Electrode material recycling and separation system

Abstract

The application discloses an electrode material recycling and separating system, which comprises a cleaning tank for cleaning active substances, wherein the cleaning tank is connected with a transfer tank through a rotary filter and a cleaning tank diaphragm pump; the transfer tank is connected with a horizontal screw centrifuge through a magnetic filter and a screw pump; the horizontal screw centrifuge is connected with a slurry recycling tank and an NMP buffer tank respectively, and the NMP buffer tank is connected with an NMP recycling tank through an NMP buffer tank diaphragm pump; the NMP recycling tank is connected with the cleaning tank through an NMP recycling tank diaphragm pump; the cleaning tank is connected with a heating bag through a hot air pipeline, and the cleaning tank is also connected with an exhaust fan through an exhaust pipeline; the cleaning tank is connected with an NMP waste gas recycling tower through a centrifugal fan and an NMP tail gas pipeline; the application greatly reduces the labor intensity, avoids the harm of harmful solvent NMP to personnel, and improves the cleaning effect of electrode pieces and the slurry recycling efficiency.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery technology, and in particular to an electrode material recycling and separation system. Background Technology

[0002] To avoid waste of lithium battery raw materials at various stages of production, it is necessary not only to improve processes and increase raw material utilization, but also to recycle scrap materials. Current electrode scrap recycling processes involve manually cleaning the scrap materials. A simple water storage tank is purchased, and the electrode material to be cleaned is manually placed into the tank. Then, the cleaning solvent NMP is manually added, and a stick is used to stir the material to improve the cleaning effect. The material is then left to stand for 12 hours. After standing, the NMP solution is scooped out manually, and then the cleaned electrode waste is removed using pliers. The remaining sediment is the recycled slurry, which is then manually filtered to obtain the final material.

[0003] The authorized announcement number CN209217150U discloses a device for separating waste lithium battery electrode sheets, including a cutting module, a purification module, a stirring module, and a screening module. The cutting module is equipped with a cutting mechanism that can cut waste batteries into pieces. The upper and lower parts of the cutting module are also equipped with a purification module and a settling module. The right side of the cutting module is equipped with a stirring module and a screening module.

[0004] The above technical solution achieves the separation of electrode sheets in waste lithium batteries, reduces labor costs, and effectively recycles waste gas substances during the separation process, thus improving the electrode sheet separation and recycling rate; however, it cannot further refine the separation and recycling of electrode materials. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides an electrode material recovery and separation system.

[0006] The technical solution of the present invention is as follows: an electrode material recovery and separation system, characterized in that it includes a cleaning tank for cleaning active substances, wherein the cleaning tank is connected to a transfer tank via a diaphragm pump and a rotary filter; the transfer tank is connected to a horizontal screw centrifuge via a screw pump and a magnetic filter; the horizontal screw centrifuge is connected to a slurry recovery tank and an NMP buffer tank respectively, the NMP buffer tank is connected to the NMP recovery tank via an NMP buffer tank diaphragm pump; the NMP recovery tank is connected to the cleaning tank via an NMP recovery tank diaphragm pump; the cleaning tank is connected to a heating pack via a hot air duct, and the cleaning tank is also connected to an exhaust fan via an exhaust duct; the cleaning tank is connected to an NMP exhaust gas recovery tower via an NMP exhaust gas duct and a centrifugal fan.

[0007] Furthermore, the cleaning tank includes a cleaning tank body and a cleaning tank cover; the cleaning tank body is fixed above the loading and unloading platform, the loading and unloading platform is fixed with a cleaning tank stirring motor, the cleaning tank stirring main shaft is provided in the middle of the cleaning tank body, the cleaning tank stirring main shaft passes through the bottom of the cleaning tank body to the loading and unloading platform, the cleaning tank stirring motor drives the cleaning tank transmission chain to drive the cleaning tank stirring main shaft to rotate; a cleaning tank stirring main shaft support bearing for limiting position and a cleaning tank mechanical seal sealing assembly for sealing are fixed below the cleaning tank stirring main shaft, and a cleaning tank main shaft support seat for limiting position is fixed above the cleaning tank stirring main shaft; an electrode material frame is provided inside the cleaning tank and fixed to the cleaning tank stirring main shaft, and an anti-settling stirring paddle of the cleaning tank located on the electrode material frame is fixed on the cleaning tank stirring main shaft.

