A waste battery treatment device and a treatment method

Abstract

The present invention discloses a waste battery treatment device and a treatment method. The waste battery treatment device comprises a hopper, a dry stripper, a graphite separator, an ultra-fine separator, a carbon powder collector, a pulse dust collector and a first induced draft fan which are arranged in sequence. The dry stripper comprises a dry stripper housing. A stripping ring is installed on the inner side wall of the dry stripper housing. A plurality of convex teeth are arranged inside the stripping ring. A grinding disc driven by a main motor is rotatably connected inside the dry stripper housing. The grinding disc is located inside the stripping ring. A plurality of stripping blocks are installed on the edge of the grinding disc. The lower end of the dry stripper housing is connected with a first ultrasonic separator. The lower end of the ultra-fine separator is connected with a second ultrasonic separator. The treatment method utilizes the combination of the dry stripper, the graphite separator, the ultra-fine separator, the carbon powder collector and the pulse dust collector. The collected aluminum foil has a large particle size and is sheet-shaped, reducing the coating rate on the black powder, having high production efficiency and high purity of the recovered black powder.

Description

Technical Field

[0001] The present invention relates to the technical field of waste battery treatment, and specifically, to a waste battery treatment device and a treatment method. Background Art

[0002] The positive electrode plate of a lithium battery includes aluminum foil, and graphite powder is coated on the surface of the aluminum foil. When recycling the waste positive electrode plate, it is necessary to crush the waste positive electrode plate. The aluminum foil collected by the traditional crushing and separation method has a small particle size and a high coating property for the black powder, resulting in low purity and low recovery rate of the black powder. Summary of the Invention

[0003] The purpose of the present invention is to provide a waste battery treatment device and a treatment method for the above problems, with high production efficiency and high purity of the recovered black powder.

[0004] To achieve the above object, the present invention discloses a waste battery treatment device, which includes a hopper, a dry stripper, a graphite separator, an ultra-fine separator, a carbon powder collector, a pulse dust collector, and a first induced draft fan arranged in sequence. The dry stripper includes a dry stripper housing, a stripping ring is installed on the inner side wall of the dry stripper housing, several convex teeth are provided inside the stripping ring, a grinding disc driven by a main motor is rotatably connected inside the dry stripper housing, the grinding disc is located inside the stripping ring, and several stripping blocks are installed on the edge of the grinding disc. The lower end of the dry stripper housing is connected to a first ultrasonic separator, and the lower end of the ultra-fine separator is connected to a second ultrasonic separator. When in use, the first induced draft fan introduces the waste positive electrode plate into the dry stripper, and the dry stripper strips it into coarse powder I and fine powder I; the coarse powder I enters the first ultrasonic separator, and the first ultrasonic separator separates the coarse powder I into aluminum powder I and black powder I. The fine powder I enters the graphite separator and the ultra-fine separator, and the ultra-fine separator separates the fine powder I into coarse powder II and fine powder II; the coarse powder II enters the second ultrasonic separator, and the second ultrasonic separator separates the coarse powder II into aluminum powder II and black powder II. The fine powder II enters the carbon powder collector to obtain black powder III; the airflow carrying the fine powder II enters the pulse dust collector to obtain black powder IV. The production efficiency is high, and the purity of the recovered black powder is high.

[0005] Preferably, it further includes a second induced draft fan and a bag filter. When in use, the black powder III and the black powder IV enter the bag filter under the action of the second induced draft fan, with high production efficiency and high purity of the recovered black powder. Both the first induced draft fan and the second induced draft fan adopt a negative pressure Roots blower.

[0006] Preferably, the dry stripper housing is connected to a first feeding pipe, a first auger is installed at the lower end of the hopper, and the output end of the first auger is located above the input end of the first feeding pipe. When in use, the waste positive electrode plate enters the dry stripper housing through the first auger, which is convenient to use.

[0007] Preferably, a first black powder collection port and a first aluminum sheet collection port are provided on the first ultrasonic separator, and a second black powder collection port and a second aluminum sheet collection port are provided on the second ultrasonic separator. A second auger is further included. The first black powder collection port, the second black powder collection port are communicated with the second auger, and the output end of the second auger is located above the input end of the first feed pipe. During use, black powder I and black powder II re-enter the dry stripping device housing through the second auger, and the recovered black powder has a high purity.

