Granule boiling dryer with tail gas filtering function

Abstract

The utility model relates to the technical field of granule boiling dryers, and provides a granule boiling dryer with a tail gas filtering function, which comprises a dryer main body and a drying structure. By arranging the drying structure, external air is conveyed into the heating box by starting the air pump, is dried by the drying plate and then is heated into hot air by the heater, and the hot air is conveyed into the built-in cavity by the air guide pipe and is sprayed out by the spray head; meanwhile, the tail gas enters the filter box through a gas outlet pipe, is subjected to multiple filtration through a filter screen and an activated carbon filter plate and then is exhausted outwards through an exhaust pipe, so that harmful substances in the tail gas can be filtered and purified, and environmental protection is facilitated; meanwhile, a second rotating rod is rotated to drive a first bevel gear to rotate, so that the second bevel gear rotates to drive a first rotating rod to enable a rotating brush to rotate to clean a filter screen, and the situation that the filtering effect is reduced due to excessive impurities on the filter screen is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of granule fluidized bed dryers, and particularly relates to a granule fluidized bed dryer with a tail gas filtering function. Background Art

[0002] A granule fluidized bed dryer is a device specifically used for drying wet granules and is widely used in the fields of medicine, chemical industry, food, etc. A granule fluidized bed dryer with a tail gas filtering function is a device that adds a tail gas treatment system on the basis of a traditional fluidized bed dryer, mainly used for filtering and purifying the tail gas generated during the drying process to meet environmental protection requirements;

[0003] For this reason, the patent with the publication number CN219390333U discloses a granule dryer, which relates to the technical field of granule drying. The utility model includes a housing with a heating chamber inside. A drying cylinder is arranged in the heating chamber. A bottom cover is arranged at the bottom of the drying cylinder. A feed pipe communicating with the drying cylinder is arranged on the side wall of the housing. An air inlet and discharge pipe is arranged at the bottom of the housing. A heating layer is arranged on the inner wall of the heating chamber on the side of the drying cylinder. A stirring pipe is arranged in the drying cylinder. The stirring pipe is covered with air holes. A fixing ring is arranged at the upper part of the top of the housing. A movable ring is rotatably arranged at the bottom of the fixing ring. An air inlet pipe is arranged on the fixing ring. A trachea communicating with the stirring pipe is rotatably arranged at the bottom of the movable ring. A planetary gear mechanism for driving the trachea to move in a circle and rotate itself is arranged at the top of the housing. A driving source for driving the bottom cover to lift is arranged in the heating chamber below the bottom cover. The fixing ring and the movable ring are circular and are coaxial with the trajectory of the circular motion of the trachea;

[0004] During the use of the above granule dryer, some harmful substances are contained in the tail gas after drying, and direct emission will cause certain harm to the environment, and it is not convenient to filter and purify the harmful substances in the exhaust gas to make it meet the emission standards. Content of the Utility Model

[0005] The purpose of the utility model is to provide a granule fluidized bed dryer with a tail gas filtering function to solve the defect that the existing granule fluidized bed dryer is not convenient for filtering tail gas.

[0006] To solve the above technical problems, the utility model provides the following technical solution: A granule fluidized bed dryer with a tail gas filtering function, including a dryer main body and a drying structure;

[0007] A first housing is arranged inside the dryer main body. A second housing is installed at the bottom end of the first housing. A connecting flange is fixed to the top end of the second housing at the bottom end of the first housing. Legs are fixed to the edge positions at the bottom end of the second housing;

[0008] One side of the top end of the first outer shell is fixedly provided with a feed hopper, and a rotating structure is installed inside the first outer shell and the second outer shell;

