Furfural raw material drying device with uniform heating function

Abstract

The utility model discloses a furfural raw material drying device capable of being heated uniformly, and relates to the field of processing equipment. The device comprises a bottom frame, a ceramic shell is arranged at the top of the bottom frame, and the ceramic shell and the bottom frame are installed in an overturning mode through a driving piece; a ceramic sleeve is coaxially assembled in the ceramic shell in the length direction, the two ends of the ceramic sleeve abut against the inner wall of the ceramic shell, and an induction heating coil is wound around the outer wall of the ceramic sleeve. The inner pipe wall of the ceramic sleeve is rotationally sleeved with a metal sleeve, the two ends of the metal sleeve penetrate through the ceramic shell, protrusions are evenly arranged on the inner pipe wall of the metal sleeve, sealing covers are detachably installed at the two ends of the metal sleeve, and ventilation openings are formed in the outer walls of the sealing covers; a power output device is assembled on the outer wall of the ceramic shell and is in driving connection with the metal sleeve. The drying device has the advantages that the ceramic shell can be turned over to facilitate loading and discharging of raw materials, heat loss of the ceramic sleeve is reduced through induction heating, the use cost is reduced, and the drying effect is improved.

Description

Technical Field

[0001] The utility model belongs to processing equipment, relates to the field of furfural production, and specifically relates to a uniformly heated furfural raw material drying device. Background Art

[0002] Furfural is an organic compound that was originally produced from rice bran and dilute acid for heating, hence the name furfural. Furfural is mainly used as an industrial solvent, and can also be used in synthetic plastics, medicine, agriculture and other industrial fields. The production of furfural is mainly through the hydrolysis reaction of corn cobs and other raw materials rich in polypentose under acidic conditions to convert polypentose into pentose, and then the pentose is dehydrated to produce furfural.

[0003] When using raw materials such as corn cobs to produce furfural, the raw materials will absorb moisture during collection, storage and transportation. The moisture in the raw materials will affect the subsequent chemical reaction rate and the quality of the product. If the moisture content of the raw materials is too high, the reaction rate will slow down and even cause unnecessary side reactions, reducing the yield and purity of furfural. Uneven moisture content in the raw materials will affect the uniformity and stability of the reaction. Therefore, the raw materials need to be dried.

[0004] When drying raw materials such as corn cobs, a blower is usually used to drive the airflow to flow at high speed, promote the evaporation of moisture on the surface of the raw materials, and dry the furfural raw materials. However, due to the accumulation of furfural raw materials, the drying efficiency is low and the drying effect is not ideal. Therefore, a dryer is now used to dry the furfural raw materials. The dryer is based on a drum structure design, which uses high-temperature hot air to directly contact the raw materials to achieve the drying of the raw materials. At the same time, the rotation of the dryer drum reduces the accumulation of raw materials, so that the raw materials can fully contact with the high-temperature hot air to improve the drying effect.

[0005] However, the existing dryer is horizontally designed and fixed in use, which makes it inconvenient to add raw materials into the drum and discharge the raw materials from the drum. In addition, the dryer usually uses electric heating or heat pump heating to heat the drum by heat conduction to dry the raw materials. Heat loss occurs during the conduction process, which increases energy consumption and usage costs. Utility Model Content

[0006] In order to solve the technical problems of inconvenience in adding and discharging raw materials and high energy consumption during raw material drying, the utility model provides a uniformly heated furfural raw material drying device. The reversible ceramic shell facilitates the loading and discharging of raw materials, and induction heating is used to reduce heat loss to the ceramic sleeve, reduce use costs, and improve drying effects.

[0007] The technical scheme adopted by the utility model is as follows: a uniformly heated furfural raw material drying device is provided, comprising a bottom frame, a ceramic shell is arranged on the top of the bottom frame, one side of the ceramic shell is rotatably hinged with the bottom frame, and the ceramic shell is flipped and installed with the bottom frame by means of a driving member; a ceramic sleeve is coaxially arranged in the length direction of the ceramic shell, both ends of the ceramic sleeve are abutted against the inner wall of the ceramic shell, and an induction heating coil is wound around the outer wall of the ceramic sleeve; a metal sleeve is rotatably sleeved on the inner tube wall of the ceramic sleeve, both ends of the metal sleeve penetrate the ceramic shell, the inner tube wall of the metal sleeve is uniformly provided with protrusions, both ends of the metal sleeve are detachably provided with covers, and the outer walls of the covers are provided with vents; a power output device is arranged on the outer wall of the ceramic shell, and the power output device is drivingly connected to the metal sleeve.

