Separating and filtering device for preparing battery-grade lithium carbonate

Abstract

The invention discloses a separating and filtering device for preparing battery-grade lithium carbonate, and particularly relates to the technical field of battery-grade lithium carbonate preparation, the separating and filtering device comprises a support frame, a reaction mechanism is fixedly mounted at the top of the support frame, a primary filtering mechanism is arranged at the bottom end of the reaction mechanism, and a material guide valve is arranged between the reaction mechanism and the primary filtering mechanism; a secondary filtering mechanism is fixedly mounted in the middle of the supporting frame; the first-stage filtering mechanism comprises a first-stage filtering mechanism and a second-stage filtering mechanism, the second-stage filtering mechanism comprises a filtering outer cylinder, the filtering outer cylinder is fixedly mounted in the middle of the supporting frame, a feeding pipe is fixedly mounted in the middle of the top end of the filtering outer cylinder, and a feeding cylinder is fixedly mounted at the top end of the feeding pipe. The reacted solution is subjected to primary filtration and secondary filtration, so that the separation and filtration effect of the reacted solution is improved, and the corresponding filter holes are dredged while filtration is performed, so that the filter holes are prevented from being blocked to affect separation and filtration.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of battery-grade lithium carbonate, in particular to a separation and filtration device for preparing battery-grade lithium carbonate. Background Art

[0002] Battery-grade lithium carbonate is an important raw material for the manufacture of lithium-ion batteries. It has high purity and good chemical properties and is widely used in power batteries for portable electronic devices such as electric vehicles, smart phones, and laptops.

[0003] During the processing and preparation of battery-grade lithium carbonate, some impurities need to be separated and filtered to obtain high-purity battery-grade lithium carbonate. Traditional battery-grade lithium carbonate filtration is generally carried out in the form of a filter mesh. After filtering for a period of time, the filter mesh will become clogged, thereby affecting subsequent filtration operations. The filter mesh needs to be disassembled for replacement or cleaning, resulting in the overall preparation and filtration efficiency of battery-grade lithium carbonate being low. For this reason, we propose a separation and filtration device for preparing battery-grade lithium carbonate to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a separation and filtration device for preparing battery-grade lithium carbonate to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a separation and filtration device for preparing battery-grade lithium carbonate, comprising a support frame, a reaction mechanism is fixedly installed on the top of the support frame, a primary filtration mechanism is provided at the bottom of the reaction mechanism, a material guide valve is provided between the reaction mechanism and the primary filtration mechanism, and a secondary filtration mechanism is fixedly installed in the middle of the support frame;

[0006] The secondary filtering mechanism includes a filter outer cylinder, which is fixedly installed in the middle of the support frame, a feed pipe is fixedly installed in the middle of the top of the filter outer cylinder, a feed cylinder is fixedly installed on the top of the feed pipe, and a discharge pipe is fixedly installed on the bottom of the filter outer cylinder. The middle of the filter outer cylinder and the feed cylinder is rotatably installed with a first shaft, a filter disk is fixedly clamped on the top of the inner side of the filter outer cylinder, the first shaft movably penetrates the filter disk, and a plurality of filter holes are provided on the filter disk, an isolation disk is fixedly clamped on the bottom of the inner side of the feed pipe, the first shaft movably penetrates the isolation disk, a liquid control cylinder is provided on the top of the isolation disk, the liquid control cylinder is fixedly installed on the outside of the first shaft, a plurality of evenly distributed drainage grooves are provided on the isolation disk, and a storage groove used in conjunction with the drainage grooves is provided on the liquid control cylinder.

[0007] Preferably, a push plate is provided at the bottom end of the filter plate, and a plurality of sliding protrusions distributed in a circular array are fixedly installed on one side of the inner wall of the filter outer cylinder close to the push plate, and the push plate is slidably engaged with the outer side of the sliding protrusion, and a clearing needle corresponding to the filter hole is fixedly installed at the top end of the push plate, and the top of the clearing needle is movably engaged in the corresponding filter hole, a flow groove is opened on the push plate, and a spring is provided between the top end of the push plate and the bottom end of the filter plate, and the spring is movably sleeved on the outer side of the first shaft, and a limiting ring is provided at the bottom end of the push plate, and the limiting ring is fixedly sleeved on the outer side of the first shaft.

