Lithium battery pyrolysis material stripping and powder removing circulating airflow grading device

Abstract

The utility model discloses a lithium battery pyrolysis material stripping and powder removing circulating airflow grading device, relates to the technical field of lithium battery material separation, and aims to solve the problem that the separation effect and efficiency of lithium battery pyrolysis materials are poor. The lithium battery pyrolysis material stripping and powder removing circulating airflow grading device comprises a first winnowing device, a powder removing and aggregating device and a second winnowing device, the first winnowing device is used for separating materials into a first material and a second material, and the granularity of the first material is larger than that of the second material; the powder-removing and aggregating equipment comprises a first material inlet and a material outlet, the first material inlet is communicated with the discharge port, and the powder-removing and aggregating equipment is used for removing powder-shaped particles in the first material and processing the first material into lump-shaped particles so as to form a mixed material of the powder-shaped particles and the lump-shaped particles; the second winnowing equipment is provided with a second material inlet, and the second material inlet communicates with the material outlet and is used for enabling the mixed materials to enter the second winnowing equipment and be separated by the second winnowing equipment.

Description

Technical Field

[0001] This application relates to the field of lithium battery material separation technology, and in particular to a circulating airflow classification device for stripping and de-powdering lithium battery pyrolysis materials. Background Technology

[0002] With the development of the new energy industry, lithium batteries, as the main power source for new energy equipment, are widely used in various industries. As the number of lithium batteries increases, the number of used lithium batteries is also constantly rising, and directly disposing of used lithium batteries can easily cause environmental pollution.

[0003] To reduce the environmental pollution caused by waste lithium batteries, they are usually decomposed to obtain decomposed materials, which are then sorted for reuse. However, in related technologies, the sorting of materials after lithium battery decomposition is usually done using vibrating screens, which can easily lead to material clogging of the screen holes, affecting the sorting effect and efficiency. Utility Model Content

[0004] The purpose of this application is to provide a circulating airflow classification device for stripping and de-powdering lithium battery pyrolysis materials, which aims to solve the problem of poor sorting effect and efficiency of lithium battery decomposition materials in related technologies.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides a lithium battery pyrolysis material stripping and de-powdering circulating airflow classification device. The lithium battery pyrolysis material stripping and de-powdering circulating airflow classification device includes a first air classifier, a de-powdering and granulation device, and a second air classifier. The first air classifier is used to separate the material into a first material and a second material, wherein the particle size of the first material is larger than that of the second material. The first air classifier has a discharge port for discharging the first material. The de-powdering and granulation device includes a first material inlet and a material outlet. The first material inlet is connected to the discharge port for allowing the first material to enter the de-powdering and granulation device. The de-powdering and granulation device is used to remove the powdery particles from the first material and process the first material after the powdery particles are removed into granular particles to form a mixture of powdery particles and granular particles. The second air classifier has a second material inlet, which is connected to the material outlet for allowing the mixture to enter the second air classifier and be separated by the second air classifier.

[0007] The lithium battery pyrolysis material stripping and de-powdering circulating airflow classification device provided in this application embodiment can first separate the materials, separating the larger-sized first material from the smaller-sized second material. Then, the larger-sized first material is conveyed to a de-powdering and granulation device, where the powdery particles (i.e., electrode powder) attached to the first material (i.e., copper foil, aluminum foil) are detached. The detached first material (i.e., the first material without attached powdery particles) is then kneaded into granular particles (e.g., spherical particles). The powdery particles and granular particles are mixed together in the de-powdering and granulation device, forming a mixture. This mixture can enter a second air classification device through a material outlet and a second material inlet for further separation.

[0008] In this way, since the materials entering the second air separation equipment are powdery particles and lumpy particles, the maximum size of the mixture is reduced, which can prevent the mixture from clogging the second air separation equipment, thus ensuring that the second air separation equipment can smoothly separate the mixture and improve the separation efficiency and effect.

[0009] In some embodiments, the de-powdering and granulation equipment includes a combined peeling and de-powdering machine, which includes a first housing, a rotating shaft, and an agitator. The first housing has a first material inlet; the rotating shaft is rotatably connected inside the first housing; and the agitator is connected to the rotating shaft to agitate the first material so that the powdery particles in the first material are detached, and the first material after the powdery particles are detached is processed into granules.

[0010] In some embodiments, the agitator includes an impeller and a friction bar connected to a rotating shaft. The impeller is used to move the first material and is capable of agitating the first material. The friction bar is connected to the rotating shaft and is used to agitate the first material.

