Solid-liquid separation equipment for recycling waste lithium battery

Abstract

The invention relates to the technical field of waste battery recovery, in particular to solid-liquid separation equipment for waste lithium battery recovery, which comprises a barrel, the top of the barrel is connected with a hopper, the upper part in the barrel is rotatably connected with a circular plate, and the circular plate is rotatably connected with filter cartridges at uniform intervals along the circumferential direction; a filter bag of which the top and the bottom are open is connected into the filter cylinder; and a driving mechanism for driving the circular plate and the filter cylinder to rotate is arranged on the cylinder body. By arranging a plurality of filter cartridges, mutual accumulation of a large number of battery solid particles can be reduced, so that the solid-liquid separation efficiency and effect can be improved; solid materials can be blocked through the filter bag and are prevented from entering the filter holes of the filter cartridge, so that the filter cartridge can be prevented from being blocked, and the solid-liquid separation efficiency and effect can be further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste battery recycling, and particularly to a solid-liquid separation device for recycling waste lithium batteries. Background Art

[0002] Lithium batteries are widely used in industries such as transportation, communication, electric power, and railway. Among them, automotive starting batteries, power batteries for electric bicycles, and backup power supplies account for more than 90% of the total consumption. In recent years, with the increase in automotive consumption, the usage of automotive lithium batteries has increased sharply, resulting in more than 3 million tons of waste lithium batteries generated annually. Waste lithium batteries are corrosive dangerous goods, containing a large amount of heavy metal lead and high-concentration sulfuric acid solution. If not effectively recycled and scientifically treated, they will surely pose a serious threat to organisms and the environment. In order to protect the environment, recycle resources, improve economic benefits, and fulfill social responsibilities, it is necessary to effectively recycle and utilize waste lithium batteries.

[0003] The steps for recycling and treating waste lithium batteries are: pretreatment - crushing - screening - solid-liquid separation - liquid treatment - solid recovery. Solid-liquid separation is one of the key steps, and its main purpose is to separate the solid components from the liquid components in the battery for subsequent treatment and resource recovery. Currently, generally, a tubular centrifuge (also known as a centrifugal separator) is used to separate battery solid particles from the liquid. However, the existing tubular centrifuge separates battery solid particles from the liquid through a relatively large sieve drum, resulting in a large number of battery solid particles accumulating on each other inside the sieve drum, thus leading to a low solid-liquid separation efficiency, and the solid-liquid separation efficiency and effect are not ideal. Summary of the Invention

[0004] The purpose of the present invention is to provide a solid-liquid separation device for recycling waste lithium batteries, aiming to improve the solid-liquid separation efficiency and effect.

[0005] To achieve the above object, the present invention provides the following technical solution: A solid-liquid separation device for recycling waste lithium batteries, comprising a cylinder body, a hopper is connected to the top of the cylinder body, a circular plate is rotatably connected to the upper part inside the cylinder body, filter cylinders are rotatably connected to the circular plate at equal intervals along the circumferential direction, the top and bottom of the filter cylinders are both open, a filter bag with open top and bottom is connected inside the filter cylinder, a driving mechanism for driving the circular plate and the filter cylinders to rotate is provided on the cylinder body, a material guiding frame for guiding materials into the filter cylinders is connected to the upper part inside the cylinder body, the bottom of the material guiding frame contacts the top of the circular plate to push the materials falling on the circular plate into the filter cylinders, a liquid receiving cylinder with an open top is connected to the bottom inside the cylinder body, a conical filter screen is connected to the top of the liquid receiving cylinder, a drain pipe is communicated with the bottom of the liquid receiving cylinder and extends outside the cylinder body, a cross plate is connected inside the cylinder body, a material blocking frame located below the filter cylinders is rotatably connected to the cross plate, the material blocking frame is used to block solid materials inside the filter cylinders, a pushing frame for pushing the material blocking frame to rotate is connected to the bottom of the circular plate, and a hinged opening and closing door is provided at the lower part of the side wall of the cylinder body.

[0006] Preferably, the material blocking frame includes a circular plate rotatably connected to the cross plate, the circular plate is located below the filter cylinders, sieve meshes are embedded and installed at equal intervals along the circumferential direction on the circular plate, the sieve meshes are used to block solid materials inside the filter cylinders, discharge openings are opened at equal intervals along the circumferential direction on the circular plate, and each discharge opening is located between two adjacent sieve meshes.

