Filtering equipment for lithium carbonate production

Abstract

The utility model relates to filtering equipment for lithium carbonate production, which comprises a mixing filter (1), a purifying filter (2) and a liquid transfer pump, a liquid outlet is arranged at the bottom of a tank body (11), and a mixing cavity is formed inside the tank body. The first filter plate is arranged at the upper part of the mixing cavity; the stirring device is used for stirring a mixed solution in the tank body. A water inlet (211) is formed in the top of the box body (21), a filtering cavity is formed in the box body (21), the second filtering plate is arranged on the upper portion of the filtering cavity, the third filtering plate is arranged in the filtering cavity and located below the second filtering plate, and the hole diameters of filtering holes of the first filtering plate, the second filtering plate and the third filtering plate are sequentially decreased. And an inlet and an outlet of the pipetting pump are respectively communicated with the liquid outlet and the water inlet (211). The filtering holes in the filtering plate can be prevented from being blocked, so that the filtering efficiency and the filtering effect are improved.

Description

Technical Field

[0001] The utility model relates to filtering equipment for lithium carbonate production, in particular to the structure of the filtering equipment for lithium carbonate production. Background Art

[0002] Lithium, with its high specific heat, high electrical conductivity, and strong chemical activity, is widely used in lithium batteries, refrigerants, lubricants, and other fields. With the rapid development of new energy vehicles, the demand for lithium is increasing. Lithium extraction from salt lake brine, with its advantages of abundant resources and low cost, is the primary raw material for the production of lithium products. When producing lithium products from salt lake brine, it is mixed with lithium precipitation mother liquor for slurry preparation. After purification and impurity removal, a high-lithium solution rich in lithium ions is obtained. This solution is then reacted with sodium carbonate solution to produce lithium carbonate products. Finally, the lithium carbonate products are used as raw materials to prepare high-purity lithium chloride, lithium hydroxide, lithium metal, and lithium battery positive electrode materials.

[0003] Salt lake brine inevitably contains impurities such as branches and algae, as well as solid impurities such as soil and sand. If these impurities enter subsequent production units, they can clog the equipment's filter cloths, reducing brine flow and increasing filtration pressure within the production units. This requires frequent backwashing, resulting in a low yield of qualified mother liquor, reduced product quality and yield, and deviations from design specifications. Furthermore, impurities in the brine can cause mechanical damage to the equipment and membrane components, shortening its service life.

[0004] Therefore, it is necessary to filter the salt lake brine to remove these impurities to ensure the smooth progress of subsequent production and the purity of the final product. In addition, the lithium precipitation mother liquor contains some solid particles formed by crystallization. The existing method usually mixes the salt lake brine with the lithium precipitation mother liquor to form a mixed solution and filters the mixed solution. Due to the large number of impurities in the mixed solution and the different sizes of different impurities, the filter holes on the filter plate of the existing filtration equipment are easily clogged when filtering the mixed solution, resulting in frequent shutdowns to clear the filter holes, which is time-consuming and labor-intensive, and the filtration effect is poor, affecting the normal filtration production.

[0005] The utility model aims to solve the problem that when a mixed solution for lithium carbonate production is filtered, the filter holes of the existing filtering equipment are easily clogged and the filtering effect is poor. Utility Model Content

[0006] To address the above-mentioned problems, the present invention provides a filtration device for lithium carbonate production, comprising a mixing filter 1, a purification filter 2, and a pipetting pump 3. The mixing filter 1 comprises a tank body 11, a first filter plate 12, and a stirring device 13. The tank body 11 is provided with a liquid inlet 111 at the top and a liquid outlet 112 at the bottom, forming a mixing chamber 113 therein. The first filter plate 12 is provided above the mixing chamber 113, and the stirring device 13 is provided on the tank body 11 for stirring the mixed solution in the tank body 11.

