AN ARRANGEMENT FOR DRYING NATURAL MANURE AND THE LIKE

Description

[0001] The present invention relates to an arrangement for preventing material which is to be dried from adhering to a base part in a drying apparatus according to the precharacterizing part of claim 1.

[0002] The document DE-C-593 362 discloses a scraper arm that can be lifted and lowered as a hole without pivoting. It comprises a plurality of blades, which are vertical movably supported between guide plates. To a certain extend, this device enables the scraper arm to be adapted to the changing surface of the base part taking place to compensate the temperature differences existing in the various regions of the drying apparatus.

[0003] If the changing of the surface of the base part exceeds a certain range, its compensation by the device according to DE-C-593 362 is no longer possible, because there exists a comparable small maximum difference in horizontal level of one radius that might be compensated by the vertical movable blades. Said maximum level difference is determined by the vertical size of the single blades, which cannot be very large because they must move against the resistance of the material to be dried.

[0004] It is therefore an object of the present invention to.create a stirring device including a scraper arm, that is in a position to maintain its function in a satisfactory degree, even if the changement in the surface of the base part exceeds usual ranges due to abnormal temperature differences.

[0005] This object is achieved by the features of the characterizing part of claim 1. The stirring device, which is connected to the drive axle so as to be moved over the base part, is formed of two elements, which are movable relative to each other, namely, the preferably tubular sleeve holder, which houses the arm part of the scraper arm being equipped with the adjustable blade at a portion outside the sleeve holder, so that the scraper arm is in a position to carry out vertical pivoting movements and can also be lifted and lowered as a hole without pivoting, due to the fact that the scraper arm is mounted in the holder sleeve via the arm part at two axially spaced mounting points where it can be acted upon by two devices which both might strive to lift it up and swing it down.

[0006] The document SE-B-419 372 discloses a stirring device including a scraper arm having the ability of carrying out vertical pivoting movements, but it lacks the ability of being lifted or lowered as a whole without pivoting, whereby the adaptability to the changing of the surface is insufficient compared to the invention.

[0007] Further advantages of the invention result from the features in the dependent claims.

[0008] The invention is described in the following with reference to the accompanying drawings, wherein

Fig. 1 is a perspective view looking obliquely from above onto a drying plant in which the stirring device according to the invention is preferably to be used,

Fig. 2 is a perspective view from the same direction, with certain parts of the appliance cut away for the sake of clarity,

Fig. 3 is a perspective view of a stirring device arranged inside the appliance, with certain parts cut away for the sake of clarity,

Fig. 4 is a corresponding perspective sectional view of a part of the stirring device shown in Fig. 3, on a larger scale, and

Fig. 5 is a schematic plan view of the arrangement viewed substantially in a horizontal section through the lower chamber.