[0007] Preferably, the pushing frame includes a connecting rod and a connecting ring. Connecting rods are connected to the bottom of the circular plate at equal intervals along the circumferential direction, the connecting rods are located outside the filter cylinders, a connecting ring is connected between the bottom ends of the connecting rods, the connecting ring is located above the circular plate, sliding sleeves are connected to the outer wall of the connecting ring at equal intervals along the circumferential direction, electromagnets are installed at equal intervals along the circumferential direction on the top of the connecting ring, the electromagnets are located above the sliding sleeves, iron plugs are slidably connected inside the sliding sleeves, and insertion holes adapted to the iron plugs are opened at equal intervals along the circumferential direction on the top of the circular plate.

[0008] Preferably, the driving mechanism includes a gear ring connected inside the cylinder body, the gear ring is located below the circular plate, a spur gear is connected to the upper part of the outer wall of the filter cylinder, the spur gear meshes with the gear ring, and a motor I is installed on the outer wall of the cylinder body, and the output shaft of the motor I is in transmission connection with the circular plate to drive the circular plate to rotate.

[0009] Preferably, a material receiving mechanism is provided on the cylinder body, and the material receiving mechanism is used to receive the solid materials discharged from the filter cylinders. The material receiving mechanism includes a box body connected to the lower part of the side wall of the cylinder body, the box body is communicated with the cylinder body, a box door is hinged to the side of the box body facing away from the cylinder body, a receiving plate is slidably arranged at the bottom inside the box body, and a rodless cylinder is installed at the bottom inside the box body, and the slider on the rodless cylinder is connected to the receiving plate to drive the receiving plate to move into the cylinder body for receiving materials.

[0010] Preferably, a fixing plate is connected to the lower part inside the conical filter screen, a motor II is installed on the fixing plate, and a brush for cleaning the conical filter screen is connected to the output shaft of the motor II.

[0011] Preferably, electric push rods are installed at intervals along the circumferential direction at the top of the cylinder body. The electric push rods penetrate through the hopper, and a scraper is connected to the telescopic rods of the electric push rods. The scraper is used to scrape off the solid materials adhering to and staying on the filter bags.

[0012] Preferably, an electric rotating rod is provided in the upper part of the cylinder body, and a blocking block for blocking the discharge port of the hopper is connected to the electric rotating rod.

[0013] The beneficial effects of the present invention have the following advantages compared with the prior art: 1. By arranging a plurality of filter cartridges, the mutual accumulation of a large number of battery solid particles can be reduced, thereby improving the solid-liquid separation efficiency and effect.

[0014] 2. The filter bag can block solid materials and prevent the solid materials from entering the filter holes of the filter cartridges, thereby preventing the filter cartridges from being blocked and further improving the solid-liquid separation efficiency and effect.

[0015] 3. The motor II can drive the brush to rotate and clean the conical filter screen, avoiding the blockage of the conical filter screen, thereby further improving the solid-liquid separation efficiency and effect.

[0016] 4. The electric push rod can drive the scraper to move downwards to scrape off the solid materials adhering to the filter bags, realizing automatic cleaning of the filter bags, avoiding the blockage of the filter bags, maintaining the permeability of the filter bags, and further improving the solid-liquid separation efficiency and effect.

[0017] 5. The electric rotating rod can automatically drive the blocking block to open and close. The blocking block can block the discharge port of the hopper to seal the cylinder body, ensure the sealing performance of the cylinder body, prevent the materials from being thrown upwards from the cylinder body during the solid-liquid separation process, and avoid material loss and environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0019] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0020] Figure 3 It is an installation schematic diagram of the magnetic block and the opening and closing door of the present invention.

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the conical filter screen, the fixing plate, the motor II and the brush of the present invention.

[0022] Figure 5 It is an installation schematic diagram of the material guiding frame, the cross plate, the material blocking frame and the pushing frame of the present invention.

[0023] Figure 6This is a three-dimensional structural schematic diagram of the material guiding frame, horizontal plate, material blocking frame and pushing frame of the present invention.

