Primary screening assembly for new energy power battery recycling

Abstract

The utility model relates to the technical field of new energy battery recovery processing, in particular to a primary screening assembly for new energy power battery recovery, which comprises a primary screening box and a feeding slide way embedded in the top of the primary screening box, and further comprises a vertical dust collection slide way communicated with the bottom of the feeding slide way, and the square inscribed circle is transversely arranged on one vertical surface of the vertical dust collection slideway in a communicating manner. According to the principle that the density difference of lithium iron phosphate and graphite is large on the premise that the volume difference is not large and the volume difference is large on the premise that the mass difference is not large, lithium iron phosphate particles can be screened out through the former, and then lithium iron phosphate powder and graphite particles can be screened out through the latter. And finally, the graphite powder is settled in the non-vertical pipe body of the rear half section of the powder pipe, so that the lithium iron phosphate particles and powder and the graphite particles and powder can be accurately screened out, and the screening effects of the lithium iron phosphate particles and powder and the graphite particles and powder are improved.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery recycling technology, and in particular to a primary screening component for recycling new energy power batteries. Background Technology

[0002] Because discarded and scrapped new energy power batteries contain a large amount of heavy metals and precious and rare metals, their direct disposal would cause great pollution to the natural environment. Properly recycling and dismantling these batteries can not only reduce environmental pollution but also conserve resources, achieving two goals at once. After recycling, discarded new energy power batteries need to be dismantled and discharged first, followed by crushing and initial screening to separate non-metallic and metallic materials for subsequent advanced processing.

[0003] Because the positive and negative electrode sheets of waste power batteries are pulverized by a pulverizer, lithium iron phosphate and graphite are crushed into fine mixed powders and small particles, while metal foil is lumped into metal particles and separator fragments. Currently, there is no sorting and recycling device that can simultaneously screen out these four materials. To solve the above technical problems, existing patent application number 202122205499.8 discloses a waste power battery electrode sheet sorting and recycling device. This device performs a primary separation of the residue through perforation. Powder, separator, and other impurities remain here and are then sucked into the dust removal mechanism through a connecting pipe by the negative pressure generated by the fan. Finally, the impurities are discharged into the collection bucket. Through the first, second, and third filter layers with progressively decreasing pore sizes, metal foil, lithium iron phosphate, and graphite can be sorted, and the sorted materials fall into their respective collection buckets. In the above-mentioned prior art, when the device screens graphite and lithium iron phosphate, graphite particles of different sizes are mixed in with the lithium iron phosphate powder and particles, resulting in a relatively poor screening effect. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a primary screening component for recycling new energy power batteries, so as to solve the problem that graphite particles of different sizes are mixed in with lithium iron phosphate powder and granules when screening graphite and lithium iron phosphate, resulting in a relatively poor screening effect.

[0005] To achieve the above objectives, this utility model provides a primary screening assembly for recycling new energy power batteries, including a primary screening box and a feeding chute embedded in the top of the primary screening box. The primary screening assembly for recycling new energy power batteries further includes:

[0006] A vertical dust suction chute connected to the bottom of the feeding chute.

[0007] A square-to-circle connection is provided on one of the vertical surfaces of the vertical vacuum chute.

[0008] A sieving section is provided on the square-to-circular surface, which is used to separate lithium iron phosphate powder and graphite particles with large volume differences under the premise of small mass difference.

[0009] A suction fan is installed on the primary screening box. A powder pipe is connected between the suction port of the suction fan and the screening section. The end of the powder pipe near the screening section is a vertical tube. The powder pipe is used to cause the lithium iron phosphate powder and graphite particles that drift into it to settle back into the screening section under the influence of gravity.

[0010] Preferably, the screening section includes:

[0011] A detachable flange pipe installed at one end of the square joint.

[0012] A sieving box is fixedly installed at one end of the connecting flange pipe, and one end of the powder pipe is fixedly installed at the top of the sieving box.

[0013] A tiltable and detachable screening screen installed inside the screening box.

[0014] Connect to the material discharge chute located on the screening box.

[0015] Preferably, the height of the top of the screening screen is lower than the height of the bottom of the docking flange pipe, and the top of the screening screen is flush with the bottom of the material discharge chute.

[0016] Preferably, the connecting flange pipe and the feeding chute are located on two opposite vertical surfaces outside the screening box.

