A recycling device for waste charged lithium batteries

Abstract

The present invention relates to the technical field of battery recycling, and discloses a recycling and processing device for waste charged lithium batteries, including an electrolyte processing unit and a material separation unit connected to each other, the electrolyte processing unit including a crusher and a dryer connected to the crusher; the material separation unit includes a first separation system, a second separation system and a third separation system with gradually decreasing air volume, and the second separation system and the third separation system are both connected to the first separation system. When the charged lithium battery is processed, the protective gas reduces the oxygen content inside the crusher, and at the same time takes away the heat of the lithium battery, so that it does not have the conditions for fire or explosion, isolates the chemical reaction and friction heat generation effect in the crushing process, ensures the safety of lithium battery processing, and at the same time utilizes the dryer to evaporate and volatilize the electrolyte, and a liquid electrolyte can be obtained after condensation by a condensation device, and the uncondensed gas can be processed by an alkali solution spraying device to protect the safety of the ecological environment.

Description

Technical Field

[0001] The invention relates to the technical field of battery recycling, and in particular to a recycling and processing device for waste charged lithium batteries. Background Art

[0002] According to the global development and improvement of new energy electric vehicles, new energy electric vehicles will gradually replace fuel-consuming energy vehicles, so the output of new energy electric vehicles is gradually increasing, resulting in the scarcity of upstream materials for making batteries and the high price. The amount of waste batteries generated each year is also gradually increasing. Waste batteries contain a large amount of metal materials, so battery recycling is becoming more and more important.

[0003] However, it is always difficult to avoid environmental pollution during the recycling process of batteries. Therefore, the country has always had high requirements for battery recycling. The recycling and processing industry of used batteries is still in its initial development stage, and the existing waste battery processing is mainly for waste batteries that have no power.

[0004] For charged lithium batteries, there is electrolyte retained in the lithium batteries. Improper handling of the electrolyte can easily cause fire or explosion, seriously affecting safety. At the same time, electrolyte leakage can easily pollute the environment and seriously damage the ecological environment. Summary of the invention

[0005] The purpose of the present invention is to provide a recycling and processing device for waste charged lithium batteries to solve the problem in the prior art that improper electrolyte treatment during the recycling and processing of charged lithium batteries affects safety and damages the ecological environment.

[0006] In order to achieve the above-mentioned object, the present invention provides a recycling and processing device for waste charged lithium batteries, comprising an electrolyte processing unit and a material separation unit connected to each other, wherein the electrolyte processing unit comprises a crusher and a dryer connected to the crusher, wherein the crusher is further connected to a protective gas unit, and the dryer is connected to a first tail gas treatment system, wherein the first tail gas treatment system comprises a condensing device and an alkali solution spraying device;

[0007] The material separation unit comprises a first separation system, a second separation system and a third separation system with gradually decreasing air volume, the second separation system and the third separation system are both connected to the first separation system, the first separation system comprises a sorter, a magnetic separator connected to the sorter and a first negative pressure material extraction system connected to the magnetic separator, the sorter is connected to the dryer, and the magnetic separator is used to separate magnetic metal materials in the material;

[0008] The second separation system comprises a sorter, a second negative pressure pumping system and a membrane processing unit connected in sequence, the sorter is connected to the first negative pressure pumping system, and the membrane processing unit is connected to the second negative pressure pumping system;

[0009] The third separation system includes a third negative pressure pumping system and a screening unit connected to the third negative pressure pumping system, and the screening unit is used to separate non-magnetic metal materials in the material.

[0010] Preferably, the protective gas unit comprises a nitrogen generator, and the nitrogen generator is connected to the crusher.

[0011] Preferably, the dryer is a hollow blade dryer, and a pneumatic flap valve is further connected to the hollow blade dryer.

[0012] Preferably, two groups of the crushers and the dryers are arranged in parallel, and the two groups of dryers are connected to the first separation system.

[0013] Preferably, the first separation system further comprises an eddy current disperser, and the eddy current disperser is connected between the magnetic separator and the first negative pressure pumping system.

[0014] Preferably, the diaphragm processing unit comprises a screw conveyor, a spherical screen and a dry friction cleaning machine connected in sequence, the screw conveyor is connected to the second negative pressure extraction system, and the discharge end of the dry friction cleaning machine is connected to a screw type volume reducer via the screw conveyor.

