Separation device and method for removing calcium from refined lithium liquid

Abstract

The application discloses a lithium liquid calcium removal treatment separation device and method, and belongs to the technical field of lithium liquid calcium removal treatment, wherein the lithium liquid calcium removal treatment separation device comprises an outer shell body, a filter column is fixedly installed inside the outer shell body, a precipitation chamber is fixedly installed at the bottom of the filter column, a partition plate is arranged between the filter column and the precipitation chamber, a stirring mechanism is arranged inside the filter column, and a discharging mechanism is arranged in the middle of the partition plate. The application firstly stirs the sodium carbonate solution and the lithium solution at a low speed through the stirring mechanism, so that the sodium carbonate solution and the lithium solution are mixed, precipitation is generated, and most of calcium ions are removed. Subsequently, high-speed stirring is performed, so that the precipitate falls into the precipitation chamber. The stirring mechanism is closed to seal the discharging mechanism. The solution after the preliminary treatment is subjected to pressurization and filtration, the treatment effect is improved, and stable material output is ensured.

Description

Technical Field

[0001] This invention belongs to the field of lithium liquid calcium removal technology, and particularly relates to a lithium liquid calcium removal treatment and separation device and method. Background Technology

[0002] Lithium sulfate solution is a high-purity lithium solution that has undergone impurity removal and other processes. It usually contains a high concentration of lithium ions. During processing, a calcium removal separation device is used to remove calcium ions from the lithium solution. For example, Chinese Patent Publication No. CN219964865U discloses an intelligent reactor for calcium removal from lithium sulfate solution, which relates to the field of lithium sulfate processing technology. This application, through the arrangement of reaction components, places the heating tube inside the main body of the machine and protects it by a support column. This allows all the heat generated by the heating tube to be absorbed by lithium sulfate and sodium carbonate, which reduces heat consumption and prevents lithium sulfate and sodium carbonate from affecting the service life of the heating tube. At the same time, the support column can support the inner and outer cylinders, and through the meshing of two first bevel gears and two second bevel gears, the inner and outer cylinders rotate in different directions and at different speeds, which intensifies turbulence and improves mixing efficiency, reduces heat consumption and thus reduces the energy consumption of the heating tube, while improving mixing efficiency.

[0003] The problems with the existing technology are: 1. The equipment only removes calcium ions by mixing sodium sulfate and lithium solution, which results in a long reaction time and poor treatment effect; 2. The precipitate and the treated solution are in the same chamber and cannot be separated. During subsequent output, the two will be remixed due to the flow of the solution, which will affect the output. Summary of the Invention

[0004] To address the problems of existing technologies, this invention provides a lithium liquid calcium removal and separation device, which has the advantages of good separation effect, separation of precipitate and treated solution, and convenient and stable output. It solves the problems of existing equipment that remove calcium ions by mixing sodium sulfate and lithium solution, which has a long reaction time, poor treatment effect, and the inability to separate precipitate and treated solution in the same chamber, which will cause the two to remix due to solution flow during subsequent output, affecting the output.

[0005] The present invention is implemented as follows: a lithium liquid calcium removal and separation device includes an outer shell, a filter column fixedly installed inside the outer shell, a sedimentation chamber fixedly installed at the bottom of the filter column, a partition between the filter column and the sedimentation chamber, an inlet pipe and an outlet pipe respectively provided at the upper and lower ends of the outer shell, a stirring mechanism provided inside the filter column, a plurality of spherical blocks provided at the bottom of the partition, and a feeding mechanism provided in the middle of the partition.

[0006] The stirring mechanism includes a motor, a first rotating shaft, and several stirring blades that are equally distributed spirally on the first rotating shaft. The upper end of the first rotating shaft is fixedly connected to the output end of the motor.

[0007] The feeding mechanism includes a second rotating shaft and several support columns circumferentially arranged on the second rotating shaft. The second rotating shaft is fixedly connected to the lower end of the first rotating shaft. Each support column is movably connected to a baffle via a second spring. The baffle abuts against the spherical block.

[0008] As a preferred embodiment of the present invention, the bottom of the outer shell is fixedly installed on the bracket, and an air pipe is provided at the upper end of the outer shell. One end of the air pipe is connected to an external pressure pump, and the other end is connected to the inside of the filter column.

