Anode material granulation tail gas treatment device and method of use thereof

Abstract

The present application relates to tail gas treatment device technical field, specifically to a kind of negative electrode material granulation with tail gas treatment device and its use method, including reaction kettle and buffer tank, the top outer wall of the reaction kettle is connected with filter tube by bolt, the top outer wall of the buffer tank is connected with buffer tube by bolt, the buffer tube is connected with filter tube, the outer wall of the filter tube is welded with motor, the main shaft of the motor is through filter tube and extends into buffer tube, the inner wall of the filter tube is welded with support, the outer wall of the support is welded with steel wire screen.The present application is strong in application, easy to popularize, applicable to high concentration, high humidity dust-containing gas and high adhesion dust treatment purification, and the effect is better, when encountering the dust with strong adhesion and strong hygroscopicity, it also will not be blocked, by capturing gasified tar, the processing pressure of subsequent process is reduced, and work efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of tail gas treatment devices, and in particular relates to a tail gas treatment device for granulating negative electrode materials and a method for using the same. Background Art

[0002] Lithium-ion batteries are widely used in portable electronic products and power tools due to their high specific energy, high operating voltage, fast charge and discharge speed, long cycle life, safety and pollution-free. Moreover, with the development of technology, they are gradually used in electric vehicles, military, aerospace and other fields, which puts higher requirements on battery charge and discharge speed, battery capacity, safety, etc.

[0003] In recent years, the research and production of new energy has become a hot area of ​​research at home and abroad, and graphite is undoubtedly one of the materials that is highly valued in the field of new energy. As the application areas of graphite are continuously developed, the requirements for graphite purity indicators are increasing.

[0004] Granulation is a key step in the production of battery anode materials. The granulation process involves loading a uniformly mixed material into a furnace for granulation, resulting in a semi-finished anode material. The anode material coating and granulation reactor process generates a large amount of high-temperature flue gas at around 650°C. The main components of this high-temperature flue gas are asphalt powder, tar, and dust.

[0005] In the existing technology, the high-temperature flue gas of some manufacturers is directly treated by a flue gas comprehensive treatment device (such as an incinerator, an electric tar collector, a dust collector, etc.). Since the tar and dust contained in the high-temperature flue gas are easily adhered and agglomerated after mixing, the filter components of the environmental protection equipment are often blocked, which poses a certain safety hazard. In addition, the existing technology uses physical sedimentation to recklessly recover the vaporized tar, which is a slow process and has low work efficiency. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems in the background technology and to propose an exhaust gas treatment device for negative electrode material granulation and a method of using the same.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A tail gas treatment device for granulating negative electrode materials, comprising a reactor and a buffer tank, wherein the outer wall of the top of the reactor is connected to a filter tube by bolts, the outer wall of the top of the buffer tank is connected to the buffer tube by bolts, the buffer tube is connected to the filter tube, a motor is welded on the outer wall of the filter tube, the main shaft of the motor passes through the filter tube and extends into the buffer tube, a bracket is welded on the inner wall of the filter tube, a steel wire filter is welded on the outer wall of the bracket, a plurality of filter holes are distributed on the steel wire filter, the filter holes can filter dust in the organic waste gas, and a pair of symmetrically distributed sliding blocks are slidably inserted in the filter holes. Rod, each of the sliding rods is welded with a nail plate on the outer wall of one end away from the motor, and each of the nail plates is welded with a number of dredging nails on the outer wall on the side close to the wire filter, and the dredging nails are adapted to the filter holes, and a spring is welded between the outer wall of each nail plate and the outer wall of the wire filter, and the spring is sleeved on the outer wall of the sliding rod, and each of the nail plates is welded with a wedge block 2 on the outer wall on the side away from the wire filter, the main shaft of the motor passes through the bracket and the nail plate, and a wedge block 1 is welded on the outer wall of the main shaft section of the motor close to the wedge block 2, and the wedge block 1 is adapted to the wedge block 2, and a tar filtering mechanism is provided in the filter tube.