[0017] Preferably, the screening section further includes a protruding edge fixedly disposed on the end face of the feeding chute, the protruding edge being used to limit the suspension of the collection bag.

[0018] Preferably, the screening section further includes a bottom cover hinged to the bottom of the screening box, and the screening box is provided with a telescopic cylinder for opening and closing the bottom cover.

[0019] Preferably, the two ends of the telescopic cylinder are respectively hinged to the screening box and the bottom cover, and the telescopic cylinder and the discharge slide are respectively located on two adjacent vertical surfaces outside the screening box.

[0020] Preferably, the primary screening component for recycling new energy power batteries further includes:

[0021] Rotate the shaking screen frame located inside the primary screening box, and the bottom of the vertical dust suction chute is inserted into the top inside the shaking screen frame.

[0022] A reciprocating drive unit for driving the shaking screen frame to reciprocate.

[0023] The beneficial effects of this utility model are:

[0024] This invention utilizes the principle that lithium iron phosphate and graphite have a large density difference under the premise of small volume difference, and a large volume difference under the premise of small mass difference. First, lithium iron phosphate particles are screened out using the former, then lithium iron phosphate powder and graphite particles are screened out using the latter. Finally, the graphite powder settles inside the non-vertical section of the powder tube. This allows for relatively accurate screening of lithium iron phosphate particles and powder, and graphite particles and powder, improving the screening efficiency of all four. Furthermore, other particulate materials and diaphragms are screened out by a reciprocating, angle-deflecting shaking screen frame. The continuous reciprocating deflection prevents other materials from clogging the shaking screen frame, maintaining a high-efficiency screening state for a long time and improving screening efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ;

[0027] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ;

[0028] Figure 3 This is a three-dimensional illustration of the present invention. Figure 3 ;

[0029] Figure 4 This is a three-dimensional illustration of the present invention. Figure 4 .

[0030] The diagram is marked as follows:

[0031] 1. Primary screening box; 2. Feeding chute; 3. Vertical dust suction chute; 4. Square to round joint; 5. Screening section; 51. Connecting flange pipe; 52. Screening box; 53. Bottom cover; 54. Telescopic cylinder; 55. Screening screen; 56. Discharge chute; 57. Raised edge; 6. Fan; 7. Powder pipe; 8. Shaking screen frame; 9. Reciprocating drive unit. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0033] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] like Figures 1 to 4 As shown, a primary screening assembly for recycling new energy power batteries includes a primary screening box 1 and a feeding chute 2 embedded in the top of the primary screening box 1. The primary screening assembly for recycling new energy power batteries also includes:

[0035] A vertical dust suction chute 3 is connected to the bottom of the feeding chute 2.

[0036] A square-connected circle 4 is horizontally connected to one of the vertical surfaces of the vertical vacuuming chute 3, and the square-connected circle 4 is connected to the middle of the vertical vacuuming chute 3.

[0037] The sieving section 5 is provided on the square-to-circular section 4. The sieving section 5 is used to separate lithium iron phosphate powder and graphite particles with large volume differences under the premise of small mass difference.

[0038] A suction fan 6 is installed on the primary screening box 1. A powder pipe 7 connects the suction port of the suction fan 6 and the screening section 5. A filter bag is installed at the connection between the suction fan 6 and the powder pipe 7 to filter and collect graphite powder. The end of the powder pipe 7 near the screening section 5 is a vertical pipe, and the end of the powder pipe 7 near the suction fan 6 is a curved pipe. The length of the vertical pipe is more than half of the total length of the powder pipe 7, and the height of the connection between the vertical pipe and the curved pipe is higher than the height of the top of the suction fan 6. This allows lithium iron phosphate powder and graphite particles, which are heavier than graphite powder, to sink back into the screening section 5, making it convenient to separate graphite particles and lithium iron phosphate powder according to size. After the airflow carries the graphite powder, graphite particles, and lithium iron phosphate powder into the vertical pipe, the powder pipe 7 is used to allow the lithium iron phosphate powder and graphite particles that have drifted into it to settle back into the screening section 5 under the influence of gravity.

[0039] like Figures 2 to 4 As shown, the screening unit 5 includes:

[0040] A detachable flange pipe 51 is installed at one end of the square-to-circular joint 4.