[0007] The purification filter 2 includes a box body 21, a second filter plate 22 and a third filter plate 23. A water inlet 211 is provided on the top of the box body 21, a water outlet 212 is provided at the bottom, and a filter cavity 213 is formed inside. The second filter plate 22 is provided on the upper part of the filter cavity 213, and the third filter plate 23 is provided in the filter cavity 213, located below the second filter plate 22. The apertures of the filter holes of the first filter plate 12, the filter holes of the second filter plate 22 and the filter holes of the third filter plate 23 become smaller in sequence. The inlet and outlet of the pipetting pump 3 are respectively connected to the liquid outlet 112 of the tank body 11 and the water inlet 211 of the box body 21.

[0008] When the present utility model is used, the salt lake brine is mixed with the lithium precipitation mother liquor to form a mixed solution, which is added to the tank body 11 from the liquid inlet 111, filtered by the first filter plate 12, and falls into the bottom of the mixing chamber 113. The larger impurities such as branches and algae in the mixed solution are blocked by the first filter plate 12. Under the stirring action of the stirring device 13, the salt lake brine and the lithium precipitation mother liquor are evenly mixed, and the solid impurities in the mixed solution are dispersed, preventing the solid impurities from settling at the bottom of the mixing chamber 113. The pipette pump 3 pumps the mixed solution in the mixing chamber 113 into the box body 21, and the mixed solution is filtered through the second filter plate 22 and the third filter plate 23 in turn, falls into the bottom of the filter chamber 213, and is discharged from the water outlet 212. The second filter plate 22 filters the solid impurities with larger particle sizes in the mixed solution, and the third filter plate 23 filters the solid impurities with smaller particle sizes in the mixed solution.

[0009] The utility model provides a first filter plate 12 in a mixing tank, and provides a second filter plate 22 and a third filter plate 23 in a housing 21. The pore sizes of the filter holes of the first filter plate 12, the second filter plate 22, and the third filter plate 23 are successively smaller, so that the mixed solution is filtered out of larger impurities such as branches and algae through the first filter plate 12, filtered out of larger solid impurities through the second filter plate 22, and filtered out of smaller solid impurities through the third filter plate 23. By filtering impurities in descending order of volume, clogging of the filter holes on the filter plates can be prevented, thereby improving filtration efficiency and filtration effect.

[0010] The stirring device 13 can evenly mix the salt lake brine and the lithium precipitation mother liquor, disperse the solid impurities in the mixed solution, improve the impurity filtration efficiency, and prevent the precipitation and accumulation of solid impurities, which would cause the filtration holes of the second filter plate 22 and the third filter plate 23 to be blocked. This solves the problem that the filter holes of the existing filtration equipment are easily blocked and the filtration effect is poor when filtering the mixed solution used in the production of lithium carbonate.

[0011] Preferably, the top of the tank body 11 is open, and the opening is sealed by a top cover 114, and the liquid inlet 111 is provided on the top cover 114. By providing the top opening of the tank body 11 and sealing it with the top cover 114, opening the top cover 114 can clean larger impurities such as branches and algae on the first filter plate 12, thereby improving the filtration efficiency.

[0012] Preferably, the stirring device 13 includes a stirring motor 131, a stirring rod 132 and a stirring blade 133. The stirring motor 131 is arranged at the bottom of the box body 21, and the stirring rod 132 is arranged vertically. The lower end is fixedly connected to the rotating shaft of the stirring motor 131, and the upper end extends through the tank body 11 to the mixing chamber 113 and is located below the first filter plate 12. The stirring blade 133 is fixedly set on the stirring rod 132.

[0013] Preferably, a support ring 115 is fixedly provided on the upper portion of the inner side wall of the tank body 11, and a buckle 121 corresponding to the support ring 115 is provided on the outer periphery of the first filter plate 12. The first filter plate 12 is mounted on the support ring 115 via the buckle 121. By fixing the support ring 115 on the upper portion of the inner side wall of the tank body 11 and mounting the first filter plate 12 on the support ring 115 via the buckle 121, the first filter plate 12 can be easily disassembled and cleaned, and the filter holes of the first filter plate 12 can be prevented from being clogged.

[0014] Preferably, a slag discharge port 214 is provided on the right side wall of the box body 21 at a position corresponding to the third filter plate 23 . The slag discharge port 214 is long and extends in the front-to-back direction. The lower end of the slag discharge port 214 is flush with the top surface of the third filter plate 23 .