[0009] In the above-mentioned tail gas treatment device for granulating negative electrode materials, a stop is welded on the outer wall of one end of the sliding rod close to the motor, and the diameter of the stop is larger than the diameter of the filter hole.

[0010] In the above-mentioned tail gas treatment device for granulating negative electrode materials, the tar filtering mechanism includes a cotton cylinder, a fixing frame is welded on the inner wall of the transition between the filter tube and the buffer tube, a mounting shaft is rotatably inserted at the center of the fixing frame, and the mounting shaft extends into the filter tube, and a mounting frame is welded on the end wall of the mounting shaft on one side of the filter tube, and a cotton cylinder is slidably sleeved on the outer wall of the mounting shaft, and the two ends of the cotton cylinder are respectively bonded to the outer walls of the mounting frame and the fixing frame, and ventilation holes are provided on the outer walls of the mounting frame and the fixing frame.

[0011] In the above-mentioned exhaust gas treatment device for granulating negative electrode materials, a pair of large gears are rotatably plugged into the outer wall of the fixing frame close to the buffer tube, and a small gear is welded on the outer wall of each large gear. The plane where the two small gears are located is distributed in a stepped manner. A central gear is welded on the outer wall of one end of the mounting shaft close to the buffer tube. The central gear and the large gear are engaged with each other, and the main shaft of the motor passes through the mounting shaft.

[0012] In the above-mentioned exhaust gas treatment device for granulation of negative electrode materials, a large ring gear and a small ring gear are welded on the outer wall of the main shaft section of the motor close to the small gear. The large ring gear and the small ring gear are both adapted to the small gear. The large ring gear and the small ring gear are distributed in a stepped manner, the large ring gear is an internal tooth, and the small ring gear is an external tooth.

[0013] In the above-mentioned exhaust gas treatment device for negative electrode material granulation, a forward fan is welded on the outer wall of the main shaft section of the motor close to the filter tube and the buffer tube. The forward fan can draw the gas in the reactor into the buffer tube. A reverse fan is welded on the end of the main shaft of the motor. The reverse fan can blow air into the filter tube.

[0014] In the above-mentioned exhaust gas treatment device for granulating negative electrode materials, a drain pipe is connected to the bottom of the filter tube, and the drain pipe is located between the mounting frame and the wedge-shaped block. The inner wall diameter of the filter tube close to the drain pipe gradually expands, and the inner wall diameter of the buffer tube away from the filter tube gradually expands. Heat conducting plates are welded on the outer walls of the filter tube and the buffer tube.

[0015] In the above-mentioned tail gas treatment device for negative electrode material granulation, a reflux pipe is connected to the outer wall of the buffer tube, and the reflux pipe extends to the top of the cotton cylinder. The reflux pipe is located in the windward direction of the reverse fan.

[0016] A method for treating tail gas used in granulation of negative electrode materials, which applies a tail gas treatment device for granulation of negative electrode materials as described above, comprises the following steps: first, dust-containing high-temperature organic waste gas enters the filter tube under the action of a forward fan, the organic waste gas first passes through a wire filter to filter out dust, and the dust here falls back to the reactor to continue to be used as raw material, the dust-free high-temperature waste gas enters the buffer tube, and the tar vaporized in the waste gas is captured by a cotton cylinder, and then the waste gas continues to enter the next process, secondly, the dust-free high-temperature organic waste gas enters the tail gas buffer tank, and is buffered to reduce the flow rate, and the waste gas is settled. The substances are first settled, which effectively avoids the problem of particles and asphalt in the exhaust gas being deposited in the pipeline. Then, after the exhaust gas enters the buffer tank for cooling, the organic exhaust gas is condensed into liquid asphalt tar and stored in the buffer tank below. The low vaporization point components continue to move forward. Then, the low vaporization point components of each reactor are merged into the main pipe through the branch pipe, and enter the buffer bin along the main pipe for further cooling. A small amount of components are further condensed. Finally, the remaining organic waste gas enters the electric tar precipitator, and is further collected and adsorbed under the action of the high-voltage electric field force. Finally, the clean exhaust gas that meets the standards is discharged through the chimney.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention comprises the following steps: step S1: dust-laden high-temperature organic waste gas first passes through a filter screen in a filter tube to filter out dust, where the dust falls back into the reactor to continue to be utilized as raw material, and the dust-free high-temperature waste gas continues to enter the next process, thereby improving the material yield of the granulation process. Furthermore, the motor drives the wedge block 1 to rotate, so that the wedge block 1 interlocks with the two wedge blocks 2, thereby causing the two wedge blocks 2 to drive the two nail plates to slide back and forth, thereby enabling the dredging nails to dredge the filter holes to prevent the wire filter screen from being clogged. At the same time, the dredging nails can push the clogged particles into the reactor, further improving the material utilization rate.

