Drying device for raw materials easy to oxidize

Abstract

The invention provides a drying device for easily oxidized raw materials, which belongs to the technical field of chemical raw material drying equipment and comprises a double-cone tank, a vacuumizing system and a hot fluid circulating system. Wherein a dispersion cover is arranged on the outer wall of the middle of the double-cone tank, concentration covers are arranged on the outer walls of the two ends of the double-cone tank, and the dispersion cover and the concentration covers are communicated through a plurality of drying pipes circumferentially distributed in the double-cone tank; a dispersing cover, a concentrating cover and a plurality of drying pipes penetrating through the interior of a double-cone tank are arranged, and hot fluid is dispersed by the dispersing cover to surround the double-cone tank by a circle, so that the hot fluid can be uniformly conveyed along the drying pipes distributed in the circumferential direction and finally conveyed into the concentrating cover; and the multiple drying pipes are distributed in the circumferential direction, so that the hot fluid can be introduced into the double-cone tank, heat exchange is evenly conducted on the materials from the interior, and then the drying efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical raw material drying equipment, and specifically refers to a drying device for easily oxidizable raw materials. Background Art

[0002] When drying easily oxidizable powder and granular raw materials, a double-cone rotary drying device is often used, and the double-cone rotary tank is used. Under vacuum in the tank, steam or hot water is introduced into the jacket for heating. The heat contacts the wet material through the inner wall of the tank. The water vapor evaporated after the wet material absorbs heat and is pumped away through the vacuum exhaust pipe by the vacuum pump. Since the tank is in a vacuum state and the rotation of the tank causes the material to be constantly turned up and down and inside and outside, the drying speed of the material is accelerated, the drying efficiency is improved, and the purpose of uniform drying is achieved. In addition, drying the material under vacuum conditions can effectively prevent the oxidation of the material and reduce safety risks.

[0003] At present, in order to make the steam circulate on the inner wall of the tank, the tank adopts a double-layer setting. The high-temperature steam passes into the inner layer and exchanges heat with the wet material through the inner wall of the tank. The steam after the heat exchange is refluxed through the outer layer. Since the temperature of the steam after the heat exchange is relatively low, when it refluxes through the outer layer, the high-temperature steam in the inner layer and the low-temperature steam in the outer layer exchange heat with the tank wall as the medium, which causes the temperature of the inner layer steam to decrease, thereby increasing the energy consumption of the equipment. In addition, the steam can only exchange heat with the material through the outer wall, and cannot heat the material through the inside, resulting in low heating and drying efficiency. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a drying device for easily oxidizable raw materials, which at least partially solves the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a drying device for easily oxidizable raw materials, comprising: A double-cone tank, comprising a turning axis, wherein the double-cone tank is configured to be able to turn over around the turning axis; The two ends of the double-cone tank flip axis are respectively provided with a vacuum system and a thermal fluid circulation system, and the thermal fluid circulation system is provided with an input end and a return end; The middle outer wall of the double-cone tank is provided with a dispersion cover, and the outer walls at both ends of the double-cone tank are provided with a concentration cover, the dispersion cover and the concentration cover are connected through a plurality of drying pipes circumferentially distributed in the double-cone tank, and the input end of the thermal fluid circulation system is connected to the dispersion cover, so that the thermal fluid is dispersed into each of the drying pipes by the dispersion cover and introduced into the interior of the double-cone tank by the drying pipes; The centralizing hood and the return end of the thermal fluid circulation system are connected through a return pipe, and the return pipe is arranged on the outside of the double-cone tank; The return end of the thermal fluid circulation system is configured to be able to rotate synchronously with the double-cone tank.

[0006] Furthermore, the double-conical tank is configured as a rotating shell with conical ends, and a feed port for feeding and a discharge port for discharging are respectively provided at the two ends of the double-conical tank, and a sealing cover for sealing is provided at both the feed port and the discharge port.

[0007] Furthermore, the diameter of the drying tube gradually increases along the direction from the narrowing end to the enlarged end of the double-conical tank.