[0015] By providing a slag discharge port 214 on the right side wall of the box body 21 at a position corresponding to the third filter plate 23 , solid impurities on the third filter plate 23 can be easily discharged, thereby improving the filtering efficiency and preventing the filter holes of the third filter plate 23 from being clogged.

[0016] Preferably, the cleaning system further includes a scraping device 4, comprising a scraping motor 41, a scraping plate 42, a positioning rod 43, and a screw 44. The scraping motor 41 is fixedly mounted on the outer wall of the housing 21. The scraping plate 42 is vertically mounted within the filter cavity 213 and extends in the front-to-back direction. The scraping plate 42 is provided with a positioning hole corresponding to the positioning rod 43 and a threaded hole corresponding to the screw 44. The lower end of the scraping plate 42 is adjacent to the third filter plate 23. The positioning rod 43 is disposed within the filter cavity 213 and extends in the left-right direction. The positioning rod 43 passes through the positioning hole and is fixedly connected to the inner wall of the housing 21 at both ends. The screw 44 is disposed within the filter cavity 213 and extends in the left-right direction. The screw 44 passes through the threaded hole and is rotatably connected to the inner wall of the housing 21 at both ends. The end of the screw 44 proximal to the scraping motor 41 extends through the housing 21 to the outside of the housing 21 and is connected to the scraping motor 41.

[0017] By arranging a scraping device 4 on the box body 21, the lower end of the scraping plate 42 is close to the third filter plate 23. When the screw 44 is driven to rotate by the scraping motor 41, the scraping plate 42 can be driven to slide back and forth along the positioning rod 43 in the left and right directions, thereby scraping the impurities on the third filter plate 23, and scraping the solid impurities on the third filter plate 23 to the slag discharge port 214 and then discharging them, thereby preventing the solid impurities from accumulating on the third filter plate 23 and causing the filter holes of the third filter plate 23 to be blocked, thereby improving the filtration efficiency.

[0018] Preferably, a vibration device 5 is further included, comprising a limit plate 51, a vibration rod 52, a vibration spring 53, and a camshaft 54. The second filter plate 22 is arranged at an angle and connected to the inner wall of the housing 21 via a plurality of support springs 221. The lower side of the second filter plate 22 is spaced apart from the inner wall of the housing 21. The support springs 221 are arranged vertically, with the upper ends fixedly connected to the second filter plate 22 and the lower ends fixedly connected to the inner wall of the housing 21 via support blocks 222.

[0019] The limiting plate 51 is fixedly arranged on the inner wall of the box body 21, above the second filter plate 22. A vibration hole corresponding to the vibration rod 52 is provided on the limiting plate 51. The vibration rod 52 is vertically arranged, and the lower end is fixedly connected to the second filter plate 22. The upper end passes through the vibration hole and extends to above the limiting plate 51. A convex panel 521 is provided at the end. The vibration spring 53 is sleeved on the vibration rod 52, and the two ends are respectively abutted against the convex panel 521 and the limiting plate 51. The camshaft 54 ​​is horizontally arranged and rotatably connected to the box body 21. One end extends to above the convex panel 521. A cam 55 is provided at the end. The other end passes through the box body 21 and extends to the outside of the box body 21 and is connected to the scraping motor 41.

[0020] By arranging a vibration device 5 on the box body 21, the second filter plate 22 is tilted and arranged. The bottom of the second filter plate 22 is connected to the box body 21 through a plurality of support springs 221. The lower side of the second filter plate 22 maintains a distance from the inner wall of the box body 21. The lower end of the vibration rod 52 is fixedly connected to the second filter plate 22, and a convex panel 521 is provided at the upper end. When the scraping motor 41 drives the cam shaft 54 ​​to rotate, the cam 55 on the cam shaft 54 ​​drives the second filter plate 22 to vibrate continuously through the vibration rod 52, so that the solid impurities on the second filter plate 22 fall onto the second filter plate 22 and are discharged from the slag discharge port 214, thereby preventing the solid impurities from accumulating on the second filter plate 22 and causing the filter holes of the second filter plate 22 to be blocked, thereby improving the filtration efficiency.

