A circulating dryer capable of separating coarse and fine materials

Abstract

The application provides a circulating dryer capable of separating coarse and fine materials, and relates to the technical field of drying, which comprises a drying roller, a storage box is rotatably installed at one end of the drying roller, a feeding hopper is rotatably installed at the other end of the drying roller, support assemblies for supporting the drying roller are arranged on both sides of the outer periphery of the drying roller, and a second rotary mounting seat is arranged at the bottom of the drying roller close to the side of the storage box. The material stored in the drying roller can be uniformly screened by the separating assembly, qualified materials are transferred to the storage box, and unqualified materials are transferred to the return screw pipe. The drying roller can rotate, so that the materials in the return screw pipe are returned, thereby effectively reducing the residence time of the materials, reducing the unit energy consumption, improving the hourly output, and realizing low-carbon, energy-saving and environmentally-friendly production of material drying and cooling.

Description

TECHNICAL FIELD

[0001] The present application relates to the drying technical field, and in particular to a circulating dryer capable of separating coarse and fine materials. BACKGROUND

[0002] When some materials are processed, in order to ensure that subsequent processing is faster, a material drying or cooling method is needed to dry the materials, which is more convenient for subsequent processing. At present, the material drying and cooling method is that after the material is fed, it is rolled with the cylinder and then moves to the low end to be discharged from the discharge port. However, this method cannot ensure that all materials meet the requirements during operation, especially large materials, or in order to accommodate a small part of the material flow, the residence time needs to be extended, thereby increasing the unit energy consumption, which is not conducive to low carbon and energy saving, and the overall processing time is also relatively long. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a circulating dryer capable of separating coarse and fine materials, which solves the problem that the prior art cannot quickly and energy-efficiently dry different materials during production.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0005] A circulating dryer capable of separating coarse and fine materials, comprising a drying drum, a storage tank is rotatably installed at one end of the drying drum, an inlet hopper is rotatably installed at the other end of the drying drum, support assemblies for supporting the drying drum are arranged on both sides of the outer periphery of the drying drum, a second rotary mounting seat is arranged at the bottom of the drying drum near the storage tank, a driving motor is fixedly installed on the upper surface of the second rotary mounting seat, a speed reducer is connected to the output end of the driving motor, a transmission gear is fixedly installed on the output end of the speed reducer, a driven gear for meshing transmission with the transmission gear is fixedly installed on the outer periphery of the drying drum near the transmission gear, a return screw pipe for returning coarse materials is integrally arranged on the outer periphery of the drying drum between the two support assemblies, a separation assembly for separating coarse and fine materials is fixedly installed on the inner wall of the drying drum, and the separation assembly is connected to one side of the return screw pipe.

[0006] Preferably, the separation assembly comprises a fixed ring, a plurality of partition plates are integrally arranged on the outer periphery of the fixed ring, side connecting plates are fixedly installed on both sides of each partition plate, a placement cavity is arranged between every two adjacent partition plates, a coarse material guide plate for returning materials and a fine material guide plate for entering materials are sequentially arranged in the plurality of placement cavities, and a blocking plate for preventing material leakage is arranged on one side of the fixed ring.

[0007] As preferred, one side of the side connecting plate is fixedly installed with a mounting main plate, and the other side of the side connecting plate is fixedly installed with a sealing cover plate. A discharging through hole is formed in one side of the surface of the sealing cover plate, and a return connecting pipe for transferring the coarse materials into the return screw pipe is fixedly installed in the discharging through hole.

[0008] As preferred, the surface of the mounting main plate is equidistantly installed with a plurality of arc-shaped expansion shells. The end of each arc-shaped expansion shell is sealingly connected with a corresponding coarse material guide plate. Each coarse material guide plate is located between two corresponding arc-shaped expansion shells, and is in communication with the inside of the sealing cover plate.

[0009] As preferred, the inside of each arc-shaped expansion shell is throughly formed with a fine material pre-storage groove. Each fine material pre-storage groove is in communication with the fine material guide plate. An arc-shaped guide plate for guiding the position of the material is fixedly installed on one side of the inner wall of each fine material pre-storage groove. A plurality of second fine material screening holes for screening the material are throughly formed in the plate body of each arc-shaped guide plate.