[0008] Furthermore, the outer wall of the drying tube is provided with heat-conducting fins for increasing the heat exchange area.

[0009] Furthermore, the flip axis includes axis tubes located on both sides of the double-cone tank, and the axis tubes are fixed on the dispersion cover.

[0010] Furthermore, the vacuum system includes an exhaust pipe, a first end of which extends from the shaft tube at one end to the inside of the double-cone tank, and a second end of which is connected to the vacuum equipment.

[0011] Furthermore, a filter is provided at the first end of the air extraction pipe.

[0012] Further, the input end of the thermal fluid circulation system includes a heat supply pipe and an adapter, and the return end of the thermal fluid circulation system includes a second sleeve, a rotary joint and a cold flow pipe; One end of the heating pipe extends from the inside of the shaft pipe on one side to the dispersion cover, and the other end of the heating pipe is connected to the heating equipment through the adapter; The second sleeve is sleeved on the outside of the heating pipe and connected to the shaft tube. A reflux chamber for fluid reflux is formed between the second sleeve and the heating pipe. The reflux pipe is connected to the reflux chamber. The rotary joint is sleeved on the outside of the heating pipe and rotatably connected to the second sleeve through a slip-on flange. A cold flow pipe with one end connected to the reflux chamber is connected to the rotary joint, and the other end of the cold flow pipe is connected to a reflux device.

[0013] Furthermore, support platforms are provided on both sides of the double-cone tank flipping axis, bearing seats are provided on the support platforms, the second sleeve is connected to the bearing seats at corresponding positions, the outer side of the exhaust pipe is provided with a first sleeve coaxially fixed with the shaft tube, and the first sleeve is connected to the bearing seats at corresponding positions.

[0014] Furthermore, a pulley is coaxially fixed on the first sleeve, and a driving module is provided in the support platform located on one side of the first sleeve. The output end of the driving module is connected to the pulley through a belt to drive the double-cone tank to flip.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: 1. By setting a dispersion hood and a concentration hood, and setting a plurality of drying tubes passing through the inside of the double-cone tank, the dispersion hood disperses the hot fluid around the double-cone tank, so that the hot fluid can be evenly transported along a plurality of circumferentially distributed drying tubes, and finally transported to the concentration hood. Since the path of the drying tube passes through the inside of the double-cone tank, and there are a plurality of circumferentially distributed drying tubes, the hot fluid can be introduced into the inside of the double-cone tank, and the material is evenly heat-exchanged from the inside. During the heat exchange process, the drying tube is completely wrapped by the inner cavity of the double-cone tank, and the heat conduction efficiency is high, thereby improving the drying efficiency; 2. By setting a reflux pipe, the reflux ends of the concentrating hood and the heat fluid circulation system are connected through the reflux pipe, and the reflux pipe is set on the outside of the double-cone tank. The fluid transported by the drying pipe and completing the heat exchange flows to the concentrating hood for concentration, and then refluxes through the reflux pipe. Since the reflux pipe is located on the outside of the double-cone tank, heat exchange will not occur with the input heat fluid during the reflux process, thereby avoiding heat loss of the input heat fluid caused by the fluid reflux. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a drying device for easily oxidizable raw materials proposed in an embodiment of the present invention; Figure 2 A schematic diagram of the internal structure of a double-conical tank in a drying device for easily oxidizable raw materials proposed in an embodiment of the present invention; Figure 3 A cross-sectional schematic diagram of a hot fluid circulation system in a drying device for easily oxidizable raw materials proposed in an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a drying tube in a drying device for easily oxidizable raw materials proposed in an embodiment of the present invention; Figure 5 A schematic radial cross-sectional view of a drying tube in a drying device for easily oxidizable raw materials proposed in an embodiment of the present invention.