[0021] Preferably, a slag discharge cover 215 is provided on the slag discharge port 214. Impurities can be discharged regularly through the slag discharge cover 215.

[0022] Preferably, a mounting plate 6 is further included, and the box body 21 and the tank body 11 are fixedly arranged on the mounting plate 6.

[0023] Preferably, the stirring device 13 also includes a scraping frame 134, which is a rectangular frame and is arranged in the mixing chamber 113, below the first filter plate 12. The middle part of the scraping frame 134 is fixedly connected to the stirring rod 132, the side of the scraping frame 134 is close to the inner wall of the tank body 11, and the bottom surface of the scraping frame 134 is close to the bottom surface of the tank body 11.

[0024] By setting up a scraping frame 134, the scraping frame 134 is fixedly connected to the stirring rod 132, the side of the scraping frame 134 is close to the inner wall of the tank body 11, and the bottom of the scraping frame 134 is close to the bottom surface of the tank body 11. The scraping frame 134 can be used to scrape the inner wall and bottom surface of the tank body 11 to prevent solid impurities from adhering to the inner wall of the tank body 11. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 . Schematic diagram of the overall structure of the filtration equipment used in lithium carbonate production;

[0026] Figure 2 . Schematic diagram of the internal structure of the tank and box;

[0027] Figure 3 .Schematic diagram of the internal structure of the tank;

[0028] Figure 4 .Schematic diagram of the internal structure of the box;

[0029] Figure 5 .Schematic diagram of the third filter plate and vibration device structure;

[0030] Figure 6 . Schematic diagram of the coordination structure of the scraper plate, positioning rod and screw;

[0031] Figure 7 . Figure 2 Enlarged schematic diagram of point A in the middle.

[0032] In the figure, 1. Mixing filter, 11. Tank, 111. Liquid inlet, 112. Liquid outlet, 113. Mixing chamber, 114. Top cover, 115. Support ring, 12. First filter plate, 121. Buckle, 13. Stirring device, 131. Stirring motor, 132. Stirring rod, 133. Stirring blade, 134. Scraping frame, 2. Purification filter, 21. Box, 211. Water inlet, 212. Water outlet, 213. Filter chamber, 214. Slag outlet, 215. Slag cover , 22. Second filter plate, 221. Support spring, 222. Support block, 23. Third filter plate, 3. Pipette pump, 31. Connecting tube, 4. Scraping device, 41. Scraping motor, 411. Driving wheel, 42. Scraping plate, 43. Positioning rod, 44. Screw, 441. Second driven wheel, 5. Vibration device, 51. Limiting plate, 52. Vibration rod, 521. Convex panel, 53. Vibration spring, 54. Camshaft, 55. Cam, 56. First driven wheel, 6. Mounting plate. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] like Figure 1 As shown, the filtering equipment for lithium carbonate production includes a mixing filter 1, a purification filter 2, a pipetting pump 3 and a mounting plate 6, and the mixing filter 1 and the purification filter 2 are fixedly arranged on the mounting plate 6.

[0035] like Figure 2 and Figure 3 As shown, the hybrid filter 1 includes a tank body 11 , a first filter plate 12 and a stirring device 13 .

[0036] The tank body 11 has an opening at the top, which is sealed by a top cover 114. The top cover 114 is provided with a liquid inlet 111. The bottom of the tank body 11 is provided with a liquid outlet 112, and a mixing chamber 113 is formed inside. A support ring 115 is fixedly provided on the upper part of the inner wall of the tank body 11.

[0037] The first filter plate 12 is fixedly provided with a support ring 115 on the upper part of the inner wall of the tank body 11. The first filter plate 12 is set on the support ring 115 through a buckle 121, which can facilitate the disassembly and cleaning of the first filter plate 12 and prevent the filter holes of the first filter plate 12 from being blocked.

[0038] The stirring device 13 includes a stirring motor 131, a stirring rod 132, a stirring blade 133 and a scraping frame 134. The stirring motor 131 is arranged at the bottom of the box body 21, and the stirring rod 132 is arranged vertically. The lower end is fixedly connected to the rotating shaft of the stirring motor 131, and the upper end extends through the tank body 11 to the mixing chamber 113 and is located below the first filter plate 12. The stirring blade 133 is fixedly set on the stirring rod 132.