[0009] A drying structure is installed on the outer side of the first outer shell. The drying structure includes a bracket, an air pump, a heating box, a drying plate, a heater, a duct, an inner cavity, a nozzle, an air outlet pipe, a filter box, an exhaust pipe, a support shell, a first bevel gear, a second bevel gear, a first rotating rod, a rotating brush, a filter screen, an activated carbon filter plate, and a second rotating rod. The bracket is fixed on one side of the top of the first outer shell. The top end of the bracket is fixedly provided with an air pump. One end of the air pump is fixedly provided with a heating box. A drying plate is installed inside the heating box. A heater is installed on one side of the drying plate. A duct is fixed on one side of the heating box. An inner cavity is arranged inside the first outer shell. A nozzle is fixed on one side of the inner cavity. An air outlet pipe is fixed on one side of the top end of the first outer shell. A filter box is fixed on the top end of the first outer shell at one end of the inner cavity. An exhaust pipe is fixed on the top end of the filter box. A support shell is fixed inside the filter box. A first bevel gear is installed inside the support shell. A second bevel gear is installed on one side of the first bevel gear. One end of the second bevel gear is fixedly provided with a first rotating rod. A rotating brush is fixed on one end of the first rotating rod. A filter screen is fixed inside the filter box. An activated carbon filter plate is fixed on one side of the filter screen. A second rotating rod is fixed on one end of the first bevel gear.

[0010] Preferably, the rotating structure includes a rotating cylinder, a blanking hopper, a support block, an annular groove, an annular block, a ball, a discharge pipe, a valve, a reciprocating motor, a rotating shaft, a rotating block, a limiting groove, a limiting block, a feed groove, and a stirring plate. The rotating cylinder is installed inside the first outer shell. A blanking hopper is installed at the bottom end of the rotating cylinder. A support block is fixed at the top end inside the second outer shell. An annular groove is arranged inside the support block. An annular block is fixed on the outer side of the rotating cylinder inside the annular groove. A ball is installed inside the top end of the blanking hopper at the bottom end of the rotating cylinder. A discharge pipe is fixed at the bottom end of the blanking hopper. A valve is fixed at the bottom end of the second outer shell on the outer side of the discharge pipe. A reciprocating motor is fixed at the middle position of the top end of the first outer shell. A rotating shaft is installed at the middle position inside the first outer shell. A rotating block is fixed at the top end of the rotating cylinder on the outer side of the rotating shaft. Limiting grooves are arranged on both sides inside the rotating block. Limiting blocks are fixed on both sides of the rotating shaft inside the limiting grooves. A feed groove is arranged on one side of the top end of the rotating cylinder. Stirring plates are uniformly fixed on the outer side of the rotating shaft inside the rotating cylinder.

[0011] Preferably, the rotating cylinder is arranged in a mesh structure. The rotating cylinder is rotatably connected inside the support block through the annular block. The outer side of the blanking hopper is fixedly connected with the inner side of the support block. The rotating cylinder is rotatably connected at the top end of the blanking hopper through the ball.

[0012] Preferably, the top end of the rotating shaft penetrates through the top end of the first housing and extends to the outside of the first housing and is fixedly connected to the output end of the reciprocating motor. There are two groups of limiting blocks, which are symmetrically distributed on both sides of the rotating shaft inside the rotating block. The top end of the rotating block is rotatably connected to the top end inside the first housing. The bottom end of the feed hopper penetrates through the top end of the first housing and extends into the first housing and corresponds to the top end of the feed chute.

[0013] Preferably, the output end of the air pump extends into the heating box. One end of the air duct penetrates through one side of the first housing and extends into the inner cavity. The inner cavity is arranged in an annular structure.

[0014] Preferably, one end of the spray head penetrates through one side of the inner cavity and extends into the first housing. There are several groups of spray heads, which are equidistantly distributed on the inner side of the inner cavity.

[0015] Preferably, the top end of the air outlet pipe penetrates through the bottom end of the filter box and extends into the filter box. The first bevel gear is meshed with the second bevel gear. The top end of the first rotating rod penetrates through the top end of the support shell and extends to the outside of the support shell and is fixedly connected to the middle position at the bottom end of the rotary brush. One side of the rotary brush abuts against one side of the filter net. One end of the second rotating rod penetrates through one side of the filter box and extends to the outside of the filter box and is fixed with a rotating block.