[0024] Figure 7 This is a three-dimensional structural schematic diagram of the material blocking frame and pushing frame of the present invention.

[0025] Figure 8 This is a three-dimensional structural schematic diagram of the driving mechanism of the present invention.

[0026] Figure 9 This is a three-dimensional structural schematic diagram of the material receiving mechanism of the present invention.

[0027] Reference numerals in the figure: 1 - cylinder body, 01 - cylinder one, 02 - cylinder two, 03 - cylinder three, 04 - material guiding ring, 2 - hopper, 3 - round plate, 4 - filter cylinder, 41 - filter bag, 5 - material guiding frame, 51 - pushing plate, 52 - conical plate, 6 - liquid receiving cylinder, 7 - conical filter screen, 71 - conical plate, 72 - filter screen, 73 - liquid discharge groove, 8 - liquid discharge pipe, 9 - opening and closing door, 10 - magnetic block, 11 - horizontal plate, 12 - material blocking frame, 121 - circular plate, 122 - screen, 123 - discharge port, 124 - jack, 13 - pushing frame, 131 - connecting rod, 132 - connecting ring, 133 - sliding sleeve, 134 - electromagnet, 135 - iron plug, 141 - gear ring, 142 - spur gear, 143 - motor one, 144 - belt drive assembly, 151 - box body, 152 - box door, 153 - rodless cylinder, 154 - material receiving plate, 1541 - inclined plate, 1542 - through port, 1543 - arc-shaped pushing plate, 16 - electric rotating rod, 17 - blocking block, 18 - fixing plate, 19 - motor two, 20 - brush, 21 - electric push rod, 22 - scraper. Detailed implementation manners

[0028] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0029] Please refer to Figures 1-7, A solid-liquid separation device for recycling waste lithium batteries, including a cylinder body 1. The cylinder body 1 includes a first cylinder 01, a second cylinder 02, a third cylinder 03, and a feed guiding ring 04. The second cylinder 02 is connected to the top of the first cylinder 01 and communicates with the first cylinder 01. The diameter of the second cylinder 02 is smaller than that of the first cylinder 01. The third cylinder 03 is connected to the upper inner part of the second cylinder 02 and communicates with the second cylinder 02. The top of the third cylinder 03 is provided with a feed inlet. The inner bottom of the first cylinder 01 is connected with a feed guiding ring 04. The top of the feed guiding ring 04 is an inclined surface that is lower on the left and higher on the right. A hinged opening and closing door 9 that can be rotated to the left to open is provided on the left side of the first cylinder 01. The production material of the opening and closing door 9 is iron. A magnetic block 10 is connected to the outer wall on the left side of the first cylinder 01. The magnetic block 10 is located behind the opening and closing door 9 and contacts the opening and closing door 9. The iron opening and closing door 9 can be attracted and fixed by the magnetic block 10 to prevent the opening and closing door 9 from being pushed open by solid materials. A hopper 2 is connected to the inner top of the third cylinder 03. A circular plate 3 is rotatably connected to the upper inner part of the second cylinder 02 through an annular chute. The circular plate 3 is located below the third cylinder 03. Four filter cylinders 4 are rotatably connected to the circular plate 3 along the circumference at equal intervals through bearings. The top and bottom of the filter cylinder 4 are both open. A driving mechanism for driving the circular plate 3 and the filter cylinders 4 to rotate is provided on the second cylinder 02. A filter bag 41 is connected inside the filter cylinder 4. The top and bottom of the filter bag 41 are both open. A feed guiding frame 5 for guiding materials into the filter cylinder 4 is connected to the lower inner part of the third cylinder 03. The feed guiding frame 5 includes four pushing plates 51 and a conical plate 52. Four pushing plates 51 are connected to the lower inner part of the third cylinder 03 along the circumference at equal intervals. A conical plate 52 located directly below the hopper 2 is connected between the four pushing plates 51. The bottoms of the pushing plates 51 and the conical plate 52 both contact the top of the circular plate 3. A liquid receiving cylinder 6 with an open top is connected to the inner bottom of the cylinder body 1. The diameter of the liquid receiving cylinder 6 is larger than that of the second cylinder 02. The liquid receiving cylinder 6 is located inside the feed guiding ring 04 and is in close contact with the feed guiding ring 04. A drain pipe 8 is connected to the bottom of the liquid receiving cylinder 6 and extends outside the first cylinder 01. A conical filter screen 7 is connected to the top of the liquid receiving cylinder 6. The conical filter screen 7 includes a conical plate 71 and a filter screen 72. The conical plate 71 is connected to the top of the liquid receiving cylinder 6. The filter screen 72 is embedded and installed on the conical plate 71 along the circumference at equal intervals. Two arc-shaped liquid discharge grooves 73 are spaced along the circumference on the conical plate 71. The liquid discharge grooves 73 are located below the filter screen 72. A cross plate 11 is connected inside the second cylinder 02. A material blocking frame 12 located below the filter cylinder 4 is rotatably connected to the cross plate 11 through a rotating shaft. The material blocking frame 12 is used to block solid materials inside the filter cylinder 4. A pushing frame 13 for pushing the material blocking frame 12 to rotate is connected to the bottom of the circular plate 3. The material blocking frame 12 includes a circular plate 121 connected to the rotating shaft of the cross plate 11. The circular plate 121 is located below the filter cylinder 4. Four screen meshes 122 are embedded and installed on the circular plate 121 along the circumference at equal intervals. The four screen meshes 122 are respectively located below the four filter cylinders 4. The screen meshes 122 are used to block solid materials inside the filter cylinder 4.Four discharge ports 123 are evenly spaced circumferentially on the circular plate 121. Each discharge port 123 is located between two adjacent screen meshes 122. The pushing frame 13 includes a connecting rod 131 and a connecting ring 132. Four connecting rods 131 are evenly spaced circumferentially and connected to the bottom of the circular plate 3. The connecting rods 131 are located outside the filter cartridge 4. A connecting ring 132 is connected between the bottoms of the four connecting rods 131. The connecting ring 132 is located above the circular plate 121. Four sliding sleeves 133 are evenly spaced circumferentially and connected to the outer wall of the connecting ring 132. Four electromagnets 134 are evenly spaced circumferentially and installed on the top of the connecting ring 132. The four electromagnets 134 are respectively located above the four sliding sleeves 133. Iron rods 135 are slidably connected in the four sliding sleeves 133. Four insertion holes 124 adapted to the iron rods 135 are evenly spaced circumferentially and opened on the top of the circular plate 121.,