[0039] The scraping frame 134 is a rectangular frame disposed within the mixing chamber 113, below the first filter plate 12. The middle portion of the scraping frame 134 is fixedly connected to the stirring rod 132. The sides of the scraping frame 134 are adjacent to the inner wall of the tank body 11, and the bottom of the scraping frame 134 is adjacent to the bottom surface of the tank body 11. The scraping frame 134 can scrape the inner wall and bottom surface of the tank body 11 to prevent solid impurities from adhering to the inner wall of the tank body 11.

[0040] The stirring device 13 can evenly mix the salt lake brine and the lithium precipitation mother liquor, disperse the solid impurities in the mixed solution, improve the impurity filtration efficiency, and prevent the precipitation and accumulation of solid impurities, which may cause the filter holes of the second filter plate 22 and the third filter plate 23 to be blocked.

[0041] like Figure 2 and Figure 4 As shown, the purification filter 2 includes a housing 21, a second filter plate 22, a third filter plate 23, a scraping device 4 and a vibration device 5. The housing 21 is provided with a water inlet 211 at the top and a water outlet 212 at the bottom, and a filter chamber 213 is formed inside.

[0042] The second filter plate 22 is tiltedly disposed on the upper portion of the filter cavity 213 and connected to the inner wall of the box body 21 via a plurality of support springs 221 . The lower side of the second filter plate 22 maintains a distance from the inner wall of the box body 21 .

[0043] The support spring 221 is vertically arranged, with the upper end fixedly connected to the second filter plate 22 and the lower end fixedly connected to the inner wall of the box body 21 through the support block 222 .

[0044] The third filter plate 23 is disposed in the filter cavity 213 and is located below the second filter plate 22 .

[0045] The pore sizes of the filter holes of the first filter plate 12, the second filter plate 22 and the third filter plate 23 become smaller in sequence. The inlet and outlet of the pipetting pump 3 are connected to the liquid outlet 112 of the tank body 11 and the water inlet 211 of the box body 21 respectively.

[0046] A slag discharge port 214 is provided on the right side wall of the box body 21 at a position corresponding to the third filter plate 23. The slag discharge port 214 is long and extends in the front-to-back direction. The lower end of the slag discharge port 214 is flush with the top surface of the third filter plate 23. A slag discharge cover 215 is provided on the slag discharge port 214.

[0047] Solid impurities on the third filter plate 23 can be discharged through the slag discharge port 214 to improve the filtering efficiency and prevent the filter holes of the third filter plate 23 from being blocked. Impurities can be discharged regularly through the slag discharge cover 215.

[0048] The scraping device 4 includes a scraping motor 41 , a scraping plate 42 , a positioning rod 43 and a screw 44 . The scraping motor 41 is fixedly mounted on the outer wall of the box body 21 , and a driving wheel 411 is mounted on the rotating shaft of the scraping motor 41 .

[0049] The scraping plate 42 is vertically arranged in the filter cavity 213 and extends in the front-to-back direction. The scraping plate 42 is provided with a positioning hole corresponding to the positioning rod 43 and a threaded hole corresponding to the screw 44. The lower end of the scraping plate 42 is close to the third filter plate 23.

[0050] The positioning rod 43 is disposed in the filter cavity 213 and extends in the left-right direction. The positioning rod 43 passes through the positioning hole, and both ends of the positioning rod 43 are fixedly connected to the inner wall of the box body 21 respectively.

[0051] The screw 44 is arranged in the filter chamber 213 and extends in the left and right directions. The screw 44 passes through the threaded hole, and both ends are rotatably connected to the inner wall of the box body 21. The end close to the scraping motor 41 passes through the box body 21 and extends to the outside of the box body 21. A second driven wheel 441 is provided at the end.

[0052] A first driven wheel 56 is provided on the outer side wall of the box body 21 . The first driven wheel 56 is rotatably connected to the box body 21 via a driven shaft. The first driven wheel 56 is connected to the driving wheel 411 via a belt.