[0015] Preferably, the diaphragm processing unit further includes a diaphragm dust removal system, which includes a pulse bag dust collector and a dust exhaust fan connected to the pulse bag dust collector, and the bag dust collector is connected to the first negative pressure extraction system.

[0016] Preferably, the screening unit comprises a storage bin, a vibrating screening machine connected to the storage bin, and a gravity sorting system connected to the vibrating screening machine, and a low-temperature cracking device is also connected between the storage bin and the first negative pressure pumping system.

[0017] Preferably, the low-temperature cracking device is also connected to a steam generator and a circulating water tank, the steam generator is also connected to a second tail gas treatment system, and the low-temperature cracking device is connected to the second tail gas treatment system.

[0018] Preferably, there are two groups of the vibrating screening machines, and a fine crusher is connected between the two groups of the vibrating screening machines.

[0019] Compared with the prior art, the recycling and processing device for waste charged lithium batteries in the embodiment of the present invention has the following beneficial effects: an electrolyte processing unit is arranged on the front side of the material separation unit, and the electrolyte processing unit is formed by a crusher and a dryer. When processing the charged lithium battery, the charged lithium battery is first crushed by the crusher. Since a protective gas unit is arranged on the crusher, the protective gas reduces the oxygen content inside the crusher. At the same time, the protective gas can also be used to take away the heat of the lithium battery, so that it does not have the conditions for fire or explosion, and isolates the chemical reaction and friction heat generation effects during the crushing process, ensuring the safety of lithium battery processing. At the same time, the dryer is used to evaporate and volatilize the electrolyte, and a liquid electrolyte can be obtained after condensation by the condensation device of the first tail gas treatment system, and the uncondensed gas can be processed by the alkali solution spraying device to protect the safety of the ecological environment. The crushed lithium batteries are screened and separated by the material separation unit to complete the recycling of various materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a waste charged lithium battery recovery and processing device of the present invention;

[0021] Figure 2 yes Figure 1 A top view of a device for recycling and processing waste charged lithium batteries;

[0022] Figure 3 yes Figure 1 A schematic structural diagram of a diaphragm processing unit of a waste charged lithium battery recovery and processing device;

[0023] In the figure, 1, belt conveyor; 2, transition bin; 3, crusher; 4, screw conveyor; 5, dryer; 6, pneumatic flap valve; 7, scraper conveyor; 8, fan off; 9, sorter; 10, belt conveyor; 11, magnetic separator; 12, eddy current bulk material machine; 13, first negative pressure extraction system; 14, sorter; 15, second negative pressure extraction system; 16, screw conveyor; 17, roller screen; 18, dry friction cleaning machine; 19, screw conveyor; 20, screw type volume reducer; 21, scraper conveyor; 22, scraper conveyor; 23, third negative pressure extraction system; 24, scraper conveyor; 25, fan off; 26, low temperature cracking Decomposition device; 27. Buried plate conveyor; 28. Storage bin; 29. ​​Turn off fan; 30. Buried plate conveyor; 31. Vibrating screen; 32. Turn off fan; 33. Fine crusher; 34. Vibrating screen; 35. Buried plate conveyor; 36. Turn off fan; 37. Gravity sorting system; 38. Pulse bag dust collector; 39. Dust exhaust fan; 40. Cyclone collecting hopper; 41. Pulse bag dust collector; 42. Fan; 43. Circulating water tank; 44. Fireproof and soundproof board room; 45. Control system; 46. Nitrogen generator; 47. First tail gas treatment system; 48. Second tail gas treatment system; 49. Condensation device; 50. Alkali solution spraying device. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] A preferred embodiment of a waste charged lithium battery recycling and processing device of the present invention is as follows Figures 1 to 3 As shown, the recycling and processing device for waste charged lithium batteries includes an electrolyte processing unit and a material separation unit which are interconnected. The electrolyte processing unit is used to process the electrolyte of the charged lithium battery to ensure the safety of lithium battery recycling and processing. The material separation unit is used to separately screen the materials in the lithium battery, and the materials include iron, tabs, diaphragms, copper, aluminum, black powder, etc.