[0030] Please refer to Figure 8 , the driving mechanism includes a gear ring 141 connected inside the second cylinder 02. The gear ring 141 is located below the circular plate 3 and outside the connecting rod 131. A spur gear 142 is connected to the upper part of the outer wall of the filter cartridge 4. The spur gear 142 meshes with the gear ring 141. A first motor 143 is installed on the rear side of the outer wall of the cylinder body 1. The output shaft of the first motor 143 is drivingly connected to the circular plate 3 through a belt drive assembly 144. The belt drive assembly 144 consists of a small pulley, a large pulley and a belt. The small pulley is connected to the output shaft of the first motor 143. The large pulley is connected to the side wall of the circular plate 3. The belt is sleeved between the small pulley and the large pulley.

[0031] Please refer to Figure 2 and Figure 9 , a material receiving mechanism is provided on the left side of the second cylinder 02. The material receiving mechanism is used to receive the solid materials discharged from the filter cartridge 4. The material receiving mechanism includes a box body 151 connected to the lower left part of the second cylinder 02. The box body 151 is communicated with the second cylinder 02. A box door 152 is hinged on the left side of the box body 151. A receiving plate 154 is slidably arranged at the inner bottom of the box body 151. The receiving plate 154 includes an inclined plate 1541 and an arc-shaped pushing plate 1543. The inclined plate 1541 is slidably arranged at the inner bottom of the box body 151. A through hole 1542 for discharging liquid is opened on the inclined plate 1541. The bottom of the inclined plate 1541 is connected with an arc-shaped pushing plate 1543. The bottom of the arc-shaped pushing plate 1543 contacts with the inner bottom of the box body 151. A rodless cylinder 153 is installed on the front side of the inner bottom of the box body 151. The slider on the rodless cylinder 153 is connected to the inclined plate 1541.

