(19)
(11)EP 2 519 770 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
31.05.2017 Bulletin 2017/22

(21)Application number: 09812447.2

(22)Date of filing:  30.12.2009
(51)International Patent Classification (IPC): 
F23C 1/08(2006.01)
F23C 7/00(2006.01)
F23D 14/12(2006.01)
F23C 3/00(2006.01)
F23D 11/00(2006.01)
F23D 14/24(2006.01)
(86)International application number:
PCT/IT2009/000599
(87)International publication number:
WO 2011/080780 (07.07.2011 Gazette  2011/27)

(54)

BURNER AND COMBUSTION DEVICE COMPRISING SAID BURNER

BRENNER UND VERBRENNUNGSVORRICHTUNG MIT DIESEM BRENNER

BRÛLEUR ET DISPOSITIF DE COMBUSTION COMPRENANT LEDIT BRÛLEUR


(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

(43)Date of publication of application:
07.11.2012 Bulletin 2012/45

(73)Proprietor: Hysytech S.r.l.
10135 Torino (IT)

(72)Inventors:
  • ANTONINI, Massimiliano
    I-10064 Pinerolo (IT)
  • SALDIVIA, Andres
    I-10138 Torino (IT)
  • SARACCO, Guido
    I-10124 Torino (IT)
  • FARINA, Corrado
    I-10064 Pinerolo (IT)
  • SOLARO, Simone
    I-14055 Costigliole d'Asti (IT)
  • MORI, Marco
    I-10141 Torino (IT)
  • ANASTASI, Massimiliano
    I-10040 Rivalta di Torino (IT)

(74)Representative: Gervasi, Gemma et al
Notarbartolo & Gervasi S.p.A. Corso di Porta Vittoria 9
20122 Milano
20122 Milano (IT)


(56)References cited: : 
EP-A2- 0 510 783
GB-A- 2 004 052
US-A1- 2003 235 798
WO-A2-2005/071314
US-A- 3 576 384
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    FIELD OF THE INVENTION



    [0001] The present invention relates to a burner to be used in general to produce combustion devices having one or more combustion stages. The burner according to the invention can also be used as total burner to generate heat or as partial burner, for example in reforming processes, for generating combustible gases or hydrogen rich gases, or to power fuel cells.

    [0002] The present invention also relates to a multi-stage combustion device comprising a burner according to the invention.

    STATE OF THE ART



    [0003] As it is known, different types of burners exist and their structure is usually linked to the particular application for which they are destined. Burners can be used to produce complete combustion of a mixture formed by combustion air or fuel or, alternatively, they can be used as a combustion stage within multi-stage combustion devices. Normally, burners can be gaseous fuel (such as methane) or liquid fuel burners according to requirements.

    [0004] A first type of burner, including for example those normally used in boilers for domestic or industrial use, has the primary objective of heating, through the combustion flame, the fumes that strike coils or heat exchangers inside which a carrier fluid to be heated circulates. More precisely, in these applications, the burners are positioned in combustion chambers inside which the heat exchangers containing the carrier fluid are also positioned. This fluid is therefore heated partly through radiation by the combustion flame and partly through convection by the fumes produced by combustion which lick the outer surface of the heat exchangers.

    [0005] An example of burners of this type is described in the patent application EP1335163. More precisely, according to this solution, the burner comprises a device called LSV (large scale vortex) used as flame stabilizer. The burner has a structure formed of three concentric pipes. Combustion air is introduced into the innermost pipe and the outermost pipe, while the fuel is introduced into the central pipe in a ratio suitable to create a very lean mixture. The flame develops at the outlet of the central pipe at a widening of the section. The combustion products and excess air subsequently flow into a combustion chamber, on the wall of which there are disposed according to various geometries, and level with the outlet thereof, combustion nozzles for injection of further fuel, having orifices with a particular inclination. GB 2004052 discloses another related burner which comprises: a main body having a cylindrically shaped operating cavity which extends along an axial direction, said operating cavity being open at the downstream side and closed at the upstream side by a housing wall, first feed means to introduce a flow of a first reagent into said operating cavity in an intake position, said first feed means configuring a tangential intake of said first reagent in said operating cavity; second feed means to introduce a flow of a second reagent into said operating cavity in an intake position of said second flow and according to a direction parallel to said axial direction along which said operating cavity extends, wherein said operating cavity comprises a first portion between said intake position of said first reagent and said intake position of said second reagent, said first portion defining a stabilization chamber of the motion of said first reagent, said operating cavity comprising a second portion defining a combustion chamber downstream of said intake position of said second reagent. Although being relatively efficient from a functional viewpoint, burners of this type have technical limits deriving above all from the significant dimensions that distinguish their structure. Consequently, they are somewhat unsuitable for those applications in which generation and transmission of high thermal power in small or limited spaces is required, as may be the case, for example, in methane reforming plants or the like.