[0053] The second driven pulley 441 is connected to the first driven pulley 56 via a belt.

[0054] A scraping device 4 is provided on the box body 21, so that the lower end of the scraping plate 42 is close to the third filter plate 23. When the scraping motor 41 drives the screw 44 to rotate, the scraping plate 42 can be driven to slide back and forth along the positioning rod 43 in the left and right directions, thereby scraping the impurities on the third filter plate 23, scraping the solid impurities on the third filter plate 23 to the slag discharge port 214 and then discharging them, thereby preventing the solid impurities from accumulating on the third filter plate 23 and causing the filter holes of the third filter plate 23 to be blocked, thereby improving the filtration efficiency.

[0055] like Figure 5 、 Figure 6 and Figure 7 As shown, the vibration device 5 includes a limiting plate 51 , a vibration rod 52 , a vibration spring 53 and a cam shaft 54 ​​.

[0056] The limiting plate 51 is fixedly disposed on the inner wall of the box body 21 and is located above the second filter plate 22 . The limiting plate 51 is provided with a vibration hole corresponding to the vibration rod 52 .

[0057] The vibration rod 52 is vertically arranged, with the lower end fixedly connected to the second filter plate 22 and the upper end extending through the vibration hole to above the limit plate 51 , and a convex panel 521 is provided at the end.

[0058] The vibration spring 53 is sleeved on the vibration rod 52 , with two ends thereof respectively contacting the convex panel 521 and the limiting plate 51 .

[0059] The camshaft 54 ​​is arranged horizontally and is rotatably connected to the box body 21 . One end extends to above the convex panel 521 and is provided with a cam 55 at the end. The other end passes through the box body 21 and extends outside the box body 21 to be connected to the scraping motor 41 .

[0060] When the scraping motor 41 drives the camshaft 54 ​​to rotate, the cam 55 on the camshaft 54 ​​drives the second filter plate 22 to vibrate continuously through the vibration rod 52, so that the solid impurities on the second filter plate 22 fall onto the second filter plate 22 and are discharged from the slag discharge port 214, thereby preventing the solid impurities from accumulating on the second filter plate 22 and causing the filter holes of the second filter plate 22 to be blocked, thereby improving the filtration efficiency.

[0061] There are two vibration devices 5, wherein the cam shaft 54 ​​of one vibration device 5 is fixedly connected to the rotating shaft of the sweeping motor 41, and the cam shaft 54 ​​of the other vibration device 5 is fixedly connected to the driven shaft of the first driven wheel 56 (refer to FIG. Figure 2 and Figure 4 ).

[0062] When the utility model is used, salt lake brine and lithium precipitation mother liquor are mixed to form a mixed solution which is added into the tank body 11 through the liquid inlet 111, the pipetting pump 3 and the scraping motor 41 are turned on, and the mixed solution is filtered through the first filter plate 12 and falls into the bottom of the mixing chamber 113, and larger impurities such as branches and algae in the mixed solution are blocked by the first filter plate 12, and the mixed solution in the mixing chamber 113 is stirred by the stirring device 13 to disperse the solid impurities in the mixed solution.

[0063] The pipette pump 3 pumps the mixed solution in the mixing chamber 113 into the box 21. The mixed solution is filtered through the second filter plate 22 and the third filter plate 23 in turn and falls into the bottom of the filter chamber 213 and is discharged from the water outlet 212. The second filter plate 22 filters solid impurities with larger particle sizes in the mixed solution, and the third filter plate 23 filters solid impurities with smaller particle sizes in the mixed solution.

[0064] The scraping motor 41 drives the camshaft 54 ​​and the screw 44 to rotate. The cam 55 on the camshaft 54 ​​drives the second filter plate 22 to vibrate continuously through the vibration rod 52, causing solid impurities on the second filter plate 22 to fall onto the second filter plate 22 and then be discharged from the slag discharge port 214. When the screw 44 rotates, it drives the scraping plate 42 to slide back and forth along the positioning rod 43 in the left and right directions, scraping impurities on the third filter plate 23. The solid impurities on the third filter plate 23 are scraped to the slag discharge port 214 and then discharged.