[0008] Preferably, a driven ring is fixedly installed at the bottom end of the push plate, a driving plate is provided at the bottom end of the driven ring, the driving plate is fixedly installed on the outside of the first shaft, a plurality of evenly distributed driving protrusions are integrally formed at the top end of the driving plate, a plurality of evenly distributed driven protrusions are integrally formed at the bottom end of the driven ring, and the driving protrusions are in contact with the driven protrusions.

[0009] Preferably, a driving frame is provided at the top of the filter disc, and the driving frame is fixedly mounted on the outside of the first axis. A scraper is fixedly mounted on the outside of the driving frame, and the lower surface of the scraper contacts the upper surface of the filter disc, and the end of the scraper contacts the inner wall of the filter outer cylinder.

[0010] Preferably, a first tube is integrally formed at the top of the filter outer cylinder, and a second tube is integrally formed at a side of the top of the filter outer cylinder away from the first tube. The first tube and the second tube are located above the filter plate. A first valve is fixedly installed at a side of the first tube away from the filter outer cylinder, and a second valve is fixedly installed at a side of the second tube away from the filter outer cylinder. A first liquid inlet pipe is fixedly installed at one end of the first valve away from the first tube, and a first sewage discharge pipe is fixedly installed at one end of the second valve away from the second tube.

[0011] Preferably, the primary filtering mechanism includes a filter tube, the material guide valve is fixedly installed on the top of the filter tube, a material guide elbow is fixedly installed on the bottom of the filter tube, the bottom end of the material guide elbow and the top of the feed cylinder are fixedly installed, a filter mesh frame is fixedly clamped on one side of the inner wall of the filter tube close to the material guide elbow, a second sewage pipe is vertically installed on the bottom of the filter tube, a third valve is fixedly installed on one end of the second sewage pipe away from the filter tube, a first connecting head is fixedly installed on one end of the third valve away from the second sewage pipe, a second liquid inlet pipe is vertically installed on the top of the filter tube, a fourth valve is fixedly installed on the top of the second liquid inlet pipe, and a second connecting head is fixedly installed on the top of the fourth valve.

[0012] Preferably, the reaction mechanism includes a reaction outer cylinder, which is fixedly mounted on the top of a support frame, a feed pipe is fixedly mounted on the top of the reaction outer cylinder, a discharge pipe is fixedly mounted on the bottom of the reaction outer cylinder, the guide valve is fixedly mounted on the bottom end of the discharge pipe, a second shaft is rotatably mounted in the middle of the reaction outer cylinder, and a mixing frame is fixedly mounted on the outer side of the second shaft.

[0013] Preferably, the bottom of the first shaft extends out of the bottom end of the filter outer cylinder and is fixedly mounted with a crown gear, a first motor is fixedly mounted on one side of the bottom end of the filter outer cylinder close to the crown gear, a driving gear is fixedly mounted on the driving end of the first motor, and the driving gear is meshingly connected with the crown gear.

[0014] Preferably, the bottom end of the second shaft and the top end of the first shaft are fixedly mounted.

[0015] Preferably, a discharge valve is fixedly mounted on one end of the discharge pipe away from the filter outer cylinder.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting up a primary filtering mechanism and a secondary filtering mechanism, the post-reaction solution is subjected to primary filtration and secondary filtration to improve the separation and filtration effect of the post-reaction solution. While filtering, the corresponding filter holes are unblocked to prevent the filter holes from being blocked and affecting the separation and filtration.

[0018] 2. By setting up a primary filtering mechanism and a secondary filtering mechanism, impurities on the upper surface of the filter frame and impurities on the filter disc can be washed, thereby improving the use effect of the device.

[0019] 3. The reaction mechanism can be used in conjunction with the setting to simultaneously accelerate the reaction of lithium carbonate raw materials and carbon dioxide and improve the reaction efficiency.