[0017] Among them, 1. double cone tank; 101. feed port; 102. discharge port; 11. sealing cover; 12. shaft tube; 2. vacuum system; 21. exhaust pipe; 22. filter; 23. first sleeve; 3. hot fluid circulation system; 301. reflux chamber; 31. heating pipe; 32. second sleeve; 321. slip-on flange; 33. rotary joint; 34. cold flow pipe; 35. adapter; 4. dispersion hood; 5. concentration hood; 6. drying tube; 61. heat transfer fins; 7. reflux pipe; 8. support platform; 81. bearing seat; 82. pulley.

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0021] like Figure 1-Figure 5 As shown, the present invention proposes a drying device for easily oxidizable raw materials, including a double-conical tank 1, a vacuum system 2 and a hot fluid circulation system 3.

[0022] The double-conical tank 1 is configured as a rotating shell with conical ends. A feed port 101 and a discharge port 102 are respectively provided at the two ends of the double-conical tank 1. The double-conical tank 1 is configured to be able to flip along its radial direction. The material is put into the double-conical tank 1 through the feed port 101, and after flipping and drying, it is discharged through the discharge port 102. Sealing covers 11 are provided at the feed port 101 and the discharge port 102 to seal the feed port 101 and the discharge port 102 respectively to prevent air leakage in the double-conical tank 1.

[0023] The vacuum system 2 is arranged at one end of the flip axis of the double-conical tank 1, and is used to extract the gas in the double-conical tank 1, so that a negative pressure state is formed and maintained inside the double-conical tank 1, so that the moisture inside the material diffuses to the surface through the pressure difference or concentration difference. The water molecules obtain sufficient kinetic energy on the surface of the material, and after overcoming the mutual attraction between the molecules, they diffuse into the low-pressure space of the vacuum chamber, and are sucked away by the vacuum system 2 to complete the separation from the solid.

[0024] The hot fluid circulation system 3 is arranged at the other end of the flip axis of the double-conical tank 1, and is used to provide circulating hot fluid into the double-conical tank 1, and transfer heat to the material by heat conduction. Due to the structural characteristics of the double cone, the material is constantly tumbling and dispersing in the main machine, thereby achieving rapid and uniform drying of the material. The hot fluid circulation system 3 is provided with an input end and a reflux end.

[0025] Combination Figure 1 and Figure 2 As shown, a dispersion hood 4 is provided on the middle outer wall of the double-conical tank 1, and a concentration hood 5 is provided on the outer walls at both ends of the double-conical tank 1. The dispersion hood 4 and the concentration hood 5 are connected through a plurality of drying pipes 6 circumferentially distributed in the double-conical tank 1. The input end of the hot fluid circulation system 3 is connected to the dispersion hood 4, so that the hot fluid is dispersed into each drying pipe 6 by the dispersion hood 4 and introduced into the interior of the double-conical tank 1 by the drying pipe 6, and the material is dried from the inside.

[0026] In this way, the heating equipment first transports the hot fluid to the dispersion hood 4 through the hot fluid circulation system 3, and the dispersion hood 4 disperses the hot fluid around the double-conical tank 1, so that the hot fluid can be evenly transported along multiple circumferentially distributed drying pipes 6, and finally transported to the concentration hood 5. Since the path of the drying pipe 6 passes through the inside of the double-conical tank 1, the hot fluid can be introduced into the inside of the double-conical tank 1. Since there are multiple drying pipes 6 distributed circumferentially, the material can be evenly heat exchanged from the inside. In the process of heat exchange, the drying pipe 6 is completely wrapped by the inner cavity of the double-conical tank 1, and the heat conduction efficiency is high, thereby improving the drying efficiency.

[0027] Furthermore, the concentrating hood 5 and the reflux end of the heat fluid circulation system 3 are connected through the reflux pipe 7, and the reflux pipe 7 is arranged on the outside of the double-conical tank 1. The fluid that is transported by the drying pipe 6 and completes the heat exchange flows into the concentrating hood 5 for concentration, and then refluxes through the reflux pipe 7. Since the reflux pipe 7 is located on the outside of the double-conical tank 1, during the reflux process, no heat exchange will occur with the input heat fluid, thereby avoiding heat loss of the input heat fluid caused by the fluid reflux.