[0026] The electrolyte treatment unit includes a crusher 3 and a dryer 5 connected to the crusher 3. The crusher 3 is also connected to a protective gas unit. The dryer 5 is connected to a first tail gas treatment system 47. The first tail gas treatment system 47 includes a condensing device 49 and an alkali solution spraying device 50. The crusher 3 can crush the lithium battery. The protective gas unit transports protective gas into the crusher 3. The protective gas can reduce the oxygen content inside the crusher 3. At the same time, the protective gas can also be used to take away the heat of the lithium battery, so that it does not have the conditions for fire or explosion, and isolates the chemical reaction and friction heat generation effect in the crushing process, ensuring the safety of lithium battery processing. At the same time, aluminum will not oxidize under the protective gas.

[0027] In this embodiment, the crusher 3 is a heavy crusher, which is connected to the dryer 5 via a screw conveyor 4, which conveys the crushed lithium batteries to the dryer 5. The charged lithium batteries can be square, soft-pack batteries and cylindrical batteries. The feed port of the crusher 3 is connected to a conveyor belt and a transition bin 2, and the conveyor belt conveys the used charged lithium batteries to the transition bin 2. The charged lithium batteries in the transition bin 2 enter the crusher 3 after buffering.

[0028] The dryer 5 can evaporate and volatilize the electrolyte, and the evaporated and volatilized electrolyte enters the first tail gas treatment system 47. The condensation device 49 of the first tail gas treatment system 47 can obtain liquid electrolyte after condensation, and the uncondensed gas can be treated by the alkaline solution spraying device 50 to protect the ecological environment safety.

[0029] In this embodiment, the dryer 5 is a hollow blade dryer 5, and a pneumatic flap valve 6 is connected to the hollow blade dryer 5. The pneumatic flap valve 6 is used to switch the output end of the dryer 5 so that the dried battery fragments enter the subsequent material separation unit.

[0030] The material separation unit includes a first separation system, a second separation system and a third separation system with gradually decreasing air volume, and the second separation system and the third separation system are connected to the first separation system. The air volume of the first separation system, the second separation system and the third separation system gradually decreases, and objects of different qualities can be separated in turn, thereby separating different materials.

[0031] The first separation system includes a sorter 9, a magnetic separator 11 connected to the sorter 9, and a first negative pressure extraction system 13 connected to the magnetic separator 11. The sorter 9 is connected to the dryer 5 through the scraper conveyor 7. The magnetic separator 11 is used to separate magnetic metal materials in the material.

[0032] The first negative pressure extraction system 13 provides power for the movement of the debris, so that the debris passes through the sorter 9, and can also control the air volume of the first separation system. The sorter 9 is connected to the dryer 5 through the buried scraper conveyor 7, and the discharge end of the buried scraper conveyor 7 is arranged with a related fan 8. The sorter 9 can sort the crushed lithium battery waste. In this embodiment, the sorter 9 is a Z-shaped sorter.

[0033] The separator 9 of the independent first separation system can separate the items with the largest mass in the battery debris, including aluminum, iron shells and tabs, etc., to prevent excessive wear of the subsequent crusher 3 screen cutter body, which is beneficial to crushing and air separation. The magnetic separator 11 can absorb magnetic iron materials through magnetism and further classify and process the heavier debris. The magnetic separator 11 is connected to a belt conveyor 10, which can transport the iron to a designated storage location.

[0034] The second separation system and the third separation system are both connected to the first separation system. The second separation system and the first separation system can screen different materials respectively to improve separation efficiency.

[0035] The second separation system includes a sorter 14, a second negative pressure pumping system 15 and a membrane processing unit connected in sequence, the sorter 14 is connected to the first negative pressure pumping system 13, and the membrane processing unit is connected to the second negative pressure pumping system 15. Since the membrane is heavier than copper, aluminum and black powder, it can be separated first by the second separation system.

[0036] The sorter 14 is a Z-shaped sorter, which can further screen the material separated by the first separation system to separate the membrane in the material. The membrane processing unit can further process the separated membrane to meet the conditions for packaging and transportation. The second negative pressure extraction system 15 can provide power for the transportation of the membrane in the second separation system and adjust the air volume of the first separation system.

