Lithium bis (fluorosulfonyl) imide slurry washing device

Abstract

The invention relates to a lithium bis (fluorosulfonyl) imide slurry washing device. The lithium bis (fluorosulfonyl) imide slurry washing device comprises a shell, the top of the shell is provided with a detergent injection pipe and a slurry injection pipe, the tail ends of the detergent injection pipe and the slurry injection pipe are respectively provided with an opening and closing valve, and the bottom of the shell is provided with a filter disc; the stirring mechanism comprises a stirring shaft penetrating through the upper end of the shell, a stirring impeller fixed to the stirring shaft and a first driving motor fixed to the top of the shell, the stirring shaft is provided with a hollow structure, a transmission rod is arranged in the hollow structure, and a scraping plate matched with the filtering disc is arranged at the tail end of the transmission rod. By arranging the first linkage mechanism and the second linkage mechanism, pulse type injection of a detergent and slurry can be achieved, pulse type injection of the detergent is continued while injection of the slurry is stopped after sufficient slurry is injected, and solid-liquid mixing can be performed on the slurry and the detergent, so that the slurry and washing liquid mixing effect is improved; and the washing efficiency and the washing effect of the lithium bis (fluorosulfonyl) imide slurry are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium bis(fluorosulfonyl)imide production, and particularly relates to a lithium bis(fluorosulfonyl)imide slurry washing device. Background Art

[0002] Lithium bis(fluorosulfonyl)imide (LiSFM), with its superior performance and broad application prospects, is becoming a key research focus in the lithium battery electrolyte field. LiSFM boasts far superior physical and chemical properties to lithium hexafluorophosphate (LFP), making it a promising alternative and aligning with the current development trend of electrolytes.

[0003] During the production of lithium bis(fluorosulfonyl)imide, the lithium bis(fluorosulfonyl)imide slurry after dewatering contains various miscellaneous acids, which are particularly corrosive. Subsequent equipment and pipelines require fluorine lining for corrosion protection, which is costly and unsafe. Therefore, after dewatering, the lithium bis(fluorosulfonyl)imide slurry must be washed in a washing device to remove various miscellaneous acids so that subsequent processes can be perfectly implemented. The lithium bis(fluorosulfonyl)imide slurry washing device in the prior art mixes and stirs the lithium bis(fluorosulfonyl)imide slurry and detergent in a stirring manner, thereby washing the lithium bis(fluorosulfonyl)imide slurry. However, this type of washing device has the following problems: 1. The lithium bis(fluorosulfonyl)imide slurry and detergent are separately introduced into the washing device at one time, which makes it difficult to disperse and fully contact the lithium bis(fluorosulfonyl)imide slurry and detergent in a stirring manner, resulting in poor washing effect and low washing efficiency. 2. After a period of use, the filter disc used to filter lithium bis(fluorosulfonyl)imide is prone to clogging. The device needs to be disassembled to clean the filter disc, which consumes a lot of manpower and seriously reduces production efficiency. In addition, impurities will enter during the disassembly and assembly process, affecting product quality. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a lithium bis(fluorosulfonyl)imide slurry washing device.

[0005] The technical solution of a lithium bis(fluorosulfonyl)imide slurry washing device of the present invention is:

[0006] A lithium bis(fluorosulfonyl)imide slurry washing device, comprising:

[0007] The shell has a detergent injection pipe and a slurry injection pipe on the top, the ends of the detergent injection pipe and the slurry injection pipe are respectively provided with opening and closing valves, and a filter disc is provided at the bottom;

[0008] The stirring mechanism includes a stirring shaft passing through the upper end of the housing, a stirring impeller fixed to the stirring shaft, and a first drive motor fixed to the top of the housing. The stirring shaft has a hollow structure, a transmission rod is provided in the hollow structure, and a scraper plate matching the filter disc is provided at the end of the transmission rod;

[0009] The transmission mechanism includes a fixed box arranged on the upper section of the stirring shaft. A second driving motor is provided inside the fixed box, and the second driving motor is connected to a transmission rod through a split electromagnetic coupling;

[0010] The first linkage mechanism is used to intermittently open and close the opening and closing valve of the detergent injection pipe when the stirring shaft rotates;

[0011] The second linkage mechanism is used to intermittently open and close the opening and closing valve of the slurry injection pipe when the stirring shaft rotates forward, and keep the opening and closing valve of the slurry injection pipe closed when rotating in the reverse direction.