[0011] In some embodiments, the first housing is further provided with a discharge port; the de-powdering and granulation equipment also includes a friction granulator, which includes a second housing and a rotor. The second housing is provided with a receiving port and a material outlet, and the receiving port is connected to the discharge port. A grinding plate is provided on the inner wall of the second housing. The rotor is rotatably connected to the second housing, and a friction blade is provided on the rotor. The friction blade cooperates with the grinding plate to break up the clumps of particles.

[0012] In some embodiments, the first air separation device includes a circulating positive and negative pressure air separator and a first turbine air classifier. The circulating positive and negative pressure air separator has a first discharge port and a first air outlet. The circulating positive and negative pressure air separator is used to separate materials into a third material and a fourth material. The particle size of the third material is larger than that of the fourth material. The third material is discharged through the first discharge port. The first turbine air classifier has a second inlet and a discharge port. The second inlet is connected to the first air outlet so that the fourth material enters the turbine air classifier. The first turbine air classifier is used to separate the fourth material into a first material and a second material.

[0013] In some embodiments, the circulating positive and negative pressure air separator further has a first return air inlet, and the first turbine air classifier has a second air outlet; the first air separator further includes a first induced draft fan, a first return air duct, and a first exhaust valve, the inlet of the first induced draft fan being connected to the second air outlet; one end of the first return air duct being connected to the outlet of the first induced draft fan, and the other end of the first return air duct being connected to the first return air inlet; the inlet of the first exhaust valve being connected to the first return air duct, and the outlet of the first exhaust valve being connected to the outside.

[0014] In some embodiments, the first air separation device further includes a first cyclone collector and a first dust collector. The first cyclone collector has a third inlet and a third outlet, and the third inlet is connected to a second outlet. The second material enters the first cyclone collector through the second outlet and the third inlet and is separated by the first cyclone collector. The first dust collector has a fourth inlet and a fourth outlet, and the fourth inlet is connected to the third outlet. The fourth outlet is connected to the inlet of the first induced draft fan.

[0015] In some embodiments, the second air separation device includes a second turbine air classifier.

[0016] In some embodiments, the de-powdering and granulation equipment has a second return air inlet, and the second turbine air classifier has a second material inlet and a fifth air outlet; the second air separation equipment further includes a second induced draft fan, a second return air duct, and a second exhaust valve, wherein the inlet of the second induced draft fan is connected to the fifth air outlet; one end of the second return air duct is connected to the outlet of the second induced draft fan, and the other end of the second return air duct is connected to the second return air inlet; the inlet of the second exhaust valve is connected to the second return air duct, and the outlet of the second exhaust valve is connected to the outside.

[0017] In some embodiments, the second air separation device further includes a second cyclone collector and a second dust collector. The second cyclone collector has a sixth inlet and a sixth outlet, and the sixth inlet is connected to the fifth outlet. The second dust collector has a seventh inlet and a seventh outlet, and the seventh inlet is connected to the sixth outlet, and the seventh outlet is connected to the inlet of the second induced draft fan. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the lithium battery pyrolysis material stripping, de-powdering, and circulating airflow classification device provided in the embodiments of this application.

[0020] Figure label:

[0021] 1. First air classifier; 11. Discharge port; 12. First closed-loop discharge device; 13. Circulating positive and negative pressure air classifier; 131. First discharge port; 132. First air outlet; 133. Second closed-loop discharge device; 134. First feed inlet; 135. First return air outlet; 14. First turbine air classifier; 141. Second feed inlet; 142. Second air outlet; 15. First induced draft fan; 16. First return air duct; 17. First exhaust valve; 18. First cyclone collector; 181. Third feed inlet; 182. Third air outlet; 183. Third discharge port; 184. Fourth closed-loop discharge device; 19. First dust collector; 191. Fourth feed inlet; 192. Fourth air outlet; 193. Fourth discharge port; 194. Fifth closed-loop discharge device;

[0022] 2. De-powdering and granulation equipment; 21. First material inlet; 22. Material outlet; 23. Combined peeling and de-powdering machine; 231. Discharge port; 24. Friction granulator; 241. Material receiving port; 25. Gravity valve; 26. Second return air outlet;

[0023] 3. Second air classifier; 31. Second material inlet; 32. Second turbine air classifier; 321. Fifth discharge port; 322. Sixth closed-loop discharge device; 323. Fifth air outlet; 33. Second induced draft fan; 34. Second return air duct; 35. Second exhaust valve; 36. Second cyclone collector; 361. Sixth feed inlet; 362. Sixth air outlet; 363. Sixth discharge port; 364. Seventh closed-loop discharge device; 37. Second dust collector; 371. Seventh feed inlet; 372. Seventh air outlet; 373. Seventh discharge port; 374. Eighth closed-loop discharge device;

[0024] 4. Material hopper; 41. Air cannon; 5. Third closed-loop discharge device; 6. Third dust collector. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0028] This application provides a lithium battery pyrolysis material stripping and de-powdering circulating airflow classification device for separating materials after lithium battery decomposition, facilitating the recycling of the separated materials. The materials after lithium battery decomposition mainly include electrode powder, copper foil, aluminum foil, copper granules, aluminum granules, and larger pieces of copper, aluminum, and aluminum alloys. The separation of materials primarily involves separating different materials such as electrode powder, copper, and aluminum of different particle sizes.