[0010] As preferred, the plate body of the mounting main plate is throughly formed with a plurality of first fine material screening holes. A plurality of groups of connecting through holes are throughly formed in the plate body of the mounting main plate. Each group of connecting through holes is located on both sides of the arc-shaped expansion shell.

[0011] As preferred, a fixed insertion rod is installed in each connecting through hole. A stabilizing plate for stabilizing the arc-shaped expansion shell is commonly installed on the rod body of each group of fixed insertion rods. A fixed through hole for connecting with the fixed insertion rod is formed in both sides of the plate body of each stabilizing plate.

[0012] As preferred, a wheel belt is integrally arranged on the surface of the drying drum near one side of the supporting assembly. A coarse material feeding port is throughly formed in the barrel body of the drying drum near one side of the feeding hopper. The coarse material feeding port is integrally connected with one end of the return screw pipe. The other end of the return screw pipe is integrally connected with the return connecting pipe.

[0013] As preferred, a hinge is fixedly installed on the inner wall of the drying drum near the coarse material feeding port. A sealing door for preventing the material from flowing back into the return screw pipe is fixedly installed on one end of the hinge. An opening and closing limiting frame for limiting the opening and closing angle of the sealing door is arranged on the upper side of the hinge.

[0014] As preferred, each supporting assembly comprises a first rotating mounting seat. Each first rotating mounting seat is arranged on both sides of the bottom of the drying drum. A supporting rotating wheel for rotating with the wheel belt is rotatably installed on the middle part of the upper surface of each first rotating mounting seat. A limiting stop wheel for limiting the side of the wheel belt is rotatably installed on both sides of the upper surface of each first rotating mounting seat.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. The material stored in the drying drum can be uniformly screened by the separation assembly, and the qualified material is transferred to the storage box, and the unqualified material is transferred to the return screw pipe. The return screw pipe can rotate, so that the material in the return screw pipe returns, thereby effectively reducing the residence time of the material flow during processing, reducing the unit energy consumption, improving the production per hour, realizing low-carbon, energy-saving and environmentally friendly production of material drying and cooling, and thereby not needing to accommodate a small part of large materials, so that the material flow rate is accelerated, the heat exchange efficiency is improved, low-carbon and environmentally friendly production is realized, and the influence on the environment is effectively reduced.

[0017] 2. The return screw pipe is arranged between the coarse material inlet and the return connecting pipe, so that the material in the return connecting pipe can be transferred to the coarse material inlet, and the coarse material is transferred to the drying drum for circulation processing. In order to prevent material backflow, the sealing door is connected by a hinge, and under the limiting of the opening and closing limiting frame, the material in the return screw pipe falls when the sealing door is above. When the sealing door is below, the sealing door is sealed and closed with the coarse material inlet by gravity, so that the connection between the sealing door and the return screw pipe is disconnected.

[0018] 3. The support assembly can support the position of the drying drum. In order to make the drying drum more stable during rotation, the assembly can rotate with the drying drum, so that the drying drum does not deviate during rotation, thereby enhancing the stability of the drying drum during operation. The limiting stop wheel can limit the two sides of the wheel belt to prevent position deviation during operation. The supporting rotating wheel can rotate with the wheel belt to support the drying drum during rotation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the present application of a circulating dryer capable of separating coarse and fine materials;

[0020] Figure 2 It is a drying drum structure schematic view of the present application of a circulating dryer capable of separating coarse and fine materials;

[0021] Figure 3 It is a drying drum internal structure schematic view of the present application of a circulating dryer capable of separating coarse and fine materials;

[0022] Figure 4 It is a separation assembly structure schematic view of the present application of a circulating dryer capable of separating coarse and fine materials;

[0023] Figure 5Front view structure schematic diagram of separating assembly of the present invention of the circulating dryer capable of separating coarse and fine materials;

[0024] Figure 6 Front view structure schematic diagram of separating assembly of the present invention of the circulating dryer capable of separating coarse and fine materials Figure 5 Sectional view structure schematic diagram at A-A of the present invention of the circulating dryer capable of separating coarse and fine materials;

[0025] Figure 7 Front view structure schematic diagram of separating assembly of the present invention of the circulating dryer capable of separating coarse and fine materials Figure 5 Sectional view structure schematic diagram at B-B of the present invention of the circulating dryer capable of separating coarse and fine materials;

[0026] Figure 8 Structure schematic diagram of fixed ring of the present invention of the circulating dryer capable of separating coarse and fine materials;

[0027] Figure 9 Internal structure schematic diagram of fixed ring of the present invention of the circulating dryer capable of separating coarse and fine materials;

[0028] Figure 10 Structure schematic diagram of coarse material feeding port of the present invention of the circulating dryer capable of separating coarse and fine materials;

[0029] Figure 11 Front view structure schematic diagram of separating assembly of the present invention of the circulating dryer capable of separating coarse and fine materials Figure 10 Enlarged structure schematic diagram at A of the present invention of the circulating dryer capable of separating coarse and fine materials.