[0016] The advantages of a granule fluidized bed dryer with tail gas filtering function provided by the present utility model are as follows:

[0017] By providing a rotating structure, by setting a reciprocating motor, when the reciprocating motor stops working, it can drive the rotating cylinder to return to its original position, so that the feed chute is always aligned with the center point of the feed hopper, which is convenient for feeding through the feed hopper and the feed chute. By starting the reciprocating motor to drive the rotating shaft to rotate, the rotating shaft drives the limiting block to rotate, and under the action of the limiting groove, the rotating block is driven to rotate. The rotation of the rotating block drives the rotating cylinder to rotate, so that the rotating cylinder drives the annular block to rotate inside the annular groove, and the rolling ball rotates at the top end of the blanking hopper. At the same time, with the rotation of the rotating cylinder and the rotation of the rotating shaft, the stirring plate is driven to rotate to stir the particles inside the rotating cylinder, so as to stir the particles evenly, so that the particles can be evenly heated and the internal moisture can be quickly dissipated, so that the particles can be quickly dried, improving the work efficiency;

[0018] By setting up a drying structure, when the air pump is started, the outside gas is transported into the heating box and dried by the drying plate, and then heated by the heater to become hot air. Thus, the hot air is transported into the internal cavity through the air duct and sprayed into the inside of the first housing through the nozzle. By setting multiple groups of nozzles, the inside of the first housing can be quickly heated up, reducing the heating energy consumption. At the same time, the tail gas enters the inside of the filter box through the exhaust pipe, and after being filtered multiple times by the filter net and the activated carbon filter plate, it is discharged to the outside through the exhaust pipe. Therefore, the harmful substances in the tail gas can be filtered and purified, which is beneficial to environmental protection. At the same time, by rotating the second rotating rod to drive the first bevel gear to rotate, and then the second bevel gear rotates to drive the first rotating rod to make the rotating brush rotate to clean the filter net, avoiding the reduction of the filtering effect caused by too many impurities on the filter net. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 is a front sectional structural schematic diagram of the present utility model;

[0021] Figure 3 is of the present utility model Figure 2 magnified structural schematic diagram at A in;

[0022] Figure 4 is a side sectional structural schematic diagram of the present utility model;

[0023] Figure 5 is of the present utility model Figure 4 magnified structural schematic diagram at B in.

[0024] Explanation of the reference numerals in the drawings: 1, main body of the dryer; 101, first housing; 102, second housing; 103, connecting flange; 104, leg; 105, feed hopper; 2, rotating structure; 201, rotating cylinder; 202, blanking hopper; 203, support block; 204, annular groove; 205, annular block; 206, ball; 207, discharge pipe; 208, valve; 209, reciprocating motor; 210, rotating shaft; 211, rotating block; 212, limiting groove; 213, limiting block; 214, feed groove; 215, stirring plate; 3, drying structure; 301, bracket; 302, air pump; 303, heating box; 304, drying plate; 305, heater; 306, air duct; 307, internal cavity; 308, nozzle; 309, exhaust pipe; 310, filter box; 311, exhaust pipe; 312, support shell; 313, first bevel gear; 314, second bevel gear; 315, first rotating rod; 316, rotating brush; 317, filter net; 318, activated carbon filter plate; 319, second rotating rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-5 , a granule fluidized bed dryer with a tail gas filtration function provided by the present utility model includes a dryer main body 1 and a drying structure 3.