[0029] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of the lithium battery pyrolysis material stripping and de-powdering circulating airflow classification device provided in the embodiments of this application. The lithium battery pyrolysis material stripping and de-powdering circulating airflow classification device includes a first air classifier 1, a de-powdering and agglomeration device 2, and a second air classifier 3.

[0030] The first air separation device 1 is used to separate materials into a first material and a second material, where the particle size of the first material is larger than that of the second material. The first air separation device 1 separates the materials into two categories, the first material and the second material, based on their particle size using airflow. Because the first material has a larger particle size than the second material, it falls to the bottom of the first air separation device 1, while the second material is carried away by the airflow, facilitating further collection of the second material.

[0031] The first material can be a relatively large material such as copper foil or aluminum foil. The second material can be electrode powder. In other words, the electrode powder can be separated first by controlling the airflow of the first air classifier 1.

[0032] The first air classifier 1 has a discharge port 11 for discharging a first material. In some examples, the discharge port 11 is located at the bottom of the first air classifier 1.

[0033] The de-powdering and granulation equipment 2 includes a first material inlet 21 and a material outlet 22. The first material inlet 21 is connected to the discharge port 11 and is used to allow the first material to enter the de-powdering and granulation equipment 2. The de-powdering and granulation equipment 2 is used to remove the powder particles in the first material and process the first material after the powder particles are removed into granules to form a mixture of powder particles and granules.

[0034] In other words, the first material can be copper foil or aluminum foil, but some powdery particles, such as granules, may be attached to the copper foil or aluminum foil. In order to improve the separation accuracy of the materials, it is necessary to separate the powdery particles attached to the first material as well. Therefore, it is necessary to remove the powdery particles from the first material first in order to facilitate separation.

[0035] Furthermore, since the copper foil and aluminum foil in the first material have large particle sizes or dimensions, they are prone to clogging during subsequent separation of the first material. Therefore, the powder granulation equipment 2 can be used to knead the first material after the powder particles are separated into clumps to reduce the maximum size of the first material and thus reduce the probability of clogging.

[0036] The second air separation device 3 has a second material inlet 31, which is connected to a material outlet 22. This inlet allows the mixed materials to enter and be separated by the second air separation device 3. The second air separation device 3 further separates the mixed materials to improve the separation accuracy.

[0037] With the above setup, the first air classifier 1 can first separate the materials, separating the larger-sized first material from the smaller-sized second material. Then, the larger-sized first material is conveyed to the de-powdering and granulation device 2, where the powdery particles (i.e., the powder) attached to the first material (i.e., copper foil, aluminum foil) are detached from the first material. The detached first material (i.e., the first material without attached powdery particles) is then kneaded into granular aggregates (e.g., spherical aggregates). The powdery particles and granular aggregates are mixed together in the de-powdering and granulation device 2, forming a mixture. This mixture can then enter the second air classifier 3 through the material outlet 22 and the second material inlet 31 for further separation.

[0038] In this way, since the material entering the second air separation device 3 is powdery particles and agglomerated particles, the maximum size of the mixture is reduced, thereby avoiding the blockage of the second air separation device 3 caused by the mixed material, ensuring that the second air separation device 3 can smoothly separate the mixed material, and improving the separation efficiency and separation effect.

[0039] Furthermore, compared to separating materials through a vibrating screen, separating materials through the first air separation device 1 and the second air separation device 3 can reduce vibration and noise, thereby preventing the equipment from being affected by vibration and reducing noise pollution.

[0040] In some embodiments, the de-powdering and granulation equipment 2 includes a combined peeling and de-powdering machine 23, which includes a first housing, a rotating shaft, and an agitator. The first housing has a first material inlet 21; the rotating shaft is rotatably connected inside the first housing; the agitator is connected to the rotating shaft and is used to agitate the first material to dislodge powdery particles from the first material and process the first material after the powdery particles have been dislodged into granules.