[0009] In a preferred embodiment of the present invention, the inlet pipe is connected to the interior of the filter column, a filtrate chamber is formed between the outer shell and the filter column, and one end of the outlet pipe is connected to the filtrate chamber.

[0010] As a preferred embodiment of the present invention, the motor is fixedly installed at the top center of the outer casing, and a plurality of mounting brackets are arranged circumferentially at the inner edge of the filter column, with a plurality of paddles arranged in a row on each mounting bracket.

[0011] In a preferred embodiment of the present invention, the stirring blade is rotatably mounted on the mounting rod, and a mounting base is fixedly connected to one end of the mounting rod near the first rotating shaft. The first rotating shaft is provided with a plurality of movable grooves arranged spirally at equal intervals. The mounting base is slidably mounted in the movable grooves. A first slide rod and a first spring are fixedly mounted inside the movable grooves. The first spring is sleeved on the first slide rod. The mounting base is slidably connected to the first slide rod and one side is fixedly connected to the first spring.

[0012] As a preferred embodiment of the present invention, an installation ring is fixedly connected to the lower surface of the partition, and a plurality of spherical blocks are equidistantly arranged on the installation ring, and a second sealing groove is provided on the lower outer circumferential surface of the partition.

[0013] As a preferred embodiment of the present invention, a first sealing groove is provided on the outer circumferential surface of the lower end of the second rotating shaft. A first sealing ring, a second sealing ring, and a guide groove are respectively provided on the inner and outer ends and the lower surface of the baffle. The first sealing ring and the second sealing ring abut against the first sealing groove and the second sealing groove, respectively. A guide column and a slider are respectively fixedly connected to the upper surface of the support column and the end away from the second rotating shaft. The guide column is slidably connected in the guide groove.

[0014] In a preferred embodiment of the present invention, a second spring and a second slide rod are fixedly installed inside the lower surface of the baffle and on one side of the guide groove. The slider is slidably sleeved on the second slide rod, and the second spring is sleeved on the second slide rod with one end fixedly connected to the slider.

[0015] As a preferred embodiment of the present invention, a roller is rotatably mounted inside the upper end of the outer edge of the baffle, and an arc-shaped guide block is provided on one side of the roller, and the arc-shaped guide block is fixedly mounted on the baffle.

[0016] This invention also provides a method for using the lithium liquid calcium removal and separation device, specifically including the following steps:

[0017] S1: Initial mixing: Sodium carbonate and lithium liquid to be decalcified are introduced into the filter column. The motor is started to drive the stirring blades to rotate at low speed, so that the sodium carbonate and lithium liquid are mixed and a precipitate is formed after a period of time.

[0018] S2: Sedimentation and conveying. Increase the motor speed to make the baffle open outward due to centrifugal force. The heavier sediment is pushed to the middle of the baffle due to centrifugal force and falls into the sedimentation chamber from the middle of the baffle.

[0019] S3: Filter again, turn off the motor, and let the baffle reset under the action of the second spring. The middle of the baffle is closed. Turn on the external pressure pump to pressurize the inside of the filter column, so that the pre-treated solution passes through the filter column and enters the filtrate chamber, and then flows out from the outlet pipe.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. In this invention, the sodium carbonate solution and lithium solution are first mixed by the low-speed rotation of the motor to produce a precipitate and remove most of the calcium ions. Then, the motor is rotated at high speed to make the precipitate fall into the precipitation chamber. Finally, the motor is turned off to pressurize and filter the pre-treated solution, thereby improving the treatment effect and extending the service life of the filter column.

[0022] 2. This invention uses a paddle to flip and rotate the stirring blade, causing the stirring blade to rotate on the mounting rod as it rotates with the first rotating shaft. This improves the mixing and dispersing ability of the solution, making the stirring more thorough and uniform, and enhancing the stirring quality. By movably mounting the mounting base inside the movable groove, the mounting base can generate a small displacement when the paddle comes into contact with the stirring blade, which can play a buffering role. On the one hand, it can reduce the wear caused by the contact between the stirring blade and the paddle, extending the service life. On the other hand, it can ensure the stability of the stirring blade as it rotates with the first rotating shaft.