[0008] Furthermore, the cleaning tank is fixed with cleaning tank cover clamping cylinders on both sides for clamping the cleaning tank cover; a safety valve for depressurizing the cleaning tank is provided on the cleaning tank cover; a mechanical seal cooling tank for cooling the mechanical seal assembly of the cleaning tank is fixed on the loading and unloading platform; and exhaust switch butterfly valves and intake switch butterfly valves are installed at the positions where the hot air duct and NMP exhaust gas duct are respectively connected to the cleaning tank.

[0009] Furthermore, the transfer tank includes a tank support frame, a tank body, and a top cover. The tank body is fixed above the tank support frame, and the top cover is fixed to the tank body with screws. A weighing module is provided between the tank body and the tank support frame. A stirring mechanism driven by a stirring motor is fixed above the top cover, and a ribbon paddle is fixed above the stirring mechanism.

[0010] Furthermore, the NMP recycling tank includes a platform scale, an NMP recycling tank body, and an NMP recycling tank top cover; the NMP recycling tank body is placed on the platform scale, and the NMP recycling tank top cover is fixed to the NMP recycling tank body with screws; a motor-driven stirring device is fixed above the NMP recycling tank top cover, and a frame-type paddle is fixed above the stirring device.

[0011] Furthermore, the slurry recovery tank includes a slurry recovery tank trolley, a slurry recovery tank body, and a slurry recovery tank top cover; the slurry recovery tank body is fixed above the slurry recovery tank trolley, and the slurry recovery tank top cover is fixed above the slurry recovery tank body; the slurry recovery tank trolley is placed on a guide support mechanism, and a positioning mechanism is fixed between the slurry recovery tank trolley and the guide support mechanism.

[0012] Furthermore, the NMP buffer tank includes an integrated tank and casters installed below the integrated tank; the top of the integrated tank is provided with a manhole for cleaning and observing the NMP buffer tank, an NMP buffer tank level gauge for monitoring the liquid inside the NMP buffer tank, and an NMP buffer tank breather valve for venting; the top of the integrated tank is also provided with an NMP recovery port for docking with a horizontal screw centrifuge.

[0013] Furthermore, the horizontal decanter centrifuge includes a motor for driving the centrifuge and a rotating drum inside for separating materials; the centrifuge is fixed on a centrifuge mounting frame; the slurry recovery tank and the NMP buffer tank are located below the centrifuge mounting frame; a slag outlet is provided below the centrifuge, and the centrifuge is connected to the slurry recovery tank through the slag outlet; a liquid outlet is also provided below the centrifuge, and the centrifuge is connected to the NMP buffer tank through the liquid outlet; a feed inlet is provided above the centrifuge, and the centrifuge is connected to the transfer tank from the feed inlet via a screw pump.

[0014] Furthermore, this includes the following steps:

[0015] Step 1: Place scraps of electrode material into the cleaning tank and add NMP solvent for cleaning. The active material on the scraps of electrode material dissolves in the NMP solvent to form a slurry with a low concentration.

[0016] Step 2: The slurry is pumped through a rotary filter from the NMP recovery tank diaphragm pump to the transfer tank;

[0017] Step 3: Use a screw pump to pass the slurry through a magnetic filter to remove magnetic substances, and then transport it into a horizontal screw centrifuge.

[0018] Step 4: The active substances and NMP solvent in the slurry are separated by the separation action of the horizontal screw centrifuge. The separated active substances enter the slurry recovery tank, and the NMP solvent enters the NMP buffer tank. Then, the NMP buffer tank is transported to the NMP recovery tank by the diaphragm pump.

[0019] Step 5: After the cleaning tank is cleaned and the material is emptied, hot air is supplied to the electrode waste in the cleaning tank through the heating pack and hot air duct to dry the electrode waste; the exhaust gas is transported to the NMP exhaust gas recovery tower in the plant through the NMP exhaust gas duct and centrifugal fan for treatment.