[0009] The arrangement shown on the drawings consists of a vessel which is designated 1 as a whole and the inner volume of which is divided into an upper chamber 3 and a lower chamber 4 by means of a horizontal intermediate base 2. The top 5 of the upper chamber has an aperture 6 for introducing moist manure, and also a central aperture 7 through which there passes a drive axle 8 for a stirring device 9 disposed in the upper chamber, which can move over the upper surface of the intermediate base 2. The feed inlet aperture 6 can be closed by means of a pivoting door 10, the movement path of which is indicated with a double arrow 11. At the bottom of the upper chamber there is another aperture 12 for extracting the dried material. This aperture can be closed by means of two flaps 13 which are fixed in the intermediate base by means of hinges and the movement path of which is indicated by the two arrows 14. The lower chamber is divided into two sections A and B which are separated by means of a first vertical wall 15 which extends from the outer wall 16 of the chamber to a post 17 in its centre, and also by a further vertical wall 18 which extends from the central post 17 radially towards a part of the chamber wall 16 located on the other side of the discharge aperture 12. Between the vertical wall 18 and the chamber wall there is a through-flow opening 19 for air flowing in through a hole 20 in the wall in the vicinity of the dividing wall 15, the flow path of this air will be described later, in more detail. An outflow hole 21 is arranged on the other side of the dividing wall 15. Furthermore, in the wall of the lower chamber some way from the outflow hole 21 there is a further outflow hole 22, the function of which will be described later. 23 designates a burner for heating up a gaseous medium flowing into the chamber 4. 24 designates an air supply fan which communicates with the burner 23 via a pipeline 25 and a heat-exchanger 26. The space 27 inside the heat-exchanger 26 is in communication with the outlet hole 22 in the chamber 4 via a pipeline 28, and is also in communication with the external air via a pipeline 29. 30 designates a fan which is in communication with the inlet hole 20 via a pipeline 31 and is also in communication with the outlet hole 21 via a pipeline 32, as well as being in communication via a pipeline 33 with an outer pipe 34 through which there passes the section 25a of the pipeline 25 which is disposed after the burner 23. An enclosing space 35 is therefore formed between the pipeline section 25a and the pipe 34. The mouth 25b of the pipeline 25 is located slightly nearer the burner than the mouth 34a of the tube 34. In the embodiment shown the mouth 34a is located inside the chamber 4. At the end located nearest to the burner the pipe 34 is closed off by means of an annular end-piece 34b. The burner 23 may be oil-operated, for example, but other types of fuel are of course also possible without thereby deviating from the basic concept of the invention. The upper chamber 3 communicates via a pipeline 36 with a condenser 37 in which gases given off during the drying process are condensed. 38 designates an inlet line and 39 a return line for water which is conducted to and away from the condenser 37, respectively. 40 designates an outlet line for condensate and 41 designates a gas outlet line connected to the condenser, which opens out in the fresh air inlet 42 for the fan 24. 43 designates an electricity supply line for the fan 24. The upper end of the drive axle 8 is connected to a hydraulic motor 44 disposed at the top, which is driven by a hydraulic fluid pump 45 which communicates with the hydraulic motor via line 46. The pipeline 36 terminates at the roof of the upper chamber 3 in an outlet connection 47.

[0010] Moisture-containing material intended for drying is introduced into the upper chamber 3 via the inlet aperture 6, after which the latter is closed. With the aid of the burner 23 the lower chamber 4 is then heated up and heat is transferred to the upper chamber 3 via the intermediate base 2, with simultaneous stirring by means of the stirring device 9 extending radially from the central axle 8, the construction of this device will be described in more detail below. The stirring device 9 scrapes against the base 2 of the upper chamber 3 and keeps it free from burnt-on material. Vapour which is given off by the drying material is conducted via the pipe connection 47 and the pipeline 36 to the condenser 37 where the vapour is condensed when it makes contact with parts of the condenser through which there flows the cooling medium flowing through the pipelines 38 and 39. Condensate, which may be ammonia, amongst other things, is conducted away from the condenser via the pipeline 40. Gases which are not condensed flow out of the condenser via the pipeline 41 and mix with fresh air in the inlet nozzle 42. The air/gas mixture obtained is forced via the fan 24 and the pipeline 25 through the heat-exchanger 26 where it is pre-heated, and then past the burner flame 23a where further heating to the desired temperature takes place. Combustible gases flowing away from the condenser take part here in the combustion process and contribute to the heating of the plant. After this, the heated gas flows further on through the hole 22, the pipeline 28, heat-exchanger 26 and out into the open via pipeline 29. A large part of the heat contained in the gases flowing out is therefore transferred to the incoming gas/air stream in the heat-exchanger 26. Furthermore, the arrangement has an internal circulation system which is operated by circulation fan 30 which has the pipeline 32 connected to the outlet hole 21 connected to its inlet side. Some of the gas located in the chamber part A is therefore extracted via the hole 21 and the pipeline 32, after which some of this extracted gas is fed via the fan 30 into the chamber part B and circulates back to the chamber A via the opening 19. Another portion of the extracted gas is conducted via the line 33 to the surrounding space 35 around the central pipeline 25a in the burner system and on into the heating chamber 4 via inlet hole 34a after the gas flowing through the pipeline 33 has been blended with the gas flowing through the pipeline 25 in the terminal section of the pipe 34. The gas flowing via the pipeline 33 from the heating chamber 4 thereby cools the parts located nearest to the burner and prevents them from being burnt away. Due to the fact that the burner is distanced so that it is located some way from the drying container and since the circulation air is conducted in on the outside of the burner pipe 25a at the same time as the fan 30 circulates hot air inside the chamber 4, very even heating of the intermediate base is obtained, which means that it stays relatively flat and material intended for drying is moreover prevented from burning onto certain parts of the intermediate base. Due to the new circulation system a very high capacity relative to the volume of the vessel is also obtained, compared with previously-known arrangements of this type. When during is completed the doors 13 are opened and the dried material is drawn down with the aid of the stirring arm 9, into the shaft 12 from whence it can be removed by means of a screw conveyor, for example.