[0028] Combination Figure 4 As shown, since the space from the narrowing end to the enlarged end of the double-conical tank 1 gradually increases, when the double-conical tank 1 is drying, more materials are accumulated at the enlarged end, and the drying speed is slow. However, the space at the narrowing end of the double-conical tank 1 is small, and the heat exchange area cannot be increased by increasing the number of drying tubes 6.

[0029] Therefore, the diameter of the drying tube 6 gradually increases from the narrow end to the enlarged end of the double-conical tank 1, and the surface area of ​​the drying tube 6 with gradually increasing diameter also increases accordingly, increasing the area in contact with the material for heat exchange and improving the drying efficiency; The heat exchange area at the enlarged end of the double-conical tank 1 can be adjusted by changing the diameter of the drying tube 6 , without increasing the number of drying tubes 6 .

[0030] Combination Figure 5 As shown, the outer wall of the drying tube 6 is provided with heat-conducting fins 61, and the heat-conducting fins 61 can increase the heat exchange area between the hot fluid and the material, thereby further improving the drying efficiency.

[0031] Combination Figure 1 and Figure 2As shown, the flip axis includes an axis tube 12 located on both sides of the double-cone tank 1, and the axis tube 12 is fixed on the dispersion cover 4.

[0032] In a specific embodiment, the vacuum system 2 includes an exhaust pipe 21, a first end of the exhaust pipe 21 extends through the shaft tube 12 located at one end to the inside of the double-cone tank 1, and a second end of the exhaust pipe 21 is connected to a vacuum device. The vacuum device extracts air from the inside of the double-cone tank 1 through the exhaust pipe 21, so that a negative pressure state is formed and maintained inside the double-cone tank 1.

[0033] Furthermore, a filter 22 is provided at the first end of the exhaust pipe 21. When the first end of the exhaust pipe 21 extracts air from the inside of the double-conical tank 1, the filter 22 filters the material to prevent the material from being extracted.

[0034] Furthermore, the connection between the exhaust pipe 21 and the double-conical tank 1 and the connection between the exhaust pipe 21 and the shaft tube 12 are connected by mechanical seals to maintain the sealing between the double-conical tank 1 and the shaft tube 12 and the exhaust pipe 21 during rotation.

[0035] In a specific embodiment, the input end of the hot fluid circulation system 3 includes a heat supply pipe 31 and an adapter 35, and the return end of the hot fluid circulation system 3 includes a second sleeve 32, a rotary joint 33 and a cold flow pipe 34. One end of the heat supply pipe 31 extends from the inside of the shaft tube 12 on one side to the dispersion cover 4, and the other end of the heat supply pipe 31 is connected to the heating device through the adapter 35. The heating device transports hot fluid to the dispersion cover 4 through the heat supply pipe 31; The second sleeve 32 is sleeved on the outside of the heating pipe 31 and connected to the shaft tube 12. A reflux chamber 301 for fluid reflux is formed between the second sleeve 32 and the heating pipe 31. The reflux pipe 7 is connected to the reflux chamber 301. The rotary joint 33 is sleeved on the outside of the heating pipe 31 and is rotatably connected to the second sleeve 32 through a slip-on flange 321. A cold flow pipe 34 with one end connected to the reflux chamber 301 is connected to the rotary joint 33. The other end of the cold flow pipe 34 is connected to the reflux device. The fluid refluxed through the reflux pipe 7 flows back to the reflux device along the reflux chamber 301, the rotary joint 33 and the cold flow pipe 34 in sequence.

[0036] Since the second sleeve 32 is rotatably connected to the rotary joint 33 through the slip-on flange 321, the second sleeve 32 can rotate synchronously with the shaft tube 12, the dispersion cover 4 and the double-cone tank 1, and rotate relative to the rotary joint 33, while transporting the reflux fluid through the reflux chamber 301.

[0037] Furthermore, a mechanical seal is provided at the connection between the heat supply pipe 31 and the dispersion cover 4 to maintain the sealing between the dispersion cover 4 and the heat supply pipe 31 when the dispersion cover 4 rotates.