    [0006] In these operating conditions "radiant" burners have proved more efficient. More precisely, radiant burners are use in those circumstances where there must be no physical contact between combustion fumes and the material to be heated, thereby producing heat exchange entirely by radiation. From a constructional viewpoint, these burners usually comprise a linear or curved chamber, in which the fumes deriving from combustion circulate. More precisely, these burners are used in those circumstances where there must be no physical contact between combustion fumes and the material to be heated, thereby producing heat exchange entirely by radiation. The fumes deriving from combustion are evacuated directly from the burner and often their enthalpic content is exploited to pre-heat the air in order to increase the performance of the plant. In many solutions of this type the combustion reagents (this expression being intended as indicating the oxidizer and the fuel) are mixed before being introduced into the combustion chamber according to a swirling motion.

    [0007] The burners of this second type are accompanied by some drawbacks, a first of which is identified in the difficulty in controlling the flow rates. In other words, the composition of the mixture that reaches the combustion area varies continuously. This translates into poor flame stability due to the variable conditions of the mixture. Added to this drawback is the possibility of flash backs, especially in those cases in which the burner does not work in optimal operating conditions. This aspect is particularly critical in terms of safety. Another limit of conventional radiant burners lies in the fact that the radiant walls of the burner are not licked continuously and efficiently by the flame due to its poor stability. This naturally limits the efficiency of the burner as the thermal energy that can be transmitted by the burner through radiation is limited.

    [0008] On the basis of these considerations, the need emerges for new technical solutions that allow the drawbacks currently accompanying conventional radiant burners to be overcome. Therefore, the main aim of the present invention is to provide a burner that allows the aforesaid limits and drawbacks to be overcome. Within this aim, a main object is to provide a burner that is functionally versatile, or that can be used for different applications. Another object is to provide a burner of radiant type that allows the transmission of high thermal power deriving from stable and constant combustion. A further object of the present invention is to provide a burner which is compact, reliable and easy to manufacture at competitive costs.

    SUMMARY OF THE INVENTION



    [0009] The present invention relates to a burner comprising a main body provided with a substantially cylindrically shaped cavity which extends along an axial direction and which is open at least on a first side. The burner also comprises first feed means to introduce a flow of a first reagent into the operating cavity in an intake position of the first reagent. These first feed means are configured so as to define a tangential intake of the first reagent into the operating cavity. The burner also comprises second feed means to introduce a flow of a second reagent into said operating cavity in an intake position of said second reagent. Said second feed means are configured so as to introduce the second reagent according to a direction parallel to the axial direction.

    [0010] According to the invention, the operating cavity comprises a first portion between the intake position of the first reagent and the intake position of the second reagent. This first portion defines a stabilization chamber of the first reagent. The operating cavity also comprises a second portion that configures a combustion chamber downstream of the intake position of the second reagent or downstream of the stabilization chamber with respect to the direction in which the flow of second reagent extends. According to a preferred embodiment of the invention, the burner comprises combustion ignition means which are operatively positioned inside the operating cavity to ignite combustion between the two reagents.

    [0011] For the purposes of the present invention, the expression reagents is intended as indicating the oxidizer and the fuel that generate combustion. Therefore, in a first possible application of the burner, the flow of first reagent can be a flow of oxidizer, while the flow of second reagent will be a flow of fuel. In a second application the nature of the reagents can be inverted with respect to the previous case and more precisely the first flow of reagent will correspond to a flow of fuel, while the second flow of reagent can be a flow of oxidizer.

    [0012] It has been found that the presence of a stabilization chamber for flow of the first reagent allows flame conditions that are extremely stable and constant in time to be achieved. In fact, the distance between the intake positions for the two reagents allows precise adjustment of the flow rates, or a constant combustion stoichiometric ratio.

    [0013] From an operational viewpoint, the reagent that acts as oxidizer for combustion can be air or alternatively a mixture of gases. Analogously, the reagent that acts as fuel can be formed by a flow of combustible gas or, alternatively can be a liquid fuel.

    [0014] According to a further aspect of the present invention, the first portion of the operating cavity, which defines the stabilization chamber for the first reagent, has the same dimension of diameter as the second portion which defines the combustion chamber. It has been found that this solution allows optimization of the heating conditions of the walls delimiting the combustion chamber, or optimization of the radiation effect that can be obtained through these walls.

    [0015] According to a further aspect of the present invention, the burner comprises a lance for introducing the flow of second reagent. This lance comprises a portion outside the main body of the burner and a portion inside this main body which extends parallel to the axial direction in which the operating cavity extends. The position of the lance in substance defines the length of the first portion of the operating cavity, or the extension of the stabilization chamber. This extension can be adjusted if necessary, through appropriate means for adjustment of the axial position, as a function of the type of reagents used and as a function of the mass flows thereof in order to optimize combustion.

