A complete set of equipment for discharging, crushing and sorting waste lithium batteries and its use method

Abstract

The present invention provides a complete set of equipment for discharging, crushing and sorting waste lithium batteries and a method for using the equipment, and relates to the technical field of waste lithium battery processing. The complete set of equipment for discharging, crushing and sorting waste lithium batteries comprises a primary crusher and a pulse dust collector, wherein the bottom discharge port of the primary crusher is fixedly connected to the top feed port of the secondary crusher, a first screw conveyor is arranged at the rear side of the secondary crusher, a drying drum screen is arranged at the discharge port of the first screw conveyor, a vibrating screen is arranged at the rear discharge port of the drying drum screen, and a belt magnetic separator is arranged at the rear side of the vibrating screen. Through the coordinated use of the primary crusher, the secondary crusher and the tertiary crusher, multiple crushing of waste lithium batteries is achieved, and the crushing effect is improved. The screening function is achieved through the vibrating screen, the Z-type sorter, the drum screen, the airflow sorter, the first rotary screen and the second rotary screen, and the gas purification function is achieved through the activated carbon purifier.

Description

Technical Field

[0001] The invention relates to the technical field of waste lithium battery processing, and in particular to a waste lithium battery discharge, crushing and sorting complete set of equipment and a use method thereof. Background Art

[0002] With the country's vigorous promotion of electric vehicles, a large number of power lithium batteries will face the problem of being scrapped in the future. According to the China Automotive Technology Research and Development Center, the recycling rate of scrapped batteries in my country is less than 2%. Waste lithium-ion batteries contain a large amount of usable resources, such as valuable metals such as aluminum and copper, as well as graphite, positive electrode materials, etc. Power batteries also contain heavy metal materials and electrolytes such as nickel, cobalt, manganese, and lithium. Once waste lithium batteries cannot be effectively handled, it will not only cause waste of resources, but also cause serious pollution to the environment.

[0003] At present, the existing waste lithium battery processing equipment has certain shortcomings when processing waste lithium batteries. First, the crushing effect when processing waste lithium batteries is insufficient, resulting in a reduction in the subsequent screening effect of the waste lithium batteries. Second, the treatment effect of the dust generated in the process of processing waste lithium batteries is poor, and direct discharge into the air is prone to pollution problems. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the present invention provides a set of equipment for discharging, crushing and sorting waste lithium batteries and a method for using the same, which solves the problem that poor crushing effect of waste lithium batteries leads to reduced screening effect of waste lithium batteries and poor treatment effect of generated dust, which is prone to pollution when directly discharged into the air.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a complete set of equipment for discharging, crushing and sorting waste lithium batteries, comprising a primary crusher and a pulse dust collector, the bottom discharge port of the primary crusher is fixedly connected to the top feed port of the secondary crusher, a first screw conveyor is arranged on the rear side of the secondary crusher, a drying drum screen is arranged at the discharge port of the first screw conveyor, a vibrating screen is arranged at the rear discharge port of the drying drum screen, a belt magnetic separator is arranged on the rear side of the vibrating screen, the discharge port of the belt magnetic separator is fixedly connected to the feed port of the belt conveyor, the left end discharge port of the belt conveyor is fixedly connected to the feed port of a Z-type separator, a second screw conveyor is arranged on the left side of the Z-type separator, and the left lower end of the second screw conveyor is provided with a second screw conveyor. A three-stage crusher is provided, and the bottom discharge port of the three-stage crusher is fixedly connected to the feed port of the third screw conveyor, a drum screen is provided on the left side of the third screw conveyor, and a fourth screw conveyor is provided on the front side of the drum screen, and the discharge port of the fourth screw conveyor is fixedly connected to the top feed port of the airflow classifier, and the bottom feed port of the pulse dust collector is respectively fixedly connected to one end of the first conveying pipe and the second conveying pipe, the other end of the first conveying pipe is fixedly connected to the first cyclone dust collector, and the other end of the second conveying pipe is fixedly connected to the second cyclone dust collector, the top exhaust port of the pulse dust collector is fixedly connected to one end of the discharge pipe, and the other end of the discharge pipe is fixedly connected to a fan, and the bottom of the fan is fixedly connected to the top of the activated carbon purifier.