[0012] Further, the opening and closing valve includes a valve body, a valve core, a valve rod and a return spring. The valve body is fixedly connected to the detergent injection pipe or the slurry injection pipe. A through hole communicating with the detergent injection pipe or the slurry injection pipe is provided inside the valve body. The valve core is guidingly installed inside the valve body. A valve hole communicating with the through hole is provided on the valve core. The return spring is arranged between the valve body and the valve core to stagger the valve hole of the valve core from the through hole. The valve rod is fixedly connected to the valve core and its end extends horizontally to the outside of the valve body. A contact plate is provided at the end of the valve rod.

[0013] Further, the first linkage mechanism includes a first gear and a first cam. The first gear is rotatably installed on the washing liquid injection pipe through a first mounting rod. The first cam is rotatably installed on the housing through a first fixing rod. The first gear is fixedly connected to the first cam. A toothed ring matching the first gear is provided on the outer wall of the fixed box.

[0014] Further, the second linkage mechanism includes a second gear, a runner and a second cam. The second gear is rotatably installed on the slurry injection pipe through a second mounting rod. The second gear meshes with the toothed ring. The second cam is rotatably installed on the housing through a second fixing rod. The runner is coaxially and fixedly connected to the second gear. A ratchet-shaped groove is provided on the lower side of the second cam. The runner is located inside the groove. A pawl matching the ratchet teeth of the groove is provided on the runner.

[0015] Further, a discharge port is provided at the central position of the lower end of the housing. The filter disc has an inverted truncated conical structure. The outer peripheral edge of the filter disc forms a sealed connection with the inner wall of the housing, and the inner peripheral edge forms a circumferential sealed connection around the feed port of the discharge port. An annular chamber is formed between the filter disc and the inner wall of the housing. A filtrate discharge pipe communicating with the annular chamber is provided on the housing.

[0016] Further, the housing includes an upper housing section, a cylindrical housing section, and a lower housing section. A detachable connection is achieved between the cylindrical housing section and the lower housing section through a flange sealing and assembling structure. The filter disc is coaxially arranged at the lower part of the inner cavity of the cylindrical housing section, and an outer annular sealing flange is provided on its outer peripheral edge. The outer annular sealing flange and the flange sealing and assembling structure are clamped for sealing.

[0017] Further, the flange sealing and assembling structure includes an upper flange and a lower flange. The upper flange is fixedly and sealingly connected to the lower end of the cylindrical housing section, and the lower flange is sealingly and fixedly connected to the upper end of the lower housing section. Sealing gaskets matching the upper flange and the lower flange are respectively provided on the upper and lower sides of the outer annular sealing flange. An inner annular sealing flange is provided on the inner peripheral edge of the filter disc, and the inner annular sealing flange is sealingly and fixedly connected to the feed port of the discharge port. A discharge pipe is sealingly and fixedly connected to the discharge port of the discharge port.

[0018] Further, a plurality of support plates fixedly connected to the lower housing section are provided on the lower side of the filter disc. An acidity detection device is fixedly connected to the filtrate discharge pipe. A semi-tube jacket is spirally wound on the outer wall of the cylindrical housing section, and a heat exchange medium inlet and a heat exchange medium outlet are provided on the semi-tube jacket.

[0019] The present invention provides a lithium bis(fluorosulfonyl)imide slurry washing device. Compared with the prior art, its beneficial effects are as follows:

[0020] When the lithium bis(fluorosulfonyl)imide slurry washing device of the present invention is in use, start the first driving motor. When the output shaft of the first driving motor rotates forward, through the first linkage mechanism and the second linkage mechanism, the opening and closing valves on the washing liquid injection pipe and the slurry injection pipe are intermittently opened and closed, realizing the pulsed injection of the washing liquid and the slurry. During the rotation of the stirring shaft, solid-liquid mixing is realized. When enough slurry enters the housing, make the first driving motor rotate reversely, the washing liquid is pulsed into the housing, and the slurry stops being transferred. Continuously add the detergent, the detergent is fully mixed with the slurry, the electric ball valve on the filtrate discharge pipe is opened, the washed acid solution is filtered out through the filter disc and flows out of the housing through the filtrate discharge pipe, and the coarse salt particles stay in the housing. Wash and remove acid repeatedly until the material is neutral. After the acidity detection device on the filtrate discharge pipe detects that the acidity is qualified, turn off the first driving motor and the electric ball valve on the filtrate discharge pipe, and open the electric ball valve on the discharge pipe, so that the lithium bis(fluorosulfonyl)imide slurry can directly enter the stainless steel centrifuge for subsequent processes. After working for a period of time, the electromagnetic coupling is energized, the second driving motor is started, the second driving motor drives the transmission rod to rotate, and the transmission rod drives the scraping plate to scrape the lithium bis(fluorosulfonyl)imide attached to the filter disc to avoid blocking the filter disc.

[0021] The lithium bis(fluorosulfonyl)imide slurry washing device of the present invention can achieve pulsed injection of the detergent and the slurry by setting the first linkage mechanism and the second linkage mechanism. Moreover, after sufficient slurry is injected, the injection of the slurry stops while the detergent continues to be pulsed, and it can carry out solid-liquid mixing of the slurry and the detergent, improving the mixing effect of the slurry and the washing liquid, and enhancing the washing efficiency and washing effect of the lithium bis(fluorosulfonyl)imide slurry.

[0022] The upper housing section and the cylindrical housing section are integrally formed, and the cylindrical housing section and the lower housing section are connected by a flange and cooperate with a bolt assembly to achieve quick disassembly and assembly. This design facilitates internal cleaning, filter disc replacement, and fault repair, significantly reducing the downtime. The filter disc is clamped and fixed by a flange, and a gasket is combined to ensure the sealing performance. When disassembling, only the bolts need to be loosened, simplifying the maintenance process. Brief Description of the Drawings

[0023] Figure 1 is a schematic diagram of the internal structure of the lithium bis(fluorosulfonyl)imide slurry washing device of the present invention;

[0024] Figure 2 is a schematic diagram of the structure of the upper housing section of the lithium bis(fluorosulfonyl)imide slurry washing device of the present invention;

[0025] Figure 3 is a schematic diagram of the structure of the lower housing section of the lithium bis(fluorosulfonyl)imide slurry washing device of the present invention;

[0026] Figure 4 is a schematic diagram of the structure of the runner and the second cam of the lithium bis(fluorosulfonyl)imide slurry washing device of the present invention;

[0027] In the figure: 1. Upper housing section; 2. Cylindrical housing section; 3. Lower housing section; 4. Detergent injection pipe; 5. Slurry injection pipe; 6. Discharge port; 7. Discharge pipe; 8. Motor fixing seat; 9. Filtrate discharge pipe; 10. Filter disc; 11. Support plate; 12. Upper flange; 13. Lower flange; 14. Outer annular sealing flange; 15. Inner annular sealing flange; 16. Half pipe clamp; 17. Baffle; 18. Stirring shaft; 19. Stirring impeller; 20. First driving motor; 21. Transmission rod; 22. Connecting rod; 23. Scraping plate; 24. Fixed box; 25. Opening and closing valve; 26. Valve body; 27. Valve core; 28. Valve hole; 29. Return spring; 30. Valve rod; 31. Contact plate; 32. Second driving motor; 33. Gear ring; 34. First fixing rod; 35. First mounting rod; 36. First gear; 37. First cam; 38. Second fixing rod; 39. Second mounting rod; 40. Second gear; 41. Runner; 42. Second cam; 43. Groove; 44. Pawl. Detailed Description of the Invention

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0029] A specific embodiment of the lithium bis(fluorosulfonyl)imide slurry washing device of the present invention is as Figures 1 to 4 shown, including a housing. The housing adopts a three-section structure, and the housing includes an upper housing section 1, a cylindrical housing section 2, and a lower housing section 3. The upper housing section 1 has a hemispherical top cover structure, and the lower housing section 3 has an inverted conical shape. The upper housing section 1 and the cylindrical housing section 2 are of an integral structure, and the cylindrical housing section 2 and the lower housing section 3 are detachably connected through a flange sealing assembly structure.