[0030] In the figure: 1, drying roller; 101, wheel belt; 102, driven gear; 103, return material threaded pipe; 104, coarse material feeding port; 105, opening and closing limiting frame; 106, hinge; 107, sealing door; 2, separating assembly; 201, installation main plate; 202, side edge connecting plate; 2021, sealing cover plate; 2022, material discharging through hole; 2023, coarse material guide plate; 2024, fixed ring; 2025, partition plate; 2026, fine material guide plate; 2027, blocking plate; 2028, installation cavity; 203, arc-shaped expansion shell; 2031, arc-shaped guide plate; 2032, second fine material screening hole; 2033, fine material pre-storage groove; 204, stabilizing plate; 2041, fixed through hole; 205, fixed insertion rod; 206, first fine material screening hole; 207, connecting through hole; 3, supporting assembly; 301, first rotation installation seat; 302, limiting stop wheel; 303, supporting rotation wheel; 4, second rotation installation seat; 401, driving motor; 402, speed reducer; 403, transmission gear; 5, feeding hopper; 6, storage tank; 7, return material connecting pipe. DETAILED DESCRIPTION

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] Example

[0033] like Figures 1 to 11 As shown, a circulating dryer capable of separating coarse and fine materials includes a drying drum 1. A storage box 6 is rotatably mounted at one end of the drying drum 1, and a feed funnel 5 is rotatably mounted at the other end of the drying drum 1. Support components 3 for supporting the drying drum 1 are respectively provided on both sides of the outer periphery of the drying drum 1. A second rotating mounting seat 4 is provided at the bottom of the drying drum 1 near the storage box 6. A drive motor 401 is fixedly mounted on the upper surface of the second rotating mounting seat 4. A reducer 402 is connected to the output end of the drive motor 401. A transmission gear 403 is fixedly mounted at the output end of the reducer 402. A driven gear 102 for meshing with the transmission gear 403 is fixedly mounted on the outer periphery of the drying drum 1 near the transmission gear 403. A return threaded pipe 103 for sending coarse materials back is integrally provided on the outer periphery of the drying drum 1 located between the two support components 3. A separation component 2 for separating coarse and fine materials is fixedly mounted on the inner wall of the drying drum 1. The separation component 2 is connected to one side of the return threaded pipe 103. By starting the drive motor 401 and cooperating with the reducer 402, the transmission gear 403 is driven to rotate. When the transmission gear 403 rotates, it meshes with the driven gear 102 to drive the drying drum 1 to rotate under the support of the support assembly 3, thereby realizing the cyclical flipping operation of the material.

[0034] In the embodiment, the separating assembly 2 comprises a fixing ring 2024, a plurality of partition plates 2025 are integrally arranged on the outer periphery of the fixing ring 2024, a side connecting plate 202 is fixedly installed on each side of each partition plate 2025, a placing cavity 2028 is arranged between every two adjacent partition plates 2025, a coarse material guiding plate 2023 for returning material and a fine material guiding plate 2026 for entering material are sequentially arranged in the plurality of placing cavities 2028, and a blocking plate 2027 for preventing material leakage is arranged on one side of the fixing ring 2024. The separating assembly 2 can uniformly screen the material stored in the drying drum 1, transfer the qualified material to the storage box 6, and also transfer the unqualified material to the return screw pipe 103. The drying drum 1 can rotate, so that the material in the return screw pipe 103 is returned, thereby effectively reducing the residence time of the material flow during processing, reducing the unit energy consumption, improving the production per hour, realizing low-carbon, energy-saving and environmentally friendly production of material drying and cooling, and further not needing to accommodate a small part of the large material, so that the material flow rate is accelerated, the heat exchange efficiency is improved, low-carbon and environmentally friendly production is realized, and the influence on the environment is effectively reduced.