[0019] 2. The present invention comprises step S1: dust-free high-temperature exhaust gas enters the buffer tube, and the tar vaporized in the exhaust gas is captured by the cotton drum, thereby improving the efficiency of the tar recovery process. The motor drives the large and small ring gears to intermittently engage with the small gear, so that the large gear can drive the central gear to rotate forward and reverse, thereby causing the mounting frame to drive one end of the cotton drum to rotate forward and reverse, achieving the effect of wringing out the cotton drum, ensuring the cotton drum's tar absorption effect. The captured tar is stored at the bottom of the buffer tank through the drain pipe;

[0020] In summary, the present invention has strong applicability and is easy to promote. It is more effective in treating and purifying high-concentration, high-humidity dust-containing gases and highly adhesive dust. It will not be blocked when encountering dust with strong adhesion and hygroscopicity. By capturing gasified tar, the processing pressure of subsequent processes is reduced, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic three-dimensional diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic three-dimensional cross-sectional view of the overall structure of the present invention.

[0023] Figure 3 It is a schematic three-dimensional cross-sectional view of the nail plate of the present invention.

[0024] Figure 4 This is a schematic diagram of the working state of the wedge block 1 and the wedge block 2 of the present invention.

[0025] Figure 5 It is a three-dimensional schematic diagram of the cotton tube of the present invention.

[0026] Figure 6 It is a three-dimensional schematic diagram of the installation shaft of the present invention.

[0027] Figure 7 It is a plan view of the large gear and small gear of the present invention.

[0028] Figure 8 It is a three-dimensional schematic diagram of the motor assembly of the present invention.

[0029] Figure 9 Schematic diagram of the workflow of the present invention.

[0030] In the figure: 1. Reactor; 11. Filter tube; 12. Drain pipe; 13. Fixed bracket; 2. Buffer tank; 21. Buffer tube; 22. Reflux pipe; 23. Heat conducting plate; 3. Motor; 31. Forward fan; 32. Reverse fan; 33. Large ring gear; 34. Small ring gear; 35. Wedge block 1; 4. Bracket; 41. Wire filter; 42. Filter hole; 5. Nail plate; 51. Unclogging nail; 52. Slide rod; 53. Stop platform; 54. Spring; 55. Wedge block 2; 6. Mounting shaft; 61. Mounting bracket; 62. Cotton cylinder; 63. Center gear; 7. Large gear; 71. Small gear; 8. Buffer bin; 81. Electric tar precipitator; 82. Chimney. DETAILED DESCRIPTION

[0031] 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.

[0032] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., 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.