[0011] To prevent the stirring arm 9 from binding against the intermediate base 2 when the latter undergoes certain changes in shape due to variations in temperature, it is necessary for the stirring device to be sprung.

[0012] As shown on the drawings in Figures 3 and 4, in addition to the drive axle 8 which was mentioned above, the main parts of the stirring device are a sleeve holder 48 connected to the drive axle, an arm 49 which is spring-supported on sleeve holder 48, and a blade 50 supported by the arm 49. In the embodiment example shown the sleeve holder 48 is formed by a four-sided tube 51. The sleeve holder 48 is perpendicular relative to the drive axle 8 and is fixed on the latter via a stub connection 52 which is welded to the side of the tube 51 and the inner diameter of which corresponds to the external diameter of the drive axle 8. Expediently, the drive axle 8 is connected non- rotatably to the stub connection 52 by means of a wedge connection or the like. The arm 49 has a supporting part 53 projecting from the tube 51 and a shaft part 54 projecting into the tube 51. Calculated in the transverse direction of the drive axle 8, the shaft part 54 has a width which corresponds substantially to the width of the hollow space inside the tube 51. Arranged one on either side of the stub connection 52 there are two stub connections 55 and 56 which are expediently arranged in the vicinity of each end of the tube 51. As is shown most clearly in Fig. 4, the stub connection 56, together with an upper end-piece 57 and a lower end-piece 58, forms an inner space which contains a compression spring 59 of the helical type, which rests via its upper end against a pressure plate 60, the outer diameter of which preferably corresponds to the inner diameter of the stub connection 56 and the vertical position of which can be adjusted by means of a bolt 61 extending through the upper end-piece 57. The bolt 61 can be locked to a yoke 62 which extends above the stub connection by means of a lock nut 63. The yoke 62 is supported by two fixing bolts 64 disposed on either side of the bolt 61, which are screwed fast in two projections 65 disposed on either side of the stub connection 56. The lower end of the compression spring 59 rests against a pressure plate 66 which bears a pressure rod 67 which extends downwards through a bore in the lower end-piece 58. The pressure rod 67 rests in turn against the upper face of the shaft part 54. On the other side of the drive axle a horizontal axle 68 passes through the shaft part 54 in its transverse direction. At the top of the axle 68 a bolt 69 is screwed in, with its head resting against a plate 70. The diameter of the plate 70 is slightly less than the internal diameter of the stub connection 55 and this plate forms the support for one end of a compression spring 71 of the helical type. The other end of the compression spring 71 rests against the lower end-piece 72 of the hollow space inside the stub connection 55. 73 designates a supporting nut firmly screwed on the bolt 69 and resting against the upper surface of the shaft part 54. The compression spring 59 thus strives to press the shaft part 54 downwards, while the compression spring 71 strives to lift up the left-hand section of the shaft part, as viewed in Figure 4. The arm 49 is thereby pressed via its scraper blade 50 against the base 2, both at the end which is located nearest to the drive axle 8 and also at the end which is located nearest to the peripheral wall of the chamber. Due to the described springing the scraper arm 49 is endowed with floating suspension, that is to say, it can carry out vertical pivoting movements and it can also be lifted and lowered in its entirety without pivoting, if this is necessary due to the base changing shape as a result of thermal fluctuations. The scraper blade 50 is held securely on a projection 74 projecting from the side of the arm 49 by means of adjusting screws 75 and fixing screws 76. To prevent the arm from moving in the longitudinal direction of the sleeve holder 48 abutment stops 77 and 78 are screwed to the sections of the shaft part 54 which extend out through the sleeve holder 48. The stop parts 77 and 78 are mounted on the shaft part by means of bolts 79 and 80 respectively disposed adjacent to the end edges of the sleeve 51.