[0037] The third separation system includes a third negative pressure pumping system 23 and a screening unit connected to the third negative pressure pumping system 23, and the screening unit is used to separate non-magnetic metal materials in the material. The third negative pressure pumping system 23 is connected to the first negative pressure pumping system 13 through an embedded scraper conveyor 24 to transport the material.

[0038] The screening unit can select the existing copper, aluminum and black powder screening devices, and its purpose is to screen and recover the heavy materials and the debris behind the diaphragm. The third negative pressure extraction system 23 can provide power for the transportation of the debris and adjust the air volume of the third separation system.

[0039] Preferably, the protective gas unit includes a nitrogen generator 46, which is connected to the crusher 3. The nitrogen generator 46 can generate nitrogen operating protective gas, and the nitrogen generator 46 can also generate liquid nitrogen. The high-speed flow of liquid nitrogen can handle the crushing of the entire lithium battery. During the crushing process, liquid nitrogen is filled into the box inside the crusher 3 to reduce the oxygen content inside the box, and also reduce the heat generated by the box when the lithium battery is shredded, so there is no fire or explosion condition. Therefore, the entire square, soft-pack battery and cylindrical battery are shredded by low temperature and inert gas to isolate the chemical reaction and friction heat generated during the crushing process.

[0040] Preferably, the dryer 5 is a hollow blade dryer, and the hollow blade dryer is also connected to a pneumatic flap valve 6. The hollow blade dryer 5 uses high-pressure steam as a heat source and has a frequency conversion function, and the pneumatic flap valve 6 can control the on and off of the dryer 5, so that the dried debris is discharged from the dryer 5 to the material separation unit.

[0041] The electrolyte is treated by drying. The electrolyte contained in the battery fragments after stirring and shredding is dried in the form of high-pressure steam. The drying is convenient, and it is also convenient to use high-pressure steam to carry out the evaporated and volatilized electrolyte to the first exhaust gas treatment system 47.

[0042] Preferably, two groups of crushers 3 and dryers 5 are arranged in parallel, and the two groups of dryers 5 are connected to the first separation system.

[0043] The crusher 3 and the dryer 5 are connected one by one, and two groups of crushers 3 and two groups of dryers 5 are arranged in parallel. That is, each electrolyte processing unit contains two parallel processing lines, and the two processing lines can reduce the number of charged lithium batteries processed by each group of crushers 3 and dryers 5. Since it is dangerous to crush and dry charged lithium batteries, it is more stable and safe to reduce the number of processing, and the time and temperature of material drying can be guaranteed.

[0044] Preferably, the first separation system further includes an eddy current bulker 12 , which is connected between the magnetic separator 11 and the first negative pressure extraction system 13 .

[0045] After the magnetic separator 11 screens out the iron material, the first separation system separates the heavier material, which can prevent the subsequent crusher screen cutter from excessive wear and tear, which is beneficial to crushing and air separation. The remaining materials enter the eddy current third material and the eddy current bulker 12 can knead and peel the materials, which is beneficial to the subsequent second separation system to air separate the diaphragm.

[0046] Preferably, the diaphragm processing unit includes a screw conveyor 16, a spherical screen 17 and a dry friction cleaning machine 18 connected in sequence, the screw conveyor 16 is connected to the second negative pressure extraction system 15, and the discharge end of the dry friction cleaning machine 18 is connected to a screw type volume reducer 20 through a screw conveyor 19.

[0047] The screw conveyor 16 is used to convey materials containing the diaphragm, and the round screen 17 can screen out materials other than the diaphragm to remove impurities from the diaphragm. The bottom of the round screen 17 is also connected to two buried scraper conveyors, one buried scraper conveyor 21 is arranged horizontally, and the other buried scraper conveyor 22 is arranged obliquely. The buried scraper conveyor 22 arranged obliquely conveys the remaining materials to the sorter 14, so that the third separation system can continue to classify and screen the materials, thereby improving the separation effect of the materials.

[0048] The dry friction cleaning machine 18 can remove the powder from the diaphragm, and then squeeze the material into a mass through the squeezer, and then convey it to the screw type volume reducer 20 through the screw conveyor 19 to package the massed material for easy packaging and transportation.