[0008] When loading raw materials into the metal sleeve, the driving part drives the ceramic shell to flip, so that the ceramic shell and the metal sleeve are tilted, and the side of the metal sleeve close to the rotation hinge position of the ceramic shell and the bottom frame is blocked by the cover, while the other side of the metal sleeve is open, so that it is convenient to put the raw materials into the metal sleeve and slide them down to the bottom for accumulation along the metal sleeve, so as to facilitate the loading of raw materials. After loading, the cover blocks both ends of the metal sleeve, and the driving part pulls the ceramic shell to a horizontal position. At this time, the induction heating coil is energized to operate, and the metal sleeve is inductively heated. The induction heating coil moves along the ceramic The sleeve is wound in the length direction, and the metal sleeve is heated evenly and quickly. At the same time, the power output device drives the metal sleeve to rotate along the ceramic sleeve to avoid the accumulation of raw materials in the metal sleeve, thereby improving the heating and drying efficiency of the raw materials. The inner wall of the metal sleeve has evenly distributed protrusions, which increases the heat dissipation area while reducing the contact area between the raw material and the tube wall, thereby increasing the contact area between the airflow and the raw material. After the drying of the raw materials is completed, the ceramic shell is supported to an inclined state again, so that the raw materials are concentrated and accumulated. After the cover is removed, the raw materials can be unloaded easily, which is flexible and efficient to use.

[0009] To further optimize the technical solution, the driving member includes a hydraulic cylinder rotatably hinged to the bottom frame, and an output end of the hydraulic cylinder is rotatably hinged to the outer wall of the ceramic shell.

[0010] The hydraulic cylinder assembled with the bottom frame drives the ceramic shell to flip. The hydraulic cylinder is hinged with the ceramic shell and the bottom frame to adapt to the flipping angle of the ceramic shell. It is smooth to use. The hydraulic cylinder technology is mature and stable and reliable to use.

[0011] To further optimize the technical solution, the ceramic shell is assembled with the aid of an assembly part and a ceramic sleeve, a control box is fixedly installed on the front side of the ceramic shell, and a box door that opens outwards is provided on the rear side of the ceramic shell.

[0012] After the control box is connected to the induction heating coil, it is convenient to operate it. The box door on the rear side of the ceramic shell makes it convenient to check, inspect, disassemble and maintain the ceramic sleeve inside, and it is flexible to use.

[0013] To further optimize the technical solution, the assembly includes a clamp connected to both ends of the ceramic sleeve and a screw fixedly installed on the inner wall of the ceramic shell. The screws are plugged into the through holes on the clamps, and nuts are threadedly connected to the screws. The nuts are arranged at the front and rear ends of the clamp and abut against the outer wall of the clamp.

[0014] After the clamp is clamped at both ends of the ceramic sleeve, it is fixedly assembled in the ceramic shell by a screw, the nut on the screw abuts against the clamp, and the clamp is tightened and fixed, so that the ceramic sleeve is firmly and stably used in the ceramic shell.

[0015] To further optimize the technical solution, the clamp includes two semicircular rings butted against each other, through holes are provided on the semicircular rings, and the screw rods are plugged into the through holes.

[0016] The two semicircular rings are fitted with the ceramic sleeve and butt-jointed to form a complete clamp, and the screw passes through the through hole on the semicircular ring. After the semicircular ring is locked with the help of a nut, the ceramic sleeve is fixed in the ceramic shell. It is easy to disassemble and assemble, and is equipped with an openable door on the rear side of the ceramic shell, making inspection and maintenance simple and flexible.

[0017] To further optimize the technical solution, the sealing cover is sealingly plugged into the metal sleeve, and the outer wall of the sealing cover is fixedly connected with a docking flange, and the outer wall of the docking flange is fixedly installed with a magnetic attraction piece; both ends of the metal sleeve are fixedly connected with a connecting flange, and the outer wall of the connecting flange is fixedly installed with a magnet; the magnetic attraction piece abuts against the magnet and cooperates with the magnet by magnetic attraction.