    [0016] According to another aspect of the present invention, the combustion ignition means are advantageously positioned inside the lance for intake of the second reagent. This solution is particularly advantageous as the ignition means in fact remain confined in an inert position from a fluid dynamic viewpoint, or in a position that does not obstruct on the one hand stabilization of the flow of the first reagent and on the other propagation of the flame.

    [0017] The present invention also relates to a combustion device that is characterized in that it comprises a burner according to the present invention. According to a possible embodiment, the combustion device according to the invention comprises a first combustion stage defined by a burner according to the present invention and a second combustion stage defined by a further combustion chamber into which the combustion products produced by the burner flow. Preferably, the combustion device comprises further feed means to introduce a flow of oxidizer into said further combustion chamber.

    LIST OF FIGURES



    [0018] Further features and advantages of the present invention shall be apparent from the description of particular embodiments of the present invention illustrated by way of non-limiting example in the accompanying drawings, wherein:
    • Fig.1 is a perspective view of a first embodiment of a burner according to the present invention;
    • Figs. 2 and 3 are respectively a front view and a side view of the single-stage burner of Fig. 1;
    • Fig.4 is a sectional view according to the line IV-IV of Fig.1;
    • Fig. 5 is a perspective view of a second embodiment of a burner according to the present invention;
    • Fig. 6 is a side view of the burner of Fig. 5;
    • Fig. 7 is a longitudinal sectional view of the burner of Fig. 5;
    • Fig. 8 is a perspective view of a combustion device with two combustion stages comprising the burner of Fig. 1;
    • Fig. 9 is a longitudinal sectional view of the device of Fig. 8;
    • Fig. 10 is a perspective view of a further combustion device with two combustion stages comprising the burner of Fig. 5;
    • Fig.11 is a side view of the combustion device of Fig. 8.

    DETAILED DESCRIPTION



    [0019] With reference to the aforesaid figures, the burner 1 according to the invention comprises a main body comprising a substantially cylindrically shaped operating cavity 11 which extends according to an axial direction X. The operating cavity 11 is open at least on a first side so as to be in communication with the environment outside the main body. More precisely, in the case illustrated the operating cavity 11 is delimited on a second side thereof, opposite the first, by a housing wall 12.

    [0020] The burner 1 according to the invention comprises first combustion feed means to introduce a flow of a first reagent into the operating cavity 11 in an intake position of said first reagent (indicated with the reference P1 and hereafter also with the expression "first position P1"). More precisely, the first feed means are structured so as to configure a tangential intake of the flow of first reagent in the operating cavity 11. In other words, they configure a flow for the first reagent which enters the cavity 11 according to a direction tangent to the cross section of this cavity.

    [0021] The burner 1 also comprises second feed means configured to introduce a flow of second reagent C into the operating cavity 11 in an intake position of said second reagent (indicated with the reference P2 and hereafter also with the expression "second position P2"). More precisely, these second feed means configure an axial flow of fuel inside the operating cavity 11.

    [0022] According to the invention, the operating cavity 11 comprises a first portion 11A, between the intake position P1 of said first reagent AC and the intake position P2 of said second reagent. This first portion 11A forms a stabilization chamber of the first reagent introduced through the first feed means. The operating cavity 11 also comprises a second portion 11B, in communication with the first portion 11A, which defines a combustion chamber downstream of the intake position P2 of the second reagent with respect to the axial direction of flow of this second reagent. For the purposes of the description, the expression "stabilization chamber 11A" will be used to indicate the first portion 11A, and the expression "combustion chamber 11 B" will be used to indicate the second portion 11 B.

    [0023] Figures 1 to 4 relate to an embodiment of a burner in which the first reagent is combustion air and the second reaction is gaseous fuel such as methane. Hereafter, purely to simplify the description, the reagent that acts as "oxidizer" will always be considered as first reagent and the one that acts as "fuel" as second reagent". However, the scope of the invention also includes the possibility of inverting the intake position of the fuel and of the oxidizer in the operating cavity 11. From an operating viewpoint, the burner 1 can also use a flow of air or, alternatively, a gaseous mixture, as oxidizer. Either gaseous fuel or liquid fuel can instead be used as fuel.

    [0024] With reference, for example, to the sectional view of Fig. 4, the main body is formed of a tubular element 10 which extends along an axial direction X with an operating cavity 11 which extends substantially for the entire length thereof. The tubular element 10 can be made of steel, copper or other metal material according to the type of application for which the burner 1 is destined. The use of a tubular element 10 of this type has proved to be particularly useful as it allows the burner 1 to be advantageously used as linear radiant element. The heat generated by combustion can be transferred radially through the walls of the tubular element 10 to a mass (fluid, gaseous liquid or solid) arranged around this tubular element. In a first possible application, for example, the heat can be transferred through the tubular element 10 to a fluid mass that licks the outside of the element. In a second possible application, the heat can be transferred, through the walls of the tubular element 10, to a solid metal mass usable, for example, as thermal wheel in an evaporator. In a further application, the heat can be transferred by conduction to a heat exchanger welded to the outer surface of the tubular element 10.

