CN222761320U - Drying device - Google Patents

Abstract

The application provides a drying device which comprises a crushing device, a scraper conveying device and a rotary drum drying device which are sequentially connected in series, wherein the scraper conveying device comprises a conveying chute and a steam heating bin arranged at the bottom of the conveying chute, the rotary drum drying device is also connected with a hot air supply device, and the hot air output end of the rotary drum drying device is connected with the input end of a heat exchange medium of the steam heating bin. The device of the application recycles the heat in the hot air output by the rotary drum drying device through the cooperation of the structure, and overcomes the defect of energy waste caused by the difficulty in fully utilizing the heat when the traditional hot air drying device dries materials.

Description

Drying device

Technical Field

The application relates to the technical field of material drying, in particular to a drying device.

Background

In the production process of chemical pharmacy, a filter cake formed by a target product obtained by filtration is often required to be dried, and at present, common drying modes mainly comprise hot air drying, vacuum freeze drying, infrared drying, microwave drying and the like. The hot air drying is one of the most widely used drying modes at present, and the drying process uses dry hot air as a drying medium to perform wet heat exchange with wet materials in a natural or forced convection circulation mode, wherein moisture on the surfaces of the materials, namely water vapor, is diffused to an airflow main body through an air film on the surfaces, and meanwhile, as a result of vaporization of the surfaces of the materials, moisture gradient difference is generated between the interiors of the materials and the surfaces, and the moisture in the interiors of the materials is diffused to the surfaces in a vapor state or a liquid state so as to realize the method for drying the wet materials.

In the existing hot air drying mode, after the materials are dried, cold air is introduced to cool the materials, and hot air with damp heat is cooled at the same time, so that water vapor in the materials is condensed and discharged, but the mode can not fully utilize heat in the hot air, so that energy waste is caused.

Disclosure of utility model

The application provides a drying device which is used for solving the problem of energy waste caused by difficulty in fully utilizing heat when drying materials in the existing device for drying materials by hot air.

The application provides a drying device which comprises a crushing device, a scraper conveying device and a rotary drum drying device which are sequentially connected in series;

The scraper conveyer comprises a conveying trough and a steam heating bin arranged at the bottom of the conveying trough;

the rotary drum drying device is also connected with the hot air supply device, and the hot air output end of the rotary drum drying device is connected with the input end of the heat exchange medium of the steam heating bin.

Optionally, the crushing device comprises a crushing device body, wherein the crushing device body sequentially comprises a first crushing cavity, a stirring cavity and a second crushing cavity from top to bottom;

A first crushing roller is arranged in the first crushing cavity and comprises a first rotating shaft and a plurality of crushing blades arranged on the periphery of the first rotating shaft in an array manner, and the crushing blades are arranged at a certain angle with the first rotating shaft;

stirring paddles are arranged in the stirring cavity along the horizontal direction;

A pair of second crushing rollers are arranged in the second crushing cavity, each second crushing roller comprises a second rotating shaft and a plurality of cutting knives arranged on the periphery of the second rotating shaft in an array mode, and the cutting knives on the pair of second crushing rollers are meshed with each other.

Optionally, an upper return type scraper chain is arranged in the material conveying groove;

One end of the material conveying groove is provided with a feed hopper, the other end of the material conveying groove is provided with a discharge port, the top of the material conveying groove is provided with a wind collecting bin, and an axial flow fan is arranged in the wind collecting bin.

Optionally, a baffle plate is arranged in the steam heating bin.

Optionally, a liquid collecting cavity is arranged at the bottom of the steam heating bin, and the steam heating bin and the liquid collecting cavity are separated by a porous plate.

Optionally, the rotary drum drying device comprises a rotary drum, an input bin and an output bin which are respectively arranged at two ends of the rotary drum;

The periphery of the rotary drum is provided with a gear ring, and the gear ring is meshed with a gear on a power output shaft of the motor.

Optionally, the rotary drum comprises an inner cylinder and an outer cylinder which are coaxially arranged;

The inner wall of the inner cylinder is provided with a plurality of inner cylinder shoveling plates along the length direction of the inner cylinder in an array manner;

The inner wall of the inner cylinder is also connected with a plurality of grinding balls through flexible ropes;

The inner wall of the outer cylinder is spirally provided with a plurality of outer cylinder shoveling plates along the length direction of the outer cylinder.