[0041] In other words, the first material enters the first housing from the discharge port 11 of the first air classifier 1. The rotating shaft inside the first housing rotates, driving the agitator to rotate, so as to agitate the first material. During the agitation process, the first material will continuously vibrate and tumble, so that the powder particles on the first material are subjected to force and fall off the first material, so that the powder particles can be separated in the subsequent process.

[0042] Furthermore, during the agitation of the first material by the agitator, the first material is squeezed and kneaded, thus turning into clump-shaped particles. After the same material changes from flakes to clumps, the maximum size will decrease. Therefore, when the powdered particles and clump-shaped particles are fed into the second air classifier 3 for separation, the risk of clogging the second air classifier 3 can be reduced.

[0043] The powdered particles are separated by agitating the first material and kneaded into granular clumps. The structure is simple, easy to operate, and can improve work efficiency.

[0044] In some embodiments, the agitator may include an impeller and a friction rod. The impeller is connected to a rotating shaft and is used to move and agitate the first material. The friction rod is connected to the rotating shaft and is used to agitate the first material.

[0045] For example, the first housing can be a cylindrical structure, and the axis of the rotating shaft is consistent with the axis of the first housing. By rotating the rotating shaft, the blades can be driven to rotate, thereby causing the blades to push the first material to move. During the movement of the first material, the friction rod also rotates with the rotating shaft. The friction rod will agitate and knock the first material, thereby causing the first material to vibrate and causing the powdery particles attached to the first material to fall off.

[0046] Furthermore, during the movement of the first material, it will be squeezed and kneaded by the blades and friction rods and turned into clumps of particles.

[0047] In some examples, the interior of the first housing is a closed space to prevent leakage of the first material.

[0048] In some examples, the blades can be helical blades, propeller blades, etc.

[0049] In some examples, the blades can be metal blades, such as aluminum alloy blades, aluminum blades, stainless steel blades, etc. The blades can also be wear-resistant non-metallic blades, such as polytetrafluoroethylene blades, polyurethane blades, PVC blades, etc.

[0050] In some examples, the friction rod can be a metal rod, such as an aluminum alloy rod, an aluminum rod, a stainless steel rod, etc. The blade can also be a wear-resistant non-metallic rod, such as a polytetrafluoroethylene rod, a polyurethane rod, a PVC rod, etc.

[0051] In some examples, the combined stripping and de-dusting machine 23 also includes a first motor, the output shaft of which is connected to the rotating shaft. The first motor drives the rotating shaft to rotate, thereby causing the blades and friction rods to rotate.

[0052] In other embodiments, the de-powdering and granulation equipment 2 may also be other equipment capable of removing powdery particles from the first material and processing the first material into granular particles. For example, the de-powdering and granulation equipment 2 may include a vibrator and an extruder.

[0053] In some embodiments, a first closed-loop discharge device 12 may be provided at the discharge port 11 and the first material inlet 21. The first closed-loop discharge device 12 controls the amount of the first material discharged from the discharge port 11 to the first material inlet 21.

[0054] In some embodiments, the first casing is further provided with a discharge port 231. The de-powdering and granulation equipment 2 also includes a friction granulator 24, which includes a second casing and a rotor. The second casing is provided with a receiving port 241 and a material outlet 22, and the receiving port 241 communicates with the discharge port 231; a grinding plate is provided on the inner wall of the second casing. The rotor is rotatably connected to the second casing, and a friction blade is provided on the rotor. The friction blade cooperates with the grinding plate to break up the clumps of particles.

[0055] In this way, after the powdery particles on the first material are removed by the combined stripping and de-powdering machine 23 and the first material is kneaded into clumps, the mixed particles formed by the powdery particles and clumps can be conveyed into the second casing through the discharge port 231 and the receiving port 241. Then, the rotor rotates, driving the friction blades to rotate, which in turn causes the friction blades and the grinding plate to rotate relative to each other. This allows the mixed particles entering the second casing to continuously collide and rub against the friction blades and the grinding plate, thereby crushing the clumps in the mixed particles and making the clumps smaller. After being further processed by the friction granulator 24, the smaller clumps and powdery particles enter the second air classifier 3, which can further avoid clogging of the second air classifier 3, thereby further improving the separation efficiency of the material.

[0056] In some examples, the interior space of the second housing can be an enclosed space, thus preventing leakage of mixed particles that may enter the second housing.

[0057] In some examples, the grinding plate can be a plate-like structure with multiple teeth.

[0058] In some examples, the toothed plate can be a metal plate, such as an aluminum alloy plate, an aluminum plate, a stainless steel plate, etc. The toothed plate can also be a wear-resistant non-metallic plate, such as a polytetrafluoroethylene plate, a polyurethane plate, a PVC plate, etc.