[0008] Preferably, a second feed pipe is connected between the graphite separator and the lower part of the ultra-fine separator, a third feed pipe is connected between the upper part of the ultra-fine separator and the upper part of the carbon powder collector, a fourth feed pipe is connected between the upper end of the carbon powder collector and the lower part of the pulse dust collector, and a fifth feed pipe is connected between the upper part of the pulse dust collector and the first induced draft fan. It is convenient to use.

[0009] Preferably, a dry stripper rear shell is connected to the rear of the dry stripper housing. A dry stripper feed port is provided on the dry stripper rear shell. A dry stripper front shell is connected to the front of the dry stripper housing. The graphite separator is installed on the dry stripper front shell. A dry stripper discharge port is provided at the lower part of the dry stripper housing. A third auger is installed below the dry stripper housing. The input end of the third auger corresponds to the dry stripper discharge port, and the output end of the third auger corresponds to the input end of the first ultrasonic separator. During use, the first induced draft fan introduces the waste positive electrode plate into the dry stripper, and the dry stripper strips it into coarse powder I and fine powder I; the coarse powder I enters the first ultrasonic separator, and the fine powder I enters the graphite separator.

[0010] Preferably, a limiting groove is provided on the inner side wall of the dry stripper housing, the stripping ring is located in the limiting groove, and a limiting ring is connected to the inner side wall of the dry stripper housing and located behind the stripping ring. During manufacturing, it is convenient to install the stripping ring.

[0011] Preferably, the shape of the stripping block is rectangular or circular. During use, the stripping effect is good and it is convenient to use.

[0012] Preferably, the dry stripper further includes a base. The dry stripper housing and the main motor are installed on the base. The output end of the main motor is connected with a main shaft, and the main shaft extends into the dry stripper housing and is connected with a grinding disc. During use, the main motor drives the main shaft to rotate, and then drives the grinding disc to rotate.

[0013] A method for treating waste batteries using the processing equipment as described above includes the following steps:

[0014] S1. The first induced draft fan introduces the waste positive electrode plate into the dry stripper, and the dry stripper strips it into coarse powder I and fine powder I;

[0015] S2. The coarse powder I enters the first ultrasonic separator, which separates the coarse powder I into aluminum powder I and black powder I. The fine powder I enters the graphite separator and the ultra-fine separator, and the ultra-fine separator separates the fine powder I into coarse powder II and fine powder II;

[0016] S3. The coarse powder II enters the second ultrasonic separator, which separates the coarse powder II into aluminum powder II and black powder II. The fine powder II enters the carbon powder collector to obtain black powder III;

[0017] S4. The air flow carrying the fine powder II enters the pulse dust collector to obtain black powder IV.

[0018] Preferably, the following steps are further included:

[0019] S5. The black powder I and the black powder II re-enter the dry stripper.

[0020] In summary, the beneficial effects of the present invention are as follows: In the treatment method of the present invention, the combination of the dry stripper, the graphite separator, the ultra-fine separator, the carbon powder collector, and the pulse dust collector greatly improves the purity and recovery rate of the black powder. On the premise of ensuring a significant increase in the raw material processing volume, the raw material processing volume can reach more than 0.5 - 5 tons per hour, and the upper limit of the black powder purity can be increased from 90% in the current existing technology to 98%. Description of the Drawings

[0021] Figure 1 is the structural schematic diagram of a waste battery treatment device of the present invention;

[0022] Figure 2 is the top view structural schematic diagram of a waste battery treatment device of the present invention;

[0023] Figure 3 is the structural schematic diagram of the dry stripper in a waste battery treatment device of the present invention;

[0024] Figure 4 is Figure 3 the structural schematic diagram of the partial A in

[0025] Figure 5 is Figure 4 the internal structural schematic of the cross-section B - B in Figure 1 ;

[0026] Figure 6 is Figure 4 the internal structural schematic of the cross-section B - B in Figure 2 .