[0065] The utility model provides a first filter plate 12 in a mixing tank, and provides a second filter plate 22 and a third filter plate 23 in a housing 21. The pore sizes of the filter holes of the first filter plate 12, the second filter plate 22, and the third filter plate 23 are successively smaller, so that the mixed solution is filtered out of larger impurities such as branches and algae through the first filter plate 12, filtered out of larger solid impurities through the second filter plate 22, and filtered out of smaller solid impurities through the third filter plate 23. By filtering impurities in descending order of volume, clogging of the filter holes on the filter plates can be prevented, thereby improving filtration efficiency and filtration effect.

[0066] The stirring device 13 can evenly mix the salt lake brine and the lithium precipitation mother liquor, disperse the solid impurities in the mixed solution, improve the impurity filtration efficiency, and prevent the precipitation and accumulation of solid impurities, which may cause the filter holes of the second filter plate 22 and the third filter plate 23 to be blocked.

[0067] By setting up the scraping device 4, the lower end of the scraping plate 42 is close to the third filter plate 23. When the scraping motor 41 drives the screw 44 to rotate, the scraping plate 42 can be driven to slide back and forth in the left and right directions along the positioning rod 43, thereby scraping the impurities on the third filter plate 23, and scraping the solid impurities on the third filter plate 23 to the slag discharge port 214 and then discharging them, thereby preventing the solid impurities from accumulating on the third filter plate 23 and preventing the filter holes of the third filter plate 23 from being blocked, thereby improving the filtration efficiency.

[0068] By setting the vibration device 5, the second filter plate 22 is tilted, the bottom of the second filter plate 22 is connected to the box body 21 through a plurality of support springs 221, the lower side of the third filter plate 23 maintains a distance from the inner wall of the box body 21, the lower end of the vibration rod 52 is fixedly connected to the second filter plate 22, and a convex panel 521 is provided at the upper end. When the scraping motor 41 drives the cam shaft 54 ​​to rotate, the cam 55 on the cam shaft 54 ​​drives the second filter plate 22 to vibrate continuously through the vibration rod 52, so that the solid impurities on the second filter plate 22 fall onto the second filter plate 22 and are discharged from the slag discharge port 214, thereby preventing the solid impurities from accumulating on the second filter plate 22 and preventing the filter holes of the second filter plate 22 from being blocked, thereby improving the filtration efficiency.

[0069] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims

1. A filtering device for lithium carbonate production, characterized in that: It includes a mixing filter (1), a purification filter (2) and a pipetting pump (3), The hybrid filter (1) comprises a tank body (11), a first filter plate (12) and a stirring device (13). The tank body (11) is provided with a liquid inlet (111) at the top and a liquid outlet (112) at the bottom, and a mixing chamber (113) is formed inside. The first filter plate (12) is arranged on the upper part of the mixing chamber (113); The stirring device (13) is provided on the tank body (11) and is used to stir the mixed solution in the tank body (11); The purification filter (2) comprises a housing (21), a second filter plate (22) and a third filter plate (23). The box body (21) is provided with a water inlet (211) at the top and a water outlet (212) at the bottom, and a filter cavity (213) is formed inside. The second filter plate (22) is arranged on the upper part of the filter cavity (213); The third filter plate (23) is arranged in the filter cavity (213) and is located below the second filter plate (22); The pore sizes of the filter holes of the first filter plate (12), the filter holes of the second filter plate (22), and the filter holes of the third filter plate (23) become smaller in sequence; The inlet and outlet of the liquid transfer pump (3) are respectively connected to the liquid outlet (112) of the tank body (11) and the water inlet (211) of the box body (21).

2. The lithium carbonate production filtering device according to claim 1, wherein The tank body (11) has an opening at the top, which is sealed by a top cover (114). The liquid inlet (111) is arranged on the top cover (114).

3. The lithium carbonate production filtering device according to claim 2, wherein The stirring device (13) includes a stirring motor (131), a stirring rod (132) and a stirring blade (133). The stirring motor (131) is arranged at the bottom of the box (21). The stirring rod (132) is arranged vertically, with its lower end fixedly connected to the rotating shaft of the stirring motor (131), and its upper end extending through the tank body (11) into the mixing chamber (113), and located below the first filter plate (12); The stirring blade (133) is fixedly arranged on the stirring rod (132).