[0035] In the specific arrangement, the surface of one side connecting plate 202 is fixedly installed with a mounting main plate 201, the mounting main plate 201 is fixedly installed on one side of the inner wall of the drying drum 1, the surface of the other side connecting plate 202 is fixedly installed with a sealing cover plate 2021, a discharging through hole 2022 is formed in one side of the surface of the sealing cover plate 2021, and a return connecting pipe 7 for transmitting coarse material into the return screw pipe 103 is fixedly installed in the discharging through hole 2022. The material in the coarse material guiding plate 2023 can be uniformly transferred into the sealing cover plate 2021, the material in the fine material guiding plate 2026 can be uniformly transferred into the subsequent drying drum 1, the coarse material collected by the sealing cover plate 2021 can be temporarily stored and transferred into the return connecting pipe 7 through the discharging through hole 2022, and the preliminary transfer operation of the coarse material is realized.

[0036] It should be noted that the surface of the mounting main plate 201 is equidistantly mounted with a plurality of arc-shaped expansion shells 203, the end of each arc-shaped expansion shell 203 is sealingly connected with the corresponding fine material guide plate 2026, each coarse material guide plate 2023 is located between the corresponding two arc-shaped expansion shells 203, each coarse material guide plate 2023 is in communication with the inside of the sealing cover plate 2021, and the inside of each arc-shaped expansion shell 203 is penetrated to form a fine material pre-storage groove 2033, each fine material pre-storage groove 2033 is in communication with the fine material guide plate 2026, and an arc-shaped guide plate 2031 for guiding the position of the material is fixedly installed on one side of the inner wall of each fine material pre-storage groove 2033. A plurality of second fine material screening holes 2032 for screening the material are formed in the plate body of each arc-shaped guide plate 2031. The arc-shaped guide plate 2031 is arranged in the arc-shaped expansion shell 203, so that the material in the current position can be guided in position, and the second fine material screening hole 2032 is used in the guiding process to transfer the material meeting the fine material standard to the fine material pre-storage groove 2033, and then the material in the fine material pre-storage groove 2033 is transferred into the corresponding fine material guide plate 2026, wherein the material that does not meet the condition is transferred to the corresponding coarse material guide plate 2023 under the action of the arc-shaped guide plate 2031, so that the assembly can realize the coarse and fine separation of the material.

[0037] It can be understood that in the present application, the plate body of the mounting main plate 201 is penetrated to form a plurality of first fine material screening holes 206, the plate body of the mounting main plate 201 is penetrated to form a plurality of groups of connecting through holes 207, each group of connecting through holes 207 is located on both sides of the arc-shaped expansion shell 203, and each connecting through hole 207 is internally mounted with a fixed insertion rod 205. Each group of fixed insertion rods 205 has a stabilizing plate 204 for stabilizing the arc-shaped expansion shell 203, and each stabilizing plate 204 has a fixing through hole 2041 formed on both sides of the plate body for connecting with the fixed insertion rod 205. The position of the stabilizing plate 204 can be fixed by arranging the coarse material guide plate 2023, so that the stabilizing plate 204 can reinforce the arc-shaped expansion shell 203, so that the service life is improved.

[0038] The surface of the drying roller 1 near the support assembly 3 is integrally provided with a wheel belt 101, the barrel of the drying roller 1 near the inlet hopper 5 is provided with a coarse material inlet 104, the coarse material inlet 104 is integrally connected with one end of the return material threaded pipe 103, the other end of the return material threaded pipe 103 is integrally connected with the return material connecting pipe 7, the inner wall of the drying roller 1 near the coarse material inlet 104 is fixedly installed with a hinge 106, one end of the hinge 106 is fixedly installed with a sealing door 107 for preventing material from flowing back into the return material threaded pipe 103, and the upper side of the hinge 106 is provided with an opening and closing limiting frame 105 for limiting the opening angle of the sealing door 107. The return material threaded pipe 103 is arranged between the coarse material inlet 104 and the return material connecting pipe 7, so that the material in the return material connecting pipe 7 can be transferred to the coarse material inlet 104, and the coarse material is transferred to the drying roller 1 for recycling, in order to prevent material from flowing back, the sealing door 107 is connected with the hinge 106, and under the limiting of the opening and closing limiting frame 105, the material in the return material threaded pipe 103 falls when the sealing door 107 is above, and the sealing door 107 is sealed and closed with the coarse material inlet 104 by using gravity when the sealing door 107 is below, so that the connection between the sealing door 107 and the return material threaded pipe 103 is disconnected.