[0023] 3. By setting up several baffles for sealing connection, this invention can prevent the solution from entering the sedimentation chamber during the initial mixing. After the precipitate is transported to the sedimentation chamber, it can separate the precipitate from the lithium solution after the initial mixing treatment. This facilitates the simultaneous operation of precipitate discharge and lithium solution re-filtration without interference. The baffles drive the rollers to rotate, and the rollers intermittently contact the spherical blocks, causing the partitions and baffles to vibrate relative to each other. This not only vibrates the precipitate on the surface of the partitions to the central through hole, allowing it to fall into the sedimentation chamber, but also shakes off the precipitate that falls on the surface of the baffles, thereby improving the precipitate discharge efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0025] Figure 2 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention;

[0026] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0027] Figure 4 This is a first-view three-dimensional structural diagram of the material feeding mechanism in the sealed state of the present invention.

[0028] Figure 5 For the present invention Figure 4 Enlarged view of the structure at point B in the middle;

[0029] Figure 6 This is a three-dimensional structural diagram of the feeding mechanism in the sealed state of the present invention from a second perspective.

[0030] Figure 7 This is a top view of the feeding mechanism in the unfolded state in this invention;

[0031] Figure 8 This is a first-view exploded view of the structure of the feeding mechanism in this invention;

[0032] Figure 9 This is a second-view exploded view of the feeding mechanism in this invention.

[0033] In the diagram: 1. Outer shell; 11. Support; 12. Sedimentation chamber; 13. Inlet pipe; 14. Outlet pipe; 15. Partition; 151. Mounting ring; 152. Spherical block; 153. Second sealing groove; 16. Filter column; 2. Stirring mechanism; 21. Motor; 22. First rotating shaft; 221. Movable groove; 222. First sliding rod; 223. First spring; 23. Stirring blade; 231. Mounting rod; 232. Mounting seat; 24. Mounting frame; 25. Paddle; 3. Feeding mechanism; 31. Second rotating shaft; 311. First sealing groove; 32. Support column; 321. Guide column; 33. Sliding block; 34. Second spring; 35. Second sliding rod; 36. Baffle; 361. Roller; 362. Arc-shaped guide block; 363. First sealing ring; 364. Second sealing ring; 365. Guide groove. Detailed Implementation

[0034] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0035] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0036] like Figures 1 to 9As shown, the lithium liquid calcium removal and separation device provided in this embodiment of the invention includes an outer shell 1, a filter column 16 fixedly installed inside the outer shell 1, a sedimentation chamber 12 fixedly installed at the bottom of the filter column 16, a partition 15 between the filter column 16 and the sedimentation chamber 12, an inlet pipe 13 and an outlet pipe 14 respectively provided at the upper and lower ends of the outer shell 1, a stirring mechanism 2 provided inside the filter column 16, a plurality of spherical blocks 152 provided at the bottom of the partition 15, and a feeding mechanism 3 provided in the middle of the partition 15;

[0037] The stirring mechanism 2 includes a motor 21, a first rotating shaft 22 and several stirring blades 23 that are equidistantly distributed on the first rotating shaft 22. The upper end of the first rotating shaft 22 is fixedly connected to the output end of the motor 21.

[0038] The feeding mechanism 3 includes a second rotating shaft 31 and several support columns 32 circumferentially arranged on the second rotating shaft 31. The second rotating shaft 31 is fixedly connected to the lower end of the first rotating shaft 22. Each support column 32 is movably connected to a baffle 36 through a second spring 34. The baffle 36 abuts against the spherical block 152.

[0039] Furthermore, the bottom of the outer shell 1 is fixedly installed on the bracket 11, and an air pipe is provided at the upper end of the outer shell 1. One end of the air pipe is connected to an external pressure pump, and the other end is connected to the inside of the filter column 16. The liquid inlet pipe 13 is connected to the inside of the filter column 16, and a filtrate chamber is formed between the outer shell 1 and the filter column 16. One end of the liquid outlet pipe 14 is connected to the filtrate chamber.

[0040] Specifically, the bracket 11 is used to support and fix the equipment to ensure the stability of the equipment during operation. An external air pump pressurizes the mixed lithium solution to increase the speed at which the solution passes through the filter column 16 and improves the adsorption efficiency. The filter column 16 is made of chelating resin material, which can effectively adsorb calcium ions in the lithium solution. Combined with sodium carbonate for preliminary treatment of the lithium solution, the treatment effect is further improved.