[0020] 4. By setting up a secondary filtering mechanism, the reaction solution after primary filtration can be indirectly introduced into the filter outer cylinder for secondary filtration. Compared with the traditional method of introducing a large amount of solution into the filter outer cylinder, indirect feeding can reduce the filtration load of the filter disc and improve the filtration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the structural connection of the reaction mechanism, the primary filtering mechanism and the secondary filtering mechanism in the present invention.

[0024] Figure 3 It is a structural schematic diagram of the secondary filtering mechanism in the present invention.

[0025] Figure 4 It is a partial structural connection diagram of the secondary filtering mechanism in the present invention.

[0026] Figure 5 It is a partial structural connection diagram of the secondary filtering mechanism in the present invention.

[0027] Figure 6 It is a partial structural connection diagram of the secondary filtering mechanism in the present invention.

[0028] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle.

[0029] Figure 8 It is a structural schematic diagram of the primary filtering mechanism in the present invention.

[0030] Fig. 9 It is a structural schematic diagram of the reaction mechanism in the present invention.

[0031] In the figure: 1, support frame; 2, reaction mechanism; 3, primary filtering mechanism; 4, secondary filtering mechanism; 5, guide valve; 41, filter outer cylinder; 411, feed pipe; 412, feed cylinder; 413, discharge pipe; 414, discharge valve; 42, first shaft; 421, limit ring; 422, crown gear; 423, first motor; 424, drive gear; 43, filter plate; 431, filter hole; 44, isolation plate; 401, dredging groove; 441, liquid control cylinder; 402, storage groove; 45, push plate; 451, card slide convex; 452, dredging needle; 453, flow groove; 46, spring; 47, Driven ring; 471, driven cam; 472, driving disk; 473, driving cam; 48, driving frame; 481, scraper; 49, first tube; 491, second tube; 492, first valve; 493, second valve; 494, first liquid inlet pipe; 495, first sewage discharge pipe; 31, filter tube; 32, guide elbow; 33, filter screen frame; 34, second sewage discharge pipe; 341, third valve; 342, first connector; 35, second liquid inlet pipe; 351, fourth valve; 352, second connector; 21, reaction outer cylinder; 211, feed pipe; 212, discharge pipe; 22, second shaft; 23, mixing rack. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example: Figure 1-9 As shown, the present invention provides a separation and filtration device for preparing battery-grade lithium carbonate, comprising a support frame 1, a reaction mechanism 2 is fixedly installed on the top of the support frame 1, a primary filtration mechanism 3 is provided at the bottom of the reaction mechanism 2, a material guide valve 5 is provided between the reaction mechanism 2 and the primary filtration mechanism 3, and a secondary filtration mechanism 4 is fixedly installed in the middle of the support frame 1;

[0034] The reaction mechanism 2 includes a reaction outer cylinder 21, which is fixedly mounted on the top of the support frame 1, a feed pipe 211 is fixedly mounted on the top of the reaction outer cylinder 21, a discharge pipe 212 is fixedly mounted on the bottom of the reaction outer cylinder 21, and the guide valve 5 is fixedly mounted on the bottom end of the discharge pipe 212. A second shaft 22 is rotatably mounted in the middle of the reaction outer cylinder 21, and a mixing frame 23 is fixedly mounted on the outer side of the second shaft 22. When in use, lithium carbonate raw material and carbon dioxide are introduced into the reaction outer cylinder 21 through the feed pipe 211, and carbon dioxide is introduced to convert lithium carbonate with a lower solubility into lithium bicarbonate with a higher solubility, and most impurities are not hydrogenated to form insoluble carbonates, wherein the second shaft 22 is controlled to drive the mixing frame 23 to rotate, thereby accelerating the reaction of the lithium carbonate raw material and carbon dioxide and improving the reaction efficiency;