[0020] The present invention has the following beneficial effects: The present invention provides an electrode material recovery and separation system, which cleans the active material on the electrode sheet through the action of a cleaning tank; and separates the active material and NMP solvent through the separation action of a horizontal screw centrifuge; thereby improving the electrode sheet cleaning effect and slurry recovery efficiency. Attached Figure Description

[0021] Figure 1 This is an overall schematic diagram of an embodiment of the present invention.

[0022] Figure 2 This is a front view of the cleaning tank according to an embodiment of the present invention.

[0023] Figure 3 This is a rear view of the cleaning tank according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the rotating tank in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the NMP recovery tank according to an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of a slurry recovery tank according to an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the NMP cache container according to an embodiment of the present invention.

[0028] Figure 8 This is a front view of the horizontal screw centrifuge according to an embodiment of the present invention.

[0029] Figure 9 This is a top view of the horizontal screw centrifuge according to an embodiment of the present invention.

[0030] The reference numerals in the figure are as follows:

[0031] 100. Cleaning tank; 110. Feeding platform; 111. Control panel; 112. Safety light curtain; 120. Heating pack; 130. Centrifugal fan; 140. Hot air duct; 150. NMP exhaust gas duct; 160. Cleaning tank body; 161. Cleaning tank mixing spindle; 162. Cleaning tank mixing motor; 163. Cleaning tank drive chain; 164. Cleaning tank mixing spindle support bearing; 165. Cleaning tank mechanical seal assembly; 166. Cleaning tank anti-settling mixing paddle; 167. Electrode material frame; 168. Cleaning tank spindle upper support seat; 69. Breathing valve; 170. Cleaning tank lid; 171. Temperature sensor; 172. NMP concentration meter; 173. Safety valve; 174. Cleaning tank lid clamping cylinder; 175. Pressure sensor; 176. Mechanical seal cooling tank; 177. Flip-top servo motor; 178. Top cover safety anti-fool mechanism; 179. Level gauge; 180. Exhaust duct; 181. Exhaust fan; 190. Loading trolley; 191. Loading weighing platform; 200. Transfer tank; 210. Tank body; 220. Top cover; 230. Agitator mechanism; 240. Ribbon 250. Paddle; 260. Weighing module; 270. Tank support frame; 300. Rotary filter; 310. NMP recovery tank; 320. NMP recovery tank body; 330. NMP recovery tank top cover; 340. Stirring device; 350. Frame paddle; 360. Platform scale; 400. NMP recovery tank diaphragm pump; 400. Horizontal screw centrifuge; 410. Horizontal screw centrifuge rack; 420. Horizontal screw centrifuge motor; 430. Horizontal screw centrifuge drum; 440. Horizontal screw centrifuge inlet; 450. Horizontal screw centrifuge slag outlet; 460. Horizontal screw centrifuge... 470. Screw pump; 480. Magnetic filter; 500. NMP buffer tank; 510. Integrated storage tank; 520. Casters; 530. Manhole; 540. NMP buffer tank level gauge; 550. NMP recovery port; 560. NMP buffer tank breather valve; 570. NMP buffer tank diaphragm pump; 600. Slurry recovery tank; 610. Slurry recovery tank body; 620. Slurry recovery tank top cover; 630. Slurry recovery tank trolley; 640. Guide support mechanism; 650. Weighing module; 660. Positioning mechanism;

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] Please see Figure 1As shown, in one embodiment of the present invention, a cleaning tank 100 for cleaning active substances is included. The cleaning tank 100 is connected to a transfer tank 200 via a cleaning tank diaphragm pump and a rotary filter 270. The transfer tank 200 is connected to a horizontal screw centrifuge 400 via a screw pump 470 and a magnetic filter 480. The horizontal screw centrifuge 400 is connected to a slurry recovery tank 600 and an NMP buffer tank 500, respectively. The NMP buffer tank 500 is connected to an NMP recovery tank 300 via an NMP buffer tank diaphragm pump 570. The NMP recovery tank 300 is connected to the cleaning tank via an NMP recovery tank diaphragm pump 360. The cleaning tank is connected to a heating pack 120 via a hot air duct 140. The cleaning tank 100 is also connected to an exhaust fan 181 via an exhaust duct 180. The cleaning tank is connected to an NMP exhaust gas recovery tower via an NMP exhaust gas duct 150 and a centrifugal fan 130.