[0041] In use, sodium carbonate solution is introduced into the filter column 16 and mixed with the lithium solution to be treated. The mixture is stirred by the stirring mechanism 2. The outlet valve is closed during stirring. After stirring and precipitation are completed, the outlet valve and the air inlet valve are opened to increase the pressure inside the filter column 16. The lithium solution is accelerated to pass through the filter column 16 and enter the filter chamber, and then flows out from the outlet pipe 14.

[0042] Furthermore, the motor 21 is fixedly installed at the top center of the outer casing 1. Several mounting brackets 24 are arranged circumferentially at the inner edge of the filter column 16. Several paddles 25 are arranged in a row on each mounting bracket 24. The stirring blades 23 are rotatably installed on the mounting rod 231. The end of the mounting rod 231 near the first rotating shaft 22 is fixedly connected to the mounting seat 232. Several movable grooves 221 are spirally and equidistantly arranged on the first rotating shaft 22. The mounting seat 232 is slidably installed in the movable grooves 221. The first slide rod 222 and the first spring 223 are fixedly installed inside the movable grooves 221. The first spring 223 is sleeved on the first slide rod 222. The mounting seat 232 is slidably connected to the first slide rod 222 and one side is fixedly connected to the first spring 223.

[0043] Specifically, the output shaft of motor 21 is rotatably mounted on the upper middle part of the outer casing 1 and the filter column 16, and the lower end extends into the interior of the filter column 16 and is fixedly connected to the top of the first rotating shaft 22. Several mounting rods 231 are mounted on the first rotating shaft 22, and stirring blades 23 are rotatably mounted on the mounting rods 231. By setting the movable groove 221 and the first spring 223, the mounting rods 231 are movably mounted on the first rotating shaft 22. The height of the paddle 25 is adapted to the stirring blades 23. During the process of the first rotating shaft 22 driving the stirring blades 23 to rotate, the stirring blades 23 come into contact with the paddle 25. Since the paddle 25 is fixed and the stirring blades 23 are rotatably set, the stirring blades 23 will rotate on the mounting rods 231, which improves the mixing and dispersion ability of the solution, makes the stirring more thorough and uniform, and improves the stirring quality.

[0044] In this application, by movably mounting the mounting base 232 inside the movable groove 221, when the paddle 25 abuts against the stirring blade 23, the mounting base 232 compresses the first spring 223 and generates a small displacement, which can play a buffering role. Compared with the mounting rod 231 being fixedly mounted on the first rotating shaft 22, it can reduce the wear generated when the stirring blade 23 contacts the paddle 25 and extend its service life. On the other hand, it can ensure the smoothness of the stirring blade 23 rotating with the first rotating shaft 22.

[0045] It should be noted that during the initial mixing, the speed of motor 21 is reduced, and motor 21 drives the first rotating shaft 22 and the second rotating shaft 31 to rotate slowly. The baffle 36 does not expand outward. After precipitation occurs, the speed is increased to create a vortex in the middle of the solution. The precipitate is pushed towards the center under the action of centrifugal force. At the same time, the baffle 36 expands outward, so that the filter column 16 is connected to the middle of the sedimentation chamber 12, which helps the precipitate to enter the sedimentation chamber 12.

[0046] Furthermore, a mounting ring 151 is fixedly connected to the lower surface of the partition 15, and several spherical blocks 152 are equidistantly arranged on the mounting ring 151. A second sealing groove 153 is provided on the lower outer circumference of the partition 15.

[0047] Specifically, the partition 15 can vibrate. When the baffle 36 is not unfolded, the second sealing ring 364 is inserted into the second sealing groove 153. Several baffles 36 abut against each other to seal the middle of the partition 15. The mounting ring 151 and the spherical block 152 are set at the corresponding positions after the baffle 36 is unfolded. After the baffle 36 is unfolded, the spherical block 152 is located on the movement trajectory of the roller 361. The baffle 36 drives the roller 361 to rotate. The roller 361 and the spherical block 152 are in intermittent contact, causing the partition 15 and the baffle 36 to vibrate relative to each other. This not only vibrates the sediment on the surface of the partition 15 to the central through hole and falls into the sedimentation chamber 12 through the through hole, but also shakes off the sediment on the upper surface of the baffle 36, thereby improving the sediment discharge effect.