Optionally, a hopper is arranged at the top of the input bin and is communicated with a guide chute arranged in the input bin, and an output port of the guide chute extends into the inner barrel;

The input bin being remote from the drum an exhaust port is formed in one side face;

The bottom of the output bin is provided with a discharge hole, one side surface of the output bin, which is far away from the rotary drum, is provided with an air inlet, and the air inlet is connected with the hot air supply device.

The application provides a drying device, wherein a steam heating bin is arranged at the bottom of a scraper conveyer, the hot air output end of a rotary drum drying device is connected with the steam heating bin, and hot air after the rotary drum drying device dries materials is input into the steam heating bin to preheat wet materials, so that waste heat in the hot air is further utilized. The device of the application recycles the heat in the hot air output by the rotary drum drying device through the cooperation of the structure, and overcomes the defect of energy waste caused by the difficulty in fully utilizing the heat when the traditional hot air drying device dries materials.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a drying apparatus according to an embodiment of the present application;

fig. 2 is a schematic structural view of a crushing device according to an embodiment of the present application;

FIG. 3 is a schematic view of a first crushing roller according to an embodiment of the present application;

FIG. 4 is a schematic view of a second crushing roller according to an embodiment of the present application;

FIG. 5 is a schematic view of a scraper conveyor according to an embodiment of the present application;

fig. 6 is a schematic front view of a drum drying device according to an embodiment of the present application;

Fig. 7 is a schematic perspective view of a drum drying device according to an embodiment of the present application;

FIG. 8 is a schematic view of the internal cross-sectional structure of a drum according to an embodiment of the present application;

FIG. 9 is a schematic perspective view of a drum according to an embodiment of the present application;

Fig. 10 is a schematic perspective view of an input bin according to an embodiment of the application.

Reference numerals illustrate:

1. The device comprises a crushing device, a scraper conveying device, a3, a drum drying device, a4, a hot air supply device, a 10, a crushing device body, a 11, a first crushing cavity, a 12, a stirring cavity, a 13, a second crushing cavity, a 21, a conveying trough, a 22, a steam heating bin, a 23, a liquid collecting cavity, a 31, a drum, a 32, an input bin, a 33, an output bin, a 34, a gear ring, a 35, a motor, a 111, a first crushing roller, a 112, crushing blades, a 121, a stirring paddle, a 131, a second crushing roller, a 211, an upper return type scraper chain, a 212, a feed hopper, a 213, a discharge opening, a 214, a wind collecting bin, a 215, an axial fan, a 221, a baffle plate, a 222, a porous plate, a 311, an inner drum, a 312, an outer drum, a 321, a hopper, a 322, a guide trough, a 1111, a first rotating shaft, a 1311, a second rotating shaft, a 1312, a cutter blade, a1, a sieve opening, a 3111, an inner drum 3112, a flexible rope, a 3113, a grinding ball 3121, an outer drum plate, a 3201, an air vent, a 3301, an air inlet and an air inlet.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are also within the scope of the application.

As shown in fig. 1, the present application provides a drying apparatus comprising a crushing apparatus 1, a scraper conveyor 2 and a drum drying apparatus 3 connected in series in this order;

the scraper conveyer 2 comprises a conveying chute 21 and a steam heating bin 22 arranged at the bottom of the conveying chute 21;

the drum drying device 3 is also connected with a hot air supply device 4, and the hot air output end of the drum drying device 3 is connected with the input end of the heat exchange medium of the steam heating bin 22.

In the application, the steam heating bin 22 is not communicated with the material conveying groove 21, and heat transfer is carried out between the steam heating bin and the material conveying groove 21 through the bottom of the material conveying groove 21.

In the application, the hot air input end of the steam heating bin 22 is close to the output end of the material conveying groove 21, and the hot air output end is close to the input end of the material conveying groove 21, so that the hot air can realize countercurrent heat exchange with wet materials, and the energy utilization efficiency in the hot air is improved.

When the device is used, the filtered filter cake (such as target product obtained in the synthesis reaction) is added into the crushing device 1 to be crushed into filter cake blocks with smaller granularity.

The filter cake agglomerates crushed by the crushing device 1 fall into the material conveying groove 21 of the scraper conveying device 2, move to the output end of the material conveying groove 21 under the scraping action of the scraper in the material conveying groove 21, and meanwhile, the hot air with waste heat output from the drum drying device 3 enters the steam heating bin 22 to preheat the materials in the material conveying groove 21. The hot air in the steam heating bin 22 is output from an exhaust port at the other end of the steam heating bin 22 after heat exchange. The material preheated and transported by the scraper conveyor 2 is output from the output end of the material conveying chute 21.

