A waste lithium battery electrode recovery device

Abstract

The invention discloses a waste lithium battery pole piece recycling device, which relates to the technical field of lithium battery recycling, and comprises a pyrolysis furnace, wherein a feeding hopper is arranged at the feeding end of the pyrolysis furnace, a material guide pipe is fixedly connected to the discharging end of the pyrolysis furnace, and a pyrolysis crushing device is fixedly connected to one end of the material guide pipe; a cooling treatment device is arranged on the top of the pyrolysis furnace, and the cooling treatment device comprises a treatment box, and a cooling unit and a treatment unit are arranged inside the treatment box. The invention cools the outer wall of the pyrolysis furnace by fixing a plurality of cooling rings on the outer wall of the pyrolysis furnace, thereby reducing the heat dissipated to the surrounding environment during operation, and improving the comfort and safety of the working environment; the invention arranges a pyrolysis crushing component, and utilizes a primary crushing component and a secondary crushing component to stir and crush the raw materials after pyrolysis, so as to avoid the influence of agglomeration of the raw materials after pyrolysis on subsequent air separation and screening operations.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery recycling, in particular to a waste lithium battery pole piece recycling device. Background Art

[0002] Battery electrode recycling refers to the collection of used batteries and electrode scraps from the lithium-ion battery manufacturing process to prevent them from entering the ecosystem and causing harm to the environment. The black powder of the electrodes of used lithium-ion batteries contains a large amount of precious metals such as nickel, cobalt, lithium, and manganese. If it is discarded at will, it will not only cause serious waste of resources, but also pose a huge threat to our living environment. Therefore, it needs to be recycled.

[0003] For example, patent number CN114006071A discloses a method for stripping and recycling the positive electrode powder of waste lithium batteries. The common recycling method requires high-temperature calcination and decomposition of lithium-ion battery materials to remove organic binders and separate the constituent materials of lithium-ion batteries. However, when the existing device performs battery pyrolysis treatment, the high temperature will cause the material to compact and affect the subsequent separation and recycling effect; and when performing pyrolysis operation, the waste gas generated will pollute the environment, and the high temperature of the furnace will cause the working environment to heat up, resulting in a decrease in working comfort, so it is necessary to propose improvements. Summary of the invention

[0004] The purpose of the present invention is to provide a waste lithium battery pole piece recovery device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A waste lithium battery pole piece recycling device comprises a pyrolysis furnace, wherein a feed hopper is provided at the feed end of the pyrolysis furnace, a material guide pipe is fixedly connected to the discharge end of the pyrolysis furnace, and a pyrolysis crushing device for crushing the raw materials after pyrolysis is fixedly connected to one end of the material guide pipe; a cooling treatment device is provided on the top of the pyrolysis furnace, and an airflow sorting device is provided on one side of the pyrolysis crushing device, and the airflow sorting device is implemented by existing technical means.

[0007] As a further solution of the present invention: the pyrolysis crushing device includes a box body, a feed port is provided on one side of the box body close to the material guide pipe, a side of the inner wall of the box body is fixedly connected with an inclined guide plate, a primary crushing assembly is provided on the top of the guide plate, the primary crushing assembly includes two crushing rollers that are staggered up and down, a plurality of equidistantly distributed pressing knife plates are fixedly connected to the outer walls of the two crushing rollers, a material baffle plate is provided on one side of the two crushing rollers, and a groove is provided on the side of the two material baffle plates close to the crushing rollers.

[0008] As a further solution of the present invention: a secondary crushing assembly is arranged below the guide plate, the secondary crushing assembly comprises a crushing box, a grinding unit is fixedly installed on the inner wall of the crushing box, the grinding unit comprises an upper cover plate fixedly connected to the inner wall of the crushing box, a docking column is fixedly connected to the middle part of the inner wall of the upper cover plate, an upper pressure plate is fixedly connected to the edge of the inner wall of the upper cover plate, and the edge of one side of the upper pressure plate close to the docking column is inclined; the bottom of the upper cover plate is rotatably connected to a supporting plate, and the edge of the top of the supporting plate is fixedly connected to a lower pressure plate; a driving motor is arranged at the bottom of the supporting plate, and the output end of the driving motor is fixedly connected to the supporting plate;

[0009] The upper cover plate is tilted and a through opening is provided on the side of the loading plate with a lower height, and a filter is fixedly connected to the inner wall of the through opening; one end of the guide plate is fixedly connected to a discharge pipe, and a material receiving port is provided on the top of the side of the loading plate with a higher height, and the material receiving port is arranged corresponding to the bottom of the discharge pipe.