[0049] Preferably, the diaphragm processing unit further includes a diaphragm dust removal system, which includes a pulse bag dust collector 38 and a dust exhaust fan 39 connected to the pulse bag dust collector 38 , and the pulse bag dust collector 38 is connected to the first negative pressure extraction system 13 .

[0050] The dust exhaust fan 39 can form a negative pressure to draw the waste gas in the diaphragm processing unit into the bag dust collector. The bag dust collector filters the waste gas generated by the processing diaphragm to avoid polluting the ecological environment.

[0051] Preferably, the screening unit includes a storage bin 28, a vibration screening machine 31 connected to the storage bin 28, and a gravity sorting system 37 connected to the vibration screening machine 34. A low-temperature cracking device 26 is also connected between the storage bin 28 and the first negative pressure extraction system 13.

[0052] The storage bin 28 and the vibrating screening machine 31 are connected via an embedded plate conveyor 30, the storage bin 28 and the low-temperature cracking device 26 are connected via an embedded plate conveyor 27, the low-temperature cracking device 26 and the first negative pressure extraction system 13 are connected via an embedded scraper conveyor 24, a related fan 25 is arranged at the input end of the low-temperature cracking device 26, and a related fan 29 is arranged at the output end of the storage bin 28, and the material conveying rate can be controlled by turning off the fans 25 and 29.

[0053] The low temperature cracking device 26 can perform low temperature cracking treatment on all materials to be sorted. Under the nitrogen atmosphere, the temperature of the materials is easy to control and aluminum will not be oxidized. The storage bin 28 is used to temporarily store the materials to be screened. The vibration screening machine 31 can disperse the materials by vibration and select the black powder by the vibration screen. The gravity sorting system 37 can select copper and aluminum by air by gravity.

[0054] Preferably, the low-temperature cracking device 26 is also connected to a steam generator and a circulating water tank 43 , the steam generator is also connected to a second tail gas treatment system 48 , and the low-temperature cracking device 26 is connected to the second tail gas treatment system 48 .

[0055] The circulating water tank 43 can cool the main bearings, and the steam generator can reasonably utilize the energy generated by the low-temperature cracking device 26 to save energy. The low-temperature cracking device and the steam generator are both connected to the second tail gas treatment system, and the exhausted exhaust gas can be purified by the second tail gas treatment system 48 to prevent damage to the ecological environment.

[0056] The second exhaust gas treatment system 48 includes a cyclone hopper 40, a pulse bag dust collector 41 and a fan 42 connected in sequence. The cyclone hopper 40 is used to collect exhaust gas, the pulse bag dust collector 41 is used to filter the exhaust gas to eliminate polluted gas, and the fan 42 is used to generate negative pressure to provide power for gas flow.

[0057] Preferably, there are two groups of vibrating screens, and a fine crusher 33 is connected between the two groups of vibrating screens.

[0058] The inlet of the fine crusher 33 is provided with a fan 32, and the fine crusher 33 is arranged between the vibrating screen 31 and the vibrating screen 34. The fine crusher 33 can crush the scattered materials, and through the vibration, crushing, and re-vibration, it can fully ensure the stripping of the positive electrode powder and improve the recovery rate of the black powder. The black powder can be selected by the vibrating screen 34. The vibrating screen 34 is connected to the gravity sorting system 37 through an embedded plate conveyor 35, and the inlet of the gravity sorting system is provided with a fan 36 to assist in unloading.

[0059] Preferably, the recycling and processing device for waste charged lithium batteries also includes a control system 45 and a fireproof and soundproof board room 44. The diaphragm processing units are arranged in the fireproof and soundproof board room 44. The fireproof and soundproof board room 44 is used to reduce noise, prevent fire, and improve the safety of diaphragm processing. The control system 45 controls the normal operation of the entire recycling and processing device, has a high degree of automation, and can be basically used for a long time after basic debugging.

[0060] The working process of the waste charged lithium battery recycling device of the present invention is as follows:

[0061] When the charged lithium batteries are recycled, the control system 45 controls the operation of the entire recycling device. The charged lithium batteries are transported by the belt conveyor 1 to the transition bin 2 for temporary storage. The lithium batteries in the transition bin 2 fall into two crushers 3, and the crushers 3 crush the lithium batteries. At the same time, the nitrogen production device 46 inputs liquid nitrogen into the crusher 3 to process the crushing of the entire lithium battery, reduce the oxygen content in the crusher 3, and at the same time reduce the heat generated by the shredded lithium batteries, isolating the chemical reaction and friction heat generated during the crushing process.