[0041] A screening box 52 is fixedly installed at one end of the connecting flange pipe 51, and one end of the powder pipe 7 is fixedly installed at the top of the screening box 52.

[0042] A tiltable and detachable screening screen 55 is installed inside the screening box 52.

[0043] The feeding chute 56 connected to the screening box 52 allows the suction fan 6 to draw away the air inside the vertical suction chute 3 through the powder pipe 7, screening box 52 and square-to-circle 4, and generate a negative pressure airflow in the middle of the vertical suction chute 3, so as to draw lithium iron phosphate powder, graphite powder and graphite particles into the screening box 52 and powder pipe 7, so as to facilitate the screening of the three.

[0044] like Figure 3 and Figure 4 As shown, the height of the top of the screening screen 55 is lower than the height of the bottom of the connecting flange pipe 51, and the top of the screening screen 55 is flush with the bottom of the inside of the discharge chute 56.

[0045] The screening section 5 also includes a protruding edge 57 fixed on the end face of the feeding slide 56. The protruding edge 57 is used to limit the suspension and collection bag. This design allows the screened graphite particles to slide smoothly and quickly under the action of gravity, reducing the negative pressure airflow from the docking flange pipe 51 into the screening box 52 from affecting the smoothness of the graphite particle feeding.

[0046] like Figures 2 to 4 As shown, the screening section 5 also includes a bottom cover 53 hinged to the bottom of the screening box 52. The screening box 52 is provided with a telescopic cylinder 54 for opening and closing the bottom cover 53, so that when the screening screen 55 screens out a large amount of lithium iron phosphate powder, the bottom cover 53 can be opened to facilitate the collection of lithium iron phosphate powder for subsequent reuse.

[0047] The two ends of the telescopic cylinder 54 are respectively hinged to the screening box 52 and the bottom cover 53. The telescopic cylinder 54 and the discharge slide 56 are respectively located on two adjacent vertical surfaces outside the screening box 52. The docking flange pipe 51 and the discharge slide 56 are respectively located on two opposite vertical surfaces outside the screening box 52. This design can avoid the bottom cover 53 from being disturbed by the discharge slide 56 and the docking flange pipe 51 when it is opened or closed. When screening lithium iron phosphate powder and graphite particles falling into the screening box 52, the graphite particles can slide further and further away from the docking flange pipe 51, reducing the impact of negative pressure airflow on the screening and sliding of graphite particles, so that the graphite particles can be smoothly discharged into the collection bag.

[0048] like Figures 1 to 3 As shown, the primary screening component for recycling new energy power batteries also includes:

[0049] Rotate the shaking screen frame 8 located inside the primary screening box 1, and the bottom of the vertical dust suction slide 3 is inserted into the top inside the shaking screen frame 8.

[0050] A reciprocating drive unit 9 is used to drive the shaking screen frame 8 to reciprocate. The reciprocating drive unit 9 includes a sector tooth fixedly mounted on one of the shaft ends of the shaking screen frame 8 and a support platform fixedly mounted outside the primary screening box 1. A reciprocating screw is rotatably mounted on the support platform. A sliding seat is sleeved on the outside of the reciprocating screw. The top of the sliding seat is a toothed surface. The toothed surface of the sliding seat meshes with the toothed surface of the sector tooth. This is used to drive the reciprocating screw to rotate the drive motor, so as to drive the shaking screen frame 8 to reciprocate within a fixed deflection angle. This ensures that the fragments falling into the shaking screen frame 8 will always move relative to the shaking screen frame 8. While separating the diaphragm sheet and other fragments, it can also reduce the probability of the screen holes of the shaking screen frame 8 being blocked, and can keep the shaking screen frame 8 in a high screening state for a long time.