[0039] It should be noted that each support assembly 3 comprises a first rotating mounting seat 301, each first rotating mounting seat 301 is arranged on both sides of the bottom of the drying roller 1, a support rotating wheel 303 for rotating with the wheel belt 101 is rotatably installed on the upper surface of each first rotating mounting seat 301, and a limiting stop wheel 302 for limiting the side edges of the wheel belt 101 is rotatably installed on both sides of the upper surface of each first rotating mounting seat 301. The support assembly 3 can support the position of the drying roller 1, and in order to make the drying roller 1 more stable during rotation, the assembly can rotate with the drying roller 1, so that the drying roller 1 does not deviate during rotation, thereby enhancing the stability of the drying roller 1 during operation; the limiting stop wheel 302 can limit both sides of the wheel belt 101 to prevent deviation during operation, and the support rotating wheel 303 can rotate with the wheel belt 101 to support the drying roller 1 during rotation.

[0040] The working principle of the recycling dryer capable of separating coarse and fine materials is as follows:

[0041] In use, first, the raw materials are stored in the feeding hopper 5 and transferred into the drying drum 1, then the temperature inside the drying drum 1 is adjusted according to the requirements to realize the preliminary drying of the materials, wherein the materials are fed into the drying drum 1 in the form of large pieces, small pieces and powder, and the materials and the airflow are fully exchanged to realize the drying or cooling of the materials, then the driving motor 401 is started and the drying drum 1 is rotated under the cooperation with the support assembly 3 to strengthen the exchange of the materials and the airflow, then the materials are transferred into the separation assembly 2, the separation assembly 2 is also rotated through the rotation of the drying drum 1, the arc-shaped guide plate 2031 is arranged in the arc-shaped expansion shell 203, so that the materials at the current position can be guided, and the second fine material screening hole 2032 is utilized in the guiding process to transfer the materials meeting the fine material standard into the fine material pre-storage groove 2033, and the materials in the fine material pre-storage groove 2033 are transferred into the corresponding fine material guide plate 2026, and then the dried materials are transferred into the storage box 6;

[0042] The materials not meeting the conditions are transferred into the corresponding coarse material guide plate 2023 under the action of the arc-shaped guide plate 2031, and then the materials in the coarse material guide plate 2023 are uniformly transferred into the sealing cover plate 2021 and the collected coarse materials are temporarily stored in the sealing cover plate 2021 and transferred into the return material connecting pipe 7 through the discharge through hole 2022 to realize the preliminary transfer of the coarse materials;

[0043] The materials in the return material connecting pipe 7 are transferred into the return material screw pipe 103, and the materials are pushed into the coarse material feeding port 104 at the front end to enter the cylinder for heat exchange again, wherein the sealing door 107 is connected to the hinge 106 and is limited by the opening and closing limiting frame 105, so that the materials in the return material screw pipe 103 fall when the sealing door 107 is above, and the sealing door 107 is sealed and closed with the coarse material feeding port 104 by gravity when the sealing door 107 is below.

[0044] It should be noted that the specific type and specifications of the driving motor 401 and the speed reducer 402 are determined according to the actual use requirements.

[0045] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application, and for those skilled in the art, other different forms of changes or variations can be made on the basis of the above description, and it is impossible to enumerate all the implementation modes here, and any obvious changes or variations derived from the technical solutions of the present application still fall within the protection scope of the present application.