[0059] In some examples, the friction blade can be a metal blade, such as an aluminum alloy blade, an aluminum blade, a stainless steel blade, etc. The blade can also be a wear-resistant non-metallic blade, such as a polytetrafluoroethylene blade, a polyurethane blade, a PVC blade, etc.

[0060] In some examples, the friction pelletizer 24 also includes a second motor, the output shaft of which is connected to the rotor. The second motor drives the rotor to rotate, thereby causing the friction blades to rotate.

[0061] In some examples, the rotor can be a shaft-like structure, a plate-like structure, and so on.

[0062] In some embodiments, a gravity valve 25 is also provided between the discharge port 231 and the receiving port 241. When the mixture in the first housing accumulates to a certain weight, the gravity valve 25 will open to convey the mixture into the second housing of the friction pelletizer 24.

[0063] In some embodiments, the first air separation device 1 includes a circulating positive and negative pressure air separator 13 and a first turbine air classifier 14. The circulating positive and negative pressure air separator 13 has a first discharge port 131 and a first air outlet 132. The circulating positive and negative pressure air separator 13 is used to separate materials into a third material and a fourth material. The particle size of the third material is larger than that of the fourth material. The third material is discharged through the first discharge port 131.

[0064] The first turbine air classifier 14 has a second inlet 141 and a discharge outlet 11. The second inlet 141 is connected to the first outlet 132 so that the fourth material enters the first turbine air classifier 14. The first turbine air classifier 14 is used to separate the fourth material into the first material and the second material.

[0065] The circulating positive and negative pressure air classifier 13 is used for initial separation of materials to separate the larger particle sizes, that is, to separate the materials into a third material and a fourth material. The particle size of the third material is larger than that of the fourth material. The third material is discharged through the first discharge port 131 to prevent it from entering the second air classifier 3 and causing blockage. For example, the third material can be larger pieces of copper, aluminum, aluminum alloy, etc. The fourth material can be a mixture of powder, copper foil, and aluminum foil.

[0066] After the third material is separated by the circulating positive and negative pressure air classifier 13, the fourth material is conveyed by the air in the circulating positive and negative pressure air classifier 13 through the first air outlet 132 and the second feed inlet 141 to the first turbine air classifier 14, where the fourth material is separated again into the first material and the second material. The particle size of the first material is larger than that of the second material.

[0067] The first material enters the de-powdering and granulation equipment 2 through the discharge port 11 and the first material inlet 21 for further processing. Specifically, the first material enters the combined stripping and de-powdering machine 23. The second material is separated out by the air in the first turbine air classifier 14 so that it can enter the next process.

[0068] In this way, the material is initially separated by the circulating positive and negative pressure air separator 13 and the first turbine classifier, separating the material with larger particle size (third material) and the material with smaller particle size (second material). Then, the material with intermediate particle size is further processed separately, thereby improving the processing efficiency and the separation accuracy of the material.

[0069] The circulating positive and negative pressure air separator 13 relies on the positive and negative pressure difference inside the separator to achieve precise material classification through airflow control. When materials enter the separator, they are subjected to positive and negative pressure, causing materials of different densities and particle sizes to be separated to different outlets (i.e., the first discharge port 131 and the first air outlet 132), thus achieving material grading and separation. The circulating positive and negative pressure air separator 13 can efficiently and accurately separate third-party materials, improving separation accuracy and efficiency.

[0070] The first turbine air classifier 14 uses a high-speed rotating turbine to generate a large centrifugal force on the fourth material entering the classifier. Larger particles (the first material) fall downwards along the inner wall of the classifier's casing, while smaller particles (the second material) are discharged with the airflow to the next process, thus classifying the fourth material. The first turbine air classifier 14 can efficiently and accurately separate the second material, improving separation accuracy and efficiency.

[0071] In some examples, the first discharge port 131 is located at the lower end of the circulating positive and negative pressure air separator 13, and the first discharge port 131 is equipped with a second closed-loop discharge device 133. The amount of third material discharged through the first discharge port 131 is controlled by the second closed-loop discharge device 133.

[0072] In some examples, the first turbine air classifier 14, the combined stripper and powderer 23, and the friction pelletizer 24 are arranged sequentially from top to bottom, which facilitates the conveying of materials under gravity, thereby simplifying the material conveying method and the equipment structure.