[0033] See also Figures 1-9The present invention provides an exhaust gas treatment device for granulating negative electrode materials, comprising a reactor 1 and a buffer tank 2. The outer wall of the top of the reactor 1 is connected to a filter tube 11 by bolts, and the outer wall of the top of the buffer tank 2 is connected to a buffer tube 21 by bolts. The buffer tube 21 is connected to the filter tube 11, and a motor 3 is welded on the outer wall of the filter tube 11. The main shaft of the motor 3 passes through the filter tube 11 and extends into the buffer tube 21. A bracket 4 is welded on the inner wall of the filter tube 11, and a steel wire filter 41 is welded on the outer wall of the bracket 4. A plurality of filter holes 42 are distributed on the steel wire filter 41. The filter holes 42 can filter dust in the organic waste gas. A pair of symmetrically distributed slide rods 52 are slidably inserted in the filter holes 42. Each slide rod 52 is on the outer wall of the end away from the motor 3. They are all welded with nail plates 5, and each nail plate 5 is welded with several dredging nails 51 on the outer wall of one side close to the wire filter 41, and the dredging nails 51 are adapted to the filter holes 42. A spring 54 is welded between the outer wall of each nail plate 5 and the outer wall of the wire filter 41, and the spring 54 is mounted on the outer wall of the slide rod 52. A wedge block 2 55 is welded on the outer wall of the side of each nail plate 5 away from the wire filter 41. The main shaft of the motor 3 passes through the bracket 4 and the nail plate 5. A wedge block 1 35 is welded on the outer wall of the main shaft section of the motor 3 close to the wedge block 2 55, and the wedge block 1 35 is adapted to the wedge block 2 55. A tar filtering mechanism is provided in the filter tube 11, and a baffle 53 is welded on the outer wall of one end of the slide rod 52 close to the motor 3. The diameter of the baffle 53 is larger than the diameter of the filter hole 42.

[0034] In the initial state, under the action of the spring 54 , the dredging nail 51 is away from the filter hole 42 , and the second wedge block 55 abuts against the first wedge block 35 .

[0035] The above content is further elaborated as follows: the starting motor 3 drives the forward fan 31 to rotate, so that the exhaust gas in the reactor 1 enters the filter tube 11, and the exhaust gas enters the filter screen to filter out the dust. At the same time, the motor 3 drives the wedge block 1 35 to rotate, so that the wedge block 1 35 pushes the wedge block 2 55 along the wedge-shaped inclined surface, so that the wedge block 2 55 drives the nail plate 5 to approach the wire filter screen 41, thereby enabling the dredging nail 51 to dredge the filter hole 42 to prevent the wire filter screen 41 from being blocked, and when the wedge block 1 35 abuts against one wedge block 2 55, the other wedge block 2 55 is reset under the action of the spring 54, so that the two nail plates 5 move back and forth in an alternating manner to prevent the filter holes 42 from being completely blocked, thereby ensuring smooth airflow, and when the wedge block 2 55 is reset under the action of the spring 54, it drives the stop table 53 to hit the wire filter screen 41, causing the wire filter screen 41 to vibrate, further removing the initial dust.

[0036] Specifically, the tar filtering mechanism includes a cotton cylinder 62, a fixing frame 13 is welded on the inner wall of the transition between the filter tube 11 and the buffer tube 21, a mounting shaft 6 is rotatably inserted at the center of the fixing frame 13, the mounting shaft 6 extends into the filter tube 11, and a mounting frame 61 is welded on the end wall of the mounting shaft 6 on one side of the filter tube 11. A cotton cylinder 62 is slidably sleeved on the outer wall of the mounting shaft 6, and the two ends of the cotton cylinder 62 are respectively bonded to the outer walls of the mounting frame 61 and the fixing frame 13. There are vents on the outer wall. A pair of large gears 7 are rotatably plugged into the outer wall of the fixing frame 13 near the buffer tube 21. A small gear 71 is welded on the outer wall of each large gear 7. The plane where the two small gears 71 are located is distributed in a stepped manner. A central gear 63 is welded on the outer wall of one end of the mounting shaft 6 near the buffer tube 21. The central gear 63 and the large gear 7 are meshed with each other. The main shaft of the motor 3 passes through the mounting shaft 6. A large ring gear 33 and a small gear are welded on the outer wall of the main shaft section of the motor 3 near the small gear 71. Ring 34, large ring gear 33 and small ring gear 34 are adapted to pinion 71, large ring gear 33 and small ring gear 34 are distributed in a stepped manner, large ring gear 33 is internal gear, small ring gear 34 is external gear, a forward fan 31 is welded on the outer wall of the main shaft section of motor 3 close to filter tube 11 and buffer tube 21, the forward fan 31 can draw the gas in reactor 1 into buffer tube 21, a reverse fan 32 is welded on the main shaft end of motor 3, the reverse fan 32 can blow air into filter tube 11, filter The bottom of the tube 11 is connected to a drain pipe 12, which is located between the mounting bracket 61 and the wedge-shaped block 35. The inner wall diameter of the filter tube 11 close to the drain pipe 12 gradually expands, and the inner wall diameter of the buffer tube 21 away from the filter tube 11 gradually expands. Heat conducting plates 23 are welded on the outer walls of the filter tube 11 and the buffer tube 21. A return pipe 22 is connected to the outer wall of the buffer tube 21. The return pipe 22 extends to the top of the cotton cylinder 62 and is located in the front direction of the wind of the reverse fan 32.