Claims

1. An arrangement for preventing material, which is to be dried, from adhering to a base part (2) in a drying apparatus (1), which is preferably intended for drying natural manure and the like including a stirring device (9), which is connected to a drive axle (8), so as to be moved over said base part (2), and which is equipped with a vertically movable scraper arm (49) having an adjustable blade (50), characterized in that said stirring device (9) further includes a preferably tubular sleeve holder (48), which houses an arm part (54) of said scraper arm (49) and further houses in an axially spaced relationship a spring biased lifting device and a spring biased pressing device for said arm part, each device being within a separate cavity, said pressing device being positioned adjacent the scraper arm (49), so that said scraper arm (49) can carry out vertical pivoting movements and can also be lifted and lowered in its entirety without pivoting, said lifting device including a bolt (69) having a spring support plate (70) at one end and projecting through a lower end-portion (72) of said sleeve holder (48) to said arm part (54), to which it is connected by a horizontal axle (68) which is accommodated in a cavity in said arm part (54) and a supporting nut (73) displaceable along said bolt (69) and designed to rest against the upper surface of said arm part (54), said bolt (69) being screwable into said axle (68), and said lifting device further including a compression spring (71) acting between said spring support plate (70) and said end-portion (72).

2. An arrangement according to claim 1, characterized in that said pressing device comprises a movable pressing rod (67) together with an adjustment arrangement (61) which is connected to said sleeve holder (48) and respective opposed ends of said pressing rod and said adjustment arrangement have a stop plate (66 or 60 respectively), against which a compression spring (59) acts so that the lower end of said pressing rod (67) comes to rest on said arm part (54), said adjustment arrangement (61) preferably comprising a threaded bolt (61), which extends through a yoke (62) which is fixed to said sleeve holder (48) and also a lock nut (63) which co-acts with said yoke (62).

3. An arrangement according to claim 1 or 2, characterized in that said stirring device (9) is supported by said drive axle (8) which is disposed substantially vertically and one end of which is accommodated in said sleeve holder (48) substantially perpendicular thereto, in a stub connection (52), preferably in the region between said lifting and pressing device, and that said scraper arm (49) bears two abutment stops (77, 78) which are designed to co-act with said sleeve holder (48) and restrict the displacement of said scraper arm (49) in the longitudinal direction of said sleeve holder (48).