Claims

1. A circulating dryer capable of separating coarse and fine materials, comprising a drying drum (1), characterized in that: The drying roller (1) is rotatably installed with a storage box (6) at one end, rotatably installed with an inlet hopper (5) at the other end, and provided with support assemblies (3) for supporting the drying roller (1) on both sides of the outer periphery of the drying roller (1), and provided with a second rotating mounting seat (4) at the bottom of the drying roller (1) near the storage box (6), wherein the upper surface of the second rotating mounting seat (4) is fixedly installed with a driving motor (401), the output end of the driving motor (401) is connected with a speed reducer (402), the output end of the speed reducer (402) is fixedly installed with a transmission gear (403), the outer periphery of the drying roller (1) near the transmission gear (403) is fixedly installed with a driven gear (102) for meshing transmission with the transmission gear (403), and the outer periphery of the drying roller (1) between the two support assemblies (3) is integrally provided with a return screw pipe (103) for returning coarse materials, and the inner wall of the drying roller (1) is fixedly installed with a separation assembly (2) for separating coarse and fine materials, and the separation assembly (2) is connected with one side of the return screw pipe (103); The separation assembly (2) comprises a fixed ring (2024), a plurality of partition plates (2025) are integrally arranged on the outer periphery of the fixed ring (2024), a side edge connecting plate (202) is fixedly installed on each side of each partition plate (2025), a placement cavity (2028) is arranged between every two adjacent partition plates (2025), a coarse material guide plate (2023) for returning materials and a fine material guide plate (2026) for entering materials are sequentially arranged in the plurality of placement cavities (2028), and a blocking plate (2027) for preventing material leakage is arranged on one side of the fixed ring (2024); One of the side edge connecting plates (202) is fixedly installed with a mounting main plate (201) on the surface, the mounting main plate (201) is fixedly installed on one side of the inner wall of the drying roller (1), and the other side edge connecting plate (202) is fixedly installed with a sealing cover plate (2021) on the surface, a discharge through hole (2022) is formed in the sealing cover plate (2021), and a return connecting pipe (7) for conveying coarse materials into the return screw pipe (103) is fixedly installed in the discharge through hole (2022); A plurality of arc expansion shells (203) are installed on the surface of the mounting main plate (201) at equal intervals, the end of each arc expansion shell (203) is sealingly connected with the corresponding fine material guide plate (2026), each coarse material guide plate (2023) is located between the corresponding two arc expansion shells (203), and each coarse material guide plate (2023) is in communication with the inside of the sealing cover plate (2021); A plurality of first fine material screening holes (206) are formed in the plate body of the mounting main plate (201), and a plurality of groups of connecting through holes (207) are formed in the plate body of the mounting main plate (201), and each group of connecting through holes (207) is located on both sides of the arc expansion shell (203). The surface of the drying roller (1) near one side of the supporting assembly (3) is integrally provided with a wheel belt (101), the barrel of the drying roller (1) near one side of the feeding funnel (5) is provided with a coarse material feeding port (104) penetratingly, the coarse material feeding port (104) is integrally connected with one end of a return material screw pipe (103), and the other end of the return material screw pipe (103) is integrally connected with a return material connecting pipe (7).

2. A circular dryer capable of separating coarse and fine materials according to claim 1, characterized in that: Each of the arc-shaped extension shells (203) is provided with a fine material pre-storage groove (2033) penetratingly, each of the fine material pre-storage grooves (2033) is communicated with a fine material guide plate (2026), an arc-shaped guide plate (2031) for guiding the position of the material is fixedly installed on one side of the inner wall of each of the fine material pre-storage grooves (2033), and the shell body of each of the arc-shaped guide plates (2031) is provided with a plurality of second fine material screening holes (2032) penetratingly.

3. A circular dryer capable of separating coarse and fine materials according to claim 1, characterized in that: Each of the connecting through holes (207) is provided with a fixed insertion rod (205), and the rod bodies of each group of the fixed insertion rods (205) are commonly provided with a stabilizing plate (204) for stabilizing the arc-shaped extension shell (203), and each of the stabilizing plates (204) is provided with a fixed through hole (2041) on both sides of the shell body for connecting with the fixed insertion rod (205).

4. A circular dryer capable of separating coarse and fine materials according to claim 1, characterized in that: The inner wall of the drying roller (1) near the coarse material feeding port (104) is fixedly installed with a hinge (106), one end of the hinge (106) is fixedly installed with a sealing door (107) for preventing the material from flowing back into the return material screw pipe (103), and the upper side of the hinge (106) is provided with an opening and closing limiting frame (105) for limiting the opening and closing angle of the sealing door (107).

5. A circular dryer capable of separating coarse and fine materials according to claim 1, characterized in that: Each of the supporting assemblies (3) comprises a first rotating mounting seat (301), each of the first rotating mounting seats (301) is arranged on both sides of the bottom of the drying roller (1), a supporting rotating wheel (303) for rotating with the wheel belt (101) is rotatably installed on the upper surface of each of the first rotating mounting seats (301), and a limiting stop wheel (302) for limiting the side edges of the wheel belt (101) is rotatably installed on both sides of the upper surface of each of the first rotating mounting seats (301).

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