    [0025] Again with reference to Fig. 4, purely to simplify the description, the operating cavity 11 has a constant diameter for the entire length thereof. In other words, the stabilization chamber 11A and the combustion chamber 11 B have the same diametric extension. It has been found that this solution advantageously stabilizes the combustion flame while simultaneously allowing it to adhere uniformly to the walls, permitting more effective and uniform heating of the walls of the tubular element 10. Simultaneously, the constant section along the longitudinal axis X defines for the burner 1 a particularly compact configuration and therefore adaptable to different types of application. In other words, the linear shape of the burner advantageously increases the number of possible spheres of application.

    [0026] Again with reference to the sectional view of Fig. 4, the housing wall 12 delimiting the operating cavity 11 is defined by a cap element 13 connected permanently to one end of the tubular element 10. In the solution illustrated the first feed means comprise a feed duct 20, connected to the tubular element 10, which is in communication on the one side with a source (not shown in the figures) from which the flow of first reagent, in this case combustion air AC, derives. This source could comprise, for example, a blower or alternatively a compressed air duct or any other system capable of providing the flow rate of combustion air AC required at the pressure necessary to overcome the load losses and thus allow correct operation of the burner 1.

    [0027] The feed duct 20 is in communication on the opposite side with the operating cavity 11 through an opening 8 whose position in substance defines the intake position P1 of the flow of combustion air AC (first reagent) into the cavity or into the stabilization chamber 11 defined thereby. As illustrated, the position of the opening 8 is substantially adjacent to the housing wall 12 so as to oblige the entire flow of combustion air to move in the direction of the combustion chamber 11 B. In the case illustrated in Figs. 1 to 4, the feed duct 20 extends according to a direction parallel to that of the longitudinal axis, but could also extend according to another direction, for example orthogonally to this longitudinal axis, as shown by the broken line in Fig. 2.

    [0028] With reference to Figs. 3 and 4, the second feed means comprise a lance element 30 for intake of the second reagent, which in the case illustrated is defined by gaseous fuel. This lance element 30 extends through the cap element 13 and is preferably connected thereto. More precisely, the lance element 30 is inserted in a hole passing through the cap element 13 so as to emerge with a first portion 30A inside the operating cavity 11. The lance element 30 comprises a second portion 30B outside the tubular element 10. This second portion 30B is in communication, for example through a supply pipe 31, with a fuel source, not shown in the figures, which can, for example, be a bottle of methane or other pressurized gaseous fuel.

    [0029] As clearly illustrated, the first portion 30A of the lance element 30 is substantially coaxial with the operating cavity 11 and terminates with an emission end 33 through which the fuel C exits. The axial extension of this first portion 30A in practice defines the axial extension of the stabilization chamber as it stabilizes the distance between the intake position P1 of the first reagent (combustion air in the case illustrated) and the intake position P2 of the second reagent (fuel in the case illustrated). It has been found that excellent results in terms of combustion stability are obtained, given the same reagents used, when the ratio between the distance LT of the intake positions (or the distance between the position P1 and the position P2) and the internal diameter D of the stabilization chamber 11A (or of the first portion 11A) is comprised within an interval of values between 1 and 10. It has also been found that optimal results in terms of combustion stability are achieved when the ratio between the length LT of the first portion 11A and the length L of the second portion 11 B is comprised within an interval of values between 0.1 and 2. Moreover, it has been found that particularly favorable combustion conditions are achieved when the ratio between internal diameter D of the stabilization chamber and diameter D1 of the first portion 30A of the lance element 30 is contained within an interval of values between 2 and 10.

    [0030] In the case illustrated in the figures, the combustion ignition means comprise a spark igniter 40 arranged inside the lance element 30. More precisely, the spark igniter 40 comprises a central body 40A, made of insulating material, arranged coaxially inside the lance element 30 and connected by a first part to an electrical source (not shown) through an electrical connection plug 39. The opposite part of the central body 40A comprises an ignition end 40B, also called tip, which emerges with respect to the fuel delivery end 33 of the lance element. This emerging position of the tip allows the spark to strike in a region in which flammable mixture is undoubtedly present.

    [0031] Figs. 5 to 7 relate to a second embodiment of the burner 1 according to which it is supplied with liquid fuel. With reference, for example, to Fig. 5, it can be seen that the main body of the burner is also in this case composed of a tubular element 10 made of metal material closed at one end by a cap element delimiting on the one side the operating cavity 11. The first feed means are configured so as to allow tangential intake into the operating cavity 11 of an air flow according to a method substantially analogous to the one provided for in the previous case. With reference to the sectional view of Fig. 7, the second feed means comprise also in this case a central lance 30 which is closed at the end through a closing element 65 which forms a nozzle 66 through which the flow of second reagent (in this case the fuel C) exits substantially in axial direction. The axial position of the nozzle 66 in substance defines the intake position P2 of the second reagent. In particular, the liquid fuel reaches the nozzle 66 through a feed circuit 68 which can also comprise a heater 70 (see, for example, Fig. 6) to take the fuel to the temperature and pressure conditions necessary to make it vaporize, after having passed through the nozzle 66, in the operating cavity 11 of the tubular element 10.