[0018] The sealing cap is plugged into the metal sleeve. When both sides of the metal sleeve are sealed, the magnetic suction parts on the sealing cap docking flange cooperate with the magnets on the connecting flange of the metal sleeve, thereby enhancing the firmness of the connection between the sealing cap and the metal sleeve, making it more difficult for the sealing cap to fall off the metal sleeve, and improving the safety of drying. However, it is simple and easy to remove the sealing cap manually, thereby improving the flexibility of use.

[0019] To further optimize the technical solution, the power output device includes a casing fixedly mounted on the ceramic shell, the casing is equipped with a matching drive motor and a gear box, the output end of the gear box passes through the casing, and is connected to the metal sleeve by means of a transmission assembly.

[0020] The gearbox amplifies the output torque of the driving motor to drive the metal sleeve to rotate smoothly along the ceramic sleeve, and the casing improves the safety of the supporting driving motor and gearbox.

[0021] To further optimize the technical solution, the transmission assembly includes a matching transmission belt and pulley, and the pulley is respectively connected to the output end of the gear box and the metal sleeve.

[0022] The power output of the transmission belt is more direct, the transmission belt is easy to maintain and overhaul, and the use is stable and low-cost.

[0023] To further optimize the technical solution, bearings are sleeved on both ends of the inner tube wall of the ceramic sleeve, and the metal sleeve is sleeved with the bearings.

[0024] The bearing reduces the friction resistance of the metal sleeve rotating along the ceramic sleeve, thereby improving the smoothness of the metal sleeve rotation.

[0025] The beneficial effects of the utility model are:

[0026] 1. The hydraulic cylinder drives the ceramic shell to flip along the bottom frame, so that the metal casing is tilted. When the raw materials are put into the metal casing, the materials slide down along the metal casing and accumulate, so that the materials can be fully loaded. After the raw materials are dried by the metal casing, the tilted metal casing also makes the raw materials accumulate at the bottom, which is convenient for unloading and flexible to use.

[0027] 2. When drying the raw materials, the ceramic shell and the metal sleeve are in a horizontal state to reduce the concentrated accumulation of materials. After the induction heating coil is started, the metal sleeve is induction heated. The induction heating coil is wound along the length direction of the ceramic sleeve, and the heating of the metal sleeve is more uniform and rapid. After driving the metal sleeve to rotate, the raw materials are avoided from piling up, so that they can fully contact with the metal sleeve, thereby uniformly heating the raw materials and improving the drying effect and drying quality;

[0028] 3. The assembly of the cover and the metal sleeve is that after the cover and the metal sleeve are plugged in, the magnet on the connecting flange and the magnetic suction piece on the docking flange are magnetically matched to improve the firmness of the connection between the cover and the metal sleeve. The disassembly of the cover and the metal sleeve is to overcome the magnetic attraction of the magnetic suction piece and the magnet, and the cover can be removed, which is convenient to operate;

[0029] 4. The control box on the front side of the ceramic shell facilitates the control of the induction heating coil and the power output device, and the two semicircular rings in the ceramic shell are fitted with the ceramic sleeve, and after being butt-jointed and assembled, they are combined into a complete clamp, and the screw passes through the through holes on the semicircular rings, and after the two semicircular rings are locked with the help of nuts, the ceramic sleeve is fixed in the ceramic shell. It is easy to disassemble and assemble, and is equipped with an openable door on the rear side of the ceramic shell, making inspection and maintenance simple and flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the furfural raw material drying device of this embodiment;

[0031] Figure 2 This is a schematic diagram of the back structure of the drying device of this embodiment in the state of loading and unloading raw materials;

[0032] Figure 3It is a schematic cross-sectional structure diagram of the ceramic housing, the ceramic sleeve and the metal sleeve assembled in this embodiment;

[0033] Figure 4 It is a schematic cross-sectional structure diagram of the ceramic sleeve and the metal sleeve assembled in this embodiment;

[0034] Figure 5 It is a schematic diagram of the structure of the metal sleeve and the cover assembly of this embodiment;

[0035] Figure 6 Schematic diagram of the structure of the ceramic sleeve of this embodiment;

[0036] Figure 7 It is a schematic diagram of the structural stretching of the clamp of this embodiment.