[0027] In the figure: 1. Hopper; 2. First auger; 3. First feed pipe; 4. Second auger; 5. Base; 6. Main motor; 7. Large sleeve; 8. Dry stripper; 9. Graphite separator; 10. Third auger; 11. First ultrasonic separator; 12. First black powder collection port; 13. First aluminum sheet collection port; 14. Second feed pipe; 15. Ultra-fine separator; 16. Second ultrasonic separator; 17. Second black powder collection port; 18. Second aluminum sheet collection port; 19. Third feed pipe; 20. Carbon powder collector; 21. Fourth feed pipe; 22. Pulse dust collector; 23. Fifth feed pipe; 24. First induced draft fan; 25. Separator motor; 26. Main shaft; 27. Dry stripper feed port; 28. Dry stripper housing; 29. Dry stripper front shell; 30. Dry stripper discharge port; 31. Stripping ring; 32. Stripping block; 33. Dry stripper rear shell; 34. Grinding disc; 35. Limit ring; 36. Limit groove. Detailed implementation mode

[0028] The following will further describe in detail the specific implementation mode of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0030] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "plurality" is two or more.

[0031] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0032] Example 1, asFigures 1 to 6 As shown in the figure, a waste battery treatment device includes a hopper 1, a dry stripper 8, a graphite separator 9, an ultra-fine separator 15, a carbon powder collector 20, a pulse dust collector 22, and a first induced draft fan 24 arranged in sequence. The dry stripper 8 includes a dry stripper housing 28. A stripping ring 31 is installed on the inner side wall of the dry stripper housing 28. There are several convex teeth inside the stripping ring 31. A grinding disc 34 driven by a main motor 6 is rotatably connected inside the dry stripper housing 28. The grinding disc 34 is located inside the stripping ring 31. Several stripping blocks 32 are installed on the edge of the grinding disc 34. The lower end of the dry stripper housing 28 is connected to a first ultrasonic separator 11. The lower end of the ultra-fine separator 15 is connected to a second ultrasonic separator 16. When in use, the first induced draft fan 24 introduces the waste positive electrode plate into the dry stripper 8, and the dry stripper 8 strips it into coarse powder I and fine powder I; the coarse powder I enters the first ultrasonic separator 11, and the first ultrasonic separator 11 separates the coarse powder I into aluminum powder I and black powder I. The fine powder I enters the graphite separator 9 and the ultra-fine separator 15, and the ultra-fine separator 15 separates the fine powder I into coarse powder II and fine powder II; the coarse powder II enters the second ultrasonic separator 16, and the second ultrasonic separator 16 separates the coarse powder II into aluminum powder II and black powder II. The fine powder II enters the carbon powder collector 20 to obtain black powder III; the airflow carrying the fine powder II enters the pulse dust collector 22 to obtain black powder IV. The collected aluminum foil has a large particle size and is in a flake shape, reducing the coating rate on the black powder, with high production efficiency and high purity of the recovered black powder.

[0033] Preferably, it further includes a second induced draft fan and a bag filter. When in use, black powder III and black powder IV enter the bag filter under the action of the second induced draft fan, with high production efficiency and high purity of the recovered black powder. Both the first induced draft fan 24 and the second induced draft fan adopt negative pressure Roots blowers.

[0034] The dry stripper housing 28 is connected to a first feed pipe 3. A first auger 2 is installed at the lower end of the hopper 1. The output end of the first auger 2 is located above the input end of the first feed pipe 3. When in use, the waste positive electrode plate enters the dry stripper housing 28 through the first auger 2, which is convenient to use.

[0035] The dry stripper 8 further includes a base 5. The dry stripper housing 28 and the main motor 6 are installed on the base 5. The output end of the main motor 6 is connected to a main shaft 26. A large sleeve 7 matched with the main shaft 26 is installed on the base 5. After the main shaft 26 extends into the dry stripper housing 28, it is connected to the grinding disc 34. When in use, the main motor 6 drives the main shaft 26 to rotate, and then drives the grinding disc 34 to rotate.

[0036] The rear of the dry peeling machine housing 28 is connected to the dry peeling machine rear housing 33. A dry peeling machine feed inlet 27 is provided on the dry peeling machine rear housing 33. The first conveying pipe 3 is connected to the dry peeling machine feed inlet 27. The front of the dry peeling machine housing 28 is connected to the dry peeling machine front housing 29. The graphite separator 9 is installed on the dry peeling machine front housing 29. A separator motor 25 for driving the graphite separator 9 is also provided on the dry peeling machine front housing 29. A dry peeling machine discharge port 30 is provided at the lower part of the dry peeling machine housing 28. A third auger 10 is installed below the dry peeling machine housing 28. The input end of the third auger 10 corresponds to the dry peeling machine discharge port 30, and the output end of the third auger 10 corresponds to the input end of the first ultrasonic separator 11. During use, the first induced draft fan 24 introduces the waste positive electrode plates into the dry peeling machine 8, and the dry peeling machine 8 peels them into coarse powder I and fine powder I; the coarse powder I enters the first ultrasonic separator 11, and the fine powder I enters the graphite separator 9.