The preheated material output from the scraper conveyor 2 is input from one end of the drum dryer 3 for drying, and the dried hot air supplied by the hot air supply device 4 is input from the other end of the drum dryer 3 into the drum dryer 3 for countercurrent contact with wet material for mass transfer and heat transfer, and the material is dried and output from the material output end of the drum dryer 3.

The hot and humid air after heat exchange in the drum dryer 3 is discharged from the hot air outlet and enters the scraper conveyor 2 to be reused.

The application provides a drying device, which is characterized in that a steam heating bin 22 is arranged at the bottom of a scraper conveyer 2, the hot air output end of a rotary drum drying device 3 is connected with the steam heating bin 22, and hot air after the rotary drum drying device 3 dries materials is input into the steam heating bin 22 to preheat wet materials, so that the waste heat in the hot air is further utilized. The device of the application recycles the heat in the hot air output by the rotary drum drying device 3 through the cooperation of the structure, and overcomes the defect of energy waste caused by difficulty in fully utilizing the heat when the traditional hot air drying device dries materials.

As shown in fig. 2 to 4, optionally, the crushing device 1 includes a crushing device body 10, and the crushing device body 10 includes a first crushing cavity 11, a stirring cavity 12, and a second crushing cavity 13 sequentially from top to bottom;

a first crushing roller 111 is arranged in the first crushing cavity 11, the first crushing roller 111 comprises a first rotating shaft 1111 and a plurality of crushing blades 112 arranged on the periphery of the first rotating shaft 1111 in an array, and the crushing blades 112 are arranged at a certain angle with the first rotating shaft 1111;

A stirring paddle 121 is arranged in the stirring cavity 12 along the horizontal direction;

A pair of second crushing rollers 131 are arranged in the second crushing cavity 13, the second crushing rollers 131 comprise a second rotating shaft 1311 and a plurality of cutting knives 1312 arranged on the periphery of the second rotating shaft 1311 in an array mode, and the cutting knives 1312 on the pair of second crushing rollers 131 are meshed with each other.

In the application, because the filter cakes obtained in production are mostly filter cakes obtained by filter pressing or suction filtration, most of the filter cakes are large blocks and have relatively hard textures, the direct drying is slow in drying speed and energy-wasting, and the filter cakes are agglomerated in the drying process, so that the large block materials with hard textures are finally obtained, and the processes of subsequent split charging, continuous reaction and the like are influenced. Therefore, the agglomerated wet material must be broken up before drying to overcome the above-mentioned drawbacks.

When in use, the filtered filter cake (such as a target product obtained in the synthesis reaction) is added into the crushing device 1, and is firstly crushed in the first crushing cavity 11 of the crushing device 1 by the crushing blades 112 on the first crushing roller 111, the crushed filter cake falls into the stirring cavity 12, is further crushed and stirred by the stirring paddles 121 arranged horizontally, falls into the second crushing cavity 13 after being crushed again, and is crushed into filter cake blocks with smaller granularity under the shearing of the meshed cutting blades 1312 on the pair of second crushing rollers 131 in the second crushing cavity 13.

As shown in fig. 5, optionally, an upper return scraper chain 211 is arranged in the material conveying groove 21;

One end of the material conveying trough 21 is provided with a feed hopper 212, the other end is provided with a discharge port 213, the top of the material conveying trough 21 is provided with a wind collecting bin 214, and an axial flow fan 215 is arranged in the wind collecting bin 214.

In the application, as the wet materials in the material conveying groove 21 can generate steam after being heated, the wind collecting bin 214 is arranged at the top of the material conveying groove 21, and the axial flow fan 215 is arranged in the wind collecting bin 214, and the steam can be discharged through the axial flow fan 215 for treatment or discharge.

As shown in fig. 5, a baffle 221 is optionally provided within the steam heating compartment 22.

In the application, the baffle 221 is arranged in the steam heating bin 22, so that the travelling path of the hot air with the waste heat can be prolonged, and the waste heat in the hot air can be fully utilized.

As shown in fig. 5, the bottom of the steam heating bin 22 is optionally provided with a liquid collecting cavity 23, and the steam heating bin 22 and the liquid collecting cavity 23 are separated by a porous plate 222.