    [0032] As illustrated in Fig. 7, in this second embodiment of the burner 1 the sparking means are substantially the same as those provided in the case of the burner with gaseous fuel. In particular, in this embodiment, adjustment means 73 are provided to adjust the axial position of the lance 30. More precisely, these means allow adjustment of the depth of insertion of the lance 30 in the operating cavity 11 within a certain interval so as to optimize operation of the lance according to the fuel used. In other words, these adjustment means 73 of the axial position allow, according to the type of reagents, selection of the most suitable position in which to strike the spark.

    [0033] With reference to Figs. 8 to 11, the present invention also relates to a combustion device 5 comprising a burner 1 according to the present invention More precisely, it relates to a multi-stage combustion device 5 wherein the first combustion stage is produced through a burner 1 with gaseous or liquid fuel according to the description above. In other words the burner 1 in this application is used to produce partial combustion that will subsequently be completed in the various combustion stages of the device 5. Partial combustion, with respect to total combustion, is achieved by varying the combustion air/fuel ratio substantially without any change to the structure of the burner. The combustion device 5 according to the invention could be used, for example, as first stage of a multi-stage combustion system or alternatively it could be used for hydrocarbon reforming.

    [0034] Fig. 8 is a perspective view of a combustion device 5 according to the invention which comprises a gaseous fuel burner. As illustrated, the device 5 comprises a housing liner 50, positioned inside which is at least part of the tubular element 10 defining the operating cavity 11, or the combustion chamber 11A of the burner 1 in which the first combustion stage is produced (hereinafter also indicated as primary combustion chamber 11A). The volume between the housing liner 50 and the part of the burner 1 contained therein defines a second combustion chamber 18 in which the second combustion stage is produced. For this reason, this chamber will also be indicated with the expression secondary combustion chamber 18.

    [0035] With reference to Fig. 9, the housing liner 50 has a substantially cylindrical shape extending between a first transverse wall 51 and a second transverse wall 52 opposite the first. These walls 51, 52 extend in a substantially transverse manner to the longitudinal direction X defined above. The tubular element 10 of the burner 1 is positioned at least partly inside the housing liner 50 through the first wall 51 so that the primary combustion chamber 11 B is substantially coaxial with the housing liner 50 or with the secondary combustion chamber 18. As can be seen, the tubular element 10 is distanced from the second wall 52 so that the combustion products delivered from the primary combustion chamber 11A can be released inside the secondary combustion chamber 18.

    [0036] The first wall 51 of the housing liner 50 comprises a discharge opening 55 to discharge products deriving from the second combustion. In particular, in the solution illustrated the discharge opening 55 is coaxial with the housing liner 50 or with the tubular element 10 of the burner 1. The combustion device 5 can advantageously comprise a conveying element 58 to convey the products of the second combustion. In the case illustrated, the conveying element 58 comprises a discharge outlet 59 connectable, through a flange element 59B, to an evacuation duct, not shown in the figures. According to requirements, these products can be conveyed to a further combustion stage of the combustion device 5 or inside another device. Alternatively, the combustion products could be released directly into the atmosphere if their temperature is sufficiently low.

    [0037] Figs. 10 and 11 relate to a second embodiment of a combustion device 5 according to the position that differs from the previous one through the use of a liquid fuel burner 1. From comparing Figs. 8 and 9, it can be understood that in tne two embodiments of the combustion device 5 the structure thereof is substantially identical with obvious advantages from the viewpoint of manufacturing costs. Naturally, the dimensions of the two devices are established as a function of the type of fuel to be used and of the operating conditions required.

    [0038] The technical solutions adopted for the burner allow the aims and objects set to be fully achieved. In particular, the burner according to the invention has high functional versatility, which makes it suitable for use in different applications. In particular, it can be used for partial or total combustion or, alternatively, as heating element of heat carrying fluids or solid masses. The structure of the burner according to the invention allows it to be used to produce particularly compact and efficient multistage combustion devices with extremely limited manufacturing costs.

    [0039] The burner and the combustion device thus conceived are susceptible to numerous modifications and variants, all falling within the scope of the inventive concept; moreover all details can be replaced by other technically equivalent details.

    [0040] In practice, the materials used and the contingent dimensions and forms can be any, according to requirements and to the state of the art.