[0038] Combination Figure 1 and Figure 2As shown, support platforms 8 are provided on both sides of the flipping axis of the double-conical tank 1, and bearing seats 81 are provided on the support platforms 8. The second sleeve 32 is connected to the bearing seats 81 at the corresponding position, and the outer side of the exhaust pipe 21 is provided with a first sleeve 23 coaxially fixed with the shaft tube 12. The first sleeve 23 is connected to the bearing seats 81 at the corresponding position. The double-conical tank 1 is supported by two support platforms 8 and the bearing seats 81, so that the double-conical tank 1 can be flipped on the two support platforms 8.

[0039] Furthermore, a heating device and a reflux device are provided inside the support platform 8 near the hot fluid circulation system 3, and the cold flow pipe 34 and the adapter 35 both extend into the support platform 8 and are respectively connected to the reflux device and the heating device.

[0040] In an optional embodiment, the thermal fluid used in the present technical solution is high-temperature steam, and accordingly, the heating equipment is a steam generator, and the reflux equipment is a steam condenser.

[0041] Furthermore, a driving module is provided in the support platform 8 located on one side of the first sleeve 23, a pulley 82 is coaxially fixed on the first sleeve 23, and the output end of the driving module is connected to the pulley 82 through a belt, which can drive the double-cone tank 1 to flip.

[0042] In an optional embodiment, the driving module includes a motor and a reducer, the reducer is connected to the output end of the motor, the output end of the reducer is provided with a driving pulley corresponding to the pulley 82, and the two pulleys are connected by a transmission belt; Since the first sleeve 23 is coaxially fixed with the shaft tube 12 at one end, the shaft tube 12 is fixed on the dispersion cover 4, and the dispersion cover 4 is fixed on the double-conical tank 1, the motor can drive the double-conical tank 1 to flip.

[0043] In summary of the above embodiments: by providing a dispersion hood 4 and a concentration hood 5, and providing a plurality of drying tubes 6 passing through the inside of the double-cone tank 1, during drying, the dispersion hood 4 disperses the hot fluid around the double-cone tank 1, so that the hot fluid can be evenly transported along the plurality of circumferentially distributed drying tubes 6, and finally transported to the concentration hood 5. Since the path of the drying tube 6 passes through the inside of the double-cone tank 1, and there are a plurality of circumferentially distributed drying tubes 6, the hot fluid can be introduced into the inside of the double-cone tank 1, and the material is evenly heat-exchanged from the inside. During the heat exchange process, the drying tube 6 is completely wrapped by the inner cavity of the double-cone tank 1, and the heat conduction efficiency is high, thereby improving the drying efficiency; By setting the return pipe 7, the return end of the concentrating cover 5 and the heat fluid circulation system 3 are connected through the return pipe 7, and the return pipe 7 is arranged on the outside of the double cone tank 1. The fluid transported by the drying pipe 6 and completing the heat exchange flows to the concentrating cover 5 for concentration, and then refluxes through the return pipe 7. Since the return pipe 7 is located on the outside of the double cone tank 1, during the reflux process, heat exchange will not occur with the input heat fluid, thereby avoiding heat loss caused by the fluid reflux to the input heat fluid; Since the transported hot fluid and the return fluid can flow without passing through the interlayer, the double-cone tank 1 can be a single-layer structure and does not need to be processed into a complex double-layer structure, thereby reducing production costs and maintenance costs.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A drying device for easily oxidizable raw materials, characterized in that: include: A double-cone tank (1) comprises a turning axis, wherein the double-cone tank (1) is configured to be able to turn around the turning axis; The two ends of the turning axis of the double-cone tank (1) are respectively provided with a vacuum system (2) and a thermal fluid circulation system (3), and the thermal fluid circulation system (3) is provided with an input end and a return end; The middle outer wall of the double-cone tank (1) is provided with a dispersion hood (4), and the outer walls at both ends of the double-cone tank (1) are provided with a concentration hood (5); the dispersion hood (4) and the concentration hood (5) are connected via a plurality of drying pipes (6) circumferentially distributed in the double-cone tank (1); the input end of the thermal fluid circulation system (3) is connected to the dispersion hood (4), so that the thermal fluid is dispersed into each of the drying pipes (6) by the dispersion hood (4), and introduced into the interior of the double-cone tank (1) by the drying pipes (6); The concentrating hood (5) and the return end of the thermal fluid circulation system (3) are connected via a return pipe (7), and the return pipe (7) is arranged outside the double-cone tank (1); The return end of the thermal fluid circulation system (3) is arranged to be able to rotate synchronously with the double-cone tank (1).