4. The lithium carbonate production filtering equipment according to claim 3, wherein A support ring (115) is fixedly provided on the upper portion of the inner wall of the tank body (11). A buckle (121) corresponding to the support ring (115) is provided on the outer periphery of the first filter plate (12), and the first filter plate (12) is arranged on the support ring (115) via the buckle (121).

5. The lithium carbonate production filtering equipment according to claim 4, wherein A slag discharge port (214) is provided on the right side wall of the box body (21) at a position corresponding to the third filter plate (23). The slag discharge port (214) is in the shape of a long strip and extends in the front-to-back direction, and the lower end of the slag discharge port (214) is flush with the top surface of the third filter plate (23).

6. The lithium carbonate production filtering equipment according to claim 5, wherein It also includes a scraping device (4), The scraping device (4) comprises a scraping motor (41), a scraping plate (42), a positioning rod (43) and a screw (44). The scraping motor (41) is fixedly arranged on the outer side wall of the box body (21); The scraping plate (42) is vertically arranged in the filter cavity (213) and extends in the front-to-back direction. The scraping plate (42) is provided with a positioning hole corresponding to the positioning rod (43) and a threaded hole corresponding to the screw rod (44). The lower end of the scraping plate (42) is close to the third filter plate (23). The positioning rod (43) is arranged in the filter cavity (213) and extends in the left-right direction. The positioning rod (43) passes through the positioning hole, and both ends are fixedly connected to the inner wall of the box body (21). The screw (44) is disposed in the filter cavity (213) and extends in the left-right direction. The screw (44) passes through the threaded hole, and both ends of the screw are rotatably connected to the inner wall of the box (21). The end close to the scraping motor (41) passes through the box (21) and extends to the outside of the box (21) to be connected to the scraping motor (41).

7. The lithium carbonate production filtering equipment according to claim 6, wherein Also includes a vibration device (5), The vibration device (5) includes a limit plate (51), a vibration rod (52), a vibration spring (53) and a cam shaft (54). The second filter plate (22) is arranged at an angle, and the second filter plate (22) is connected to the inner wall of the box body (21) via a plurality of support springs (221), and a lower side of the second filter plate (22) maintains a distance from the inner wall of the box body (21); The support spring (221) is arranged vertically, with the upper end fixedly connected to the second filter plate (22), and the lower end fixedly connected to the inner wall of the box body (21) through the support block (222); The limiting plate (51) is fixedly arranged on the inner wall of the box body (21) and is located above the second filter plate (22). A vibration hole corresponding to the vibration rod (52) is provided on the limiting plate (51); The vibration rod (52) is arranged vertically, with its lower end fixedly connected to the second filter plate (22), its upper end extending through the vibration hole to above the limit plate (51), and a convex panel (521) provided at the end; The vibration spring (53) is sleeved on the vibration rod (52), with its two ends respectively abutting against the convex panel (521) and the limit plate (51); The camshaft (54) is arranged horizontally and is rotatably connected to the box body (21). One end of the camshaft extends above the convex panel (521) and is provided with a cam (55) at the end. The other end of the camshaft passes through the box body (21) and extends outside the box body (21) to be connected to the scraping motor (41).

8. The lithium carbonate production filtering equipment according to claim 7, wherein A slag discharge cover (215) is provided on the slag discharge port (214).

9. The lithium carbonate production filtering equipment according to claim 8, wherein Also included is a mounting plate (6), The box body (21) and the tank body (11) are fixedly arranged on the mounting plate (6).

10. The lithium carbonate production filtering equipment according to any one of claims 1 to 9, characterized in that The stirring device (13) further includes a scraping frame (134), The scraping frame (134) is a rectangular frame, which is arranged in the mixing chamber (113) and is located below the first filter plate (12). The middle part of the scraping frame (134) is fixedly connected to the stirring rod (132). The side surface of the scraping frame (134) is close to the inner wall of the tank body (11), and the bottom surface of the scraping frame (134) is close to the bottom surface of the tank body (11).

Images