[0010] As a further solution of the present invention: a discharging screening assembly is arranged below the secondary crushing assembly, and the discharging screening assembly includes a screening barrel, a stirring motor is fixedly installed below the screening barrel, a transmission rod is fixedly connected to the output end of the stirring motor, a screening tray is snap-connected to the middle part of the transmission rod, an inclined screening partition net is fixedly connected to the bottom of the screening tray, a pushing piece is arranged above the screening partition net, the pushing piece includes a mounting ring snap-connected to the transmission rod, a plurality of pushing plates are snap-connected to the outer wall of the mounting ring, a receiving plate is fixedly connected to the bottom of the inner wall of the screening barrel, a discharging port is opened on one side of the bottom of the crushing box, a conveying frame is arranged below the discharging port, and a discharging conveyor belt is rotatably installed on the inner wall of the conveying frame.

[0011] As a further solution of the present invention: the cooling treatment device comprises a treatment box, wherein a cooling unit for cooling the outer wall of the pyrolysis furnace and a treatment unit for treating the gas generated by pyrolysis are arranged inside the treatment box;

[0012] The cooling unit includes an inlet branch plate and an outlet branch plate, a connecting water tank is fixedly connected between the inlet branch plate and the outlet branch plate, a circulating water pump is fixedly installed inside the connecting water tank, a plurality of cooling rings are fixedly connected to the outer wall of the pyrolysis furnace, a plurality of tops of the cooling rings are fixedly connected to a water inlet pipe and a water outlet pipe, a plurality of the water inlet pipes are fixedly connected to the inlet branch plate, a plurality of the water outlet pipes are fixedly connected to the outlet branch plate, and a water replacement pipe is fixedly connected to the top of the connecting water tank.

[0013] As a further solution of the present invention: the processing unit includes a partition box, one end of the partition box is fixedly connected to an air inlet pipe, the bottom of the air inlet pipe is communicated with the interior of the pyrolysis furnace, the other end of the partition box is fixedly connected to an exhaust pipe, the inner wall of the partition box is sequentially snap-connected with a plurality of filters, the middle part of the processing box is rotatably connected with a cover plate, and the top of the partition box and the bottom of the cover plate are correspondingly arranged.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the present invention cools down the outer wall of the pyrolysis furnace by fixing a plurality of cooling rings on the outer wall of the pyrolysis furnace, thereby reducing the heat dissipated to the surrounding environment during operation, improving the comfort and safety of the working environment, and driving the circulation of water in the entire cooling unit by a circulating water pump to ensure uniform cooling effect everywhere; the processing unit is provided to filter and remove harmful gases generated during the pyrolysis of raw materials, thereby reducing pollution to the environment; the filters are connected by snapping, making it more convenient to repair and replace the filters, and they can be replaced according to different filtering needs and the use status of the filters, thereby improving the convenience of use;

[0015] The present invention sets up a pyrolysis crushing component, and utilizes a primary crushing component and a secondary crushing component to disperse and crush the raw materials after pyrolysis, so as to avoid the influence of the agglomeration of the raw materials after pyrolysis on the subsequent air separation and screening operation. The primary crushing component of the present application utilizes the various pressing knife plates on the two crushing rollers to cooperate with each other, and the raw materials after pyrolysis are squeezed and crushed by the rotation of the crushing rollers, and the raw materials are pushed by the rotation of the crushing rollers; the secondary crushing component of the present application drives the support plate and the lower pressure plate to rotate through the driving motor, and utilizes the continuous relative rotation between the lower pressure plate and the upper pressure plate to ensure the uniform crushing of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of the present invention;

[0017] Figure 2 It is a cross-sectional view of the pyrolysis crushing device of the present invention;

[0018] Figure 3 is a cross-sectional view of a cooling treatment device of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the primary crushing assembly of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the upper cover plate of the present invention.

[0021] In the figure: 1. pyrolysis furnace; 2. feed hopper; 3. material guide pipe; 4. box body; 5. discharge conveyor belt; 6. processing box; 7. water exchange pipe; 8. exhaust pipe; 9. cover plate; 10. cooling ring; 11. crushing roller; 12. guide plate; 13. support plate; 14. crushing box; 15. upper cover plate; 16. upper pressure plate; 17. lower pressure plate; 18. screening barrel; 19. screening tray; 20. push plate; 21. receiving plate; 22. filter screen; 23. baffle plate; 24. pressure knife plate; 25. air inlet pipe; 26. connecting water tank; 27. partition box; 28. water inlet manifold; 29. ​​water outlet manifold; 30. filter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in 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 creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 5 In an embodiment of the present invention, a waste lithium battery pole piece recycling device includes a pyrolysis furnace 1, a feed hopper 2 is provided at the feed end of the pyrolysis furnace 1, a material guide pipe 3 is fixedly connected to the discharge end of the pyrolysis furnace 1, and a pyrolysis crushing device for crushing the raw material after pyrolysis is fixedly connected to one end of the material guide pipe 3; a cooling treatment device is provided on the top of the pyrolysis furnace 1, and an airflow sorting device is provided on one side of the pyrolysis crushing device, and the airflow sorting device is implemented by existing technical means.