In the application, the hot air in the steam heating bin 22 goes along a path enclosed by the baffle plates 221 in a zigzag way, moisture contained in the hot air after heat exchange is condensed into liquid drops which fall into the liquid collecting cavity 23 through the porous plate 222, and the hot air after heat exchange is output from the air outlet at the other end of the steam heating bin 22. The material preheated and transported by the scraper conveyor 2 is output from the discharge opening 213 of the material conveying chute 21.

As shown in fig. 6 and 7, the drum drying device 3 may alternatively include a drum 31, an input bin 32 and an output bin 33 provided at both ends of the drum 31, respectively;

The outer periphery of the drum 31 is provided with a ring gear 34, and meshes with a gear on a power output shaft of the motor 35 through the ring gear 34.

In the present application, the drum 31 is a main structure of the dry material, and the wet material is dried in the drum 31. The ring gear 34 meshes with a gear for transmitting power output from the motor 35. The input bin 32 is the input of material and the output bin 33 is the output of material, both of which are in communication with the bowl 31. The drum 31 is rotatably connected to an input bin 32 and an output bin 33.

As shown in fig. 8 and 9, the drum 31 may alternatively include an inner cylinder 311 and an outer cylinder 312 coaxially disposed, the inner cylinder 311 and the outer cylinder 312 being equal in length;

The inner cylinder 311 is provided with a plurality of sieve holes 3101 in a penetrating way, and the inner wall of the inner cylinder 311 is provided with a plurality of inner cylinder shovelling plates 3111 in an array along the length direction of the inner cylinder 311;

the inner wall of the inner cylinder 311 is also connected with a plurality of grinding balls 3113 through flexible ropes 3112;

The inner wall of the outer tub 312 is spirally arranged with a plurality of outer tub forming plates 3121 along the length direction of the outer tub 312.

In the present application, the inner cylinder 311 is fixedly connected to the outer cylinder 312 by a fixing means such as a connecting rib or the like. The plurality of outer tub forming plates 3121 on the inner wall of the outer tub 312 are spirally arranged along the length direction of the outer tub 312, so that the outer tub forming plates 3121 perform a material transporting function while lifting up materials. The material entering the inner cylinder 311 is lifted along with the inner cylinder shoveling plate 3111, and undergoes mass transfer and heat transfer with hot air, so that moisture in the material is taken away, the material is agglomerated in the drying process, so that the grinding balls 3113 connected in the inner cylinder 311 by the flexible ropes 3112 play a role in grinding and crushing the blocky material in the inner cylinder 311 in the process of rotating along with the inner cylinder 311, and the material smaller than the screen holes 3101 falls into the outer cylinder 312 through the screen holes because the inner cylinder 311 is provided with a plurality of screen holes 3101, so that the material is prevented from being excessively crushed by the grinding balls 3113 in the inner cylinder 311. The flexible rope 3112 acts to restrain the grinding balls 3113, preventing the grinding balls 3113 from being expelled with the material during use of the drum 31.

Wherein, inner tube 311 communicates with input storehouse 32, and urceolus 312 communicates with output storehouse 33 for the material gets into inner tube 311 by input storehouse 32, reentrant urceolus 312, gets into output storehouse 33 from urceolus 312, has guaranteed the drying effect of material. In addition, a ring of baffle rings may be provided at both ends of the inner cylinder 311 to prevent the material fed into the inner cylinder 311 from falling into the outer cylinder 312 or into the output bin 33 from both ends without being crushed, and in general, it should be ensured that the material to be dried is fed into the inner cylinder 311 and the dried material is fed from the outer cylinder 312 into the output bin 33 when in use.

As shown in fig. 10, optionally, a hopper 321 is arranged at the top of the input bin 32, and the hopper 321 is communicated with a guide chute 322 arranged inside the input bin 32, wherein an output port of the guide chute 322 extends into the inner barrel 311;

an exhaust port 3201 is formed on one side surface of the input bin 32, which is far away from the rotary drum 31;

as shown in fig. 6 and 7, a discharge port 3301 is formed in the bottom of the output bin 33, an air inlet 3302 is formed in a side surface, away from the drum 31, of the output bin 33, and the air inlet 3302 is connected with the hot air supply device 4.