4. An arrangement according to any of the preceding claims 1-3, characterized in that it comprises a container (1) in which the material intended for drying is heated, said container (1) preferably being in the form of a closed vessel (1) which is equipped with an inlet aperture (6) for feeding in moist manure, and an aperture (12) for removing the dried product, said vessel (1) comprising an upper and a lower chamber (3 and 4 respectively) which are separated by a partition (2) made of thermally conducting material, said upper chamber (3) being designed to accommodate manure while said lower chamber (4) communicates with arrangements (23) for indirectly heating the manure via said partition (2), that a gas outlet hole (21) in said lower chamber (4) communicates with a hot air supply in the passage (34a) which opens into said lower chamber (4) in the vicinity of a section (25a) of a tubular element or the like surrounding a burner flame (23a), and that a gas inlet hole (20) is arranged in said lower chamber (4) for the circulation of gas in the latter (4), said lower chamber (4) preferably being divided into two sector- shaped chamber parts (A and B respectively) by means of a wall arrangement (15, 18) which extends from the outer wall (16) of said lower chamber (4) in the region between said gas outlet hole (21) and said gas inlet hole (20), separating them from each other, across the inside of the lower chamber (4) up to a certain distance from said outer wall (16) of said lower chamber (4), forming a through-flow opening (19) between said wall arrangement (18) and said chamber wall (16) and partially enclosing a sector of said lower chamber (4).

5. An arrangement according to claim 4, characterized in that, at a distance from said inlet passage (34a) which extends substantially tangentially in said preferably circular lower chamber (4), a burner (23) is connected to a sleeve (34) surrounding said tubular element section (25a) for said burner flame (23a), and that said tubular element section (25a) is formed by the end of an air supply pipe (25) which communicates with a fresh air inlet (42) and preferably also a gas outlet line (41) from a condensor (37) connected-to said upper chamber (3) of said vessel (1).

6. An arrangement according to either of claims 4-5, characterized in that said gas outlet hole (21) is in communication with said gas inlet hole (20), a gas circulation device such as a fan (30), for example, preferably being provided for the circulation of gas in a circuit.

7. An arrangement according to claim 5, characterized in that said air supply pipe (25) is connected to a heat-exchanger (26) which is connected in turn via a passage (28) to an outflow hole (22) in said lower chamber (4).

Revendications

1. Agencement pour empêcher une matière, qui doit être séchée, d'adhérer à une partie de base (2) d'un appareil de séchage (2), lequel est destiné de préférence au séchage de fumier naturel et autres matières analogues, comprenant un dispositif d'agitation (9) qui est relié à un arbre d'entraînement (8) de manière à être déplacé au-dessus de ladite partie de base (2) et qui est muni d'un bras de raclage (49) pouvant être déplacé verticalement et comportant une lame réglable (50), caractérisé en ce que le dispositif d'agitation (9) comprend, en outre, un manchon de support (48) qui est de préférence tubulaire et qui loge la partie bras (54) du bras de raclage (49) et loge en outre dans une disposition axialement espacée l'un par rapport à l'autre un dispositif de soulèvement sollicité par un ressort et un dispositif de pressage sollicité par un ressort pour ladite partie bras, chaque dispositif se trouvant dans une cavité séparée, le dispositif de pressage étant placé de façon adjacente au bras de raclage (49) de sorte que ledit bras de raclage (49) puisse effectuer des mouvements de pivotement verticaux et puisse aussi être soulevé et abaissé dans sa totalité sans pivotement, le dispositif de soulèvement précité comprenant un boulon (69) comportant une plaque (70) d'appui de ressort à une de ses extrémités et s'étendant à travers une partie terminale inférieure (72) dudit manchon de support (48) jusqu'à la partie bras (54) à laquelle il est relié par un axe horizontal (68) qui est logé dans une cavité de ladite partie bras (54), et un écrou d'appui (73) pouvant être déplacé le long du boulon (69) et conçu pour reposer contre la surface supérieure de ladite partie bras (54), le boulon (69) pouvant être vissé dans ledit axe (68) et le dispositif de levage comprenant, en outre, un ressort de compression (71) agissant entre ladite plaque (70) d'appui de ressort et ladite partie terminale (72).