[0073] In some embodiments, the lithium battery pyrolysis material stripping and de-powdering circulating airflow classification device further includes a hopper 4 and a third closed-loop discharge device 5. The circulating positive and negative pressure air classifier 13 also has a first feed inlet 134. The discharge outlet of the hopper 4 is connected to the first feed inlet 134 through the third closed-loop discharge device 5, so that the material in the hopper 4 can enter the circulating positive and negative pressure air classifier 13.

[0074] In some examples, silo 4 is a closed silo. The lithium battery pyrolysis material stripping and de-powdering circulating airflow classification device also includes a third dust collector 6, the inlet of which is connected to silo 4 for dust removal within silo 4.

[0075] In some examples, the hopper 4 is also equipped with an air cannon 41. The air cannon 41 can be a nitrogen cannon, an argon cannon, etc. The air cannon 41 can spray a strong airflow into the hopper 4, generating an expansion shock wave that instantly disperses the material inside the hopper, preventing material accumulation and blockage that could lead to poor material discharge.

[0076] In some embodiments, the circulating positive and negative pressure air separator 13 further has a first return air inlet 135, and the first turbine air classifier 14 has a second air outlet 142.

[0077] The first air separation device 1 also includes a first induced draft fan 15, a first return air duct 16, and a first exhaust valve 17. The inlet of the first induced draft fan 15 is connected to the second air outlet 142. One end of the first return air duct 16 is connected to the outlet of the first induced draft fan 15, and the other end of the first return air duct 16 is connected to the first return air outlet 135. The inlet of the first exhaust valve 17 is connected to the first return air duct 16, and the outlet of the first exhaust valve 17 is connected to the outside.

[0078] The first induced draft fan 15 and the first return air duct 16 can draw the air from the circulating positive and negative pressure air separator 13 and the first turbine air classifier 14 to the first return air duct 16, and then return it to the circulating positive and negative pressure air separator 13 through the first return air duct 16, so as to realize the recycling of wind power, thereby improving the utilization efficiency of wind power and reducing energy consumption costs.

[0079] When the pressure within the first system formed by the circulating positive and negative pressure air separator 13, the first turbine air classifier 14, the first induced draft fan 15, and the first return air duct 16 is too high, the first exhaust valve 17 can be opened to a suitable degree to discharge the waste gas from the first system, thereby stabilizing the pressure of the first system and regulating the circulating air volume. Conversely, when the pressure within the first system is not high, the first exhaust valve 17 can be closed to prevent the discharge of waste gas. This reduces waste gas emissions and environmental pollution.

[0080] In some embodiments, the first air separation device 1 further includes a first cyclone collector 18 and a first dust collector 19. The first cyclone collector 18 has a third inlet 181 and a third outlet 182, the third inlet 181 being connected to a second outlet 142; the second material enters the first cyclone collector 18 through the second outlet 142 and the third inlet 181, and is separated by the first cyclone collector 18. The first dust collector 19 has a fourth inlet 191 and a fourth outlet 192, the fourth inlet 191 being connected to the third outlet 182, and the fourth outlet 192 being connected to the inlet of the first induced draft fan 15.

[0081] The second material entering the first cyclone collector 18 is subjected to the action of rotating wind. The larger particles of the second material fall downwards along the inner wall of the first cyclone collector 18 to the bottom of the first cyclone collector 18 under the action of centrifugal force. The smaller particles of the second material are carried by the wind through the third air outlet 182 and the fourth feed inlet 191 into the first dust collector 19. The first dust collector 19 filters and collects the smaller particles of the second material. The exhaust gas filtered by the first dust collector 19 is drawn into the first return air duct 16 by the first induced draft fan 15 and re-enters the circulating positive and negative pressure air separator 13.

[0082] In this way, the second material can be further classified and separated by the first cyclone collector 18 and the first dust collector 19, thereby improving the separation accuracy of the second material.

[0083] In some examples, the first dust collector 19 can be an electrostatic precipitator, a bag filter, a cartridge filter, etc.

[0084] In some examples, the lower end of the first cyclone collector 18 is also provided with a third discharge port 183, and the third discharge port 183 is provided with a fourth closed-loop discharge device 184. The larger particle size portion of the second material separated by the first cyclone collector 18 can be discharged and collected through the fourth closed-loop discharge device 184.

[0085] In some examples, the lower end of the first dust collector 19 is also provided with a fourth discharge port 193, and the fourth discharge port 193 is provided with a fifth closed-loop discharge device 194. The smaller particle size portion of the second material filtered and collected by the first dust collector 19 can be discharged and collected through the fifth closed-loop discharge device 194.

[0086] In some embodiments, the second air separation device 3 includes a second turbine air classifier 32. The working principle of the second turbine air classifier 32 is the same as that of the first turbine air classifier 14, and will not be described in detail here.