[0008] Preferably, a stainless steel mesh belt electric heating variable frequency conveyor is arranged on the left side of the first-stage crusher, and the discharge port of the stainless steel mesh belt electric heating variable frequency conveyor is connected to the top feed port of the first-stage crusher. A liquid nitrogen quick freezer is arranged on the left side of the stainless steel mesh belt electric heating variable frequency conveyor, and the right discharge port of the liquid nitrogen quick freezer is connected to the feed port of the stainless steel mesh belt electric heating variable frequency conveyor.

[0009] Preferably, the feed port of the first screw conveyor is fixedly connected to the bottom discharge port of the secondary crusher, and the discharge port of the first screw conveyor is fixedly connected to the feed port of the drying drum screen.

[0010] Preferably, the feed port of the vibrating screen is connected to the discharge port of the drying drum screen, the discharge port of the vibrating screen is connected to the feed port of the belt magnetic separator, and a collecting box is provided at the bottom of the vibrating screen.

[0011] Preferably, the right feed port of the Z-type separator is fixedly connected to the discharge port of the belt conveyor, and the discharge port of the Z-type separator is fixedly connected to the feed port of the second screw conveyor.

[0012] Preferably, the primary crusher, the secondary crusher, the drying drum screen and the Z-type classifier are all connected to the feed port of the first cyclone dust collector through a pipeline, and the bottom of the first cyclone dust collector is fixedly connected with a first rotating screen.

[0013] Preferably, the three-stage crusher, drum screen and airflow separator are all connected to the feed port of the second cyclone dust collector through a pipeline, and the bottom discharge port of the second cyclone dust collector is fixedly connected to the second rotary screen.

[0014] Preferably, a method for using a complete set of equipment for discharging, crushing and sorting waste lithium batteries comprises the following steps:

[0015] S1. First, the waste lithium batteries are put into the feed port of the liquid nitrogen quick-freezing machine. The waste lithium batteries are frozen and discharged in the liquid nitrogen quick-freezing machine. The discharged waste lithium batteries enter the stainless steel mesh belt electric heating variable frequency conveyor through the discharge port of the liquid nitrogen quick-freezing machine. The waste lithium batteries are heated on the stainless steel mesh belt electric heating variable frequency conveyor, thereby realizing the functions of thawing and conveying, so that the waste lithium batteries enter the primary crusher;

[0016] S2. The waste lithium batteries enter the primary crusher for the first crushing, and then enter the secondary crusher for the second crushing, which improves the crushing effect of the waste lithium batteries. The dust and other substances generated in the primary crusher and the secondary crusher enter the first cyclone dust collector through the pipeline, achieving the dust collection effect and facilitating subsequent cleaning;

[0017] S3, the crushed material enters the drying drum screen through the first screw conveyor to achieve the purpose of drying and screening, so that the electrolyte enters the collecting box, the dried material is screened by the vibrating screen, the solid material is magnetically separated by the belt magnetic separator, so that the iron material is screened out, and the screening function is achieved. The magnetically separated material enters the Z-type separator through the belt conveyor for re-sorting, and the dust and other substances in the drying drum screen and the Z-type separator also enter the first cyclone dust collector through the pipeline, and the black powder and diaphragm in the first cyclone dust collector enter the first rotary screen for rotary screening, so that the black powder and the diaphragm are separated, and the dust gas in the first cyclone dust collector enters the pulse dust collector through the first conveying pipe for dust removal;

[0018] The remaining materials after sorting by the S4 and Z-type sorters are sent to the three-stage crusher through the second screw conveyor for the third crushing, which further improves the crushing effect. The crushed materials are sent to the drum screen through the third screw conveyor for further screening. The remaining materials are sent to the airflow sorter through the fourth screw conveyor for the final sorting, so that the copper and aluminum powders and the diaphragm are separated. The dust and debris in the three-stage crusher, the drum screen and the airflow sorter are sent to the second cyclone dust collector through the pipeline. The black powder and the diaphragm in the second cyclone dust collector are sent to the second rotary screen for rotary screening, so that the black powder and the diaphragm are separated. The dust gas in the second cyclone dust collector is sent to the pulse dust collector through the second conveying pipe for dust removal.