[0062] The material crushed by the crusher 3 is conveyed to the dryer 5 through the screw conveyor 4. The dryer 5 uses high-pressure steam to dry the electrolyte in the material, so that the electrolyte evaporates and volatilizes; the volatilized electrolyte is condensed by the condensing device 49 of the first tail gas treatment system 47, and the water vapor is separated to obtain a liquid electrolyte. The uncondensed gas is sprayed with alkali liquid through the alkali liquid spraying device 50 to prevent the electrolyte from polluting the ecological environment after discharge.

[0063] The material after the electrolyte is eliminated is transported to the sorter 9 by the scraper conveyor 7. The sorter 9 screens the material under the action of the air volume of the first negative pressure extraction system 13, so that the iron shell, pole ear, large aluminum and other materials with the largest mass are separated first, to prevent excessive wear of the subsequent crusher screen blade, which is beneficial to crushing and air separation. The screened material is transported to the magnetic separator 11, and the iron material is screened out by magnetism. The iron material is transported to the designated location by the belt conveyor 10. Other materials pass through the eddy current bulker 12, which rubs and peels the materials, which is beneficial to the diaphragm air separation.

[0064] Separation is performed under the action of the air volume of the second negative pressure pumping system 15 and the third negative pressure pumping system 23. The second negative pressure pumping system 15 separates the diaphragm, and the third negative pressure pumping system 23 separates copper, aluminum and black powder.

[0065] The material containing the diaphragm enters the sorter 14 under the action of the second negative pressure extraction system 15. The sorter 14 screens out the diaphragm and sends it to the round screen 17 through the screw conveyor 16. The round screen 17 can screen out materials except the diaphragm. The remaining materials are returned to the sorter 14 through the buried scraper conveyor 21 and the buried scraper conveyor 22 for subsequent sorting.

[0066] The membrane screened by the tumble screen 17 enters the dry friction cleaning machine 18, which removes the powder from the membrane, and then squeezes it into a mass material through an extruder, and then is transported to the screw type volume reducer 20 by the screw conveyor 19, which is convenient for bulk packaging and transportation.

[0067] The waste gas discharged from the diaphragm processing unit is sucked into the pulse bag dust collector 38 under the action of the dust exhaust fan 39, and the pulse bag dust collector 38 cleans the waste gas to prevent pollution of the ecological environment.

[0068] The third negative pressure extraction system 23 separates the materials containing copper, aluminum and black powder, and conveys them to the low-temperature cracking device 26 by the buried scraper conveyor 24. The air shut-off fan 32 at the entrance of the low-temperature cracking device 26 is turned on to allow the materials to enter. The temperature of the materials is easy to control under the nitrogen atmosphere, and aluminum will not be oxidized.

[0069] The material cracked by the low-temperature cracking device 26 is transported to the storage bin 28 by the buried scraper conveyor 24. The fan 29 at the bottom of the storage bin 28 is turned on. The material is transported to the vibration screening machine 31, the fine crusher 33 and the vibration screening machine 34 in sequence by the buried plate conveyor 30. The vibration screening machine 31 vibrates and disperses the material. At the same time, the fine crusher 33 can fully ensure the stripping of the positive electrode powder and improve the recovery rate of the black powder. The black powder can be selected by the vibration screening machine 34. The material after vibration screening is transported to the gravity sorting system 37 by the buried plate conveyor 35. The gravity sorting system 37 separates copper and aluminum by gravity air separation.

[0070] The exhaust gas from the low-temperature cracking device 26 and the third separation system is transported to the cyclone collection hopper 40 and the pulse bag dust collector 41 in the second tail gas treatment system 48 by the action of the fan 42, and the exhaust gas is dust-removed to prevent pollution of the ecological environment.