[0087] The second turbine air classifier 32 can efficiently and accurately separate the mixture, thereby improving separation accuracy and efficiency.

[0088] The mixture contains polar powder, copper particles, and aluminum particles. The copper and aluminum particles are larger than the polar powder. The larger copper and aluminum particles are separated by a second turbine air classifier 32 and fall to the bottom of the classifier.

[0089] In some examples, the lower end of the second turbine air classifier 32 has a fifth outlet 321, and the fifth outlet 321 is equipped with a sixth closed-loop discharge device 322. The copper and aluminum particles separated by the second turbine air classifier 32 can be discharged and collected through the sixth closed-loop discharge device 322.

[0090] In some embodiments, the de-powdering and granulation device 2 has a second return air inlet 26. Specifically, the second return air inlet 26 may be provided on the friction granulator 24.

[0091] The second turbine air classifier 32 has a second material inlet 31 and a fifth air outlet 323. The extreme powder separated by the second turbine air classifier 32 can be discharged through the fifth air outlet 323.

[0092] The second air separation device 3 also includes a second induced draft fan 33, a second return air duct 34, and a second exhaust valve 35. The inlet of the second induced draft fan 33 is connected to the fifth air outlet 323. One end of the second return air duct 34 is connected to the outlet of the second induced draft fan 33, and the other end of the second return air duct 34 is connected to the second return air outlet 26. The inlet of the second exhaust valve 35 is connected to the second return air duct 34, and the outlet of the second exhaust valve 35 is connected to the outside.

[0093] By using the second exhaust fan 33 and the second return air duct 34, the air in the friction pelletizer 24 and the second turbine air classifier 32 can be drawn to the second return air duct 34 and returned to the friction pelletizer 24 through the second return air duct 34, so as to realize the recycling of wind power, thereby improving the utilization efficiency of wind power and reducing energy consumption costs.

[0094] When the pressure in the second system formed by the friction granulator 24, the second turbine air classifier 32, the second induced draft fan 33, and the second return air duct 34 is too high, the second exhaust valve 35 can be opened to a suitable degree to discharge the waste gas in the second system, thereby stabilizing the pressure and regulating the circulating air volume of the second system. Conversely, when the pressure in the second system is not high, the second exhaust valve 35 can be closed to prevent the discharge of waste gas. This reduces waste gas emissions and environmental pollution.

[0095] In some embodiments, the second air separation device 3 further includes a second cyclone collector 36 and a second dust collector 37. The second cyclone collector 36 has a sixth inlet 361 and a sixth outlet 362, the sixth inlet 361 being connected to a fifth outlet 323. The second dust collector 37 has a seventh inlet 371 and a seventh outlet 372, the seventh inlet 371 being connected to the sixth outlet 362, and the seventh outlet 372 being connected to the inlet of the second induced draft fan 33.

[0096] The electrode powder entering the second cyclone collector 36 is subjected to the force of the rotating airflow. Larger particles fall downwards along the inner wall of the second cyclone collector 36 due to centrifugal force. Smaller particles are carried by the airflow through the sixth outlet 362 and the seventh inlet 371 into the second dust collector 37. The second dust collector 37 filters and collects the smaller particles. The filtered exhaust gas is then drawn into the second return air duct 34 by the second induced draft fan 33 and re-enters the de-powdering and granulation equipment 2, specifically the friction granulator 24.

[0097] In this way, the electrode powder can be further classified and separated by the second cyclone collector 36 and the second dust collector 37, thereby improving the separation accuracy of the electrode powder.

[0098] In some examples, the second dust collector 37 can be an electrostatic precipitator, a bag filter, a cartridge filter, etc.

[0099] In some examples, the lower end of the second cyclone collector 36 is also provided with a sixth discharge port 363, and the sixth discharge port 363 is provided with a seventh closed-loop discharge device 364. The larger particle size portion of the extreme powder separated by the second cyclone collector 36 can be discharged and collected through the seventh closed-loop discharge device 364.

[0100] In some examples, the lower end of the second dust collector 37 is also provided with a seventh discharge port 373, and the seventh discharge port 373 is provided with an eighth closed-loop discharge device 374. The smaller particles in the dust collected by the second dust collector 37 can be discharged and collected through the eighth closed-loop discharge device 374.