In the application, when in use, the preheated materials output from the discharge opening 213 enter a hopper 321 on an input bin 32 of the rotary drum drying device 3 and are input into an inner drum 311 along a guide chute 322, and simultaneously, a motor 35 is started to drive the rotary drum 31 to rotate through the meshing of a gear and a gear ring 34, and the dry hot air from a hot air supply device 4 enters the rotary drum 31 from an air inlet 3302 formed on an output bin 33.

The material entering the inner cylinder 311 is lifted along with the inner cylinder shoveling plate 3111, and undergoes mass transfer and heat transfer with hot air, so that moisture in the material is taken away, the material is agglomerated in the drying process, so that the grinding balls 3113 connected in the inner cylinder 311 by the flexible ropes 3112 play a role in grinding and crushing the blocky material in the inner cylinder 311 in the process of rotating along with the inner cylinder 311, and the material smaller than the screen holes 3101 falls into the outer cylinder 312 through the screen holes because the inner cylinder 311 is provided with a plurality of screen holes 3101, so that the material is prevented from being excessively crushed by the grinding balls 3113 in the inner cylinder 311.

The material falling into the outer cylinder 312 is lifted by the outer cylinder plate 3121 on the inner wall of the outer cylinder 312 along with the rotation of the outer cylinder 312, and transfer heat with hot air, so as to realize the drying of the material, and the material can gradually move to the direction of the output bin 33 along the spiral line formed by the outer cylinder plate 3121 of the spiral array during the rotation of the outer cylinder because the outer cylinder plate 3121 is spirally arrayed on the inner wall of the outer cylinder 312 along the length direction of the outer cylinder 312.

A drying device is used as follows:

When in use, the filtered filter cake (such as a target product obtained in the synthesis reaction) is added into the crushing device 1, firstly enters the first crushing cavity 11 of the crushing device 1, is crushed by the crushing blades 112 on the first crushing roller 111, falls into the stirring cavity 12, is subjected to further crushing and stirring by the stirring paddles 121 arranged horizontally, falls into the second crushing cavity 13, and is crushed into filter cake clusters with smaller granularity under the shearing of the meshed cutting knives 1312 on the pair of second crushing rollers 131 in the second crushing cavity 13.

The filter cake agglomerates crushed by the crushing device 1 fall into a feed hopper 212 of the scraper conveying device 2 and fall into a conveying chute 21, the filter cake agglomerates move along the output end of the conveying chute 21 under the scraping action of a scraper in an upper return type scraper chain 211 in the conveying chute 21, meanwhile, hot air with waste heat output by the drum drying device 3 enters a steam heating bin 22 to preheat materials in the conveying chute 21, and meanwhile, an axial flow fan 215 in an air collecting bin 214 is started to suck and discharge steam generated by heating the materials in the conveying chute 21. The hot air in the steam heating bin 22 goes along a path enclosed by the baffle plates 221 in a zigzag way, moisture contained in the hot air after heat exchange is condensed into liquid drops, the liquid drops fall into the liquid collecting cavity 23 through the porous plate 222, and the hot air after heat exchange is output from the air outlet at the other end of the steam heating bin 22. The material preheated and transported by the scraper conveyor 2 is output from the discharge opening 213 of the material conveying chute 21.

The preheated material output from the discharge opening 213 enters a hopper 321 on an input bin 32 of the drum drying device 3 and is input into the inner drum 311 along a guide chute 322, and simultaneously, a motor 35 is started to drive the drum 31 to rotate through the meshing of a gear and a gear ring 34, and the drying hot air from the hot air supply device 4 enters the drum from an air inlet 3302 formed in an output bin 33.

The material entering the inner cylinder 311 is lifted along with the inner cylinder shoveling plate 3111, and undergoes mass transfer and heat transfer with hot air, so that moisture in the material is taken away, the material is agglomerated in the drying process, so that the grinding balls 3113 connected in the inner cylinder 311 by the flexible ropes 3112 play a role in grinding and crushing the blocky material in the inner cylinder 311 in the process of rotating along with the inner cylinder 311, and the material smaller than the screen holes 3101 falls into the outer cylinder 312 through the screen holes because the inner cylinder 311 is provided with a plurality of screen holes 3101, so that the material is prevented from being excessively crushed by the grinding balls 3113 in the inner cylinder 311.