[0024] The pyrolysis crushing device comprises a box body 4, a feeding port is provided on one side of the box body 4 near the guide pipe 3, a side of the inner wall of the box body 4 is fixedly connected with an inclined guide plate 12, and a primary crushing assembly is arranged on the top of the guide plate 12, the primary crushing assembly comprises two crushing rollers 11 arranged in an upper and lower offset manner, the outer walls of the two crushing rollers 11 are fixedly connected with a plurality of equidistantly distributed pressing knife plates 24, the respective pressing knife plates 24 on the two crushing rollers 11 are staggered and matched with each other, and the rotation of the crushing rollers 11 is used to extrude and crush the raw materials after pyrolysis, and at the same time, the rotation of the crushing rollers 11 is used to push the raw materials, in order to prevent the raw materials from passing through the edge of the crushing counter, a baffle plate 23 is provided on one side of the two crushing rollers 11, and a groove is provided on the side of the two baffle plates 23 near the crushing rollers 11, and the gap between the crushing roller 11 and the box body 4 and the guide plate 12 is blocked by setting the baffle plate 23 to ensure that the raw materials pass through between the two crushing rollers 11 and the crushing effect.

[0025] A secondary crushing assembly is arranged below the guide plate 12, and the secondary crushing assembly includes a crushing box 14, and a grinding unit is fixedly installed on the inner wall of the crushing box 14, and the grinding unit includes an upper cover plate 15 fixedly connected to the inner wall of the crushing box 14, and a docking column is fixedly connected to the middle part of the inner wall of the upper cover plate 15, and an upper pressure plate 16 is fixedly connected to the edge of the inner wall of the upper cover plate 15, and the edge of one side of the upper pressure plate 16 close to the docking column is inclined; the bottom of the upper cover plate 15 is rotatably connected to the supporting plate 13, and the edge of the top of the supporting plate 13 is fixedly connected to the lower pressure plate 17; a gap is left between the lower pressure plate 17 and the upper pressure plate 16 for raw materials to pass through, and a driving motor is arranged at the bottom of the supporting plate 13, and the output end of the driving motor is fixedly connected to the supporting plate 13; the supporting plate 13 and the lower pressure plate 17 are driven to rotate by the driving motor, and the raw materials are evenly crushed and ground by the continuous relative rotation between the lower pressure plate 17 and the upper pressure plate 16.

[0026] In order to realize automatic transfer and unloading of raw materials during the grinding process, the upper cover plate 15 is tilted and a through opening is opened on the side of the lower height of the loading plate, and a filter screen 22 is fixedly connected to the inner wall of the through opening; one end of the guide plate 12 is fixedly connected to a unloading pipe, and a material receiving port is opened on the top of the side of the higher height of the loading plate, and the material receiving port is set corresponding to the bottom of the unloading pipe.

[0027] A discharging screening assembly is arranged below the secondary crushing assembly, and the discharging screening assembly includes a screening barrel 18, and a feeding plate for receiving the raw materials sent out from the through port is arranged above the screening barrel 18. A stirring motor is fixedly installed below the screening barrel 18, and a transmission rod is fixedly connected to the output end of the stirring motor, and a screening tray 19 is connected to the middle of the transmission rod in a snap-fitting manner, and an inclined screening partition net is fixedly connected to the bottom of the screening tray 19; the raw materials sent out from the through port are temporarily placed and received by arranging the screening tray 19;

[0028] A pusher is provided above the screen partition net, and the pusher includes a mounting ring that is snap-connected with the transmission rod, and a plurality of pusher plates 20 are snap-connected to the outer wall of the mounting ring. The pusher is provided to stir and break up the raw materials on the screen partition net, and push them so that they can pass through the screen partition net and fall down; since the screen partition net and the pusher itself are snap-connected, in a specific implementation, different forms of screen partition nets and pushers can be replaced according to the needs of raw material filtration;

[0029] In order to realize the receiving and conveying of raw materials, a receiving plate 21 is fixedly connected to the bottom of the inner wall of the screening barrel 18, a discharge port is opened on one side of the bottom of the crushing box 14, a conveying frame is arranged below the discharge port, and a discharge conveyor belt 5 is rotatably installed on the inner wall of the conveying frame.