[0101] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A lithium battery pyrolysis material stripping defluffing circulating gas flow classification device, characterized in that, The application relates to a device for separating and processing material, comprising: a first air separation device for separating material into first material and second material, the first material having a larger particle size than the second material; the first air separation device having a discharge port for discharging the first material; a de-dusting and granulating device comprising a first material inlet and a material outlet, the first material inlet being in communication with the discharge port for feeding the first material into the de-dusting and granulating device, the de-dusting and granulating device being used for removing powder particles from the first material and processing the first material after the powder particles are removed into granular particles to form a mixture of the powder particles and the granular particles; a second air separation device having a second material inlet in communication with the material outlet for feeding the mixture into the second air separation device and separating the mixture by the second air separation device.

2. The lithium battery pyrolysis material peel-off and de-powdering circulating gas flow classification device according to claim 1, characterized in that, The de-dusting and granulating device comprises a combined stripping and de-dusting machine, which comprises: a first casing having the first material inlet; a rotating shaft rotatably connected in the first casing; an agitating member connected to the rotating shaft for agitating the first material to remove powder particles from the first material and processing the first material after the powder particles are removed into granular particles.

3. The lithium battery pyrolysis material peel-off and de-powdering circulating gas flow classification device according to claim 2, characterized in that, The agitating member comprises: an impeller connected to the rotating shaft, the impeller being used for pushing the first material to move and capable of agitating the first material; a friction rod connected to the rotating shaft for agitating the first material.

4. The lithium battery pyrolysis material peeling off and de-powdering circulating gas flow classification device according to claim 2, characterized in that, The first casing is further provided with a discharge port; the de-dusting and granulating device further comprises a friction granulator, which comprises: a second casing provided with a receiving port in communication with the discharge port and the material outlet; the second casing is provided with a toothed plate on an inner wall thereof; a rotor rotatably connected in the second casing, the rotor being provided with friction blades, the friction blades cooperating with the toothed plate to crush the granular particles.

5. The lithium battery pyrolysis material peel and de-powdering circulating gas flow fractionation apparatus of any one of claims 1-4, wherein, The first air separation device comprises: a circulating positive and negative pressure air separation machine having a first discharge port and a first air outlet, the circulating positive and negative pressure air separation machine being used for separating material into third material and fourth material, the third material having a larger particle size than the fourth material, the third material being discharged through the first discharge port; a first turbo air classifier having a second material inlet in communication with the first air outlet for feeding the fourth material into the turbo air classifier; the first turbo air classifier being used for separating the fourth material into the first material and the second material.

6. The lithium battery pyrolysis material peel and de-powdering circulating gas flow classification device according to claim 5, characterized in that, The circulating positive and negative pressure air separation machine is further provided with a first air return port, and the first turbo air classifier is provided with a second air outlet; The first air separation device further comprises: a first air blower, an inlet of the first air blower being in communication with the second air outlet; a first air return pipe, one end of the first air return pipe being in communication with an outlet of the first air blower, and the other end of the first air return pipe being in communication with the first air return port. A first exhaust valve, an inlet of the first exhaust valve being communicated with the first return air pipe, and an outlet of the first exhaust valve being communicated with the outside.

7. The lithium battery pyrolysis material peel and de-powdering circulating gas flow classification device according to claim 6, characterized in that, The first air separation device further comprises: A first cyclone collector having a third inlet and a third outlet, the third inlet being communicated with the second outlet, the second material entering the first cyclone collector through the second outlet and the third inlet and being separated by the first cyclone collector; A first dust collector having a fourth inlet and a fourth outlet, the fourth inlet being communicated with the third outlet, and the fourth outlet being communicated with the inlet of the first air blower.

8. The lithium battery pyrolysis material peel-off dust removal circulating gas flow classification device according to any one of claims 1-4, characterized in that, The second air separation device comprises a second turbo air flow classifier.

9. The lithium battery pyrolysis material peel-off and de-powdering circulating gas flow fractionation apparatus of claim 8, wherein, The de-pulping and granulating device has a second return air outlet, and the second turbo air flow classifier has the second material inlet and a fifth outlet; The second air separation device further comprises: A second air blower, an inlet of the second air blower being communicated with the fifth outlet; A second return air pipe, one end of the second return air pipe being communicated with the outlet of the second air blower, and the other end of the second return air pipe being communicated with the second return air outlet; A second exhaust valve, an inlet of the second exhaust valve being communicated with the second return air pipe, and an outlet of the second exhaust valve being communicated with the outside.

10. The lithium battery pyrolysis material peel and de-powdering circulating gas flow classification device according to claim 9, characterized in that, The second air separation device further comprises: A second cyclone collector having a sixth inlet and a sixth outlet, the sixth inlet being communicated with the fifth outlet; A second dust collector having a seventh inlet and a seventh outlet, the seventh inlet being communicated with the sixth outlet, and the seventh outlet being communicated with the inlet of the second air blower.

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