[0030] A motor fixing seat 8 is fixedly connected to the center of the upper housing section 1. A washing liquid injection pipe 4 and a slurry injection pipe 5 are fixedly connected to the upper housing section 1. The washing liquid injection pipe 4 and the slurry injection pipe 5 are symmetrically arranged with respect to the motor fixing seat 8. The washing liquid injection pipe 4 and the slurry injection pipe 5 extend into the interior of the upper housing section 1. A plurality of baffles 17 are fixedly connected to the inner wall of the cylindrical housing section 2 and are evenly spaced along the circumferential direction of the cylindrical housing section 2. The baffles 17 extend vertically. The flange sealing assembly structure includes an upper flange plate 12 and a lower flange plate 13. The upper flange plate 12 is fixedly and sealingly connected to the lower end of the cylindrical housing section, and the lower flange plate 13 is sealingly and fixedly connected to the upper end of the lower housing section 3. A discharge port 6 is provided at the center of the bottom of the lower housing section 3. A filter plate 10 is fixedly connected to the top of the lower housing section 3. The filter plate 10 has an inverted truncated conical structure. An outer annular sealing flange 14 is provided on the outer peripheral edge of the filter plate 10. Sealing gaskets matching the upper flange plate 12 and the lower flange plate 13 are respectively provided on the upper and lower sides of the outer annular sealing flange 14. The outer annular sealing flange 14 has a plurality of through holes corresponding one by one to the flange holes of the upper flange plate 12 and the lower flange plate 13. The upper flange plate 12, the lower flange plate 13, and the outer annular sealing flange 14 are sealingly and fixedly connected through a plurality of bolt assemblies. An inner annular sealing flange 15 is provided on the inner peripheral edge of the filter plate 10. The inner annular sealing flange 15 is sealingly and fixedly connected to the feed port of the discharge port 6. A discharge pipe 7 is sealingly and fixedly connected to the discharge port of the discharge port 6. An annular chamber is formed between the lower side of the filter plate 10 and the inner wall of the housing. A filtrate discharge pipe 9 communicating with the annular chamber is fixedly connected to the housing. A plurality of support plates 11 fixedly connected to the inner wall of the lower housing section 3 are fixedly connected to the lower side surface of the filter plate 10. An acidity detection device is fixedly connected to the filtrate discharge pipe 9. A half-pipe jacket 16 is spirally wound around the outer wall of the cylindrical housing section 2. A heat transfer medium inlet and a heat transfer medium outlet are provided on the half-pipe jacket 16.

[0031] The ends of the detergent injection pipe and the slurry injection pipe 5 are respectively fixedly connected with opening and closing valves 25. The opening and closing valve 25 includes a valve body 26, a valve core 27, a valve rod 30 and a return spring 29. The valve body 26 is fixedly connected to the detergent injection pipe or the slurry injection pipe 5. A through hole communicating with the detergent injection pipe or the slurry injection pipe 5 is provided in the valve body 26. The valve core 27 is guidingly installed in the valve body 26, and a valve hole 28 communicating with the through hole is provided on the valve core 27. The return spring 29 is arranged between the valve body 26 and the valve core 27 to stagger the valve hole 28 of the valve core 27 from the through hole. The valve rod 30 is fixedly connected to the valve core 27 and its end extends horizontally to the outside of the valve body 26. A contact plate 31 is provided at the end of the valve rod 30.

[0032] The housing is equipped with a stirring mechanism. The stirring mechanism includes a stirring shaft 18 passing through the upper end of the housing, a stirring impeller 19 fixed on the stirring shaft 18 and a first driving motor 20 fixed on the top of the housing. The first driving motor 20 is fixedly connected to the upper end of the motor fixing seat 8. The upper end of the stirring shaft 18 is rotatably installed at the upper end of the housing through a bearing. The upper end of the stirring shaft 18 extends into the motor fixing seat 8, and the upper section of the stirring shaft 18 is fixedly connected to the output shaft of the first driving motor 20 through a coupling. The lower end of the stirring shaft 18 extends to the bottom of the housing. The stirring shaft 18 has a hollow structure, and a transmission rod 21 is arranged in the hollow structure. The end of the transmission rod 21 extends out of the lower side of the stirring shaft 18 and is rotatably connected to the stirring shaft 18 through a bearing. Two connecting rods 22 are fixedly connected to the lower end of the transmission rod 21, and scraping plates 23 matching the filter disc 10 are respectively fixedly connected to the ends of the two connecting rods 22.