[0030] The cooling treatment device comprises a treatment box 6, inside of which a cooling unit for cooling the outer wall of the pyrolysis furnace 1 and a treatment unit for treating the gas generated by pyrolysis are arranged;

[0031] The cooling unit includes an inlet water branch plate 28 and an outlet water branch plate 29, a connecting water tank 26 is fixedly connected between the inlet water branch plate 28 and the outlet water branch plate 29, a circulating water pump is fixedly installed inside the connecting water tank 26, a plurality of cooling rings 10 are fixedly connected to the outer wall of the pyrolysis furnace 1, the tops of the plurality of cooling rings 10 are fixedly connected to water inlet pipes and water outlet pipes, a plurality of water inlet pipes are fixedly connected to the inlet water branch plate 28, and a plurality of water outlet pipes are fixedly connected to the outlet water branch plate 29. By fixing a plurality of cooling rings 10 on the outer wall of the pyrolysis furnace 1, the heat at various locations on the outer wall of the pyrolysis furnace 1 is uniformly dissipated and absorbed, and the circulating water pump drives the inlet water branch plate 28 and the outlet water branch plate 29 and the circulation of water in the entire cooling unit to ensure uniform cooling and temperature reduction effect at various locations of the pyrolysis furnace;

[0032] A water changing pipe 7 is fixedly connected to the top of the water tank 26, and a sealing plug is snap-connected to the top of the water changing pipe 7. By setting the water changing pipe 7, the water in the cooling unit can be replaced and replenished after a period of use. The water changing pipe 7 can also be connected to the low-temperature water of the refrigeration equipment to ensure the cooling effect. By setting the cooling unit, the outer wall of the pyrolysis furnace 1 is cooled, thereby reducing the heat dissipated to the surrounding environment during operation, thereby improving the comfort and safety of the working environment.

[0033] The processing unit includes a partition box 27, one end of which is fixedly connected to an air inlet pipe 25, the bottom of which is connected to the interior of the pyrolysis furnace 1, and the other end of the partition box 27 is fixedly connected to an exhaust pipe 8. The inner wall of the partition box 27 is sequentially connected with a plurality of filters 30, each of which is implemented by means of existing technology. By setting up the processing unit, harmful gases generated during the pyrolysis of raw materials are filtered and removed, thereby reducing pollution to the environment.

[0034] The middle of the processing box 6 is rotatably connected with a cover plate 9, and the top of the partition box 27 is arranged corresponding to the bottom of the cover plate 9. By snap-fitting and connecting the filters 30 and arranging the cover plate 9, it is more convenient to repair and replace the filters 30.

[0035] When the present invention is in use, the raw material black powder is fed into the feed hopper 2, and then fed into the pyrolysis furnace 1 by the feed hopper 2. The pyrolysis operation is performed by the pyrolysis furnace 1. The harmful gas generated during the pyrolysis process is fed into the partition box 27 through the air intake pipe 25, and then filtered by a plurality of filters 30 and then sent out through the exhaust pipe 8. When the pyrolysis furnace 1 is working, the circulating water pump is started to drive the water in each cooling ring 10 to flow, and the heat of the outer wall of the pyrolysis furnace 1 is absorbed by each cooling ring 10 to reduce the working environment temperature.