    Claims

    1. A burner (1) for producing a combustion device (100), wherein said burner (1) comprises:

    - a main body comprising a substantially cylindrically shaped operating cavity (11) which extends along an axial direction (X) having the same diametrical dimension, said operating cavity being open at least on a first side, and closed on the other side by a housing wall (12)

    - first feed means to introduce a flow of a first reagent into said operating cavity (11) in an intake position of said first reagent (P1), said first feed means (20) configuring a tangential intake of said first reagent in said operating cavity (11);

    - second feed means to introduce a flow of a second reagent into said operating cavity (11) in an intake position (P2) of said second flow, said second feed means introducing said flow of second reagent according to a direction substantially parallel to said axial direction (X) along which said operating cavity (11) extends, said second feed means (30) comprises a lance (30) which extends through said housing wall (12) of said main body, said lance (30) comprising a portion (30B) outside said main body and a portion (30A) inside said main body and coaxial with said operating cavity (11), and combustion ignition means arranged inside said lance

    wherein said operating cavity (11) comprises a first portion (11 A) between said intake position (P1) of said first reagent and said intake position (P2) of said second reagent, said first portion defining a stabilization chamber of the motion of said first reagent, said operating cavity (11) comprising a second portion (11 B) defining a combustion chamber downstream of said intake position (P2) of said second reagent.
     
    2. The burner (1) according to claim 1, wherein said intake position of said first reagent (P1) is substantially adjacent to said housing wall (12) which delimits said operating cavity (11).
     
    3. The burner (1) according to claim 1, wherein the ratio between the length of said first portion (11A) and the length of said second portion (11 B) falls within an interval between 0.1 and 2.
     
    4. The burner (1) according to claim 1, wherein the ratio between the length of said first portion (11A) and the internal diameter of the operating cavity falls within an interval between 1 and 10.
     
    5. The burner (1) according to any one of claims 1 to 4, wherein said main body is formed by a tubular element made of metal material.
     
    6. A combustion device (5) which comprises a burner according to one or more of claims 1 to 5.
     
    7. The combustion device (5) according to claim 6, wherein said device (5) comprises a first combustion stage produced through said burner (1) and a second combustion stage defined by a further combustion chamber (18) into which the combustion products produced by said burner (1) flow, said device (5) comprising further feed means to introduce combustion air into said further combustion chamber (18).
     
    8. The combustion device (5) according to claim 7 wherein said further combustion chamber (18) is defined by a housing liner (50), inside which at least part of said main body of said burner (1) is positioned, said housing liner (50) having a substantially cylindrical shape and extending longitudinally between a first wall (51) and a second wall (52) opposite the first, said burner (1) being positioned, through said first wall (51), so that said operating cavity (11) of said main body is substantially coaxial with said housing liner (50).
     
    9. The combustion device (5) according to claim 8, wherein said first wall (51) of said housing liner (50) comprises a discharge opening (55) to discharge the products deriving from said second combustion.
     
    10. The combustion device (5) according to claim 9, wherein said discharge opening (55) is coaxial with said housing liner (50), said device (5) comprising a conveying element (58) to convey the combustion products delivered through said discharge opening (51).
     
    11. Use of a burner (1) according to any of the claims 1 to 5, wherein said first reagent is an oxidizer and wherein said second reagent is a fuel.
     
    12. Use of a burner (1) according to any of the claims 1 to 5, wherein said first reagent is combustion air and wherein said second reagent is liquid or gaseous fuel.
     
    13. Use of a burner (1) according to any of the claims 1 to 5, wherein said first reagent is a fuel and wherein said second reagent is an oxidizer.
     


    Ansprüche

    1. Brenner (1) zum Herstellen einer Verbrennungsvorrichtung (100), wobei der Brenner (1) umfasst:

    - einen Hauptkörper, der einen im Wesentlichen zylindrisch geformten Arbeitshohlraum (11) aufweist, der sich entlang einer axialen Richtung (X) mit der gleichen Durchmesserabmessung erstreckt, wobei der Arbeitshohlraum zumindest auf eine ersten Seite geöffnet und auf der anderen Seite durch eine Gehäusewand (12) verschlossen ist,

    - ein erstes Einspeisemittel zum Einleiten einer Strömung eines ersten Reagens in den Arbeitshohlraum (11) in einer Einlassposition des ersten Reagens (P1), wobei das erste Einspeisemittel (20) einen Tangentialeinlass des ersten Reagens in den Arbeitshohlraum (11) bildet;