[0033] A transmission mechanism is arranged in the housing. The transmission mechanism includes a fixed box 24 fixedly connected to the upper section of the stirring shaft 18. The fixed box 24 is located inside the housing. A second driving motor 32 is fixedly connected in the fixed box 24. The hollow structure of the stirring shaft 18 is located below the fixed box 24. The upper end of the transmission rod 21 extends into the fixed box 24 and is rotatably connected to the fixed box 24 through a bearing. The second driving motor 32 is connected to the transmission rod 21 through a split electromagnetic coupling. After the electromagnetic coupling is energized, the output shaft of the second driving motor 32 is connected to the transmission rod 21, and the second driving motor 32 can drive the transmission rod 21 to rotate. After the electromagnetic coupling is powered off, the output shaft of the second driving motor 32 is disconnected from the transmission rod 21, and the second driving motor 32 cannot drive the transmission rod 21 to rotate.

[0034] A first linkage mechanism and a second linkage mechanism are arranged in the housing. The first linkage mechanism is used to drive the opening and closing valve 25 of the detergent injection pipe to open and close intermittently when the stirring shaft 18 rotates; the second linkage mechanism is used to drive the opening and closing valve 25 of the slurry injection pipe 5 to open and close intermittently when the stirring shaft 18 rotates forward, and the opening and closing valve 25 of the slurry injection pipe 5 remains closed when rotating in the reverse direction.

[0035] The first linkage mechanism includes a first gear 36 and a first cam 37. A first mounting rod 35 is fixedly connected to the outer wall of the washing liquid injection pipe 4. The first gear 36 is rotatably mounted on the first mounting rod 35 through a bearing. A toothed ring 33 matching the first gear 36 is provided on the outer wall of the fixed box 24, and the first gear 36 meshes with the toothed ring 33. A vertically arranged first fixing rod 34 is fixedly connected to the housing. The first cam 37 is rotatably mounted at the lower end of the first fixing rod 34 through a bearing, and the first gear 36 is fixedly connected to the first cam 37. When the stirring shaft 18 rotates, it drives the fixed box 24 to rotate. The fixed box 24 drives the first gear 36 to rotate, and the first cam 37 rotates with the first gear 36. When the first cam 37 is in the pushing stroke, it drives the valve stem 30 of the on-off valve 25 on the washing liquid injection pipe 4 to move into the valve body 26. The valve core 27 moves into the valve body 26 along with the valve stem 30. When the valve hole 28 of the valve core 27 communicates with the through hole of the valve body 26, the washing liquid enters the housing. When the first cam 37 is in the return stroke, the valve core 27 moves under the action of the return spring 29 until the valve hole 28 of the valve core 27 is not communicated with the through hole, and the washing liquid stops flowing into the housing.