[0048] Furthermore, a first sealing groove 311 is provided on the outer circumferential surface of the lower end of the second rotating shaft 31. A first sealing ring 363, a second sealing ring 364, and a guide groove 365 are respectively provided on the inner and outer ends and the lower surface of the baffle 36. The first sealing ring 363 and the second sealing ring 364 abut against the first sealing groove 311 and the second sealing groove 153, respectively. A guide post 321 and a slider 33 are respectively fixedly connected to the upper surface of the support column 32 and the end away from the second rotating shaft 31. The guide post 321 is slidably connected in the guide groove 365. A second spring 34 and a second slide rod 35 are fixedly installed inside the lower surface of the baffle 36 and on one side of the guide groove 365. The slider 33 is slidably sleeved on the second slide rod 35. The second spring 34 is sleeved on the second slide rod 35 and one end is fixedly connected to the slider 33. A roller 361 is rotatably installed inside the upper end of the outer edge of the baffle 36. An arc-shaped guide block 362 is provided on one side of the roller 361 and is fixedly installed on the baffle 36.

[0049] Specifically, the baffle 36 is slidably connected to the support column 32. The guide column 321 cooperates with the guide groove 365 to guide the movement of the baffle 36. The first sealing ring 363 and the second sealing ring 364 are sealed to the first sealing groove 311 and the second sealing groove 153 to improve the sealing performance. During the initial mixing, the solution can be prevented from entering the sedimentation chamber 12. After the precipitate is transported into the sedimentation chamber 12, the precipitate can be separated from the lithium solution after the initial mixing treatment. This is conducive to the simultaneous operation of precipitate discharge and lithium solution re-filtration without interference.

[0050] In use, the support column 32 rotates with the second rotating shaft 31, causing the baffle 36 to unfold outward along the support column 32. The arc-shaped guide block 362 first contacts the spherical block 152, pushing the spherical block 152 upward. Then, the roller 361 contacts the spherical block 152. At this time, the baffle 36 unfolds to its maximum. During subsequent rotation, the position of the baffle 36 remains unchanged. By setting the spherical block 152 and the arc-shaped guide block 362, the resistance during contact can be reduced and the smoothness can be improved. By intermittently contacting the roller 361 with the spherical block 152, the baffle 15 can be vibrated during the rotation of the baffle 36. At the same time, the baffle 36 itself will also vibrate, which helps to discharge the sediment on the surface of the baffle 15 and the baffle 36.

[0051] like Figures 1-9 As shown in the embodiment of the present invention, the method of using the lithium liquid calcium removal and separation device includes the following steps:

[0052] In the initial mixing, sodium carbonate and lithium liquid to be decalcified are passed into the filter column 16. The motor 21 is started to drive the stirring blade 23 to rotate at low speed, so that the sodium carbonate and lithium liquid are mixed and a precipitate is formed after a period of time.

[0053] During sedimentation and conveying, the speed of motor 21 is increased, causing baffle 36 to open outward due to centrifugal force. Heavier sediments are pushed to the middle of baffle 15 due to centrifugal force and fall into sedimentation chamber 12 from the middle of baffle 15.

[0054] After filtering again, the motor 21 is turned off, causing the baffle 36 to reset under the action of the second spring 34. The middle part of the partition 15 is closed, and the external pressure pump is turned on to pressurize the inside of the filter column 16, so that the pre-treated solution passes through the filter column 16 and enters the filtrate chamber, and then flows out from the outlet pipe 14.