2. Agencement selon la revendication 1, caractérisé en ce que le dispositif de pressage comprend une barre de pressage mobile (67) conjointement avec un dispositif de réglage (61) qui est relié audit manchon de support (48) et- les extrémités opposées respectives de la barre de pressage et du dispositif de réglage comportent une plaque d'arrêt (66 ou 60 respectivement) contre laquelle un ressort de compression (59) agit de manière que l'extrémité inférieure de ladite barre de pressage (67) vienne reposer sur ladite partie bras (54), le dispositif de réglage (61) comprenant de préférence un boulon (61) qui traverse une chape (62) qui est fixée au manchon de support (48) et également un écrou de blocage (63) qui coopère avec ladite chape (62).

3. Agencement selon la revendication 1 ou 2, caractérisé en ce que le dispositif d'agitation (9) est supporté par ledit arbre d'entraînement (8) qui est disposé de façon sensiblement verticale et dont une des extrémités est logée dans ledit manchon de support (48) de façon sensiblement perpendiculaire à ce dernier dans un raccord tubulaire (52), de préférence dans la région comprise entre le dispositif de soulèvement et le dispositif de pressage, et en ce que le bras de raclage (49) porte deux butées (77, 78) qui sont conçues de manière à coopérer avec ledit manchon de support (48) et limite le déplacement du bras de raclage (49) dans la direction longitudinale du manchon de support (48).

4. Agencement selon l'une quelconque des revendications précédentes 1-3, caractérisé en ce qu'il comprend un récipient (1) dans lequel la matière destinée à être séchée est chauffée, ledit récipient (1) se présentant de préférence sous la forme d'une cuve fermée (1) qui est pourvue d'une ouverture d'entrée (6) pour l'arrivée du fumier humide, et une ouverture (12) pour l'enlèvement du produit séché, ladite cuve (1) comprenant une chambre supérieure et une chambre inférieure (3 et 4 respectivement) qui sont séparées par une cloison (2) formée d'une matière conductrice de la chaleur, ladite chambre supérieure (3) étant conçue de manière à loger le fumier tandis que la chambre inférieure (4) communique avec les dispositifs (23) destinés à chauffer indirectement le fumier par l'intermédiaire de ladite cloison (2), en ce qu'un trou (21) de sortie de gaz dans ladite chambre inférieure (4) communique avec une arrivée d'air chaud dans le passage (34a) qui débouche dans ladite chambre inférieure (4) au voisinage d'une section (25a) d'un élément tubulaire ou analogue entourant une flamme (23a) de brûleur, et en ce qu'un trou (20) d'entrée de gaz est formé dans ladite chambre inférieure (4) pour la circulation du gaz dans cette dernière (4), ladite chambre inférieure (4) étant de préférence divisée en deux parties de chambre en forme de secteurs (A et B respectivement) au moyen d'un agencement de parois (15, 18) qui s'étend depuis la paroi extérieure (16) de ladite chambre inférieure (4) dans la région comprise entre le trou (21) de sortie de gaz et le trou (20) d'entrée de gaz en séparant ceux-ci l'un de l'autre, en travers de l'intérieur de la chambre inférieure (4) jusqu'à une certaine distance de ladite paroi extérieure (16) de la chambre inférieure (4) en formant une ouverture d'écoulement (19) entre l'agencement de parois (18) et la paroi (16) de chambre et enfermant partiellement un secteur de la chambre inférieure (4).

5. Agencement selon la revendication 4, caractérisé en ce qu'à une certaine distance du passage d'entrée (34a) qui s'étend de façon sensiblement tangentielle dans ladite chambre inférieure (4) de préférence circulaire, un brûleur (23) est raccordé à un manchon (34) entourant la section d'éléments tubulaires (25a) pour la flamme (23a) de brûleur, et en ce que la section d'éléments tubulaires (25a) est formée par l'extrémité d'un conduit (25) d'alimentation en air qui communique avec une entrée (42) d'air frais et de préférence également avec une canalisation (41) de sortie de gaz arrivant d'un condenseur (37) raccordé à ladite chambre supérieure (3) de la cuve (1).