[0019] S5. The exhaust gas in the pulse dust collector enters the activated carbon purifier for purification through the discharge pipe and the fan, and the purified gas is discharged. In summary, the purpose of crushing and sorting waste lithium batteries can be achieved.

[0020] (III) Beneficial effects

[0021] The present invention provides a complete set of equipment for discharging, crushing and sorting waste lithium batteries and a method for using the same. It has the following beneficial effects:

[0022] 1. The present invention freezes the waste lithium battery by a liquid nitrogen quick freezer to achieve rapid discharge, avoid potential safety hazards in the subsequent crushing process, and improve the safety of crushing. The coordinated use of a primary crusher, a secondary crusher, and a tertiary crusher can achieve multiple crushing of the waste lithium battery, which is beneficial to improving the crushing effect. The drying drum screen can separate the electrolyte and dry the solid material, thereby improving the subsequent screening effect. The screening function is achieved by a vibrating screen, a Z-type sorting machine, a drum screen, an airflow sorting machine, a first rotary screen, and a second rotary screen. The black powder and diaphragm in the waste lithium battery can be separated and recovered, which can achieve the recycling of resources and the centralized treatment of resources that cannot be recycled, thereby avoiding the problem of environmental pollution caused by direct discarding, and improving the treatment effect of the waste lithium battery.

[0023] 2. The present invention can collect dust and other materials in the primary crusher, the secondary crusher, the drying drum screen and the Z-type classifier through the first cyclone dust collector, and the second cyclone dust collector can collect dust and other materials in the tertiary crusher, the drum screen and the airflow classifier. The pulse dust collector can filter and separate the gas in the first cyclone dust collector and the second cyclone dust collector, so that dust particles and the like are filtered out to avoid direct discharge and pollution to the environment. At the same time, the pulse dust collector discharges the gas into the activated carbon purifier through the discharge pipe and the fan for purification, ensuring that the gas discharged into the air is pollution-free, thereby achieving the function of environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of the present invention;

[0025] Figure 2 It is a right side view of the present invention;

[0026] Figure 3 It is a rear view of the present invention;

[0027] Figure 4 for Figure 3 A in the enlarged view;

[0028] Figure 5 It is a top view of the present invention.

[0029] Among them, 1. Liquid nitrogen quick freezing machine; 2. Stainless steel mesh belt electric heating frequency conversion conveyor; 3. Primary crusher; 4. Secondary crusher; 5. First screw conveyor; 6. Drying drum screen; 7. Vibrating screen; 8. Belt magnetic separator; 9. Belt conveyor; 10. Z-type separator; 11. Second screw conveyor; 12. Third-stage crusher; 13. Third screw conveyor; 14. Drum screen; 15. Fourth screw conveyor; 16. Air flow separator; 17. First cyclone dust collector; 18. First rotary screen; 19. First conveying pipe; 20. Second cyclone dust collector; 21. Second rotary screen; 22. Second conveying pipe; 23. Pulse dust collector; 24. Discharge pipe; 25. Fan; 26. Activated carbon purifier. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Example:

[0032] like Figure 1-5As shown, the embodiment of the present invention provides a complete set of equipment for discharging, crushing and sorting waste lithium batteries, including a primary crusher 3 and a pulse dust collector 23, the bottom discharge port of the primary crusher 3 is fixedly connected to the top feed port of the secondary crusher 4, the rear side of the secondary crusher 4 is provided with a first screw conveyor 5, the discharge port of the first screw conveyor 5 is provided with a drying drum screen 6, the rear discharge port of the drying drum screen 6 is provided with a vibrating screen 7, the rear side of the vibrating screen 7 is provided with a belt magnetic separator 8, the discharge port of the belt magnetic separator 8 is fixedly connected to the feed port of the belt conveyor 9, the left end discharge port of the belt conveyor 9 is fixedly connected to the feed port of the Z-type separator 10, the left side of the Z-type separator 10 is provided with a second screw conveyor 11, the left side of the second screw conveyor 11 A three-stage crusher 12 is arranged at the lower side, the bottom discharge port of the three-stage crusher 12 is fixedly connected to the feed port of the third screw conveyor 13, a drum screen 14 is arranged on the left side of the third screw conveyor 13, a fourth screw conveyor 15 is arranged on the front side of the drum screen 14, the discharge port of the fourth screw conveyor 15 is fixedly connected to the top feed port of the airflow classifier 16, the bottom feed port of the pulse dust collector 23 is respectively fixedly connected to one end of the first conveying pipe 19 and the second conveying pipe 22, the other end of the first conveying pipe 19 is fixedly connected to the first cyclone dust collector 17, the other end of the second conveying pipe 22 is fixedly connected to the second cyclone dust collector 20, the top exhaust port of the pulse dust collector 23 is fixedly connected to one end of the discharge pipe 24, and the other end of the discharge pipe 24 is fixedly connected to the discharge pipe 24. The end of the blower 25 is fixedly connected, and the bottom of the blower 25 is fixedly connected to the top of the activated carbon purifier 26. The waste lithium batteries are frozen by the liquid nitrogen quick freezer 1 to achieve rapid discharge, avoid potential safety hazards in the subsequent crushing process, and improve the safety of crushing. The coordinated use of the primary crusher 3, the secondary crusher 4 and the tertiary crusher 12 can achieve multiple crushing of the waste lithium batteries, which is beneficial to improving the crushing effect. The electrolyte can be separated and the solid material can be dried by the drying drum screen 6, which improves the subsequent screening effect. The screening function is achieved by the vibrating screen 7, the Z-type sorting machine 10, the drum screen 14, the airflow sorting machine 16, the first rotary screen 18 and the second rotary screen 21, etc., and the waste The black powder and diaphragm in the old lithium battery can be separated and recycled, which can realize the recycling of resources and the centralized treatment of non-recyclable resources, avoiding the problem of environmental pollution caused by direct discarding, and improving the treatment effect of waste lithium batteries. The first cyclone dust collector 17 can collect dust and other materials in the primary crusher 3, the secondary crusher 4, the drying drum screen 6 and the Z-type separator 10. The second cyclone dust collector 20 can collect dust and other materials in the tertiary crusher 12, the drum screen 14 and the airflow separator 16. The pulse dust collector 23 can filter and separate the gas in the first cyclone dust collector 17 and the second cyclone dust collector 20, so that dust particles are filtered out, avoiding direct discharge and pollution to the environment.At the same time, the pulse dust collector 23 discharges the gas into the activated carbon purifier 26 through the discharge pipe 24 and the fan 25 for purification, ensuring that the gas discharged into the air is pollution-free and realizing the function of environmental protection.

[0033] A stainless steel mesh belt electric heating frequency conversion conveyor 2 is arranged on the left side of the first-stage crusher 3, and the discharge port of the stainless steel mesh belt electric heating frequency conversion conveyor 2 is connected to the top feed port of the first-stage crusher 3. A liquid nitrogen quick freezing machine 1 is arranged on the left side of the stainless steel mesh belt electric heating frequency conversion conveyor 2, and the right discharge port of the liquid nitrogen quick freezing machine 1 is connected to the feed port of the stainless steel mesh belt electric heating frequency conversion conveyor 2. Through the coordinated use of the first-stage crusher 3, the second-stage crusher 4 and the third-stage crusher 12, it is possible to achieve more waste lithium batteries.