[0034] Scrap electrode material is placed in cleaning tank 100 and NMP solvent is added for cleaning. The active material on it dissolves in the NMP solvent, forming a low-concentration slurry. The slurry is pumped through NMP recovery tank diaphragm pump 360 and rotary filter 270 to transfer tank 200, and then pumped through magnetic filter 480 by screw pump 470 into horizontal screw centrifuge 400. The horizontal screw centrifuge 400 separates the active material and NMP solvent. The separated active material enters slurry recovery tank 600, and the NMP solvent enters NMP buffer tank 500, and is then pumped through NMP buffer tank diaphragm pump 570 to NMP recovery tank 300. After cleaning and emptying the material, hot air is circulated through heating pack 120 and hot air pipe 140 to dry the electrode waste in the cleaning tank. The waste gas is transported through NMP tail gas pipe 150 and centrifugal fan 130 to the NMP waste gas recovery tower in the plant for treatment.

[0035] Please see Figure 2-3As shown, in another embodiment of the present invention, the cleaning tank 100 includes a cleaning tank body 160 and a cleaning tank cover 170; the cleaning tank body 160 is fixed above the loading and unloading platform 110, and a cleaning tank stirring motor 162 is fixed on the loading and unloading platform 110; a cleaning tank stirring spindle 161 is provided in the middle of the cleaning tank body 160, and the cleaning tank stirring spindle 161 passes through the bottom of the cleaning tank body 160 to the loading and unloading platform 110; the cleaning tank stirring motor 162 drives the cleaning tank transmission chain 163 to drive the cleaning tank... The washing tank stirring spindle 161 rotates; a washing tank stirring spindle support bearing 164 for limiting position and a washing tank mechanical seal assembly 165 for sealing are fixed below the washing tank stirring spindle 161, and a washing tank main shaft support seat 168 for limiting position is fixed above the washing tank stirring spindle 161; an electrode material frame 167 fixed to the washing tank stirring spindle 161 is provided inside the washing tank 100, and an anti-settling stirring paddle of the washing tank located in the electrode material frame 167 is fixed on the washing tank stirring spindle 161.

[0036] NMP solvent is added to the cleaning tank 100 and sprayed until the electrode is submerged. The cleaning tank stirring motor 162 drives the cleaning tank transmission chain 163 to drive the cleaning tank stirring main shaft 161 to rotate, which in turn drives the electrode material frame 167 to rotate for cleaning. After cleaning, the electrode waste is dried to remove residual NMP. At this time, the cleaning tank 100 first rotates at high speed to spin dry the electrode, and then hot air is introduced from the bottom of the cleaning tank 100 to dry the electrode.

[0037] The loading and unloading platform 110 is equipped with a control panel 111 for operating and controlling the cleaning tank; a flip-top servo motor 177 for controlling the opening and closing of the cleaning tank lid 170 is fixed on the tank body; a safety light curtain 112 is installed in front of the cleaning tank body 160 to prevent the opening and closing of the cleaning tank lid 170 from causing injury to the operator; a top cover safety anti-fool mechanism 178 is fixed on the cleaning tank lid; during operation, the operator starts to put the electrode sheets into the electrode sheet frame 167 inside the loading trolley 190, and then pushes the loading trolley 190 onto the loading and weighing platform 191. The electrode is weighed and the weight of the electrode is read. Then, the electrode frame 167 is placed into the cleaning tank 1000 on the loading platform 110 using a hoisting tool. Subsequently, the control panel 111 is operated, and the flip-top servo motor 177 drives the cleaning tank lid 170 to close and lock. The flip-top servo motor 177 is equipped with a brake, which can effectively prevent injury to personnel from sudden power failures and other accidents where the cleaning tank lid 170 closes by gravity. When the cleaning tank lid 170 is opened to 90 degrees, there is also a top cover safety anti-fooling mechanism 178 to lock the cleaning tank lid 170, which plays a double protection role.

[0038] In the above embodiments of the present invention, cleaning tank lid clamping cylinders 174 for clamping cleaning tank lid 170 are fixed on both sides of the cleaning tank; a safety valve 173 for depressurizing the cleaning tank is provided on the cleaning tank lid 170; a mechanical seal cooling tank 176 for cooling the mechanical seal assembly 165 of the cleaning tank is fixed on the loading and unloading platform 110; an exhaust switch butterfly valve and an intake switch butterfly valve are installed at the positions where the hot air duct 140 and the NMP exhaust gas duct 150 are respectively connected to the cleaning tank.