[0037] In the figure, 1, bottom frame; 101, hydraulic cylinder; 2, ceramic housing; 201, control box; 202, box door; 203, screw; 204, nut; 3, ceramic sleeve; 301, induction heating coil; 302, clamp; 3021, semicircular ring; 3022, through hole; 303, bearing; 4, metal sleeve; 401, protrusion; 402, cover; 4021, vent; 4022, docking flange; 4023, magnetic attraction; 403, connecting flange; 4031, magnet; 5, housing; 501, drive motor; 502, gear box; 503, transmission belt; 504, pulley. DETAILED DESCRIPTION

[0038] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] Please see attached Figure 1 -Attached Figure 3 And attached Figure 7The invention discloses a uniformly heated furfural raw material drying device, comprising a bottom frame 1, a ceramic shell 2 is arranged on the top of the base, one side of the ceramic shell 2 is rotatably hinged with the bottom frame 1, and the ceramic shell 2 is flipped and installed with the bottom frame 1 by means of a driving member, the driving member comprises a hydraulic cylinder 101 rotatably hinged with the bottom frame 1, the output end of the hydraulic cylinder 101 is rotatably hinged with the outer wall of the ceramic shell 2, when the hydraulic cylinder 101 is running, the ceramic shell 2 is pushed to flip along the bottom frame 1, a ceramic sleeve 3 is coaxially arranged in the length direction of the ceramic shell 2, both ends of the ceramic sleeve 3 are in contact with the inner wall of the ceramic shell 2, the ceramic sleeve 3 is assembled with the ceramic shell 2 by means of an assembly part, the assembly part comprises a clamp 302 clamped with both ends of the ceramic sleeve 3 and a screw 203 fixedly installed with the inner wall of the ceramic shell 2, the screw 203 and the clamp 302 The through hole 3022 on the clamp is plugged in, and the screw rod 203 is threadedly connected with a nut 204, the nut 204 is respectively arranged at the front and rear ends of the clamp 302, and abuts against the clamp 302, the nut 204 limits and locks the clamp 302 on the screw rod 203, the clamp 302 is two semicircular rings 3021 butted against each other, and the through holes 3022 are respectively arranged on the semicircular rings 3021, after the screw 203 and the through holes 3022 are plugged in, they are tightened and fixed by the nut 204, and the assembly is simple. The rear side of the ceramic housing 2 is provided with an outwardly opening box door 202, and the box door 202 is opened to realize the docking assembly and disassembly of the clamp 302, thereby facilitating the assembly and disassembly of the ceramic sleeve 3 in the ceramic housing 2, and facilitating the maintenance of the ceramic sleeve 3, etc., and improving the flexibility of use;

[0040] Please see attached Figure 3 -Attached Figure 4 And attached Figure 6 The outer wall of the ceramic sleeve 3 is wound with an induction heating coil 301, and the induction heating coil 301 can be connected to the control box 201 set at the front side of the ceramic shell 2 to control the operation of the induction heating coil 301. The inner tube wall of the ceramic sleeve 3 is sleeved with bearings 303 at both ends, and the inner tube wall of the ceramic sleeve 3 is sleeved with a metal sleeve 4. The metal sleeve 4 is sleeved with the bearing 303, so that the metal sleeve 4 can rotate along the ceramic sleeve 3. When the induction heating coil 301 is working, the metal sleeve 4 is inductively heated, and the heat is transmitted along the metal sleeve 4. The metal sleeve 4 is conducted to make it evenly heated, and the ceramic sleeve 3 does not interfere with the alternating magnetic field generated by the induction heating coil 301, so that the magnetic field passes through the ceramic sleeve 3 and heats the metal sleeve 4 smoothly. The inner tube wall of the metal sleeve 4 is evenly provided with protrusions 401, which increase the heat dissipation area of ​​the metal sleeve 4 and reduce the contact area between the raw material and the metal sleeve 4, thereby improving the heating and drying efficiency of the metal sleeve 4 for the raw material, and both ends of the metal sleeve 4 pass through the ceramic shell 2, which is convenient for adding raw materials into the metal sleeve 4;