[0036] The second linkage mechanism includes a second gear 40, a runner 41 and a second cam 42. A second mounting rod 39 is fixedly connected to the outer wall of the slurry injection pipe 5. The second gear 40 is rotatably mounted on the second mounting rod 39 through a bearing, and the second gear 40 meshes with the toothed ring 33. A vertically arranged second fixing rod 38 is fixedly connected to the housing. The second cam 42 is rotatably mounted at the lower end of the second fixing rod 38 through a bearing. The runner 41 is coaxially fixedly connected to the second gear 40. A ratchet-shaped groove 43 is provided on the lower side of the second cam 42. The runner 41 is located in the groove 43, and the runner 41 has pawls 44 matching the ratchet teeth of the groove 43. When the stirring shaft 18 rotates forward (clockwise), it drives the fixed box 24 to rotate. The fixed box 24 drives the second gear 40 to rotate, and the runner 41 rotates with the second gear 40. When the runner 41 rotates forward, the pawl 44 abuts against the ratchet teeth of the groove 43 on the second cam 42, pushing the second cam 42 to rotate. When the second cam 42 is in the pushing stroke, it drives the valve stem 30 of the on-off valve 25 on the slurry injection pipe 5 to move into the valve body 26. The valve core 27 moves into the valve body 26 along with the valve stem 30. When the valve hole 28 of the valve core 27 communicates with the through hole of the valve body 26, the slurry enters the housing. When the second cam 42 is in the return stroke, the valve core 27 moves under the action of the return spring 29 until the valve hole 28 of the valve core 27 is not communicated with the through hole, and the slurry stops flowing into the housing. When the stirring shaft 18 rotates backward (counterclockwise), it drives the fixed box 24 to rotate. The fixed box 24 drives the second gear 40 to rotate, and the runner 41 rotates with the second gear 40. When the runner 41 rotates backward, the pawl 44 rotates along the ratchet teeth of the groove 43 on the second cam 42, and the second cam 42 does not rotate with the runner 41. The on-off valve 25 on the slurry injection pipe 5 is in the closed state, and the slurry cannot enter the housing.

[0037] When the lithium bis(fluorosulfonyl)imide slurry washing device of the present invention is in use, start the first drive motor 20. When the output shaft of the first drive motor 20 rotates forward, through the first linkage mechanism and the second linkage mechanism, the opening and closing valves 25 on the washing liquid injection pipe 4 and the slurry injection pipe 5 are intermittently opened and closed, realizing the pulsed injection of the washing liquid and the slurry. During the rotation of the stirring shaft 18, solid-liquid mixing is achieved. When enough slurry enters the shell, make the first drive motor 20 rotate in the reverse direction, the washing liquid is pulsed into the shell, and the slurry stops being transferred. Continuously add the detergent, and the detergent is fully mixed with the slurry. The electric ball valve on the filtrate discharge pipe 9 is opened, and the washed acid solution is filtered out through the filter disc 10 and flows out of the shell through the filtrate discharge pipe 9. The coarse salt particles remain in the shell. Wash and remove acid repeatedly until the material is neutral. After the acidity detection device on the filtrate discharge pipe 9 detects that the acidity is qualified, turn off the first drive motor 20 and the electric ball valve on the filtrate discharge pipe 9, and open the electric ball valve on the discharge pipe 7, so that the lithium bis(fluorosulfonyl)imide slurry can directly enter the stainless steel centrifuge for subsequent processes. After working for a period of time, the electromagnetic coupling is energized, and the second drive motor 32 is started. The second drive motor 32 drives the transmission rod 21 to rotate, and the transmission rod 21 drives the scraping plate 23 to scrape off the lithium bis(fluorosulfonyl)imide attached to the filter disc 10 to prevent the filter disc 10 from being blocked.

[0038] By setting the first linkage mechanism and the second linkage mechanism, the lithium bis(fluorosulfonyl)imide slurry washing device of the present invention can realize the pulsed injection of the detergent and the slurry, and continue to pulse-inject the detergent while stopping the injection of the slurry after sufficient slurry is injected, and can perform solid-liquid mixing on the slurry and the detergent, improving the mixing effect of the slurry and the washing liquid, and improving the washing efficiency and washing effect of the lithium bis(fluorosulfonyl)imide slurry.

[0039] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lithium bis(fluorosulfonyl)imide slurry washing device, characterized in that Comprising: A housing, with a detergent injection pipe and a slurry injection pipe provided at the top. Opening and closing valves are respectively provided at the ends of the detergent injection pipe and the slurry injection pipe, and a filter disc is provided at the bottom; A stirring mechanism, including a stirring shaft passing through the upper end of the housing, a stirring impeller fixed on the stirring shaft, and a first driving motor fixed on the top of the housing. The stirring shaft has a hollow structure, and a transmission rod is provided inside the hollow structure. A scraping plate matching the filter disc is provided at the end of the transmission rod; A transmission mechanism, including a fixed box provided on the upper section of the stirring shaft. A second driving motor is provided inside the fixed box, and the second driving motor is connected to the transmission rod through a split electromagnetic coupling; A first linkage mechanism for driving the opening and closing valve of the detergent injection pipe to intermittently open and close when the stirring shaft rotates; A second linkage mechanism for driving the opening and closing valve of the slurry injection pipe to intermittently open and close when the stirring shaft rotates forward, and keeping the opening and closing valve of the slurry injection pipe closed when rotating in the reverse direction.