[0027] Refer to Figure 2 , Figure 4 and Figure 5As shown in the figure, a first outer shell 101 is provided inside the dryer main body 1. A second outer shell 102 is installed at the bottom end of the first outer shell 101. A connecting flange 103 is fixed at the top end of the second outer shell 102 at the bottom end of the first outer shell 101. Legs 104 are fixed at the edge positions of the bottom end of the second outer shell 102. A feed hopper 105 is fixed on one side of the top end of the first outer shell 101. A rotating structure 2 is installed inside the first outer shell 101 and the second outer shell 102. The rotating structure 2 includes a rotating cylinder 201, a blanking hopper 202, a support block 203, an annular groove 204, an annular block 205, a ball 206, a discharge pipe 207, a valve 208, a reciprocating motor 209, a rotating shaft 210, a rotating block 211, a limiting groove 212, a limiting block 213, a feed groove 214, and a stirring plate 215. The rotating cylinder 201 is installed inside the first outer shell 101. A blanking hopper 202 is installed at the bottom end of the rotating cylinder 201. A support block 203 is fixed at the top end inside the second outer shell 102. An annular groove 204 is provided inside the support block 203. An annular block 205 is fixed on the outer side of the rotating cylinder 201 inside the annular groove 204. A ball 206 is installed inside the top end of the blanking hopper 202 at the bottom end of the rotating cylinder 201. The bottom end of the blanking hopper 202 is fixed with a discharge pipe 207. A valve 208 is fixed at the bottom end of the second outer shell 102 on the outer side of the discharge pipe 207. A reciprocating motor 209 is fixed at the middle position of the top end of the first outer shell 101. A rotating shaft 210 is installed at the middle position inside the first outer shell 101. A rotating block 211 is fixed at the top end of the rotating cylinder 201 on the outer side of the rotating shaft 210. Limiting grooves 212 are provided on both sides inside the rotating block 211. Limiting blocks 213 are fixed on both sides of the rotating shaft 210 inside the limiting grooves 212. A feed groove 214 is provided on one side of the top end of the rotating cylinder 201. Stirring plates 215 are uniformly fixed on the outer side of the rotating shaft 210 inside the rotating cylinder 201. The rotating cylinder 201 is arranged in a mesh structure. The rotating cylinder 201 is rotatably connected inside the support block 203 through the annular block 205. The outer side of the blanking hopper 202 is fixedly connected to the inner side of the support block 203. The rotating cylinder 201 is rotatably connected at the top end of the blanking hopper 202 through the ball 206. The top end of the rotating shaft 210 penetrates through the top end of the first outer shell 101 and extends to the outside of the first outer shell 101 and is fixedly connected to the output end of the reciprocating motor 209. There are two groups of limiting blocks 213, and the limiting blocks 213 are symmetrically distributed on both sides of the rotating shaft 210 inside the rotating block 211. The top end of the rotating block 211 is rotatably connected to the top end inside the first outer shell 101. The bottom end of the feed hopper 105 penetrates through the top end of the first outer shell 101 and extends to the inside of the first outer shell 101 and corresponds to the top end of the feed groove 214.

[0028] By setting the reciprocating motor 209, when the reciprocating motor 209 stops working, it can drive the rotating cylinder 201 back to its original position, so that the feeding chute 214 is always aligned with the center point of the feeding hopper 105, facilitating feeding through the feeding hopper 105 and into the feeding chute 214. By starting the reciprocating motor 209 to drive the rotating shaft 210 to rotate, the rotating shaft 210 drives the limiting block 213 to rotate, and under the action of the limiting groove 212, the rotating block 211 is driven to rotate. The rotation of the rotating block 211 drives the rotating cylinder 201 to rotate, so that the rotating cylinder 201 drives the annular block 205 to rotate inside the annular groove 204. And the ball 206 rotates at the top of the blanking hopper 202. At the same time, in cooperation with the rotation of the rotating cylinder 201 and the rotation of the rotating shaft 210, the stirring plate 215 is driven to rotate to stir the particles inside the rotating cylinder 201, so as to uniformly stir the particles, enabling the particles to be uniformly heated and facilitating the rapid evaporation of the internal moisture, so that the particles can be quickly dried, improving the work efficiency.

[0029] Refer to Figures 1-3As shown, a drying structure 3 is installed on the outer side of the first housing 101. The drying structure 3 includes a bracket 301, an air pump 302, a heating box 303, a drying plate 304, a heater 305, an air duct 306, an inner cavity 307, a nozzle 308, an air outlet pipe 309, a filter box 310, an exhaust pipe 311, a support shell 312, a first bevel gear 313, a second bevel gear 314, a first rotating rod 315, a rotating brush 316, a filter screen 317, an activated carbon filter plate 318, and a second rotating rod 319. The bracket 301 is fixed to one side of the top of the first housing 101. The top of the bracket 301 is fixed with the air pump 302. One end of the air pump 302 is fixed with the heating box 303. The drying plate 304 is installed inside the heating box 303. One side of the drying plate 304 is installed with the heater 305. One side of the heating box 303 is fixed with the air duct 306. An inner cavity 307 is arranged inside the first housing 101. One side of the inner cavity 307 is fixed with the nozzle 308. One side of the top of the first housing 101 is fixed with the air outlet pipe 309. One end of the inner cavity 307 at the top of the first housing 101 is fixed with the filter box 310. The top of the filter box 310 is fixed with the exhaust pipe 311. A support shell 312 is fixed inside the filter box 310. The first bevel gear 313 is installed inside the support shell 312. One side of the first bevel gear 313 is installed with the second bevel gear 314. One end of the second bevel gear 314 is fixed with the first rotating rod 315. One end of the first rotating rod 315 is fixed with the rotating brush 316. The filter screen 317 is fixed inside the filter box 310. One side of the filter screen 317 is fixed with the activated carbon filter plate 318. One end of the first bevel gear 313 is fixed with the second rotating rod 319. The output end of the air pump 302 extends into the heating box 303. One end of the air duct 306 penetrates through one side of the first housing 101 and extends into the inner cavity 307. The inner cavity 307 is arranged in a ring structure. One end of the nozzle 308 penetrates through one side of the inner cavity 307 and extends into the first housing 101. The nozzle 308 is provided with several groups. The inner cavity 307 is evenly distributed at equal intervals on the inner side of the inner cavity 307. The top of the air outlet pipe 309 penetrates through the bottom of the filter box 310 and extends into the filter box 310. The first bevel gear 313 is meshed with the second bevel gear 314. The top of the first rotating rod 315 penetrates through the top of the support shell 312 and extends to the outside of the support shell 312 and is fixedly connected to the middle position at the bottom of the rotating brush 316. One side of the rotating brush 316 abuts against one side of the filter screen 317. One end of the second rotating rod 319 penetrates through one side of the filter box 310 and extends to the outside of the filter box 310 and is fixed with a rotating block.