[0041] Please see attached Figure 5, both ends of the metal sleeve 4 are detachably installed with a cover 402, and the outer wall of the cover 402 is provided with a vent 4021, and the vent 4021 allows the air in the metal sleeve 4 to have fluidity, so as to discharge the moisture generated by the drying of the raw materials, and the cover 402 is sealed and plugged with the metal sleeve 4, and the outer wall of the cover 402 is fixedly connected with a docking flange 4022, and the outer wall of the docking flange 4022 is fixedly installed with a magnetic suction piece 4023, and both ends of the metal sleeve 4 are fixedly connected with a connecting flange 403, and the outer wall of the connecting flange 403 is fixedly installed with a magnetic suction, and after the magnet 4031 abuts against the magnetic suction piece 4023, the magnet 4031 and the magnetic suction piece 4023 are magnetically matched, so as to constrain the position of the cover 402, prevent the cover 402 from falling off, and improve the reliability of use;

[0042] Please see attached Figure 1 , Attachment Figure 3 The outer wall of the ceramic shell 2 is equipped with a power output device, which can also be connected to the control box 201 set on the front side of the ceramic shell 2 to control it. The power output device is connected to the metal sleeve 4 to actively drive the metal sleeve 4 to rotate along the ceramic sleeve 3, so that the raw material rotates in the metal sleeve 4 to evenly heat the raw material. The power output device includes a casing 5 fixedly installed with the ceramic shell 2, and the casing 5 is equipped with a matching drive motor 501 and a gear box 502. The gear box 502 amplifies the output torque of the drive motor 501 so that the driving metal sleeve 4 can rotate smoothly and safely. The output end of the gear box 502 passes through the casing 5 and is connected to the metal sleeve 4 by means of a transmission component. The transmission component can use a matching transmission belt 503 and a pulley 504. The pulley 504 is respectively connected to the output end of the gear box 502 and the metal sleeve 4, and the transmission belt is wound on the pulley 504, so as to drive the metal sleeve 4 to rotate in a friction transmission manner. It is stable and reliable to use and has low cost.

[0043] The working principle of the evenly heated furfural raw material drying device is as follows: when the raw material is added to the metal sleeve 4 to dry it, the hydraulic cylinder 101 is operated to push the ceramic shell 2 to flip along the bottom frame 1, so that the ceramic shell 2 and the metal sleeve 4 are tilted, and the ceramic shell 2 is supported by the hydraulic cylinder 101 to maintain its shape, and then the raw material is transported into the metal sleeve 4 by means of equipment such as a belt conveyor, and the metal sleeve 4 is close to the side of the rotation hinge position of the ceramic shell 2 and the bottom frame 1. The cover 402 blocks the metal sleeve 4 to prevent the raw material from leaking when the metal sleeve 4 is loaded with the raw material, and the cover 402 on the other side of the metal sleeve 4 is removed to facilitate the loading of the raw material, and the tilting of the metal sleeve 4 causes the raw material to slide into the bottom along the metal sleeve 4 and gradually accumulate, thereby improving the convenience of raw material addition;

[0044] After a proper amount of raw materials are loaded into the metal sleeve 4, the sealing cap 402 seals both ends of the metal sleeve 4, and after the hydraulic cylinder 101 pulls the ceramic shell 2 and the metal sleeve 4 to a horizontal state, the induction heating coil 301 and the drive motor 501 are started, and the induction heating coil 301 induction heats the metal sleeve 4. The induction heating coil 301 is arranged along the length direction of the ceramic sleeve 3, and the metal sleeve 4 is heated evenly and quickly. When the drive motor 501 is running, the gear box 502 amplifies the output torque of the drive motor 501 and transmits the drive motor 501 to the gear box 502. The belt 503 drives the metal sleeve 4 to rotate along the ceramic sleeve 3 in a friction transmission mode. When the metal sleeve 4 rotates, it drives the material loaded therein to rotate, thereby avoiding the accumulation of raw materials and uniformly heating the raw materials. The evenly distributed protrusions 401 on the inner wall of the metal sleeve 4 increase the heat dissipation area, improve the drying efficiency, and reduce the contact area between the raw materials and the tube wall, which is convenient for air flow, increases the contact area between the air flow and the raw materials, and improves the heating and drying efficiency. The vents 4021 on the cover 402 facilitate the discharge of dried water vapor to the outside, thereby improving the safety of use.