[0034] The feed port of the first screw conveyor 5 is fixedly connected to the bottom discharge port of the secondary crusher 4 , and the discharge port of the first screw conveyor 5 is fixedly connected to the feed port of the drying drum screen 6 , and the function of conveying materials is realized by the first screw conveyor 5 .

[0035] The feed port of the vibrating screen 7 is connected to the discharge port of the drying drum screen 6, and the discharge port of the vibrating screen 7 is connected to the feed port of the belt magnetic separator 8. A collecting box is provided at the bottom of the vibrating screen 7, and the vibrating screen 7 can realize the screening function.

[0036] The right feed port of the Z-type sorter 10 is fixedly connected to the discharge port of the belt conveyor 9, and the discharge port of the Z-type sorter 10 is fixedly connected to the feed port of the second screw conveyor 11. The Z-type sorter 10 is used for deep screening, thereby improving the screening effect.

[0037] The primary crusher 3, the secondary crusher 4, the drying drum screen 6 and the Z-type sorter 10 are all connected to the feed port of the first cyclone dust collector 17 through pipelines. The first rotating screen 18 is fixedly connected to the bottom of the first cyclone dust collector 17. The dust collection function is realized by the first cyclone dust collector 17, which is convenient for centralized processing of dust and other substances.

[0038] The tertiary crusher 12, the drum screen 14 and the air flow classifier 16 are all connected to the feed port of the second cyclone dust collector 20 through pipelines. The bottom discharge port of the second cyclone dust collector 20 is fixedly connected with a second rotary screen 21, which collects dust in the tertiary crusher 12, the drum screen 14 and the air flow classifier 16 together with the second cyclone dust collector 20 to facilitate subsequent centralized processing and avoid the problem of dust being discharged into the environment and causing pollution.

[0039] A method for using a complete set of equipment for discharging, crushing and sorting waste lithium batteries, comprising the following steps:

[0040] S1. First, the waste lithium battery is put into the feed port of the liquid nitrogen quick-freezing machine 1. The waste lithium battery is frozen and discharged in the liquid nitrogen quick-freezing machine 1. The discharged waste lithium battery enters the stainless steel mesh belt electric heating variable frequency conveyor 2 through the discharge port of the liquid nitrogen quick-freezing machine 1. The waste lithium battery is heated on the stainless steel mesh belt electric heating variable frequency conveyor 2, thereby realizing the functions of thawing and conveying, so that the waste lithium battery enters the primary crusher 3;

[0041] S2, the waste lithium battery enters the primary crusher 3 for the first crushing, and the crushed waste lithium battery enters the secondary crusher 4 for further crushing, which improves the crushing effect of the waste lithium battery. The dust and other substances generated in the primary crusher 3 and the secondary crusher 4 enter the first cyclone dust collector 17 through the pipeline, achieving the dust collection effect, which is convenient for subsequent cleaning;

[0042] S3, the crushed material enters the drying drum screen 6 through the first screw conveyor 5 to achieve the purpose of drying and screening, so that the electrolyte enters the collecting box, the dried material is screened by the vibrating screen 7, and the solid material is magnetically separated by the belt magnetic separator 8, so that the iron material is screened out, and the screening function is achieved. The magnetically separated material enters the Z-type separator 10 through the belt conveyor 9 for re-sorting, and the dust and other substances in the drying drum screen 6 and the Z-type separator 10 also enter the first cyclone dust collector 17 through the pipeline, and the black powder and diaphragm in the first cyclone dust collector 17 enter the first rotary screen 18 for rotary screening, so that the black powder and the diaphragm are separated, and the dust gas in the first cyclone dust collector 17 enters the pulse dust collector 23 through the first conveying pipe 19 for dust removal;