[0035] The primary filtering mechanism 3 includes a filter tube 31, and the guide valve 5 is fixedly installed at the top of the filter tube 31. After the lithium carbonate raw material reacts, the guide valve 5 is controlled to open, and the reacted solution is introduced into the filter tube 31 through the guide valve 5. A guide elbow 32 is fixedly installed at the bottom of the filter tube 31, and a filter frame 33 is fixedly clamped on one side of the inner wall of the filter tube 31 close to the guide elbow 32. The solution introduced into the filter tube 31 is primary separated and filtered through the filter frame 33, and impurities are retained on the upper surface of the filter frame 33. A second sewage pipe 34 is vertically installed at the bottom of the filter tube 31, and a third valve 341 is fixedly installed at one end of the second sewage pipe 34 away from the filter tube 31, and the third valve 341 is fixedly clamped at one end away from the second sewage pipe 34. A first connector 342 is fixedly installed, a second liquid inlet pipe 35 is vertically installed on the top of the filter tube 31, a fourth valve 351 is fixedly installed on the top of the second liquid inlet pipe 35, and a second connector 352 is fixedly installed on the top of the fourth valve 351. When in use, the end of the second connector 352 is connected to the output end of the cleaning liquid output system. After the filter frame 33 has been filtered for a period of time, the cleaning liquid output system is controlled to open and the third valve 341 and the fourth valve 351 are opened. The cleaning liquid is introduced into the filter tube 31 through the second connector 352 and the second liquid inlet pipe 35 to flush impurities on the upper surface of the filter frame 33. The flushed impurities are discharged through the second sewage pipe 34 and the first connector 342 to automatically clean the impurities in the filter tube 31.

[0036] The secondary filtering mechanism 4 includes a filter outer cylinder 41, which is fixedly installed in the middle of the support frame 1, a feed pipe 411 is fixedly installed in the middle of the top of the filter outer cylinder 41, a feed cylinder 412 is fixedly installed at the top of the feed pipe 411, the bottom end of the guide elbow 32 and the top of the feed cylinder 412 are fixedly installed, and the reacted solution is introduced into the feed pipe 411 through the guide elbow 32 and the feed cylinder 412 after primary filtration;

[0037] The middle part of the filter outer cylinder 41 and the feed cylinder 412 is rotatably mounted with a first shaft 42, the inner top of the filter outer cylinder 41 is fixedly clamped with a filter disc 43, the first shaft 42 movably penetrates the filter disc 43, and a plurality of filter holes 431 are provided on the filter disc 43, the inner bottom of the feed pipe 411 is fixedly clamped with an isolation disc 44, the first shaft 42 movably penetrates the isolation disc 44, and a liquid control cylinder 441 is provided on the top of the isolation disc 44, the liquid control cylinder 441 is fixedly mounted on the outer side of the first shaft 42, a plurality of evenly distributed drainage grooves 401 are provided on the isolation disc 44, and a material storage groove 402 used in conjunction with the drainage grooves 401 is provided on the liquid control cylinder 441, and the liquid control is driven by controlling the rotation of the first shaft 42 The cylinder 441 rotates, and when the storage groove 402 and the diversion groove 401 correspond, the solution after primary filtration is introduced into the filter outer cylinder 41 through the storage groove 402 and the diversion groove 401, and the first shaft 42 continues to rotate, the storage groove 402 and the diversion groove 401 are staggered, and the solution after primary filtration cannot be introduced into the filter outer cylinder 41 through the storage groove 402 and the diversion groove 401, thereby realizing the indirect feeding of the solution after primary filtration into the filter outer cylinder 41. The solution indirectly introduced into the filter outer cylinder 41 can be secondary filtered through the filter disc 43, and the filtered impurities are retained on the filter disc 43. Compared with the traditional method of introducing a large amount of solution into the filter outer cylinder 41, the indirect feeding can reduce the filtering load of the filter disc 43 and improve the filtering effect.