[0036] The raw material after pyrolysis is fed into the box body 4 by the guide pipe 3, and is carried and moved by the guide plate 12. When the raw material passes the position of the crushing knife tube, the crushing roller 11 drives each pressing knife plate 24 to rotate, squeezes and crushes the raw material mechanically and pushes the raw material to move. After the raw material passes through the crushing roller 11, it enters the grinding unit through the feeding pipe and the receiving port, and the driving motor drives the supporting plate 13 and the lower pressing plate 17 to rotate. The raw material is crushed and ground by the relative rotation between the lower pressing plate 17 and the upper pressing plate 16. During the grinding process, the raw material moves toward the through port under the action of gravity, passes through the filter screen 22, and is sent into the screening barrel 18 by the receiving plate 21, and is received by the screening partition net. The stirring motor drives the transmission rod and the pushing piece to rotate, stirs and scatters the raw material and makes it pass through the screening partition net and fall onto the receiving plate 21, and is pushed to the discharge conveyor belt 5 by the receiving plate 21 and sent out.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A waste lithium battery pole piece recycling device, characterized in that: The invention comprises a pyrolysis furnace (1), wherein a feed hopper (2) is provided at a feed end of the pyrolysis furnace (1), a material guide pipe (3) is fixedly connected to a material discharge end of the pyrolysis furnace (1), and a pyrolysis crushing device for crushing raw materials after pyrolysis is fixedly connected to one end of the material guide pipe (3); a cooling treatment device is provided on the top of the pyrolysis furnace (1), and the cooling treatment device comprises a treatment box (6), and a cooling unit for cooling the outer wall of the pyrolysis furnace (1) and a treatment unit for treating the gas generated by pyrolysis are provided inside the treatment box (6); The pyrolysis crushing device comprises a box body (4), one side of the inner wall of the box body (4) is fixedly connected to a guide plate (12) arranged obliquely, a primary crushing assembly is arranged on the top of the guide plate (12), a secondary crushing assembly is arranged below the guide plate (12), the secondary crushing assembly comprises a crushing box (14), a grinding unit is fixedly mounted on the inner wall of the crushing box (14); the grinding unit comprises an upper cover plate (15), a docking column is fixedly connected to the middle of the inner wall of the upper cover plate (15), and the upper cover plate (15) is provided with a plurality of support members. 5) An upper pressure plate (16) is fixedly connected to the edge of the inner wall, and the edge of the upper pressure plate (16) is inclined near the docking column; the bottom of the upper cover plate (15) is rotatably connected to a support plate (13), and the edge of the top of the support plate (13) is fixedly connected to a lower pressure plate (17); a drive motor is arranged at the bottom of the support plate (13), and the output end of the drive motor is fixedly connected to the support plate (13); a through opening is opened on one side of the upper cover plate (15), and a filter screen (22) is fixedly connected to the inner wall of the through opening.

2. A waste lithium battery pole piece recovery device according to claim 1, characterized in that: The primary crushing assembly comprises two crushing rollers (11) arranged in an upper and lower staggered manner, the outer walls of the two crushing rollers (11) are fixedly connected to a plurality of equally spaced pressing knife plates (24), one side of the two crushing rollers (11) is provided with a material baffle plate (23), and one side of the two material baffle plates (23) is provided with a groove.

3. A waste lithium battery pole piece recycling device according to claim 1, characterized in that: A discharging screening assembly is arranged below the secondary crushing assembly, and the discharging screening assembly comprises a screening barrel (18), a stirring motor is fixedly mounted below the screening barrel (18), a transmission rod is fixedly connected to the output end of the stirring motor, a screening tray (19) is snap-connected to the middle of the transmission rod, a screening partition net is fixedly connected to the bottom of the screening tray (19), a pushing piece is arranged above the screening partition net, the pushing piece comprises a mounting ring, and a plurality of pushing plates (20) are snap-connected to the outer wall of the mounting ring.

4. A waste lithium battery pole piece recovery device according to claim 3, characterized in that: A receiving plate (21) is fixedly connected to the bottom of the inner wall of the screening barrel (18), a discharge port is provided on one side of the bottom of the crushing box (14), a conveying frame is provided below the discharge port, and a discharge conveyor belt (5) is rotatably mounted on the inner wall of the conveying frame.

5. The waste lithium battery pole piece recycling device according to claim 1, characterized in that: The cooling unit comprises an inlet water branch plate (28) and an outlet water branch plate (29); a connecting water tank (26) is fixedly connected between the inlet water branch plate (28) and the outlet water branch plate (29); a circulating water pump is fixedly installed inside the connecting water tank (26); a plurality of cooling rings (10) are fixedly connected to the outer wall of the pyrolysis furnace (1); the tops of the plurality of cooling rings (10) are fixedly connected to an inlet water pipe and an outlet water pipe; a plurality of the inlet water pipes are fixedly connected to the inlet water branch plate (28); a plurality of the outlet water pipes are fixedly connected to the outlet water branch plate (29); and a water replacement pipe (7) is fixedly connected to the top of the connecting water tank (26).

6. The waste lithium battery pole piece recycling device according to claim 1, characterized in that: The processing unit comprises a partition box (27), one end of the partition box (27) is fixedly connected to an air intake pipe (25), the bottom of the air intake pipe (25) is communicated with the interior of the pyrolysis furnace (1), the other end of the partition box (27) is fixedly connected to an exhaust pipe (8), the inner wall of the partition box (27) is sequentially snap-connected to a plurality of filters (30), and the middle part of the processing box (6) is rotatably connected to a cover plate (9).

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