[0037] A limiting groove 36 is provided on the inner side wall of the dry peeling machine housing 28. The peeling ring 31 is located in the limiting groove 36. A limiting ring 35 is connected to the inner side wall of the dry peeling machine housing 28 and is located behind the peeling ring 31. During manufacturing, it is convenient to install the peeling ring 31. Preferably, the shape of the peeling block 32 is rectangular or circular. During use, the peeling effect is good and it is convenient to use.

[0038] A first black powder collection port 12 and a first aluminum sheet collection port 13 are provided on the first ultrasonic separator 11. A second black powder collection port 17 and a second aluminum sheet collection port 18 are provided on the second ultrasonic separator 16. A second auger 4 is further included. The first black powder collection port 12, the second black powder collection port 17 are communicated with the second auger 4, and the output end of the second auger 4 is located above the input end of the first conveying pipe 3. During use, the black powder I and the black powder II re-enter the dry peeling machine housing 28 through the second auger 4, and the recovered black powder has a high purity.

[0039] A second conveying pipe 14 is connected between the graphite separator 9 and the lower part of the ultra-fine separator 15. A third conveying pipe 19 is connected between the upper part of the ultra-fine separator 15 and the upper part of the carbon powder collector 20. A fourth conveying pipe 21 is connected between the upper end of the carbon powder collector 20 and the lower part of the pulse dust collector 22. A fifth conveying pipe 23 is connected between the upper part of the pulse dust collector 22 and the first induced draft fan 24. It is convenient to use.

[0040] Embodiment 2, a method for treating waste batteries using the waste battery treatment equipment as described above, includes the following steps:

[0041] S1. The first induced draft fan 24 introduces the waste positive electrode plates into the dry peeling machine 8, and the dry peeling machine 8 peels them into coarse powder I and fine powder I.

[0042] S2. The coarse powder I enters the first ultrasonic separator 11. The first ultrasonic separator 11 separates the coarse powder I into aluminum powder I and black powder I. The fine powder I enters the graphite separator 9 and the ultra-fine separator 15. The ultra-fine separator 15 separates the fine powder I into coarse powder II and fine powder II.

[0043] S3. The coarse powder II enters the second ultrasonic separator 16. The second ultrasonic separator 16 separates the coarse powder II into aluminum powder II and black powder II. The fine powder II enters the carbon powder collector 20 to obtain black powder III.

[0044] S4. The airflow carrying the fine powder II enters the pulse dust collector 22 to obtain black powder IV.

[0045] S5. The black powder I and black powder II re-enter the dry stripper 8.

[0046] S6. The black powder III and black powder IV enter the bag filter under the action of the second induced draft fan.

[0047] The used pole piece is peeled by the pneumatic dry stripper 8 and the aluminum foil is exported in the first step. The ultra-fine separator and the ultrasonic separator are used for the second separation and the first collection to obtain the first part of black powder. Then, the black powder collector and the compartment pulse dust collector are used for the second collection of the black powder in the airflow material coming out of the black powder collector to obtain the second part of black powder. Finally, the first part of black powder and the second part of black powder are transported by airflow through the bag type conveying dust collector to obtain high-purity and high-recovery black powder.

[0048] By improving the pneumatic dry stripper 8, on the one hand, a dry stripper discharge port 30 with a third auger 10 is arranged at the bottom of the stripper, which can ensure the continuity of the whole production device, without the need to pause to deal with the problem of the accumulated aluminum foil discharge in the stripper, improving the production efficiency, so as to meet the requirement of realizing high production capacity while ensuring the particle size of the black powder meets the standard, and the raw material processing capacity is more than 0.5 - 5 tons per hour, for the collection of the positive black powder.

[0049] The general working pressure of the negative pressure pneumatic conveying system in the whole production device is 0.04 - 0.08 MPa.

[0050] In the treatment method of the present invention, the combination of the dry stripper 8, the graphite separator 9, the ultra-fine separator 15, the carbon powder collector 20, and the pulse dust collector 22 greatly improves the purity and recovery rate of the black powder. On the premise of ensuring a significant increase in the raw material processing amount, the raw material processing amount can reach more than 0.5 - 5 tons per hour, and the upper limit of the black powder purity can be increased from 90% of the current existing technology to 98%.