[0043] The remaining materials after sorting by the S4 and Z-type sorters 10 enter the third-stage crusher 12 through the second screw conveyor 11 for the third crushing, which further improves the crushing effect. The crushed materials enter the drum screen 14 through the third screw conveyor 13 for further screening. The remaining materials after screening enter the air flow sorter 16 through the fourth screw conveyor 15 for the final sorting, so that the copper and aluminum powders and the diaphragm are separated. The dust and debris in the third-stage crusher 12, the drum screen 14 and the air flow sorter 16 enter the second cyclone dust collector 20 through the pipeline, and the black powder and the diaphragm in the second cyclone dust collector 20 enter the second rotary screen 21 for rotary screening, so that the black powder and the diaphragm are separated. The dust gas in the second cyclone dust collector 20 enters the pulse dust collector 23 through the second conveying pipe 22 for dust removal;

[0044] S5. The tail gas in the pulse dust collector 23 enters the activated carbon purifier 26 for purification through the cooperation of the discharge pipe 24 and the fan 25, and the purified gas is discharged. In summary, the purpose of crushing and sorting the waste lithium batteries can be achieved.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A complete set of equipment for discharging, crushing and sorting waste lithium batteries, comprising a primary crusher (3) and a pulse dust collector (23), characterized in that: The bottom discharge port of the primary crusher (3) is fixedly connected to the top feed port of the secondary crusher (4); a first screw conveyor (5) is arranged at the rear side of the secondary crusher (4); a drying drum screen (6) is arranged at the discharge port of the first screw conveyor (5); a vibrating screen (7) is arranged at the rear discharge port of the drying drum screen (6); a belt magnetic separator (8) is arranged at the rear side of the vibrating screen (7); the discharge port of the belt magnetic separator (8) is fixedly connected to the feed port of the belt conveyor (9); the left end discharge port of the belt conveyor (9) is fixedly connected to the Z A second screw conveyor (11) is arranged on the left side of the Z-type separator (10), a third-stage crusher (12) is arranged below the left side of the second screw conveyor (11), a bottom discharge port of the third-stage crusher (12) is fixedly connected to the feed port of the third screw conveyor (13), a drum screen (14) is arranged on the left side of the third screw conveyor (13), a fourth screw conveyor (15) is arranged on the front side of the drum screen (14), and a discharge port of the fourth screw conveyor (15) is fixedly connected to the feed port of the airflow separator ( The top feed port of the pulse dust collector (23) is fixedly connected to one end of the first conveying pipe (19) and the second conveying pipe (22), respectively; the other end of the first conveying pipe (19) is fixedly connected to the first cyclone dust collector (17); the other end of the second conveying pipe (22) is fixedly connected to the second cyclone dust collector (20); the top exhaust port of the pulse dust collector (23) is fixedly connected to one end of the discharge pipe (24); the other end of the discharge pipe (24) is fixedly connected to the fan (25); the bottom of the fan (25) is fixedly connected to At the top of the activated carbon purifier (26), the primary crusher (3), the secondary crusher (4), the drying drum screen (6) and the Z-type separator (10) are all connected to the feed port of the first cyclone dust collector (17) through a pipeline, the bottom of the first cyclone dust collector (17) is fixedly connected to a first rotary screen (18), the tertiary crusher (12), the drum screen (14) and the airflow separator (16) are all connected to the feed port of the second cyclone dust collector (20) through a pipeline, and the bottom discharge port of the second cyclone dust collector (20) is fixedly connected to a second rotary screen (21).

2. A complete set of equipment for discharging, crushing and sorting waste lithium batteries according to claim 1, characterized in that: A stainless steel mesh belt electrically heated variable frequency conveyor (2) is arranged on the left side of the primary crusher (3), and the discharge port of the stainless steel mesh belt electrically heated variable frequency conveyor (2) is connected to the top feed port of the primary crusher (3). A liquid nitrogen quick freezer (1) is arranged on the left side of the stainless steel mesh belt electrically heated variable frequency conveyor (2), and the right discharge port of the liquid nitrogen quick freezer (1) is connected to the feed port of the stainless steel mesh belt electrically heated variable frequency conveyor (2).