2. The drying device for easily oxidizable raw materials according to claim 1, characterized in that: The double-cone tank (1) is configured as a rotating shell with conical ends. A feed port (101) for feeding materials and a discharge port (102) for discharging materials are respectively provided at the two ends of the double-cone tank (1). A sealing cover (11) for sealing is provided at both the feed port (101) and the discharge port (102).

3. The drying device for easily oxidizable raw materials according to claim 2, characterized in that: Along the direction from the narrowing end to the enlarged end of the double-cone tank (1), the diameter of the drying tube (6) gradually increases.

4. The drying device for easily oxidizable raw materials according to claim 1, characterized in that: The outer wall of the drying tube (6) is provided with heat-conducting fins (61) for increasing the heat exchange area.

5. The drying device for easily oxidizable raw materials according to claim 1, characterized in that: The turning axis comprises axis tubes (12) located on both sides of the double-cone tank (1), and the axis tubes (12) are fixed on the dispersion cover (4).

6. The drying device for easily oxidizable raw materials according to claim 5, characterized in that: The vacuum pumping system (2) comprises an air pumping pipe (21), a first end of the air pumping pipe (21) extending from the shaft tube (12) at one end to the interior of the double-cone tank (1), and a second end of the air pumping pipe (21) connected to a vacuum pumping device.

7. The drying device for easily oxidizable raw materials according to claim 6, characterized in that: A filter (22) is provided at the first end of the air extraction pipe (21).

8. The drying device for easily oxidizable raw materials according to claim 6, characterized in that: The input end of the thermal fluid circulation system (3) comprises a heat supply pipe (31) and an adapter (35), and the return end of the thermal fluid circulation system (3) comprises a second sleeve (32), a rotary joint (33) and a cold flow pipe (34); One end of the heating pipe (31) extends from the interior of the shaft pipe (12) on the corresponding side to the inside of the dispersion cover (4), and the other end of the heating pipe (31) is connected to the heating equipment via the adapter (35); The second sleeve (32) is sleeved on the outside of the heating pipe (31) and connected to the shaft pipe (12); a reflux chamber (301) for fluid reflux is formed between the second sleeve (32) and the heating pipe (31); the reflux pipe (7) is connected to the reflux chamber (301); the rotary joint (33) is sleeved on the outside of the heating pipe (31) and rotatably connected to the second sleeve (32) via a slip-on flange (321); a cold flow pipe (34) having one end in communication with the reflux chamber (301) is connected to the rotary joint (33); the other end of the cold flow pipe (34) is connected to a reflux device.

9. The drying device for easily oxidizable raw materials according to claim 8, characterized in that: Support platforms (8) are provided on both sides of the turning axis of the double-cone tank (1), and bearing seats (81) are provided on the support platforms (8). The second sleeve (32) is connected to the bearing seats (81) at corresponding positions. The outer side of the exhaust pipe (21) is provided with a first sleeve (23) coaxially fixed with the shaft pipe (12), and the first sleeve (23) is connected to the bearing seats (81) at corresponding positions.

10. The drying device for easily oxidizable raw materials according to claim 9, characterized in that: A pulley (82) is coaxially fixed on the first sleeve (23), and a driving module is provided in the support platform (8) located on one side of the first sleeve (23), wherein an output end of the driving module is connected to the pulley (82) via a belt for driving the double-cone tank (1) to flip.

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