[0032] The waste lithium battery materials after crushing and screening are poured into the cylinder body 1 through the hopper 2. The conical plate 52 can guide the materials into the filter cylinder 4. The solid materials can be blocked in the filter cylinder 4 by the screen 122 on the baffle rack 12, while the liquid falls through the screen 122 onto the conical filter screen 7. The filter screen 72 on the conical filter screen 7 can block the solid materials, and the liquid falls through the filter screen 72 and the liquid discharge groove 73 into the liquid receiving cylinder 6. The liquid in the liquid receiving cylinder 6 is discharged outward through the liquid discharge pipe 8. Connecting an external liquid extraction pump to the liquid discharge pipe 8 can transport the liquid to the next process. Control the operation of the first motor 143. The circular plate 3 can be driven to rotate through the belt transmission assembly 144. The rotation of the circular plate 3 drives the filter cylinder 4 and the push rack 13 to rotate. When the filter cylinder 4 rotates, it drives the spur gear 142 to rotate along the gear ring 141. Under the meshing action of the spur gear 142 and the gear ring 141, the spur gear 142 drives the filter cylinder 4 to rotate self - sufficiently, realizing the centrifugal separation of solids and liquids. Since there are four filter cylinders 4, it can reduce the mutual accumulation of a large number of battery solid particles, thereby improving the efficiency and effect of solid - liquid separation. When the push rack 13 rotates, the iron plug 135 on it pushes the circular plate 121 with the screen 122 to rotate, ensuring that the screen 122 rotates synchronously with the filter cylinder 4 during the solid - liquid separation operation, so as to ensure that the screen 122 keeps blocking the solid materials in the filter cylinder 4. When the circular plate 3 rotates, the material falling on the circular plate 3 can be pushed into the filter cylinder 4 through the pushing plate 51, preventing the material from remaining on the circular plate 3. The filter bag 41 can block the solid materials, preventing the solid materials from entering the filter holes of the filter cylinder 4, thereby preventing the blockage of the filter cylinder 4 and further improving the efficiency and effect of solid - liquid separation. The fine solid materials and liquid thrown out from the filter cylinder 4 fall onto the conical filter screen 7. The liquid falls through the filter screen 72 and the arc - shaped liquid discharge groove 73 into the liquid receiving cylinder 6. The arc - shaped liquid discharge groove 73 can greatly accelerate the speed of the liquid falling into the liquid receiving cylinder 6. The fine solid materials are blocked by the conical plate 71 and the filter screen 72, and then the fine solid materials slide along the conical plate 71 and the filter screen 72 onto the guide ring 04. The fine solid materials are guided to the left by the inclined plane at the top of the guide ring 04. Opening the opening and closing door 9 can clean the fine solid materials.

[0033] After the solid-liquid separation operation is completed, the rodless cylinder 153 is first controlled to drive the receiving plate 154 to move rightward into the cylinder 202, and the liquid thrown into the box 151 can be pushed rightward back into the cylinder 202 through the arc-shaped push plate 1543 on the receiving plate 154, so as to prevent a large amount of liquid from accumulating and staying in the box 151. Then, the electromagnet 134 is controlled to be energized, and the electromagnet 134 generates magnetic force after being energized, and uses the magnetic force to absorb the iron plug rod 135, so that the iron plug rod 135 moves upward from the socket 124 on the circular plate 121, and the lock between the push frame 13 and the material blocking frame 12 is released, and then the motor 143 is controlled to rotate, so that the circular plate 3 drives the filter cartridge 4 and the push frame 13 to rotate, and the filter cartridge 4 is then separated from the screen 122 and aligned with the discharge port 123, so that the solid material in the filter cartridge 4 is discharged downward. The solid material then falls onto the inclined plate 1541 of the receiving plate 154, and slides leftward along the inclined plate 1541 into the box body 151, preventing the solid material from falling onto the conical filter screen 7 and being stained with liquid again, thereby significantly improving the purity and efficiency of solid-liquid separation. After all the solid material in the filter cartridge 4 is discharged downward, the motor 143 is first controlled to rotate so that the circular plate 3 drives the filter cartridge 4 and the push frame 13 to rotate, and the filter cartridge 4 rotates and disengages from the discharge port 123 and realigns with the screen 122, and the iron rod 135 on the push frame 13 rotates and aligns with the socket 124, and then the electromagnet 134 is controlled to be powered off, and the iron rod 135 is then inserted downward into the socket 124 under the action of its own gravity, thereby locking the push frame 13 and the material blocking frame 12 together again. At the same time, the rodless cylinder 153 is controlled to drive the receiving plate 154 to move out of the cylinder 202 to the left, and the box door 152 is opened. The receiving plate 154 then pushes the solid material in the box body 151 to the left, and a collection container is placed under the box body 151 to collect the pushed solid material.