[0055] In summary, this lithium liquid calcium removal and separation device first uses a low-speed motor 21 to mix the sodium carbonate solution with the lithium solution, producing a precipitate and removing most of the calcium ions. Then, it rotates at high speed to allow the precipitate to fall into the precipitation chamber 12. Finally, the motor 21 is turned off to pressurize and filter the pre-treated solution, improving the treatment effect and extending the service life of the filter column 16.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithium liquid calcium removal and separation device, comprising an outer shell (1), wherein a filter column (16) is fixedly installed inside the outer shell (1), a sedimentation chamber (12) is fixedly installed at the bottom of the filter column (16), a partition (15) is provided between the filter column (16) and the sedimentation chamber (12), and an inlet pipe (13) and an outlet pipe (14) are respectively provided at the upper and lower ends of the outer shell (1), characterized in that: The filter column (16) is equipped with a stirring mechanism (2), the bottom of the partition (15) is provided with a number of spherical blocks (152), and the middle of the partition (15) is provided with a feeding mechanism (3). The stirring mechanism (2) includes a motor (21), a first rotating shaft (22) and a number of stirring blades (23) that are spirally and equally distributed on the first rotating shaft (22). The upper end of the first rotating shaft (22) is fixedly connected to the output end of the motor (21). The feeding mechanism (3) includes a second rotating shaft (31) and several support columns (32) circumferentially arranged on the second rotating shaft (31). The second rotating shaft (31) is fixedly connected to the lower end of the first rotating shaft (22). Each support column (32) is movably connected to a baffle (36) via a second spring (34). The baffle (36) abuts against the spherical block (152). An mounting ring (151) is fixedly connected to the lower surface of the partition plate (15). Several spherical blocks (152) are circumferentially equidistantly arranged on the mounting ring (151). A second sealing groove (153) is opened on the outer circumferential surface of the lower end of the partition plate (15). A first sealing groove (311) is opened on the outer circumferential surface of the lower end of the second rotating shaft (31). A first sealing ring (363), a second sealing ring (364), and a guide groove (365) are respectively provided on the inner, outer, and lower surfaces of the baffle plate (36). The first sealing ring (363) 3) The second sealing ring (364) abuts against the first sealing groove (311) and the second sealing groove (153) respectively. The upper surface of the support column (32) and the end away from the second rotating shaft (31) are respectively fixedly connected to the guide column (321) and the slider (33). The guide column (321) is slidably connected in the guide groove (365). The lower surface of the baffle (36) and the second slide rod (35) are fixedly installed inside and on one side of the guide groove (365). The slider (33) is slidably sleeved on the second slide rod (35). The second spring (34) is sleeved on the second slide rod (35) and one end is fixedly connected to the slider (33). The upper edge of the baffle (36) is rotatably installed with a roller (361). An arc-shaped guide block (362) is provided on one side of the roller (361). The arc-shaped guide block (362) is fixedly installed on the baffle (36).

2. The lithium liquid calcium removal and separation device as described in claim 1, characterized in that: The bottom of the outer shell (1) is fixedly installed on the bracket (11). An air pipe is provided at the upper end of the outer shell (1). One end of the air pipe is connected to an external pressure pump, and the other end is connected to the inside of the filter column (16).

3. The lithium liquid calcium removal and separation device as described in claim 1, characterized in that: The inlet pipe (13) is connected to the inside of the filter column (16), and a filtrate chamber is formed between the outer shell (1) and the filter column (16). One end of the outlet pipe (14) is connected to the filtrate chamber.

4. The lithium liquid calcium removal and separation device as described in claim 1, characterized in that: The motor (21) is fixedly installed at the top center of the outer shell (1). Several mounting brackets (24) are arranged around the inner edge of the filter column (16). Several paddles (25) are arranged in rows on each mounting bracket (24).

5. The lithium liquid calcium removal and separation device as described in claim 1, characterized in that: The stirring blade (23) is rotatably mounted on the mounting rod (231). The mounting rod (231) is fixedly connected to a mounting base (232) at one end near the first rotating shaft (22). The first rotating shaft (22) is provided with a plurality of movable grooves (221) arranged spirally at equal intervals. The mounting base (232) is slidably mounted in the movable groove (221). The movable groove (221) is fixedly mounted with a first slide rod (222) and a first spring (223). The first spring (223) is sleeved on the first slide rod (222). The mounting base (232) is slidably connected to the first slide rod (222) and fixedly connected to the first spring (223) on one side.

6. A method for calcium removal and separation of lithium liquid, characterized in that: The lithium liquid calcium removal and separation device according to any one of claims 1 to 5 includes the following steps: S1: Initial mixing: Sodium carbonate and lithium liquid to be decalcified are introduced into the filter column (16), and the motor (21) is started to drive the stirring blade (23) to rotate at low speed, so that sodium carbonate and lithium liquid are mixed and precipitate is produced after a period of time. S2: Sedimentation and conveying, increase the speed of motor (21) to make baffle (36) open outward due to centrifugal force. The heavier sediment is pushed to the middle of baffle (15) due to centrifugal force and falls into sedimentation chamber (12) from the middle of baffle (15). S3: Filter again, turn off the motor (21), so that the baffle (36) is reset under the action of the second spring (34), the middle of the partition (15) is closed, and the external pressure pump is turned on to pressurize the inside of the filter column (16), so that the pre-treated solution passes through the filter column (16) and enters the filtrate chamber, and then flows out from the outlet pipe (14).

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