    - ein zweites Einspeisemittel zum Einleiten einer Strömung eines zweiten Reagens in den Arbeitshohlraum (11) in einer Einlassposition (P2) der zweiten Strömung, wobei das zweite Einspeisemittel die Strömung des zweiten Reagens gemäß einer Richtung im Wesentlichen parallel zu der axialen Richtung (X), entlang welcher sich der Arbeitshohlraum (11) erstreckt, einleitet, wobei das zweite Einspeisemittel (30) eine Lanze (30) umfasst, die sich durch die Gehäusewand (12) des Hauptkörpers erstreckt, wobei die Lanze (30) einen Abschnitt (30B) außerhalb des Hauptkörpers und einen Abschnitt (30A) innerhalb des Hauptkörpers und koaxial mit dem Arbeitshohlraum (11) aufweist, und Verbrennungszündungsmittel innerhalb der Lanze angeordnet sind,

    wobei der Arbeitshohlraum (11) einen ersten Abschnitt (11 A) zwischen der Einlassposition (P1) des ersten Reagens und der Einlassposition (P2) des zweiten Reagens umfasst, wobei der erste Abschnitt eine Stabilisierungskammer der Bewegung des ersten Reagens definiert, wobei der Arbeitshohlraum (11) einen zweiten Abschnitt (11 B) umfasst, der stromabwärts von der Einlassposition (P2) des zweiten Reagens eine Brennkammer definiert.
     
    2. Brenner (1) nach Anspruch 1, wobei die Einlassposition des ersten Reagens (P1) im Wesentlichen benachbart zu der Gehäusewand (12) ist, die den Arbeitshohlraum (11) begrenzt.
     
    3. Brenner (1) nach Anspruch 1, wobei das Verhältnis zwischen der Länge des ersten Abschnitts (11A) und der Länge des zweiten Abschnitts (11 B) in ein Intervall zwischen 0,1 und 2 fällt.
     
    4. Brenner (1) nach Anspruch 1, wobei das Verhältnis zwischen der Länge des ersten Abschnitts (11A) und dem Innendurchmesser des Arbeitshohlraums in ein Intervall zwischen 1 und 10 fällt.
     
    5. Brenner (1) nach einem der Ansprüche 1 bis 4, wobei der Hauptkörper durch ein rohrförmiges Element gebildet ist, das aus einem Metallmaterial hergestellt ist.
     
    6. Verbrennungsvorrichtung (5), die einen Brenner nach einem oder mehreren der Ansprüche 1 bis 5 umfasst.
     
    7. Verbrennungsvorrichtung (5) nach Anspruch 6, wobei die Vorrichtung (5) eine erste Brennstufe umfasst, die durch den Brenner (1) erzeugt ist, und eine zweite Brennstufe, die durch eine weitere Brennkammer (18) definiert ist, in welche die Verbrennungsprodukte, die durch den Brenner (1) erzeugt werden, strömen, wobei die Vorrichtung (5) ferner ein Einspeisemittel umfasst, um Verbrennungsluft in die weitere Brennkammer (18) einzuleiten.
     
    8. Verbrennungsvorrichtung (5) nach Anspruch 7, wobei die weitere Brennkammer (18) durch eine Gehäusebuche (50) definiert ist, innerhalb welcher zumindest ein Teil des Hauptkörpers des Brenners (1) angeordnet ist, wobei die Gehäusebuchse (50) eine im Wesentlichen zylindrische Form aufweist und sich in Längsrichtung zwischen einer ersten Wand (51) und einer zweiten Wand (52) gegenüber der ersten erstreckt, wobei der Brenner (1) durch die erste Wand (51) hindurch angeordnet ist, so dass der Arbeitshohlraum (11) des Hauptkörpers im Wesentlichen koaxial mit der Gehäusebuchse (50) ist.
     
    9. Verbrennungsvorrichtung (5) nach Anspruch 8, wobei die erste Wand (51) der Gehäusebuchse (50) eine Austragsöffnung (55) umfasst, um die Produkte, die aus der zweiten Verbrennung herrühren, auszutragen.
     
    10. Verbrennungsvorrichtung (5) nach Anspruch 9, wobei die Austragsöffnung (55) koaxial mit der Gehäusebuchse (50) ist, wobei die Vorrichtung (5) ein Förderelement (58) umfasst, um die Verbrennungsprodukte, die durch die Austrittsöffnung (51) abgegeben werden, zu befördern.
     
    11. Verwendung eines Brenners (1) nach einem der Ansprüche 1 bis 5, wobei das erste Reagens ein Oxidationsmittel ist, und wobei das zweite Reagens ein Brennstoff ist.
     
    12. Verwendung eines Brenners (1) nach einem der Ansprüche 1 bis 5, wobei das erste Reagens Verbrennungsluft ist, und wobei das zweite Reagens ein flüssiger oder gasförmiger Brennstoff ist.
     
    13. Verwendung eines Brenners (1) nach einem der Ansprüche 1 bis 5, wobei das erste Reagens ein Brennstoff ist, und wobei das zweite Reagens ein Oxidationsmittel ist.
     