[0037] The large ring gear 33 and the small ring gear 34 are all distributed in a stepped manner with the two small gears 71, so that they can avoid each other. The large ring gear 33 has internal teeth and the small ring gear 34 has external teeth, thereby realizing the forward and reverse rotation of the small gear 71. The large ring gear 33 and the small ring gear 34 are both incomplete circles, thereby realizing alternating engagement. When the large ring gear 33 meshes with the small gear 71 in the same plane, the small ring gear 34 can avoid the small gear 71. Similarly, when the small ring gear 34 meshes with the small gear 71 in the same plane, the large ring gear 33 can avoid the small gear 71.

[0038] The above content is further elaborated: After the dust-free exhaust gas enters the buffer tube 21, under the action of the reverse fan 32, the gas forward resistance is increased, the gas residence time is prolonged, the buffering effect is improved, the gas forward kinetic energy is reduced, and a foundation is laid for subsequent sedimentation. At the same time, the exhaust gas can enter the filter tube 11 again through the return pipe 22, and the exhaust gas can be cooled, so that when the exhaust gas passes through the cotton cylinder 62, the cotton cylinder 62 can absorb the gasified tar, and the tar is liquefied and attached to the cotton cylinder 62. When the motor 3 with the large ring gear 33 and the small ring gear 34 intermittently engages with the small gear 71, the mounting bracket 61 drives one end of the cotton cylinder 62 to rotate forward and reverse, so as to achieve the effect of screwing out the liquefied tar. The liquefied tar enters the buffer tank 2 through the drain pipe 12, which improves the tar capture efficiency and reduces the pressure of subsequent processes.

[0039] A method for treating tail gas used in granulating anode materials, using a tail gas treatment device used in granulating anode materials, comprises the following steps:

[0040] S1. First, dust-laden, high-temperature organic waste gas enters the filter tube 11 under the action of the forward fan 31. The organic waste gas first passes through the wire filter 41 to filter out dust. The dust here falls back into the reactor 1 and continues to be used as raw material. The dust-free, high-temperature waste gas enters the buffer tube 21. The cotton cylinder 62 captures the vaporized tar in the waste gas. The waste gas then continues to enter the next process.

[0041] S2. Secondly, the dust-free high-temperature organic waste gas enters the tail gas buffer tank 2 for buffering and reducing the flow rate. The sediment in the waste gas is first settled, effectively avoiding the problem of particles and asphalt in the waste gas being deposited in the pipeline;

[0042] S3. Once again, the waste gas enters the buffer tank 2 and is cooled. The organic waste gas condenses into liquid asphalt tar and is stored in the buffer tank 2 below. The low vaporization point components continue to move forward.