6. Agencement selon la revendication 4 ou 5, caractérisé en ce que le trou (21) de sortie de gaz communique avec le trou (20) d'entrée de gaz, un dispositif de circulation de gaz, comme par exemple un ventilateur (30), étant de préférence présent pour la circulation du gaz dans un circuit.

7. Agencement selon la revendication 5, caractérisé en ce que le conduit (25) d'alimentation en air est raccordé à un échangeur de chaleur (26) qui est raccordé lui-même par l'intermédiaire d'un passage (28) à un trou d'échappement (22) formé dans ladite chambre inférieure (4).

Ansprüche

1. Anordnung zur Verhinderung, daß Material, das getrocknet werden soll, an einem Bodenteil (2) in einer Trocknungsvorrichtung (1), die bevorzugterweise zum Trocknen natürlicher Düngemittel oder ähnlichem vorgesehen ist, festhaftet, mit einer Rührvorrichtung (9), die mit einer Antriebsachse (8) so verbunden ist, daß sie über das Bodenteil (2) bewegt werden kann, und die mit einem vertikal bewegbaren Schabeausleger (49), der ein einstellbares Schild (50) aufweist, versehen ist, dadurch gekennzeichnet, daß die Rührvorrichtung (9) desweiteren einen bevorzugterweise röhrenförmigen Buchsenhalter (48) aufweist, der ein Auslegerteil (54) des Schabeauslegers (49) aufnimmt und desweiteren eine federbelastete Anhebevorrichtung und eine federbelastete Andrückvorrichtung für das Auslegerteil, die in axial auseinanderliegender Weise zueinander angeordnet sind, aufnimmt, wobei jede Vorrichtung in einer separaten Kammer angeordnet ist, wobei die Andrückvorrichtung nahe dem Schabeausleger (49) angeordnet ist, so daß der Schabeausleger (49) vertikale Schwenkbewegungen ausführen und desweiteren als Gesamtheit ohne zu schwenken angehoben und abgeschwenkt werden kann, wobei die Anhebevorrichtung einen Bolzen (69) aufweist, der an einem Ende eine Federauflagerplatte (70) aufweist und durch einen unteren Endabschnitt (72) des Buchsenhalters (48) in das Auslegerteil (54) hineinragt, mit dem er mittels einer horizontalen Welle (68), die in einer Kammer des Auslegerteils angeordnet ist, und einer Haltemutter (73) verbunden ist, die entlang des Bolzens (69) verstellbar ist und vorgesehen ist, um an der oberen Oberfläche des Auslegerteils (54) anzuliegen, wobei der Bolzen (69) in die Welle (68) einschraubbar ist und die Anhebevorrichtung desweiteren eine Druckfeder (71) aufweist, die zwischen der Federauflagerplatte (70) und dem Endabschnitt (72) wirkt.

2. Anordnung gemäß Anspruch 1, dadurch gekennzeichnet, daß die Andruckvorrichtung eine bewegbare Druckstange (67) zusammen mit einer Einstellvorrichtung (61) aufweist, die mit dem Buchsenhalter (48) verbunden ist, und entsprechende entgegengesetzte Enden der Druckstange und der Einstellvorrichtung eine Anschlagplatte (66 bzw. 60) aufweisen, gegen die eine Druckfeder (59) so wirkt, daß das untere Ende der Druckstange (67) zur Anlage auf dem Auslegerteil (54) kommt, wobei die Einstellvorrichtung (60) bevorzugterweise einen Gewindebolzen (61), der durch ein Joch (62), das am Buchsenhalter (48) befestigt ist, verläuft, und desweiteren eine Feststellmutter (63) aufweist, die mit dem Joch (62) zusammenwirkt.

3. Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Rührvorrichtung (9) mittels der Antriebsachse (8), die im wesentlichen vertikal angeordnet ist und deren eines Ende im Buchsenhalter (48) im wesentlichen senkrecht zu diesem aufgenommen ist, in einem Stutzenanschluß (52) bevorzugterweise in einem Abschnitt zwischen der Abhebe- und der Andrückvorrichtung gehalten ist und daß der Schabeausleger (49) zwei Lageranschläge (77, 78) trägt, die so ausgeführt sind, daß sie mit dem Buchsenhalter (48) zusammenwirken und die Verschiebung des Schabeauslegers (49) in Längsrichtung des Buchsenhalters (48) beschränken.

4. Anordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sie einen Behälter (1) aufweist, in dem das zu trocknende Material erwärmt wird, wobei der Behalter (1) bevorzugterweise die Form eines geschlossenen Behälters (1) aufweist, der mit einer Einlaßöffnung (6) zur Zuführung des feuchten Düngemittels und einer Öffnung (12) zur Entnahme des getrockneten Produktes versehen ist, wobei der Behälter (1) eine obere und eine untere Kammer (3 bzw. 4) aufweist, die durch eine Trennwand (2), die aus einem thermisch leitenden Werkstoff besteht, getrennt sind, wobei die obere Kammer (3) ausgeführt ist, um das Düngemittel aufzunehmen, während die untere Kammer (4) mit Vorrichtungen (23) zum indirekten Erwärmen des Düngemittels über die Trennwand (2) in Verbindung steht, daß ein Gasausströmloch (21) in der unteren Kammer (4) mit einer Heißluftzufuhr in dem Durchlaß (34a), der in die untere Kammer (4) in der Nähe eines Abschnittes (25a) eines rohrförmigen Elementes oder ähnlichem, das eine Brennerflamme (23a) umgibt, mündet, in Verbindung steht, und daß ein Gaseinströmloch (20) in der unteren Kammer (4) zur Zirkulation des Gases in der Kammer (4) angeordnet ist, wobei die untere Kammer bevorzugterweise in zwei sektorförmige Kammerabschnitte (A bzw. B) mittels einer Wandanordnung (15, 18) geteilt ist, die von der Außenwand (16) der unteren Kammer (4) im Bereich zwischen dem Gasausströmloch (21) und dem Gaseinströmloch (20) verläuft, diese voneinander trennt, durch das Innere der unteren Kammer (4) bis zu einem gewissen Abstand von der Außenwand (16) der unteren Kammer (4) verläuft, eine Durchströmöffnung (19) zwischen der Wandanordnung (18) und der Kammerwand (16) bildet und einen Sektor der unteren Kammer (4) teilweise abschließt.

5. Anordnung nach Anspruch 4, dadurch gekennzeichnet, daß im Abstand von dem Einströmdurchlaß (34a), der im wesentlichen tangential zu der bevorzugterweise kreisförmigen unteren Kammer (4) verläuft, ein Brenner (23) mit einer Hülse (34) in Verbindung steht, die den rohrförmigen Elementabschnitt (25a) für die Brennerflamme (23a) umgibt, und daß der rohrförmige Elementabschnitt (25a) durch das Ende eines Luftzuführrohres (25) gebildet ist, das mit einem Frischlufteinlaß (42) und bevorzugterweise auch mit einer Gasauslaßleitung (41) eines Kondensators (37), der mit der oberen Kammer (3) des Behälters (1) in Verbindung steht, verbunden ist.

6. Anordnung nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, daß das Gasausströmloch (21) mit dem Gaseinströmloch (20) in Verbindung steht, wobei eine Gaszirkulationsvorrichtung, z.B. ein Flügelrad (30), in einem Kreislauf zur Zirkulation des Gases angeordnet ist.

7. Anordnung nach Anspruch 5, dadurch gekennzeichnet, daß das Luftzuführrohr (25) mit einem Wärmetauscher (26) verbunden ist, der bei Betrieb über einen Durchlaß (28) mit einem Ausströmloch (22) in der unteren Kammer (3) in Verbindung steht.

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