2. The lithium bis(fluorosulfonyl)imide slurry washing device according to claim 1, wherein, The opening and closing valve includes a valve body, a valve core, a valve rod, and a return spring. The valve body is fixedly connected to the detergent injection pipe or the slurry injection pipe. A through hole communicating with the detergent injection pipe or the slurry injection pipe is provided inside the valve body. The valve core is guidingly installed inside the valve body. A valve hole communicating with the through hole is provided on the valve core. The return spring is arranged between the valve body and the valve core to stagger the valve hole of the valve core from the through hole. The valve rod is fixedly connected to the valve core and its end extends horizontally to the outside of the valve body. A contact plate is provided at the end of the valve rod.

3. The lithium bis(fluorosulfonyl)imide slurry washing device according to claim 2, wherein, The first linkage mechanism includes a first gear and a first cam. The first gear is rotatably installed on the washing liquid injection pipe through a first mounting rod. The first cam is rotatably installed on the housing through a first fixing rod. The first gear is fixedly connected to the first cam. A toothed ring matching the first gear is provided on the outer wall of the fixed box.

4. The lithium bis(fluorosulfonyl)imide slurry washing device according to claim 3, characterized in that, The second linkage mechanism includes a second gear, a runner, and a second cam. The second gear is rotatably installed on the slurry injection pipe through a second mounting rod. The second gear meshes with the toothed ring. The second cam is rotatably installed on the housing through a second fixing rod. The runner is coaxially and fixedly connected to the second gear. A ratchet-shaped groove is provided on the lower side of the second cam. The runner is located inside the groove. A pawl matching the ratchet teeth of the groove is provided on the runner.

5. The lithium bis(fluorosulfonyl)imide slurry washing device according to claim 1, characterized in that, A discharge port is provided at the central position of the lower end of the housing. The filter disc has an inverted truncated conical structure. The outer peripheral edge of the filter disc forms a sealed connection with the inner wall of the housing, and the inner peripheral edge forms a circumferential sealed connection around the feed port of the discharge port. An annular chamber is formed between the filter disc and the inner wall of the housing. A filtrate discharge pipe communicating with the annular chamber is provided on the housing.

6. The lithium bis(fluorosulfonyl)imide slurry washing device according to claim 5, characterized in that, The housing includes an upper housing section, a cylindrical housing section, and a lower housing section. The cylindrical housing section and the lower housing section are detachably connected through a flange sealing assembly structure; the filter disc is coaxially arranged in the lower part of the inner cavity of the cylindrical housing section, and an outer annular sealing flange is provided on its outer peripheral edge. The outer annular sealing flange and the flange sealing assembly structure are clamped and sealed.

7. The lithium bis(fluorosulfonyl)imide slurry washing device according to claim 6, characterized in that, The flange sealing and assembling structure includes an upper flange and a lower flange. The upper flange is fixedly and sealingly connected to the lower end of the cylindrical shell section. The lower flange is sealingly and fixedly connected to the upper end of the lower shell section. Sealing gaskets matching the upper flange and the lower flange are respectively arranged on the upper and lower sides of the outer annular sealing flange. An inner annular sealing flange is arranged on the inner peripheral edge of the filter disc. The inner annular sealing flange is fixedly and sealingly connected to the feeding port of the discharge port. A discharge pipe is fixedly and sealingly connected to the discharge port of the discharge port.

8. The lithium bis(fluorosulfonyl)imide slurry washing device according to claim 7, wherein, A plurality of support plates fixedly connected to the lower shell section are arranged on the lower side of the filter disc. An acidity detection device is fixedly connected to the filtrate discharge pipe. A half-pipe jacket is spirally wound on the outer wall of the cylindrical shell section. A heat exchange medium inlet and a heat exchange medium outlet are arranged on the half-pipe jacket.

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