[0043] S4. Then, the low vaporization point components of each reactor 1 are collected into the main pipe through the branch pipe, and then enter the buffer bin 8 along the main pipe to be further cooled and a small amount of components are further condensed;

[0044] S5. Finally, the remaining organic waste gas enters the electric tar collector 81 and is further collected and adsorbed under the action of the high-voltage electric field force. Finally, the clean waste gas that meets the standards is discharged through the chimney 82.

[0045] The working principle and use process of the present invention are as follows: the motor 3 is started to drive the forward fan 31 to rotate, so that the exhaust gas in the reactor 1 enters the filter tube 11, and the exhaust gas enters the filter screen to filter out the dust. At the same time, the motor 3 drives the wedge block 1 35 to rotate, so that the wedge block 2 55 drives the nail plate 5 to approach the wire filter 41, and then the dredging nail 51 can dredge the filter hole 42 to avoid clogging of the wire filter 41. When the wedge block 2 55 is reset under the action of the spring 54, it drives the stopper 53 to hit the wire filter 41, causing the wire filter 41 to vibrate, further removing the initial dust, and allowing the dust-free exhaust gas to enter the slow After flushing the pipe 21, under the action of the reverse fan 32, the gas forward resistance is increased, the gas residence time is prolonged, the buffering effect is improved, the gas forward kinetic energy is reduced, and a foundation is laid for subsequent sedimentation. At the same time, the exhaust gas can enter the filter tube 11 again through the return pipe 22, and the exhaust gas can be cooled, so that when the exhaust gas passes through the cotton tube 62, the cotton tube 62 can absorb the gasified tar, and the mounting frame 61 drives one end of the cotton tube 62 to rotate forward and reverse, so as to achieve the effect of screwing out the liquefied tar, and the liquefied tar enters the buffer tank 2 through the drain pipe 12, thereby improving the tar capture efficiency and reducing the pressure of subsequent processes.

[0046] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A tail gas treatment device for negative electrode material granulation, comprising a reactor (1) and a buffer tank (2), characterized in that: The top outer wall of the reactor (1) is connected to a filter tube (11) through bolts, and the top outer wall of the buffer tank (2) is connected to a buffer tube (21) through bolts. The buffer tube (21) is connected to the filter tube (11). A motor (3) is welded on the outer wall of the filter tube (11). The main shaft of the motor (3) passes through the filter tube (11) and extends into the buffer tube (21). A bracket (4) is welded on the inner wall of the filter tube (11). A steel wire filter (41) is welded on the outer wall of the bracket (4). A plurality of filter holes (42) are distributed on the steel wire filter (41). The filter holes (42) can filter dust in the organic waste gas. A pair of symmetrically distributed slide rods (52) are slidably inserted in the filter holes (42). Each of the slide rods (52) is away from one side of the motor (3). A nail plate (5) is welded on the outer wall of each end, and a plurality of dredging nails (51) are welded on the outer wall of each nail plate (5) close to the steel wire filter (41), and the dredging nails (51) are matched with the filter holes (42). A spring (54) is welded between the outer wall of each nail plate (5) and the outer wall of the steel wire filter (41), and the spring (54) is sleeved on the outer wall of the slide rod (52). A wedge block 2 (55) is welded on the outer wall of each nail plate (5) away from the steel wire filter (41). The main shaft of the motor (3) passes through the bracket (4) and the nail plate (5). A wedge block 1 (35) is welded on the outer wall of the main shaft section of the motor (3) close to the wedge block 2 (55), and the wedge block 1 (35) is matched with the wedge block 2 (55). A tar filtering mechanism is provided in the filter tube (11); The tar filtering mechanism comprises a cotton cylinder (62), a fixing frame (13) is welded on the inner wall of the transition between the filter tube (11) and the buffer tube (21), a mounting shaft (6) is rotatably inserted at the center of the fixing frame (13), the mounting shaft (6) extends into the filter tube (11), a mounting frame (61) is welded on the end wall of the mounting shaft (6) on one side of the filter tube (11), a cotton cylinder (62) is slidably sleeved on the outer wall of the mounting shaft (6), the two ends of the cotton cylinder (62) are respectively bonded to the outer walls of the mounting frame (61) and the fixing frame (13), and ventilation holes are provided on the outer walls of the mounting frame (61) and the fixing frame (13); A forward fan (31) is welded on the outer wall of the main shaft section of the motor (3) near the filter tube (11) and the buffer tube (21), and the forward fan (31) can draw the gas in the reactor (1) into the buffer tube (21). A reverse fan (32) is welded on the end of the main shaft of the motor (3), and the reverse fan (32) can blow air into the filter tube (11); The bottom of the filter tube (11) is connected to a drain tube (12), and the drain tube (12) is located between the mounting frame (61) and the wedge-shaped block (35). The inner wall diameter of the filter tube (11) close to the drain tube (12) gradually increases, and the inner wall diameter of the buffer tube (21) away from the filter tube (11) gradually increases. Heat conducting plates (23) are welded to the outer walls of the filter tube (11) and the buffer tube (21). A return pipe (22) is connected to the outer wall of the buffer pipe (21), and the return pipe (22) extends to the top of the cotton cylinder (62). The return pipe (22) is located in the wind direction of the reverse fan (32).