[0030] By starting the air pump 302, the gas from the outside is transported into the interior of the heating box 303, dried by passing through the drying plate 304, and then heated into hot air by the heater 305. Thus, the hot air is transported into the interior of the built-in cavity 307 through the air duct 306 and sprayed into the interior of the first housing 101 through the nozzle 308. By arranging multiple groups of nozzles 308, the interior of the first housing 101 can be quickly heated up, reducing the heating energy consumption. At the same time, the dried gas enters the interior of the filter box 310 through the air outlet pipe 309, and after being multi-filtered by the filter screen 317 and the activated carbon filter plate 318, it is discharged to the outside through the exhaust pipe 311. Thus, the harmful substances in the tail gas can be filtered and purified, which is beneficial to environmental protection. At the same time, by rotating the second rotating rod 319 to drive the first bevel gear 313 to rotate, the second bevel gear 314 is rotated to drive the first rotating rod 315 to rotate the brush 316 to clean the filter screen 317, avoiding the reduction of the filtering effect caused by excessive impurities on the filter screen 317.

[0031] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A granule boiling dryer with tail gas filtering function, comprising a dryer body (1) and a drying structure (3); Features: A first shell (101) is arranged inside the dryer body (1), a second shell (102) is installed at the bottom end of the first shell (101), a connecting flange (103) is fixed at the top end of the second shell (102) at the bottom end of the first shell (101), and legs (104) are fixed at the edge positions of the bottom end of the second shell (102); A feed hopper (105) is fixed to one side of the top of the first shell (101), and a rotating structure (2) is installed inside the first shell (101) and the second shell (102); A drying structure (3) is installed on the outer side of the first housing (101), and the drying structure (3) comprises a bracket (301), an air pump (302), a heating box (303), a drying plate (304), a heater (305), an air guide pipe (306), a built-in cavity (307), a nozzle (308), an air outlet pipe (309), a filter box (310), an exhaust pipe (311), a support shell (312), a first bevel gear (313), a second bevel gear (314), a first rotating rod (315), a rotating brush (316), and a plurality of rotating shafts (317). ), a filter screen (317), an activated carbon filter plate (318) and a second rotating rod (319), the bracket (301) is fixed to one side of the top of the first shell (101), an air pump (302) is fixed to the top of the bracket (301), a heating box (303) is fixed to one end of the air pump (302), a drying plate (304) is installed inside the heating box (303), a heater (305) is installed on one side of the drying plate (304), and an air guide duct (306) is fixed to one side of the heating box (303). ), a built-in cavity (307) is provided inside the first shell (101), a nozzle (308) is fixed on one side of the built-in cavity (307), an air outlet pipe (309) is fixed on one side of the top of the first shell (101), a filter box (310) is fixed on the top of the first shell (101) at one end of the built-in cavity (307), an exhaust pipe (311) is fixed on the top of the filter box (310), a support shell (312) is fixed inside the filter box (310), and a A first bevel gear (313), a second bevel gear (314) is installed on one side of the first bevel gear (313), a first rotating rod (315) is fixed to one end of the second bevel gear (314), a rotating brush (316) is fixed to one end of the first rotating rod (315), a filter screen (317) is fixed inside the filter box (310), an activated carbon filter plate (318) is fixed to one side of the filter screen (317), and a second rotating rod (319) is fixed to one end of the first bevel gear (313).