[0038] The bottom end of the filter disc 43 is provided with a push disc 45, and a plurality of sliding protrusions 451 distributed in an annular array are fixedly installed on the inner wall of the filter outer cylinder 41 near the push disc 45. The push disc 45 is slidably engaged with the outer side of the sliding protrusion 451, and a dredging needle 452 corresponding to the filter hole 431 is fixedly installed on the top of the push disc 45. The top of the dredging needle 452 is movably engaged in the corresponding filter hole 431. A through-flow groove 453 is provided on the push disc 45. The top of the push disc 45 and the bottom of the filter disc 43 are connected. A spring 46 is provided between the push plate 45 and the first shaft 42. The spring 46 is movably sleeved on the outside of the first shaft 42. A limiting ring 421 is provided at the bottom end of the push plate 45. The limiting ring 421 is fixedly sleeved on the outside of the first shaft 42. The limiting ring 421 limits the bottom end of the push plate 45. A driven ring 47 is fixedly installed at the bottom end of the push plate 45. A driving disk 472 is provided at the bottom end of the driven ring 47. The driving disk 472 is fixedly installed on the outside of the first shaft 42. The top of the driving disk 472 is integrally formed with multiple uniformly distributed The bottom end of the driven ring 47 is integrally formed with a plurality of evenly distributed driven protrusions 471. The driving protrusions 473 are in contact with the driven protrusions 471. When the first shaft 42 rotates, the driving disk 472 is controlled to rotate synchronously, thereby driving the plurality of driving protrusions 473 to rotate. When the driving protrusions 473 contact the driven protrusions 471, the driven protrusions 471, the driven ring 47, the push disk 45 and the dredging needle 452 can be lifted up, and the spring 46 can be squeezed. At this time, the dredging needle 452 can be inserted into the driven protrusions 471. In the filter hole 431, the corresponding filter hole 431 is dredged to prevent the filter hole 431 from being blocked and affecting the separation and filtration. The dredged impurities are placed on the filter plate 43, and the driving plate 472 continues to rotate, driving the multiple driving protrusions 473 to continue to rotate, and the driving protrusions 473 do not contact the driven protrusions 471. The spring 46 resets and pushes the push plate 45 and the dredging needle 452 to move downward, and the dredging needle 452 is separated from the filter hole 431, and the filter hole 431 continues to filter, thereby realizing the synchronous dredging of the filter holes 431 on the filter plate 43;

[0039] A driving frame 48 is provided at the top of the filter disc 43, and the driving frame 48 is fixedly mounted on the outside of the first shaft 42. A scraper 481 is fixedly mounted on the outside of the driving frame 48, and the lower surface of the scraper 481 contacts the upper surface of the filter disc 43, and the end of the scraper 481 contacts the inner wall of the filter outer cylinder 41. When the first shaft 42 rotates, the driving frame 48 and the scraper 481 are controlled to rotate synchronously, and the scraper 481 scrapes and gathers the impurities dredged to the filter disc 43 to prevent clogging.

[0040] A discharge pipe 413 is fixedly installed at the bottom of the filter outer cylinder 41, and a discharge valve 414 is fixedly installed at one end of the discharge pipe 413 away from the filter outer cylinder 41. After the secondary filtration, the discharge valve 414 is controlled to open, and the separated and filtered solution is discharged through the discharge pipe 413. The solution is subsequently heated to decompose it to generate battery-grade lithium carbonate;

[0041] A first tube 49 is integrally formed on the top of the filter outer cylinder 41, and a second tube 491 is integrally formed on the side of the top of the filter outer cylinder 41 away from the first tube 49. The first tube 49 and the second tube 491 are located above the filter disc 43. A first valve 492 is fixedly installed on the side of the first tube 49 away from the filter outer cylinder 41, and a second valve 493 is fixedly installed on the side of the second tube 491 away from the filter outer cylinder 41. A first liquid inlet pipe 494 is fixedly installed on one end of the first valve 492 away from the first tube 49, and the second valve 493 is fixedly installed on the side of the second tube 491 away from the filter outer cylinder 41. A first drain pipe 495 is fixedly installed at one end of 93 away from the second tube 491, and the end of the first liquid inlet pipe 494 is connected to the output end of the cleaning liquid output system. After a period of separation and filtration, the cleaning liquid output system, the first valve 492 and the second valve 493 are controlled to open, and the cleaning liquid is introduced into the top of the filter outer cylinder 41 through the first liquid inlet pipe 494 and the first tube 49 to flush the impurities on the filter disc 43. The flushed impurities are discharged through the second tube 491 and the first drain pipe 495, and the impurities in the filter outer cylinder 41 are automatically cleaned.