    Revendications

    1. Brûleur (1) pour produire un dispositif de combustion (100), dans lequel ledit brûleur (1) comprend :

    - un corps principal comprenant une cavité opérationnelle de forme sensiblement cylindrique (11) qui s'étend le long d'une direction axiale (X) ayant la même dimension diamétrale, ladite cavité opérationnelle étant ouverte au moins sur un premier côté, et fermée sur l'autre côté par une paroi de logement (12) ;

    - des premiers moyens d'alimentation pour introduire un flux d'un premier réactif dans ladite cavité opérationnelle (11) dans une position d'admission dudit premier réactif (P1), lesdits premiers moyens d'alimentation (20) configurant une admission tangentielle dudit premier réactif dans ladite cavité opérationnelle (11) ;

    - des seconds moyens d'alimentation pour introduire un flux d'un second réactif dans ladite cavité opérationnelle (11) dans une position d'admission (P2) dudit second flux, lesdits seconds moyens d'alimentation introduisant ledit flux de second réactif selon une direction sensiblement parallèle à ladite direction axiale (X) le long de laquelle s'étend ladite cavité opérationnelle (11), lesdits seconds moyens d'alimentation (30) comprennent une lance (30) qui s'étend le long de ladite paroi de logement (12) dudit corps principal, ladite lance (30) comprenant une partie (30B) à l'extérieur dudit corps principal et une partie (30A) à l'intérieur dudit corps principal et coaxiale avec ladite partie opérationnelle (11), et des moyens d'allumage par combustion agencés à l'intérieur de ladite lance

    dans lequel ladite cavité opérationnelle (11) comprend une première partie (11A) entre ladite position d'admission (P1) dudit premier réactif et ladite position d'admission (P2) dudit second réactif, ladite première partie définissant une chambre de stabilisation du mouvement dudit premier réactif, ladite cavité opérationnelle (11) comprenant une seconde partie (11B) définissant une chambre de combustion en aval de ladite position d'admission (P2) dudit second réactif.
     
    2. Brûleur (1) selon la revendication 1, dans lequel ladite position d'admission dudit premier réactif (P1) est sensiblement adjacente à ladite paroi de logement (12) qui délimite ladite cavité opérationnelle (11).
     
    3. Brûleur (1) selon la revendication 1, dans lequel le rapport entre la longueur de ladite première partie (11A) et la longueur de ladite seconde partie (11B) se trouve dans un intervalle entre 0,1 et 2.
     
    4. Brûleur (1) selon la revendication 1, dans lequel le rapport entre la longueur de ladite première partie (11A) et le diamètre interne de la cavité opérationnelle se trouve dans un intervalle entre 1 et 10.
     
    5. Brûleur (1) selon l'une quelconque des revendications 1 à 4, dans lequel ledit corps principal est formé par un élément tubulaire constitué de matériau métallique.
     
    6. Dispositif de combustion (5) qui comprend un brûleur selon une ou plusieurs des revendications 1 à 5.
     
    7. Dispositif de combustion (5) selon la revendication 6, dans lequel ledit dispositif (5) comprend un premier étage de combustion produit à travers ledit brûleur (1) et un second étage de combustion défini par une autre chambre de combustion (18) dans laquelle s'écoulent les produits de combustion produits par ledit brûleur (1), ledit dispositif (5) comprenant en outre des moyens d'alimentation pour introduire de l'air de combustion dans ladite autre chambre de combustion (18).
     
    8. Dispositif de combustion (5) selon la revendication 7, dans lequel ladite autre chambre de combustion (18) est définie par une chemise de logement (50) à l'intérieur de laquelle est positionnée au moins une partie dudit corps principal dudit brûleur (1), ladite chemise de logement (50) ayant une forme sensiblement cylindrique et s'étendant longitudinalement entre une première paroi (51) et une seconde paroi (52) à l'opposé de la première, ledit brûleur (1) étant positionné à travers ladite première paroi (51), de sorte que ladite cavité opérationnelle (11) dudit corps principal est sensiblement coaxiale avec ladite chemise de logement (50).
     
    9. Dispositif de combustion (5) selon la revendication 8, dans lequel ladite première paroi (51) de ladite chemise de logement (50) comprend une ouverture de décharge (55) pour décharger les produits dérivés de ladite seconde combustion.
     
    10. Dispositif de combustion (5) selon la revendication 9, dans lequel ladite ouverture de décharge (55) est coaxiale avec ladite chemise de logement (50), ledit dispositif (5) comprenant un élément d'acheminement (58) pour acheminer les produits de combustion délivrés à travers ladite ouverture de décharge (51).
     
    11. Utilisation d'un brûleur (1) selon l'une quelconque des revendications 1 à 5, dans laquelle ledit premier réactif est un oxydant et dans laquelle ledit second réactif est un combustible.
     
    12. Utilisation d'un brûleur (1) selon l'une quelconque des revendications 1 à 5, dans laquelle ledit premier réactif est de l'air de combustion et dans laquelle ledit second réactif est un liquide ou combustible gazeux.
     
    13. Utilisation d'un brûleur (1) selon l'une quelconque des revendications 1 à 5, dans laquelle ledit premier réactif est un combustible et dans laquelle ledit second réactif est un oxydant.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description