[0051] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A waste battery treatment device, characterized in that, It includes a hopper (1), a dry stripper (8), a graphite separator (9), an ultra-fine separator (15), a toner collector (20), a pulse dust collector (22) and a first induced draft fan (24) arranged in sequence. The dry stripper (8) includes a dry stripper housing (28). A stripping ring (31) is installed on the inner side wall of the dry stripper housing (28). There are several convex teeth inside the stripping ring (31). A grinding disc (34) driven by a main motor (6) is rotatably connected inside the dry stripper housing (28). The grinding disc (34) is located inside the stripping ring (31). Several stripping blocks (32) are installed on the edge of the grinding disc (34). The lower end of the dry stripper housing (28) is connected to a first ultrasonic separator (11). The lower end of the ultra-fine separator (15) is connected to a second ultrasonic separator (16); The dry stripper housing (28) is connected to a first feed pipe (3). A first auger (2) is installed at the lower end of the hopper (1). The output end of the first auger (2) is located above the input end of the first feed pipe (3); A first black powder collection port (12) and a first aluminum sheet collection port (13) are provided on the first ultrasonic separator (11). A second black powder collection port (17) and a second aluminum sheet collection port (18) are provided on the second ultrasonic separator (16). It further includes a second auger (4). The first black powder collection port (12), the second black powder collection port (17) are communicated with the second auger (4). The output end of the second auger (4) is located above the input end of the first feed pipe (3).

2. The waste battery treatment equipment according to claim 1, characterized in that A second feed pipe (14) is connected between the graphite separator (9) and the lower part of the ultra-fine separator (15). A third feed pipe (19) is connected between the upper part of the ultra-fine separator (15) and the upper part of the toner collector (20). A fourth feed pipe (21) is connected between the upper end of the toner collector (20) and the lower part of the pulse dust collector (22). A fifth feed pipe (23) is connected between the upper part of the pulse dust collector (22) and the first induced draft fan (24).

3. The waste battery processing device according to any one of claims 1 to 2, characterized in that, The rear part of the dry stripper housing (28) is connected to a dry stripper rear shell (33). A dry stripper feed port (27) is provided on the dry stripper rear shell (33). The front part of the dry stripper housing (28) is connected to a dry stripper front shell (29). The graphite separator (9) is installed on the dry stripper front shell (29). A dry stripper discharge port (30) is provided at the lower part of the dry stripper housing (28).

4. The waste battery treatment device according to claim 3, characterized in that, A limiting groove (36) is provided on the inner side wall of the dry stripper housing (28). The stripping ring (31) is located in the limiting groove (36). A limiting ring (35) is connected to the inner side wall of the dry stripper housing (28) and is located behind the stripping ring (31).

5. The waste battery treatment equipment according to any one of claims 1 to 2, characterized in that The shape of the stripping block (32) is rectangular or circular.

6. The waste battery treatment equipment according to any one of claims 1 to 2, characterized in that, The dry stripper (8) further includes a base (5). The dry stripper housing (28) and the main motor (6) are installed on the base (5). The output end of the main motor (6) is connected to a main shaft (26). After the main shaft (26) extends into the dry stripper housing (28), it is connected to the grinding disc (34).

7. A method for treating waste batteries using the processing device as described in claim 1, characterized in that, It includes the following steps: S1. The first induced draft fan (24) introduces the waste cathode sheets into the dry stripper (8), and the dry stripper (8) strips them into coarse powder I and fine powder I; S2. The coarse powder I enters the first ultrasonic separator (11), and the first ultrasonic separator (11) separates the coarse powder I into aluminum powder I and black powder I. The fine powder I enters the graphite separator (9) and the ultra-fine separator (15), and the ultra-fine separator (15) separates the fine powder I into coarse powder II and fine powder II; S3. The coarse powder II enters the second ultrasonic separator (16), and the second ultrasonic separator (16) separates the coarse powder II into aluminum powder II and black powder II. The fine powder II enters the carbon powder collector (20) to obtain black powder III; S4. The airflow carrying the fine powder II enters the pulse dust collector (22) to obtain black powder IV.

8. The waste battery treatment method according to claim 7, characterized in that, It further includes the following steps: S5. The black powder I and the black powder II re-enter the dry stripper (8).

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