[0042] The bottom of the first shaft 42 extends out of the bottom end of the filter outer cylinder 41 and is fixedly installed with a crown gear 422. The first motor 423 is fixedly installed on the side of the bottom end of the filter outer cylinder 41 close to the crown gear 422. The driving end of the first motor 423 is fixedly installed with a driving gear 424, and the driving gear 424 and the crown gear 422 are meshingly connected; the bottom end of the second shaft 22 and the top end of the first shaft 42 are fixedly installed. When in use, the first motor 423 is controlled to turn on the driving gear 424 to drive the crown gear 422 to rotate, thereby controlling the first shaft 42 to rotate, and synchronously controlling the second shaft 22 to rotate.

[0043] Working principle: When in use, connect the end of the second connector 352 to the output end of the cleaning liquid output system, and connect the end of the first liquid inlet pipe 494 to the output end of the cleaning liquid output system;

[0044] Subsequently, the first motor 423 is controlled to start driving the driving gear 424 to drive the crown gear 422 to rotate, thereby controlling the first shaft 42 to rotate, and synchronously controlling the second shaft 22 to rotate;

[0045] The lithium carbonate raw material and carbon dioxide are introduced into the reaction outer cylinder 21 through the feed pipe 211, and the carbon dioxide is introduced to convert the lithium carbonate with lower solubility into lithium bicarbonate with higher solubility, and most of the impurities are not hydrogenated to form insoluble carbonates, wherein the second shaft 22 is controlled to drive the mixing frame 23 to rotate, thereby accelerating the reaction of the lithium carbonate raw material and carbon dioxide and improving the reaction efficiency;

[0046] After the lithium carbonate raw material reacts, the guide valve 5 is controlled to be opened, and the reacted solution is introduced into the filter tube 31 through the guide valve 5. The solution introduced into the filter tube 31 is primary separated and filtered through the filter frame 33, and impurities are retained on the upper surface of the filter frame 33. After the filter frame 33 has filtered for a period of time, the cleaning liquid output system is controlled to be opened and the third valve 341 and the fourth valve 351 are opened. The cleaning liquid is introduced into the filter tube 31 through the second connector 352 and the second liquid inlet pipe 35 to wash the impurities on the upper surface of the filter frame 33. The washed impurities are discharged through the second sewage pipe 34 and the first connector 342 to automatically clean the impurities in the filter tube 31.

[0047] After primary filtration, the reacted solution is introduced into the feed pipe 411 through the guide elbow 32 and the feed cylinder 412. The first shaft 42 is controlled to rotate to drive the liquid control cylinder 441 to rotate. When the storage groove 402 and the diversion groove 401 correspond to each other, the solution after primary filtration is introduced into the filter outer cylinder 41 through the storage groove 402 and the diversion groove 401. The first shaft 42 continues to rotate, and the storage groove 402 and the diversion groove 401 are staggered. The solution after primary filtration cannot be introduced into the filter outer cylinder 41 through the storage groove 402 and the diversion groove 401, thereby realizing the indirect feeding of the solution after primary filtration into the filter outer cylinder 41. The solution indirectly introduced into the filter outer cylinder 41 can be secondary filtered through the filter disc 43, and the filtered impurities are retained on the filter disc 43. Compared with the traditional method of introducing a large amount of solution into the filter outer cylinder 41, the indirect feeding can reduce the filtering load of the filter disc 43 and improve the filtering effect.

[0048] When the first shaft 42 rotates, the driving disk 472 is controlled to rotate synchronously, thereby driving the multiple driving protrusions 473 to rotate, and cooperate with the multiple driven protrusions 471. When the driving protrusion 473 contacts the driven protrusion 471, the driven protrusion 471, the driven ring 47, the push disk 45 and the dredging needle 452 can be lifted up, and the spring 46 can be squeezed. At this time, the dredging needle 452 can be inserted into the corresponding filter hole 431 to dredge the corresponding filter hole 431 to prevent the filter hole 431 from being blocked and affecting the separation and filtration. The dredged impurities are placed on the filter disk 43, and the driving disk 472 continues to rotate, driving the multiple driving protrusions 473 to continue to rotate, the driving protrusion 473 does not contact the driven protrusion 471, the spring 46 resets and pushes the push disk 45 and the dredging needle 452 to move downward, the dredging needle 452 is separated from the filter hole 431, and the filter hole 431 continues to filter, thereby realizing the synchronous dredging of the filter holes 431 on the filter disk 43;

