'. The adjacent heat exchange fins are spaced from each other on the side of the bottom edges without the horizontal edge sealing surfaces, to form hot channel air inlets 5010'. The cold dry air enters the cold dry airflow channel inside the demisting filler unit in directions facing each other by means of the cold channel air inlets 5002' on both sides of the demisting filler unit. The hot humid air rising from the water spraying filler enters the hot humid airflow channel inside the demisting filler unit via the hot channel air inlets 5010'.

Passing through the cold channel air inlets 5002' on both sides of the demisting filler unit, the cold dry airflow enters the cold dry airflow channel along the horizontal direction and flows in directions facing each other.

The top edges of adjacent heat exchange fins are spaced from each other to form hot channel air outlets 5007' and cold channel air outlets 5006' which are alternately arranged. The hot channel air outlet 5007' and the cold channel air outlet 5006' of the demisting filler unit are in the same direction and are both directing upward. The hot humid airflow channel and the cold dry airflow channel are not communicated with each other inside the demisting filler unit, and the cold air and the hot air which finish heat exchange inside the demisting filler unit are respectively discharged upwards from the hot channel air outlet 5007' and the cold channel air outlet 5006'.

At the position of the heat exchange fins of the demisting filler unit near the bottom edge, there are provided water deflecting and collecting structures 5003' protruding or recessed in the same direction. The hot humid air entering the hot humid airflow channel first passes through the water deflecting and collecting structures 5003', and the entrained spraying droplets are caught by the water deflecting and collecting structures 5003'.

In the demisting filler unit, the heat exchange fins 5001' are provided with heat channel flow guiding strips 5005', and the heat channel flow guiding strips are protruding towards the hot humid airflow channel, and the height of the protrusion is less than 1/4 of the thickness of the hot humid airflow channel, and the heat channel flow guiding strips 5005' extend in the vertical direction. The heat exchange fins 5001' are further provided with cold channel flow guiding strips 5009', the cold channel flow guiding strips 5009' are protruding towards the cold dry airflow channel, and the height of the protrusion is less than 1/4 of the thickness of the cold dry airflow channel, and the cold channel flow guiding strip 5009' extends in the horizontal direction.

The heat exchange fin can also be provided with a turbulence bar 5008', and the adjacent turbulence bars 5008' are protruding or recessing in opposite directions. That is, the adjacent turbulence bars 5008' can protrude from the heat exchange fins towards the dry-cold airflow channel and the wet-hot airflow channel, respectively, and the turbulence bars 5008' can increase the turbulence intensity of the air or fluid, thereby improving the heat exchange effect. Thus, the turbulence bars 5008' promote greater turbulence in the airflow by disrupting the laminar flow of the airflow, thereby increasing the contact area and heat exchange rate between the airflow and the heat exchange surfaces of the heat exchange fins. In addition, the turbulence bars 5008' can also reduce the thickness of the boundary layer, prevent airflow from forming thermal resistance on the heat exchange surfaces of the heat exchange fins, and further improve the heat exchange efficiency.

The heat exchange fin can also be provided with columnar supports 5004', and the adjacent columnar supports 5004' of the heat exchange fins are protruding in opposite directions. The heights of the columnar supports 5004' with the opposite protruding directions of the adjacent heat exchange fins are 1/2 of the thickness of the cold dry airflow channel or the hot humid airflow channel. The columnar supports 5004' opposite to each other of the adjacent heat exchange fins are mutually bonded together to support the cold dry airflow channel and the hot humid airflow channel.

By means of the technical solutions, the demisting filler unit according to the invention is provided with a pair of cold channel air inlets for introducing cold air, and the introduced cold air enters the demisting filler unit in opposite directions via the cold channel air inlets and turns there and flows to the cold channel air outlets of the demisting filler unit. Therefore, the flowing length of the cold air in the cold dry airflow channel is obviously shortened, and the air resistance of the cold air channel can be effectively reduced, and the air volume and the flow rate of the cold air can be increased, the heat exchange coefficient is improved, and the demisting effect is improved.

In summary, by adopting the technical solutions as above, the demisting filler unit and the demisting cooling tower according to the invention have the following beneficial effects:

1. 1. Air dampers are arranged on the upper and lower sides of the cold air inlet channel of the demisting cooling tower, and the air dampers are all in vertical state (open position) in thermal operation mode (non-demisting operation mode). At this time, the hot humid air that flows upwards from the water spraying filler in the tower can pass cold air inlet channel and demisting filler unit simultaneously, and the demisting filler unit and cold air inlet channel are arranged evenly in the tower. The hot humid airflow will not be disturbed much when passing through the water spraying filler in the tower, and whole tower cooling effect is better.
2. 2. The cold air inlet channels are arranged at alternate in the demisting cooling tower, and the cold air inlet channels can greatly reduce the pressure drop in the tower in a thermal operation mode, for example, when the tower is operated in summer, because the resistance increased by adding a demisting layer is reduced by more than 50 percent.
3. 3. In the demisting filler unit according to the invention, the lower part of the heat exchange fin can be provided with the water deflecting and collecting structure, so that the overall structural strength of the demisting filler unit can be greatly improved; on the other hand, when the hot humid air passes through the water deflecting and collecting structure, the entrained micro droplets impact on the water deflecting and collecting structure, and the micro droplets are deflectd and captured under the action of inertia force and flow back into the tower by gravity, so that the water collecting and demisting effects of the water collecting and demisting filler are superior to those of a common tower water collector.
4. 4. In the demisting cooling tower according to the invention, the demisting filler unit has an great water collecting function, and meanwhile, the special double-cooling-channel air inlets are arranged on two sides of the demisting filler unit, so that the height of the whole tower is increased by only 1-2 meters compared with that of the conventional common tower technology, and the demisting effect is obviously improved.
5. 5. In the demisting cooling tower according to the invention, cold air and hot air after heat exchange leave from the top of the demisting filler layer, and can be quickly and uniformly mixed after leaving the demisting filler layer. No additional mixing space are needed at the upper part of the demisting cooling tower, and the height of the tower body can be further reduced.
6. 6. The demisting filler unit according to the invention can be provided with a horizontal bottom, so that the demisting filler layer can be conveniently and horizontally placed, the installation is easy, and the cost is low.
7. 7. The cold air inlet channel of the demisting cooling tower is provided with a rotary baffle of the air damper at the upper side and the lower side. In summer, the rotary baffle of the air damper is positioned at the vertical position, and the louver is closed, and the hot humid air is discharged out of the cooling tower by means of the hot humid air channel and the cold dry air channel of the demisting filler unit. In winter, the rotary baffle of the air damper is positioned at a horizontal position, and the louver is opened, and cold dry air enters a cold dry airflow channel of the demisting filler unit by means of the cold air inlet channel, and hot humid air enters a hot humid airflow channel of the demisting filler unit. The demisting cooling tower comprises two modes, i.e., a water collecting and demisting operation mode and a thermal operation mode. The demisting cooling tower can meet the requirements of different seasons respectively, and is flexible in operation.

The preferred embodiments of the invention have been described in detail above with reference to the accompanying drawings, but the invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple variations are possible, comprising the combination of the individual specific technical features in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should also be considered as disclosed in the invention, and all such modifications and combinations are intended to be included within the scope of the invention.