[0039] A level gauge 179 for monitoring the liquid level in the cleaning tank 100 is fixed to the side wall; a pressure sensor 175 for monitoring the internal pressure of the cleaning tank is fixed to the side of the cleaning tank; a mechanical seal cooling tank 176 for cooling the mechanical seal assembly 165 of the cleaning tank is fixed on the loading and unloading platform 110; an NMP concentration meter 172 for detecting NMP is installed on the NMP exhaust gas pipeline 150; the exhaust switch butterfly valve is closed during cleaning; the intake switch butterfly valve is opened during drying; and the cover clamping cylinder clamps and locks the cover.

[0040] Please see Figure 5 As shown, in another embodiment of the present invention, the transfer tank 200 includes a tank support frame 260, a tank body 210, and a top cover 220. The tank body 210 is fixed above the tank support frame 260, and the top cover 220 is fixed to the tank body 210 by screws. A weighing module 250 is provided between the tank body 210 and the support frame 260. A stirring mechanism 230 driven by a stirring motor is fixed above the top cover 220, and a ribbon paddle 240 is fixed above the stirring mechanism 230.

[0041] The transfer tank 200 is used for transferring materials. The stirring mechanism 230 drives the ribbon paddle 240 to rotate under the drive of the stirring motor to prevent the material from settling. The weighing module 250 is used to monitor the changes in the material inside the tank.

[0042] Please see Figure 6 As shown, in another embodiment of the present invention, the NMP recycling tank 300 includes a platform scale 350, an NMP recycling tank body 310, and an NMP recycling tank top cover 320; the NMP recycling tank body 310 is placed on the platform scale, and the NMP recycling tank top cover 320 is fixed to the NMP recycling tank body 310 by screws; a stirring device 330 driven by a motor is fixed above the NMP recycling tank top cover 320, and a frame-type paddle 340 is fixed above the stirring device 330.

[0043] The NMP recovery tank 300 is used to recover NMP separated from the horizontal screw centrifuge 400; the stirring device 330 drives the frame paddle to rotate under the drive of the motor to prevent material sedimentation; and the platform scale 350 is used to measure the material changes in the NMP recovery tank 300.

[0044] Please see Figure 7 As shown, in another embodiment of the present invention, the slurry recovery tank 600 includes a slurry recovery tank trolley 630, a slurry recovery tank body 610, and a slurry recovery tank body top cover 620; the slurry recovery tank body 610 is fixed above the slurry recovery tank trolley 630, and the slurry recovery tank body top cover 620 is fixed above the slurry recovery tank body 610; the slurry recovery tank trolley 630 is placed on a guide support mechanism 640, and a positioning mechanism 660 is fixed between the slurry recovery tank trolley 630 and the guide support mechanism 640.

[0045] The top cover 620 of the slurry recovery tank is used to dock the slurry separated from the horizontal screw centrifuge 400, the positioning mechanism 660 is used to detect and lock the slurry recovery tank trolley 630, and the weighing module 250 is used to measure and monitor the weight of the slurry inside the tank.

[0046] Please see Figure 8-9 As shown, in another embodiment of the present invention, the NMP buffer tank 500 includes an integrated tank 510 and casters 520 installed below the integrated tank 510; the top of the integrated tank 510 is provided with a manhole 530 for cleaning and observing the NMP buffer tank 500, an NMP buffer tank level gauge 540 for monitoring the liquid inside the NMP buffer tank 500, and an NMP buffer tank breather valve 560 for venting; the top of the integrated tank 510 is also provided with an NMP recovery port 550 for docking with a horizontal decanter centrifuge 400; the NMP buffer tank 500 is used to buffer NMP separated from the horizontal decanter centrifuge 400.