[0049] When the first shaft 42 rotates, the driving frame 48 and the scraper 481 are controlled to rotate synchronously, and the scraper 481 collects the impurities that have been dredged onto the filter disc 43 to prevent blockage;

[0050] After a period of separation and filtration, the cleaning liquid output system, the first valve 492 and the second valve 493 are controlled to open, and the cleaning liquid is introduced into the top of the filter outer cylinder 41 through the first liquid inlet pipe 494 and the first pipe 49 to flush the impurities on the filter disc 43. The flushed impurities are discharged through the second pipe 491 and the first sewage pipe 495 to automatically clean the impurities in the filter outer cylinder 41.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A separation and filtration device for preparing battery-grade lithium carbonate, comprising a support frame (1), characterized in that: A reaction mechanism (2) is fixedly mounted on the top of the support frame (1); a primary filtering mechanism (3) is provided at the bottom of the reaction mechanism (2); a material guide valve (5) is provided between the reaction mechanism (2) and the primary filtering mechanism (3); and a secondary filtering mechanism (4) is fixedly mounted in the middle of the support frame (1); The secondary filtering mechanism (4) comprises a filter outer cylinder (41), the filter outer cylinder (41) being fixedly mounted in the middle of the support frame (1), a feed pipe (411) being fixedly mounted in the middle of the top end of the filter outer cylinder (41), a feed cylinder (412) being fixedly mounted in the top end of the feed pipe (411), a discharge pipe (413) being fixedly mounted in the bottom of the filter outer cylinder (41), a first shaft (42) being rotatably mounted in the middle of the filter outer cylinder (41) and the feed cylinder (412), a filter disc (43) being fixedly clamped in the top end of the inner side of the filter outer cylinder (41), and the first shaft (42) ) movably penetrates the filter disc (43), the filter disc (43) is provided with a plurality of filter holes (431), an isolation disc (44) is fixedly clamped on the inner bottom of the feed pipe (411), the first shaft (42) movably penetrates the isolation disc (44), a liquid control cylinder (441) is provided on the top of the isolation disc (44), the liquid control cylinder (441) is fixedly mounted on the outer side of the first shaft (42), the isolation disc (44) is provided with a plurality of evenly distributed drainage grooves (401), and the liquid control cylinder (441) is provided with a material storage groove (402) used in conjunction with the drainage grooves (401).

2. A separation and filtration device for preparing battery-grade lithium carbonate according to claim 1, characterized in that: A push plate (45) is provided at the bottom end of the filter plate (43); a plurality of latching protrusions (451) distributed in an annular array are fixedly mounted on one side of the inner wall of the filter outer cylinder (41) close to the push plate (45); the push plate (45) is slidably latched on the outside of the latching protrusions (451); a dredging needle (452) corresponding to the filter hole (431) is fixedly mounted on the top end of the push plate (45); the top of the dredging needle (452) is movably latched in the corresponding filter hole (431); a through-flow groove (453) is provided on the push plate (45); a spring (46) is provided between the top end of the push plate (45) and the bottom end of the filter plate (43); the spring (46) is movably sleeved on the outside of the first shaft (42); a limiting ring (421) is provided at the bottom end of the push plate (45); the limiting ring (421) is fixedly sleeved on the outside of the first shaft (42).

3. A separation and filtration device for preparing battery-grade lithium carbonate according to claim 2, characterized in that: A driven ring (47) is fixedly mounted on the bottom end of the push plate (45), a driving plate (472) is provided on the bottom end of the driven ring (47), the driving plate (472) is fixedly mounted on the outside of the first shaft (42), a top end of the driving plate (472) is integrally formed with a plurality of evenly distributed driving protrusions (473), a bottom end of the driven ring (47) is integrally formed with a plurality of evenly distributed driven protrusions (471), and the driving protrusions (473) are in contact with the driven protrusions (471).