[0034] See also Figure 4 A fixing plate 18 is connected to the lower inner portion of the conical plate 71, a motor 19 is mounted on the fixing plate 18, and a brush 20 for cleaning the filter screen 72 is connected to the output shaft of the motor 19, and the shape of the brush 20 is an inverted V shape.

[0035] The control motor 2 19 drives the brush 20 to rotate. The rotation of the brush 20 can clean the filter screen 72 and avoid clogging of the filter screen 72, thereby further improving the solid-liquid separation efficiency and effect.

[0036] See also Figure 2 and Figure 5 Four electric push rods 21 are embedded and installed at intervals along the circumferential direction on the top of the cylinder 303. The electric push rods 21 penetrate the hopper 2. A scraper 22 is connected to the telescopic rod of the electric push rod 21. The scraper 22 is annular in shape. The four scrapers 22 correspond to the four filter bags 41 one by one. The scraper 22 is used to scrape off the solid materials adhering to the filter bags 41.

[0037] Control the electric push rod 21 to drive the scraper 22 to move downward into the filter bag 41. The downward movement of the scraper 22 can scrape off the solid materials adhered to the filter bag 41, realizing the automatic cleaning of the filter bag 41, avoiding the blockage of the filter bag 41, and maintaining the permeability of the filter bag 41. Thus, the solid-liquid separation efficiency and effect can be further improved. After the cleaning of the filter bag 41 is completed, control the electric push rod 21 to drive the scraper 22 to move upward and out of the filter bag 41.

[0038] Please refer to Figures 1-2 As shown in the figure, an electric rotating rod 16 is provided on the cylinder three 03. The electric rotating rod 16 includes a stepping motor and a rotating rod. The rotating rod is rotatably connected to the cylinder three 03. The rotating rod penetrates through the hopper 2. The stepping motor is installed on the upper part of the front side of the outer wall of the cylinder two 02. The output shaft of the stepping motor is connected to the rotating rod. A blocking block 17 located inside the hopper 2 is connected to the rotating rod. The blocking block 17 is used to block the discharge port of the hopper 2.

[0039] When feeding is required, control the electric rotating rod 16 to drive the blocking block 17 to rotate and open. After the feeding is completed, control the electric rotating rod 16 to drive the blocking block 17 to rotate and close, thereby blocking the discharge port of the hopper 2 to seal the cylinder body 1, ensuring the sealing performance of the cylinder body 1, preventing the materials from being thrown upward from the cylinder body 1 during the solid-liquid separation process, and avoiding the loss of materials and environmental pollution.

[0040] The above embodiments only represent the preferred implementation modes of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, improvements and substitutions can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A solid-liquid separation device for recycling waste lithium batteries, comprising a cylinder body (1), and a hopper (2) is connected to the top of the cylinder body (1), characterized in that, Inside the cylinder body (1), a circular plate (3) is rotatably connected to the upper part. Along the circumference, filter cartridges (4) are evenly spaced and rotatably connected to the circular plate (3). The top and bottom of the filter cartridge (4) are both open. Inside the filter cartridge (4), a filter bag (41) with both the top and bottom open is connected. On the cylinder body (1), there is a driving mechanism for driving the circular plate (3) and the filter cartridges (4) to rotate. Inside the upper part of the cylinder body (1), a material guiding frame (5) for guiding materials into the filter cartridges (4) is connected. The bottom of the material guiding frame (5) contacts the top of the circular plate (3) to push the materials falling on the circular plate (3) into the filter cartridges (4). At the inner bottom side of the cylinder body (1), a liquid receiving cylinder (6) with an open top is connected. At the top of the liquid receiving cylinder (6), a conical filter screen (7) is connected. At the bottom of the liquid receiving cylinder (6), a drain pipe (8) is connected and extends outside the cylinder body (1). Inside the cylinder body (1), a horizontal plate (11) is connected. On the horizontal plate (11), a material blocking frame (12) located below the filter cartridges (4) is rotatably connected. The material blocking frame (12) is used to block solid materials inside the filter cartridges (4). At the bottom of the circular plate (3), a pushing frame (13) for pushing the material blocking frame (12) to rotate is connected. At the lower part of the side wall of the cylinder body (1), an opening and closing door (9) is hinged.