[0047] Please see Figure 1-4 As shown, in another embodiment of the present invention, the horizontal decanter centrifuge 400 includes a horizontal decanter centrifuge motor 420 for driving and a horizontal decanter centrifuge drum 430 disposed inside for separating materials; the horizontal decanter centrifuge 400 is fixed on a horizontal decanter centrifuge mounting frame 410; the slurry recovery tank 600 and the NMP buffer tank 500 are located below the horizontal decanter centrifuge mounting frame 410; a horizontal decanter centrifuge slag outlet 450 is provided below the horizontal decanter centrifuge 400, which is connected to the slurry recovery tank 600; a horizontal decanter centrifuge liquid outlet 460 is also provided below the horizontal decanter centrifuge 400, which is connected to the NMP buffer tank; a feed inlet is provided above the horizontal decanter centrifuge 400, and the horizontal decanter centrifuge 400 is connected to the transfer tank 200 from the feed inlet via a screw pump 470.

[0048] Before the decanter centrifuge 400 is put into operation, its speed needs to be adjusted to a speed that can separate materials. Then, the material in the transfer tank 200 is pumped into the decanter centrifuge inlet 440 through the screw pump 470. After being separated by the decanter centrifuge drum 430, the active substance slurry flows from the decanter centrifuge slag outlet 450 into the slurry recovery tank 600; NMP flows from the decanter centrifuge liquid outlet 460 into the NMP buffer tank 500, and finally is pumped into the NMP recovery tank 300 by the NMP buffer tank diaphragm pump 570.

[0049] Please see Figure 1 As shown, a method of using the present invention according to an embodiment includes the following steps:

[0050] Step 1: Place scraps of electrode material into the cleaning tank 100 and add NMP solvent for cleaning. The active material on the scraps of electrode material dissolves in the NMP solvent to form a slurry with a low concentration.

[0051] Step 2: The slurry is pumped from the NMP recovery tank diaphragm pump 360 through the rotary filter 270 to the transfer tank 200;

[0052] Step 3: Use screw pump 470 to pass the slurry through magnetic filter 480 to remove magnetic substances, and then transport it into horizontal screw centrifuge 400;

[0053] Step 4: The active substances and NMP solvent in the slurry are separated by the separation action of the horizontal screw centrifuge 400. The separated active substances enter the slurry recovery tank 600, and the NMP solvent enters the NMP buffer tank 500. Then, it is transported to the NMP recovery tank 300 by the NMP buffer tank diaphragm pump 570.

[0054] Step 5: After cleaning and emptying the material, the cleaning tank 100 is heated by the heating pack 120 and hot air pipe 140 to dry the electrode waste. The waste gas is then transported to the NMP waste gas recovery tower in the plant through the NMP tail gas pipe 150 and centrifugal fan 130 for treatment.

[0055] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An electrode material recovery and separation system, characterized in that: The system includes a cleaning tank for cleaning active substances, which is connected to a transfer tank via a diaphragm pump and a rotary filter; the transfer tank is connected to a horizontal screw centrifuge via a screw pump and a magnetic filter; the horizontal screw centrifuge is connected to a slurry recovery tank and an NMP buffer tank, respectively; the NMP buffer tank is connected to an NMP recovery tank via an NMP buffer tank diaphragm pump; the NMP recovery tank is connected to the cleaning tank via an NMP recovery tank diaphragm pump; the cleaning tank is connected to a heating pack via a hot air duct and also to an exhaust fan via an exhaust duct; the cleaning tank is connected to an NMP exhaust gas recovery tower via an NMP exhaust gas duct and a centrifugal fan. The cleaning tank includes a cleaning tank body and a cleaning tank cover; the cleaning tank body is fixed above the loading and unloading platform, and a cleaning tank stirring motor is fixed on the loading and unloading platform; a cleaning tank stirring main shaft is set in the middle of the cleaning tank body, and the cleaning tank stirring main shaft passes through the bottom of the cleaning tank body to the loading and unloading platform; the cleaning tank stirring motor drives the cleaning tank transmission chain to drive the cleaning tank stirring main shaft to rotate; a cleaning tank stirring main shaft support bearing for limiting position and a cleaning tank mechanical seal sealing assembly for sealing are fixed below the cleaning tank stirring main shaft; a cleaning tank main shaft support seat for limiting position is fixed above the cleaning tank stirring main shaft; an electrode material frame is set inside the cleaning tank and fixed to the cleaning tank stirring main shaft, and an anti-settling stirring paddle of the cleaning tank located on the electrode material frame is fixed on the cleaning tank stirring main shaft.