[0045] After the raw materials are dried, the hydraulic cylinder 101 pushes the ceramic shell 2 to flip over again, so that the metal sleeve 4 is tilted, so that the raw materials are re-deposited on the tilted bottom of the metal sleeve 4. After placing a transfer vehicle or other tools under the metal sleeve 4, the cover 402 on this side is removed, so that the dried raw materials slide along the metal sleeve 4 into the transport vehicle, and the raw materials are easily unloaded. The cover 402 and the metal sleeve 4 are magnetically connected with the magnet 4031 and the magnetic attraction part 4023, so that the assembly and disassembly of the cover 402 and the metal sleeve 4 are simple, thereby improving the flexibility of use.

Claims

1. A uniformly heated furfural raw material drying device, characterized in that: The invention comprises a bottom frame (1), wherein a ceramic shell (2) is arranged on the top of the bottom frame (1), one side of the ceramic shell (2) is rotatably hinged with the bottom frame (1), and the ceramic shell (2) is flipped and installed with the bottom frame (1) by means of a driving member; a ceramic sleeve (3) is coaxially arranged inside the ceramic shell (2) along the length direction, both ends of the ceramic sleeve (3) are in contact with the inner wall of the ceramic shell (2), and an induction heating coil (301) is wound around the outer wall of the ceramic sleeve (3); a metal sleeve (4) is rotatably sleeved on the inner tube wall of the ceramic sleeve (3), both ends of the metal sleeve (4) penetrate the ceramic shell (2), the inner tube wall of the metal sleeve (4) is evenly provided with protrusions (401), both ends of the metal sleeve (4) are detachably provided with covers (402), and the outer wall of the covers (402) is provided with vents (4021); a power output device is arranged on the outer wall of the ceramic shell (2), and the power output device is drivingly connected to the metal sleeve (4).

2. The uniformly heated furfural raw material drying device according to claim 1, characterized in that: The driving member comprises a hydraulic cylinder (101) rotatably hinged to the bottom frame (1), and an output end of the hydraulic cylinder (101) is rotatably hinged to the outer wall of the ceramic shell (2).

3. The uniformly heated furfural raw material drying device according to claim 1, characterized in that: The ceramic shell (2) is assembled with the ceramic sleeve (3) by means of an assembly part, and a control box (201) is fixedly installed on the front side of the ceramic shell (2), and a box door (202) that opens outwards is arranged on the rear side of the ceramic shell (2).

4. The uniformly heated furfural raw material drying device according to claim 3, characterized in that: The assembly comprises a clamp (302) clamped with both ends of the ceramic sleeve (3) and a screw (203) fixedly mounted on the inner wall of the ceramic shell (2); the screw (203) is plugged into a through hole (3022) on the clamp (302), and a nut (204) is threadedly connected to the screw (203); the nut (204) is arranged at the front and rear ends of the clamp (302) and abuts against the outer wall of the clamp (302).

5. The uniformly heated furfural raw material drying device according to claim 4, characterized in that: The clamp (302) comprises two semicircular rings (3021) butted against each other, through holes (3022) are arranged on the semicircular rings (3021), and the screw rod (203) is plugged into the through holes (3022).

6. The uniformly heated furfural raw material drying device according to claim 1, characterized in that: The sealing cover (402) is sealed and plugged with the metal sleeve (4), and the outer wall of the sealing cover (402) is fixedly connected with a docking flange (4022), and the outer wall of the docking flange (4022) is fixedly installed with a magnetic attraction piece (4023); both ends of the metal sleeve (4) are fixedly connected with a connecting flange (403), and the outer wall of the connecting flange (403) is fixedly installed with a magnet (4031); the magnetic attraction piece (4023) is in contact with the magnet (4031) and is magnetically matched with the magnet (4031).

7. The uniformly heated furfural raw material drying device according to claim 1, characterized in that: The power output device comprises a casing (5) fixedly mounted on the ceramic housing (2), wherein a matching driving motor (501) and a gear box (502) are mounted in the casing (5), and an output end of the gear box (502) passes through the casing (5) and is transmission-connected to the metal sleeve (4) by means of a transmission assembly.

8. The uniformly heated furfural raw material drying device according to claim 7, characterized in that: The transmission assembly comprises a transmission belt (503) and a pulley (504) which are arranged in a matching manner, and the pulley (504) is respectively sleeved with the output end of the gear box (502) and the metal sleeve (4).

9. The uniformly heated furfural raw material drying device according to claim 1, characterized in that: Bearings (303) are sleeved on both ends of the inner tube wall of the ceramic sleeve (3), and the metal sleeve (4) is sleeved on the bearings (303).

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