2. The granule fluidized bed dryer with tail gas filtering function according to claim 1, characterized in that: The rotating structure (2) comprises a rotating cylinder (201), a material drop hopper (202), a support block (203), an annular groove (204), an annular block (205), a ball bearing (206), a discharge pipe (207), a valve (208), a reciprocating motor (209), a rotating shaft (210), a rotating block (211), a limit groove (212), a limit block (213), a feed trough (214) and a stirring plate (215); the rotating cylinder (201) is installed inside the first shell (101); the material drop hopper (202) is installed at the bottom end of the rotating cylinder (201); the support block (203) is fixed at the top end of the second shell (102); an annular groove (204) is arranged inside the support block (203); an annular block (205) is fixed on the outside of the rotating cylinder (201) inside the annular groove (204); the material drop hopper (202) at the bottom end of the rotating cylinder (201) A ball bearing (206) is installed inside the top of the material hopper (202), a discharge pipe (207) is fixed at the bottom end of the discharge hopper (202), a valve (208) is fixed at the bottom end of the second shell (102) outside the discharge pipe (207), a reciprocating motor (209) is fixed at the middle position of the top of the first shell (101), a rotating shaft (210) is installed at the middle position inside the first shell (101), a rotating block (211) is fixed at the top of the rotating cylinder (201) outside the rotating shaft (210), limiting grooves (212) are provided on both sides of the rotating block (211), limiting blocks (213) are fixed on both sides of the rotating shaft (210) inside the limiting grooves (212), a feeding groove (214) is provided on one side of the top of the rotating cylinder (201), and a stirring plate (215) is evenly fixed on the outside of the rotating shaft (210) inside the rotating cylinder (201).

3. The granule fluidized bed dryer with tail gas filtering function according to claim 2, characterized in that: The rotating cylinder (201) is arranged in a mesh structure, the rotating cylinder (201) is rotatably connected inside the support block (203) via an annular block (205), the outer side of the drop hopper (202) is fixedly connected to the inner side of the support block (203), and the rotating cylinder (201) is rotatably connected to the top of the drop hopper (202) via a ball (206).

4. The granule boiling dryer with tail gas filtering function according to claim 2, characterized in that: The top end of the rotating shaft (210) passes through the top end of the first housing (101), extends to the outside of the first housing (101), and is fixedly connected to the output end of the reciprocating motor (209); two groups of limit blocks (213) are provided; the limit blocks (213) are symmetrically distributed on both sides of the rotating shaft (210) inside the rotating block (211); the top end of the rotating block (211) is rotatably connected to the top end inside the first housing (101); the bottom end of the feed hopper (105) passes through the top end of the first housing (101), extends to the inside of the first housing (101), and corresponds to the top end of the feed trough (214).

5. The granule fluidized bed dryer with tail gas filtering function according to claim 1, characterized in that: The output end of the air pump (302) extends to the interior of the heating box (303), and one end of the air duct (306) passes through one side of the first shell (101) and extends to the interior of the built-in cavity (307), and the built-in cavity (307) is arranged in an annular structure.

6. The granule fluidized bed dryer with tail gas filtering function according to claim 1, characterized in that: One end of the nozzle (308) passes through one side of the built-in cavity (307) and extends to the inside of the first shell (101). The nozzle (308) is provided in a plurality of groups, and the built-in cavities (307) are distributed at equal intervals inside the built-in cavity (307).

7. The granule fluidized bed dryer with tail gas filtering function according to claim 1, characterized in that: The top end of the air outlet pipe (309) passes through the bottom end of the filter box (310) and extends to the inside of the filter box (310); the first bevel gear (313) is meshedly connected with the second bevel gear (314); the top end of the first rotating rod (315) passes through the top end of the support shell (312) and extends to the outside of the support shell (312) and is fixedly connected to the middle position of the bottom end of the rotating brush (316); one side of the rotating brush (316) contacts one side of the filter screen (317); one end of the second rotating rod (319) passes through one side of the filter box (310) and extends to the outside of the filter box (310) and is fixed with a rotating block.

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