2. The tail gas treatment device for negative electrode material granulation according to claim 1, characterized in that: A stopper (53) is welded on the outer wall of one end of the sliding rod (52) close to the motor (3), and the diameter of the stopper (53) is larger than the diameter of the filter hole (42).

3. The tail gas treatment device for negative electrode material granulation according to claim 2, characterized in that: A pair of large gears (7) are rotatably plugged into the outer wall of the fixing frame (13) on one side close to the buffer tube (21), a small gear (71) is welded on the outer wall of each large gear (7), and the planes where the two small gears (71) are located are distributed in a stepped manner. A central gear (63) is welded on the outer wall of one end of the installation shaft (6) close to the buffer tube (21), and the central gear (63) and the large gear (7) are meshed with each other. The main shaft of the motor (3) passes through the installation shaft (6).

4. The tail gas treatment device for negative electrode material granulation according to claim 3, characterized in that: A large gear ring (33) and a small gear ring (34) are welded on the outer wall of the main shaft section of the motor (3) close to the small gear (71), and the large gear ring (33) and the small gear ring (34) are both adapted to the small gear (71). The large gear ring (33) and the small gear ring (34) are distributed in a stepped manner, the large gear ring (33) is an internal tooth, and the small gear ring (34) is an external tooth.

5. A method for treating tail gas used in granulation of negative electrode materials, characterized in that: The invention relates to an exhaust gas treatment device for granulating negative electrode materials as claimed in claim 4, which comprises the following steps: first, dust-containing high-temperature organic waste gas enters the filter tube (11) under the action of a forward fan (31), and the organic waste gas first passes through a wire filter (41) to filter out dust, where the dust falls back to the reactor (1) and continues to be used as raw material, and the dust-free high-temperature waste gas enters the buffer tube (21), and the tar vaporized in the waste gas is captured by a cotton cylinder (62), and then the waste gas continues to enter the next process, and secondly, the dust-free high-temperature organic waste gas enters the exhaust buffer tank (2) for buffering and reducing the flow rate, and the waste gas The sedimentation material is first settled, which effectively avoids the problem of particles and asphalt in the waste gas being deposited in the pipeline. Then, after the waste gas enters the buffer tank (2) and is cooled, the organic waste gas is condensed into liquid asphalt tar and stored in the buffer tank (2) below. The low vaporization point components continue to move forward. Then, the low vaporization point components of each reactor (1) are collected into the main pipe through the branch pipe and enter the buffer bin along the main pipe for further cooling. A small amount of components are further condensed. Finally, the remaining organic waste gas enters the electric tar collector and is further collected and adsorbed under the action of the high-voltage electric field force. Finally, the clean waste gas that meets the standards is discharged through the chimney.

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