The material falling into the outer cylinder 312 is lifted by the outer cylinder plate 3121 on the inner wall of the outer cylinder 312 along with the rotation of the outer cylinder 312, and transfer heat with hot air, so as to realize the drying of the material, and the material can gradually move to the direction of the output bin 33 along the spiral line formed by the outer cylinder plate 3121 of the spiral array during the rotation of the outer cylinder because the outer cylinder plate 3121 is spirally arrayed on the inner wall of the outer cylinder 312 along the length direction of the outer cylinder 312. The dried material is output from the discharge port 3301 at the bottom of the output bin 33, and is stored after being cooled or is produced later.

The hot and humid air exchanged in the drum 31 is discharged from the exhaust port 3201 formed in the inlet bin 32, and enters the steam heating bin 22 in the scraper conveyor 2 to be reused.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present application, and not for limiting the same, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not deviate the essence of the corresponding technical solution from the scope of the technical solution of the embodiments of the present application.

Claims (8)

1. The drying device is characterized by comprising a crushing device (1), a scraper conveying device (2) and a drum drying device (3) which are sequentially connected in series;

The scraper conveying device (2) comprises a conveying trough (21) and a steam heating bin (22) arranged at the bottom of the conveying trough (21);

the rotary drum drying device (3) is also connected with the hot air supply device (4), and the hot air output end of the rotary drum drying device (3) is connected with the input end of the heat exchange medium of the steam heating bin (22).

2. The drying device according to claim 1, wherein the crushing device (1) comprises a crushing device body (10), and the crushing device body (10) comprises a first crushing cavity (11), a stirring cavity (12) and a second crushing cavity (13) from top to bottom in sequence;

A first crushing roller (111) is arranged in the first crushing cavity (11), the first crushing roller (111) comprises a first rotating shaft (1111) and a plurality of crushing blades (112) arranged on the periphery of the first rotating shaft (1111) in an array manner, and the crushing blades (112) are arranged at a certain angle with the first rotating shaft (1111);

a stirring paddle (121) is arranged in the stirring cavity (12) along the horizontal direction;

A pair of second crushing rollers (131) are arranged in the second crushing cavity (13), each second crushing roller (131) comprises a second rotating shaft (1311) and a plurality of cutting knives (1312) arranged on the periphery of the second rotating shaft (1311) in an array mode, and the cutting knives (1312) on the pair of second crushing rollers (131) are arranged in an intermeshing mode.

3. Drying apparatus according to claim 1, characterized in that an upper return scraper chain (211) is arranged in the conveying chute (21);

One end of the material conveying groove (21) is provided with a feed hopper (212), the other end of the material conveying groove is provided with a discharge hole (213), the top of the material conveying groove (21) is provided with a wind collecting bin (214), and an axial flow fan (215) is arranged in the wind collecting bin (214).

4. Drying apparatus according to claim 1, wherein a baffle (221) is provided in the steam heating compartment (22).

5. Drying apparatus according to claim 1, wherein the bottom of the steam heating compartment (22) is provided with a liquid collecting chamber (23), the steam heating compartment (22) and the liquid collecting chamber (23) being separated by a perforated plate (222).

6. The drying device according to any one of claims 1 to 5, wherein the drum drying device (3) comprises a drum (31), an input bin (32) and an output bin (33) which are respectively arranged at two ends of the drum (31);

The periphery of the rotary drum (31) is provided with a gear ring (34), and the gear ring (34) is meshed with a gear on a power output shaft of a motor (35).

7. The drying apparatus according to claim 6, wherein the drum (31) comprises an inner cylinder (311) and an outer cylinder (312) coaxially arranged, the inner cylinder (311) and the outer cylinder (312) being equal in length;

The inner wall of the inner cylinder (311) is provided with a plurality of inner cylinder shoveling plates (3111) in an array along the length direction of the inner cylinder (311);

The inner wall of the inner cylinder (311) is also connected with a plurality of grinding balls (3113) through flexible ropes (3112);

The inner wall of the outer tube (312) is spirally provided with a plurality of outer tube shoveling plates (3121) along the length direction of the outer tube (312).

8. The drying device according to claim 7, characterized in that a hopper (321) is arranged at the top of the input bin (32), the hopper (321) is communicated with a guide chute (322) arranged inside the input bin (32), and an output port of the guide chute (322) extends into the inner cylinder (311);

An exhaust port (3201) is formed in one side surface, far away from the rotary drum (31), of the input bin (32);

The bottom of output storehouse (33) has seted up discharge gate (3301), output storehouse (33) are kept away from air intake (3302) have been seted up to a side of rotary drum (31), air intake (3302) with hot-blast feeding device (4) are connected.