2. The solid-liquid separation device for recycling waste lithium batteries according to claim 1, wherein, The material blocking frame (12) includes a circular plate (121) rotatably connected to the horizontal plate (11). The circular plate (121) is located below the filter cartridges (4). Along the circumference, sieve meshes (122) are embedded and installed on the circular plate (121). The sieve meshes (122) are used to block solid materials inside the filter cartridges (4). Along the circumference, discharge openings (123) are spaced on the circular plate (121). Each discharge opening (123) is located between two adjacent sieve meshes (122).

3. The solid-liquid separation device for recycling waste lithium batteries according to claim 2, wherein, The pushing frame (13) includes a connecting rod (131) and a connecting ring (132). Along the circumference, connecting rods (131) are connected to the bottom of the circular plate (3). The connecting rods (131) are located outside the filter cartridges (4). Between the bottom ends of the connecting rods (131), a connecting ring (132) is connected. The connecting ring (132) is located above the circular plate (121). Along the circumference, sliding sleeves (133) are connected to the outer wall of the connecting ring (132). Along the circumference, electromagnets (134) are installed on the top of the connecting ring (132). The electromagnets (134) are located above the sliding sleeves (133). Inside the sliding sleeves (133), iron rods (135) are slidably connected. Along the circumference, insertion holes (124) adapted to the iron rods (135) are spaced on the top of the circular plate (121).

4. The solid-liquid separation device for recycling waste lithium batteries according to claim 3, characterized in that, The driving mechanism includes a gear ring (141) connected inside the cylinder body (1). The gear ring (141) is located below the circular plate (3). On the upper part of the outer wall of the filter cartridge (4), a spur gear (142) is connected. The spur gear (142) meshes with the gear ring (141). On the outer wall of the cylinder body (1), a first motor (143) is installed. The output shaft of the first motor (143) is in transmission connection with the circular plate (3) to drive the circular plate (3) to rotate.

5. The solid-liquid separation device for recycling waste lithium batteries according to claim 4, characterized in that, A material receiving mechanism is provided on the cylinder body (1). The material receiving mechanism is used to receive the solid materials discharged from the filter cartridge (4). The material receiving mechanism includes a box body (151) connected to the lower part of the side wall of the cylinder body (1). The box body (151) is communicated with the cylinder body (1). A box door (152) is hinged to the side of the box body (151) facing away from the cylinder body (1). A material receiving plate (154) is slidably arranged at the inner bottom of the box body (151). A rodless cylinder (153) is installed at the inner bottom of the box body (151). The slider on the rodless cylinder (153) is connected to the material receiving plate (154) to drive the material receiving plate (154) to move into the cylinder body (1) for receiving materials.

6. The solid-liquid separation device for recycling waste lithium batteries according to claim 1, characterized in that, A fixing plate (18) is connected to the lower part inside the conical filter screen (7). A second motor (19) is installed on the fixing plate (18). A brush (20) for cleaning the conical filter screen (7) is connected to the output shaft of the second motor (19).

7. A solid-liquid separation device for recycling waste lithium batteries according to claim 1, characterized in that, Electric push rods (21) are installed at the top of the cylinder body (1) at circumferential intervals. The electric push rods (21) penetrate through the hopper (2). A scraping plate (22) is connected to the telescopic rods of the electric push rods (21). The scraping plate (22) is used to scrape off the solid materials adhering to and staying on the filter bag (41).

8. A solid-liquid separation device for recycling waste lithium batteries according to claim 1, characterized in that, An electric rotating rod (16) is provided at the upper part of the cylinder body (1). A blocking block (17) for blocking the discharge port of the hopper (2) is connected to the electric rotating rod (16).

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