[0051] Working principle: First, the suction fan 6 and reciprocating drive unit 9 are started, which draw air from inside the vertical suction chute 3 through the dust pipe 7, screening box 52, and square-to-circular joint 4. This creates a negative pressure airflow in the middle of the vertical suction chute 3, flowing towards the screening box 52. The pulverized electrode fragments of the new energy power battery are fed into the feeding chute 2 and slide into the vertical suction chute 3. The fragments undergo free fall within the vertical suction chute 3. Larger lithium iron phosphate particles fall directly into the shaking screen frame 8, while smaller graphite particles, lithium iron phosphate powder, and graphite powder are carried by the negative pressure airflow into the screening box 52. Since the vertical cross-section of the screening box 52 is larger than that of the connecting flange pipe 51, the flow rate of the negative pressure airflow slows down after entering the screening box 52, causing the relatively larger graphite particles and some lithium iron phosphate powder to settle. The material falls to the top of the screening screen 55 and, under the action of gravity, slides along the inclined direction of the screening screen 55 and the discharge slide 56 into the collection bag suspended on the protruding edge 57. Graphite powder, smaller graphite particles, and some lithium iron phosphate powder with smaller mass and volume will enter the vertical tube with the airflow. As the height inside the vertical tube increases, the airflow velocity will decrease, and with the action of gravity, the lithium iron phosphate powder and smaller graphite particles will settle back into the screening box 52. Under the screening of the screening screen 55, the graphite particles slide into the collection bag, the lithium iron phosphate powder will pass through the mesh of the screening screen 55 and fall onto the bottom cover 53, and the graphite powder will settle inside the filter bag inside the curved tube and the suction fan 6. In this way, lithium iron phosphate particles, graphite particles, lithium iron phosphate powder, and graphite powder can be gradually screened out, improving the screening accuracy of the four and avoiding mutual mixing, which would affect the subsequent recycling effect.

[0052] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0053] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A primary screening assembly for recycling new energy power batteries, comprising a primary screening box (1) and a feeding chute (2) embedded in the top of the primary screening box (1), characterized in that, The primary screening component for recycling new energy power batteries also includes: A vertical dust suction chute (3) connected to the bottom of the feeding chute (2); A square-to-circle (4) is horizontally connected to one of the vertical surfaces of the vertical dust suction chute (3); A sieving section (5) is provided on the square circle (4). The sieving section (5) is used to sieve out lithium iron phosphate powder and graphite particles with large volume differences under the premise of small mass difference. A suction fan (6) is installed on the primary screening box (1). A powder pipe (7) is connected between the suction port of the suction fan (6) and the screening section (5). The end of the powder pipe (7) near the screening section (5) is a vertical tube. The powder pipe (7) is used to cause the lithium iron phosphate powder and graphite particles that float into it to settle back into the screening section (5) under the influence of gravity.

2. The primary screening component for recycling new energy power batteries according to claim 1, characterized in that, The screening section (5) includes: A detachable flange pipe (51) is installed at one end of the square joint (4); A sieve box (52) is fixedly installed at one end of the docking flange pipe (51), and one end of the powder pipe (7) is fixedly installed at the top of the sieve box (52); A tilting and detachable screening screen (55) is installed inside the screening box (52); Connect to the discharge chute (56) provided on the screening box (52).

3. The primary screening component for recycling new energy power batteries according to claim 2, characterized in that, The top of the screening mesh (55) is lower than the bottom of the docking flange pipe (51), and the top of the screening mesh (55) is flush with the bottom of the material feeding chute (56).

4. The primary screening component for recycling new energy power batteries according to claim 3, characterized in that, The connecting flange pipe (51) and the discharge slide (56) are located on two opposite vertical surfaces outside the screening box (52).

5. The primary screening component for recycling new energy power batteries according to claim 4, characterized in that, The screening section (5) also includes a protruding edge (57) fixedly disposed on the end face of the feeding chute (56), the protruding edge (57) being used to limit the suspension of the collection bag.

6. The primary screening component for recycling new energy power batteries according to claim 5, characterized in that, The screening section (5) also includes a bottom cover (53) hinged to the bottom of the screening box (52), and the screening box (52) is provided with a telescopic cylinder (54) for opening and closing the bottom cover (53).

7. The primary screening component for recycling new energy power batteries according to claim 6, characterized in that, The two ends of the telescopic cylinder (54) are respectively hinged to the screening box (52) and the bottom cover (53), and the telescopic cylinder (54) and the discharge slide (56) are respectively located on two adjacent vertical surfaces outside the screening box (52).

8. The primary screening component for recycling new energy power batteries according to claim 7, characterized in that, The primary screening component for recycling new energy power batteries also includes: Rotate the shaking screen frame (8) located inside the primary screening box (1), and the bottom of the vertical dust suction slide (3) is inserted into the top inside the shaking screen frame (8); A reciprocating drive unit (9) for driving the shaking screen frame (8) to reciprocate.

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