[0071] In summary, the embodiment of the present invention provides a recycling and processing device for waste charged lithium batteries, wherein an electrolyte processing unit is arranged on the front side of the material separation unit, and the electrolyte processing unit is formed by a crusher and a dryer. When processing the charged lithium battery, the charged lithium battery is first crushed by the crusher. Since a protective gas unit is arranged on the crusher, the protective gas reduces the oxygen content inside the crusher. At the same time, the protective gas can also be used to take away the heat of the lithium battery, so that it does not have the conditions for fire or explosion, and isolates the chemical reaction and friction heat generation effects during the crushing process to ensure the safety of lithium battery processing. At the same time, the dryer is used to evaporate and volatilize the electrolyte. Liquid electrolyte can be obtained after condensation by the condensation device of the first tail gas treatment system, and the uncondensed gas can be treated by the alkali solution spraying device to protect the safety of the ecological environment. The crushed lithium batteries are screened and separated by the material separation unit to complete the recovery of various materials. After repeated negative pressure pumping, the diaphragm is separated from the material to better extract the content of various materials.

[0072] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A recycling and processing device for waste charged lithium batteries, characterized in that: It includes an electrolyte treatment unit and a material separation unit connected to each other, the electrolyte treatment unit includes a crusher and a dryer connected to the crusher, the crusher is also connected to a protective gas unit, the dryer is connected to a first tail gas treatment system, and the first tail gas treatment system includes a condensing device and an alkali solution spraying device; The material separation unit comprises a first separation system, a second separation system and a third separation system with gradually decreasing air volume, the second separation system and the third separation system are both connected to the first separation system, the first separation system comprises a sorter, a magnetic separator connected to the sorter and a first negative pressure material extraction system connected to the magnetic separator, the sorter is connected to the dryer, and the magnetic separator is used to separate magnetic metal materials in the material; The second separation system comprises a sorter, a second negative pressure pumping system and a membrane processing unit connected in sequence, the sorter is connected to the first negative pressure pumping system, and the membrane processing unit is connected to the second negative pressure pumping system; The third separation system includes a third negative pressure pumping system and a screening unit connected to the third negative pressure pumping system, and the screening unit is used to separate non-magnetic metal materials in the material.

2. The recycling and processing device for waste charged lithium batteries according to claim 1 is characterized in that: The protective gas unit comprises a nitrogen generator, and the nitrogen generator is connected to the crusher.

3. The recycling and processing device for waste charged lithium batteries according to claim 2 is characterized in that: The dryer is a hollow blade dryer, and a pneumatic flap valve is also connected to the hollow blade dryer.

4. The recycling and processing device for waste charged lithium batteries according to any one of claims 1 to 3, characterized in that: The crusher and the dryer are arranged in two groups in parallel, and the two groups of dryers are connected to the first separation system.

5. The recycling and processing device for waste charged lithium batteries according to any one of claims 1 to 3, characterized in that: The first separation system further comprises an eddy current disperser, and the eddy current disperser is connected between the magnetic separator and the first negative pressure pumping system.

6. The recycling and processing device for waste charged lithium batteries according to any one of claims 1 to 3, characterized in that: The diaphragm processing unit comprises a screw conveyor, a spherical screen and a dry friction cleaning machine which are connected in sequence. The screw conveyor is connected to the second negative pressure extraction system. The discharge end of the dry friction cleaning machine is connected to a screw type volume reducer via the screw conveyor.

7. The recycling and processing device for waste charged lithium batteries according to claim 6 is characterized in that: The diaphragm processing unit also includes a diaphragm dust removal system, which includes a pulse bag dust collector and a dust exhaust fan connected to the pulse bag dust collector, and the bag dust collector is connected to the first negative pressure extraction system.

8. The recycling and processing device for waste charged lithium batteries according to any one of claims 1 to 3, characterized in that: The screening unit includes a storage bin, a vibrating screening machine connected to the storage bin, and a gravity sorting system connected to the vibrating screening machine. A low-temperature cracking device is also connected between the storage bin and the first negative pressure pumping system.

9. The recycling and processing device for waste charged lithium batteries according to claim 8, characterized in that: The low-temperature cracking device is also connected to a steam generator and a circulating water tank, the steam generator is also connected to a second tail gas treatment system, and the low-temperature cracking device is connected to the second tail gas treatment system.

10. The recycling and processing device for waste charged lithium batteries according to claim 8, characterized in that: There are two groups of vibrating screening machines, and a fine crusher is connected between the two groups of vibrating screening machines.

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