4. A separation and filtration device for preparing battery-grade lithium carbonate according to claim 1, characterized in that: A driving frame (48) is provided at the top end of the filter disc (43), the driving frame (48) being fixedly mounted on the outside of the first shaft (42), a scraper (481) being fixedly mounted on the outside of the driving frame (48), the lower surface of the scraper (481) being in contact with the upper surface of the filter disc (43), and the end of the scraper (481) being in contact with the inner wall of the filter outer cylinder (41).

5. A separation and filtration device for preparing battery-grade lithium carbonate according to claim 1, characterized in that: A first tube (49) is integrally formed at the top of the filter outer cylinder (41), and a second tube (491) is integrally formed at a side of the top of the filter outer cylinder (41) away from the first tube (49). The first tube (49) and the second tube (491) are located above the filter disc (43). A first valve (492) is fixedly mounted on a side of the first tube (49) away from the filter outer cylinder (41), and a second valve (493) is fixedly mounted on a side of the second tube (491) away from the filter outer cylinder (41). A first liquid inlet tube (494) is fixedly mounted on one end of the first valve (492) away from the first tube (49), and a first sewage discharge tube (495) is fixedly mounted on one end of the second valve (493) away from the second tube (491).

6. A separation and filtration device for preparing battery-grade lithium carbonate according to claim 1, characterized in that: The primary filtering mechanism (3) comprises a filter tube (31), the material guide valve (5) is fixedly mounted on the top of the filter tube (31), a material guide elbow (32) is fixedly mounted on the bottom of the filter tube (31), the bottom end of the material guide elbow (32) and the top of the feed cylinder (412) are fixedly mounted, a filter screen frame (33) is fixedly mounted on the inner wall of the filter tube (31) on one side close to the material guide elbow (32), a second sewage discharge pipe (34) is vertically mounted on the bottom of the filter tube (31), a third valve (341) is fixedly mounted on one end of the second sewage discharge pipe (34) away from the filter tube (31), a first connector (342) is fixedly mounted on one end of the third valve (341) away from the second sewage discharge pipe (34), a second liquid inlet pipe (35) is vertically mounted on the top of the filter tube (31), a fourth valve (351) is fixedly mounted on the top of the second liquid inlet pipe (35), and a second connector (352) is fixedly mounted on the top of the fourth valve (351).

7. A separation and filtration device for preparing battery-grade lithium carbonate according to claim 1, characterized in that: The reaction mechanism (2) comprises a reaction outer cylinder (21), the reaction outer cylinder (21) being fixedly mounted on the top of the support frame (1), a feed pipe (211) being fixedly mounted on the top of the reaction outer cylinder (21), a discharge pipe (212) being fixedly mounted on the bottom of the reaction outer cylinder (21), the guide valve (5) being fixedly mounted on the bottom end of the discharge pipe (212), a second shaft (22) being rotatably mounted on the middle of the reaction outer cylinder (21), and a mixing frame (23) being fixedly mounted on the outer side of the second shaft (22).

8. A separation and filtration device for preparing battery-grade lithium carbonate according to claim 1, characterized in that: The bottom of the first shaft (42) extends out of the bottom end of the filter outer cylinder (41) and is fixedly mounted with a crown gear (422); a first motor (423) is fixedly mounted on a side of the bottom end of the filter outer cylinder (41) close to the crown gear (422); a driving gear (424) is fixedly mounted on a driving end of the first motor (423); the driving gear (424) and the crown gear (422) are meshingly connected.

9. A separation and filtration device for preparing battery-grade lithium carbonate according to claim 7, characterized in that: The bottom end of the second shaft (22) and the top end of the first shaft (42) are fixedly mounted.

10. A separation and filtration device for preparing battery-grade lithium carbonate according to claim 1, characterized in that: A discharge valve (414) is fixedly mounted on one end of the discharge pipe (413) away from the filter outer cylinder (41).

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