2. The electrode material recovery and separation system according to claim 1, characterized in that: The cleaning tank is fixed with cleaning tank cover clamping cylinders on both sides for clamping the cleaning tank cover; a safety valve for depressurizing the cleaning tank is provided on the cleaning tank cover; a mechanical seal cooling tank for cooling the mechanical seal assembly of the cleaning tank is fixed on the loading and unloading platform; an exhaust switch butterfly valve and an intake switch butterfly valve are installed at the positions where the hot air pipe and NMP exhaust gas pipe are respectively connected to the cleaning tank.

3. The electrode material recovery and separation system according to claim 1, characterized in that: The transfer tank includes a tank support frame, a tank body, and a top cover. The tank body is fixed above the tank support frame, and the top cover is fixed to the tank body with screws. A weighing module is provided between the tank body and the tank support frame. A stirring mechanism driven by a stirring motor is fixed above the top cover, and a ribbon paddle is fixed above the stirring mechanism.

4. The electrode material recovery and separation system according to claim 1, characterized in that: The NMP recycling tank includes a platform scale, an NMP recycling tank body, and an NMP recycling tank top cover; the NMP recycling tank body is placed on the platform scale, and the NMP recycling tank top cover is fixed to the NMP recycling tank body with screws; a motor-driven stirring device is fixed on top of the NMP recycling tank top cover, and a frame-type paddle is fixed on top of the stirring device.

5. The electrode material recovery and separation system according to claim 1, characterized in that: The slurry recovery tank includes a slurry recovery tank trolley, a slurry recovery tank body, and a slurry recovery tank top cover; the slurry recovery tank body is fixed above the slurry recovery tank trolley, and the slurry recovery tank top cover is fixed above the slurry recovery tank body; the slurry recovery tank trolley is placed on a guide support mechanism, and a positioning mechanism is fixed between the slurry recovery tank trolley and the guide support mechanism.

6. The electrode material recovery and separation system according to claim 1, characterized in that: The NMP buffer tank includes an integrated tank and casters installed below the integrated tank; the top of the integrated tank is provided with a manhole for cleaning and observing the NMP buffer tank, a level gauge for monitoring the liquid inside the NMP buffer tank, and a breather valve for venting; the top of the integrated tank is also provided with an NMP recovery port for docking with a horizontal screw centrifuge.

7. The electrode material recovery and separation system according to claim 1, characterized in that: The horizontal decanter centrifuge includes a motor for driving the centrifuge and an internal centrifuge drum for separating materials. The centrifuge is fixed on a centrifuge rack. The slurry recovery tank and NMP buffer tank are located below the centrifuge rack. A slag outlet is provided below the centrifuge, and the centrifuge is connected to the slurry recovery tank through the slag outlet. A liquid outlet is also provided below the centrifuge, and the centrifuge is connected to the NMP buffer tank through the liquid outlet. A feed inlet is provided above the centrifuge, and the centrifuge is connected to the transfer tank through the feed inlet via a screw pump.

8. A method of using the electrode material recovery and separation system according to any one of claims 1-7, characterized in that: Includes the following steps: Step 1: Place scraps of electrode material into the cleaning tank and add NMP solvent for cleaning. The active material on the scraps of electrode material dissolves in the NMP solvent to form a slurry with a low concentration. Step 2: The slurry is pumped through a rotary filter from the NMP recovery tank diaphragm pump to the transfer tank; Step 3: Use a screw pump to pass the slurry through a magnetic filter to remove magnetic substances, and then transport it into a horizontal screw centrifuge. Step 4: The active substances and NMP solvent in the slurry are separated by the separation action of the horizontal screw centrifuge. The separated active substances enter the slurry recovery tank, and the NMP solvent enters the NMP buffer tank. Then, the NMP buffer tank is transported to the NMP recovery tank by the diaphragm pump. Step 5: After the cleaning tank is cleaned and the material is emptied, hot air is supplied to the electrode waste in the cleaning tank through the heating pack and hot air duct to dry the electrode waste; the exhaust gas is transported to the NMP exhaust gas recovery tower in the plant through the NMP exhaust gas duct and centrifugal fan for treatment.

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