3. A complete set of equipment for discharging, crushing and sorting waste lithium batteries according to claim 1, characterized in that: The feed port of the first screw conveyor (5) is fixedly connected to the bottom discharge port of the secondary crusher (4), and the discharge port of the first screw conveyor (5) is fixedly connected to the feed port of the drying drum screen (6).

4. A complete set of equipment for discharging, crushing and sorting waste lithium batteries according to claim 1, characterized in that: The feed port of the vibrating screen (7) is connected to the discharge port of the drying drum screen (6), the discharge port of the vibrating screen (7) is connected to the feed port of the belt magnetic separator (8), and a collecting box is provided at the bottom of the vibrating screen (7).

5. A complete set of equipment for discharging, crushing and sorting waste lithium batteries according to claim 1, characterized in that: The right feed port of the Z-type separator (10) is fixedly connected to the discharge port of the belt conveyor (9), and the discharge port of the Z-type separator (10) is fixedly connected to the feed port of the second screw conveyor (11).

6. A method for using a complete set of equipment for discharging, crushing and sorting waste lithium batteries according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. First, the waste lithium batteries are put into the feed port of the liquid nitrogen quick freezer (1). The waste lithium batteries are frozen and discharged in the liquid nitrogen quick freezer (1). The discharged waste lithium batteries enter the stainless steel mesh belt electric heating variable frequency conveyor (2) through the discharge port of the liquid nitrogen quick freezer (1). The waste lithium batteries are heated on the stainless steel mesh belt electric heating variable frequency conveyor (2), thereby realizing the functions of thawing and conveying, so that the waste lithium batteries enter the primary crusher (3); S2, the waste lithium batteries enter the primary crusher (3) for initial crushing, and the crushed waste lithium batteries enter the secondary crusher (4) for further crushing, thereby improving the crushing effect of the waste lithium batteries, and the dust generated in the primary crusher (3) and the secondary crusher (4) enter the first cyclone dust collector (17) through the pipeline, thereby achieving the dust collection effect and facilitating subsequent cleaning; S3, the crushed material enters the drying drum screen (6) through the first screw conveyor (5) to achieve the purpose of drying and screening, so that the electrolyte enters the collection box, the dried material is screened through the vibrating screen (7), the solid material is magnetically separated by the belt magnetic separator (8), so that the iron material is screened out, and the screening function is achieved, the magnetically separated material enters the Z-type separator (10) through the belt conveyor (9) for re-sorting, the dust in the drying drum screen (6) and the Z-type separator (10) also enters the first cyclone dust collector (17) through the pipeline, the black powder and the diaphragm in the first cyclone dust collector (17) enter the first rotary screen (18) for rotary screening, so that the black powder and the diaphragm are separated, and the dust gas in the first cyclone dust collector (17) enters the pulse dust collector (23) through the first conveying pipe (19) for dust removal; The remaining materials after sorting by the S4 and Z-type sorters (10) enter the third-stage crusher (12) through the second screw conveyor (11) for third crushing, thereby further improving the crushing effect. The crushed materials enter the drum screen (14) through the third screw conveyor (13) for further screening. The remaining materials after screening enter the air flow sorter (16) through the fourth screw conveyor (15) for final sorting, thereby separating the copper and aluminum powders from the diaphragm. The dust and debris in the third-stage crusher (12), the drum screen (14) and the air flow sorter (16) enter the second cyclone dust collector (20) through the pipeline. The black powder and the diaphragm in the second cyclone dust collector (20) enter the second rotary screen (21) for rotary screening, thereby separating the black powder and the diaphragm. The dust gas in the second cyclone dust collector (20) enters the pulse dust collector (23) through the second conveying pipe (22) for dust removal. S5. The tail gas in the pulse dust collector (23) enters the activated carbon purifier (26) for purification through the discharge pipe (24) and the fan (25), and the purified gas is discharged. In summary, the purpose of crushing and sorting waste lithium batteries can be achieved.

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