Silicon removal device for extracting lithium from salt lake

Abstract

The utility model relates to the technical field of lithium extraction of salt lakes, in particular to a silicon removal device for lithium extraction of salt lakes, which comprises a silicon removal sedimentation tank for lithium extraction of salt lakes, the silicon removal sedimentation tank for lithium extraction of salt lakes is of a circular structure with smooth inner wall, and one side of the silicon removal sedimentation tank for lithium extraction of salt lakes is provided with an inner wall attached sediment downward-moving cleaning device. The inner wall attached sediment downward-moving cleaning device comprises a cleaning assembly and a lifting driving assembly, the cleaning assembly is located at the top of the salt lake lithium extraction and silicon removal sedimentation tank and comprises a cleaning ring, the cleaning ring is of an annular structure, and the top of the cleaning ring is connected with the lifting driving assembly through a connecting piece. The inner wall attached sediment downward-moving cleaning device moves downwards along with the brine liquid level in the liquid outlet process, lithium carbonate sediment attached to the pool wall in the salt lake lithium extraction and silicon removal process is cleaned, the amount of the lithium carbonate sediment in the brine treated at a time is guaranteed, chemical corrosion caused by sediment adhesion to the pool wall is reduced, shutdown cleaning is reduced, and the service life of the pool is prolonged. And the quality of lithium carbonate products is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium extraction from salt lakes, in particular to a silicon removal device used for lithium extraction from salt lakes. Background Art

[0002] Lithium is a crucial energy metal. Lithium and its compounds are widely used in glass, ceramics, batteries, and the nuclear industry. Low carbon emissions have become a global consensus and trend, particularly with the recent development of lithium batteries, which has led to a rapid expansion in global lithium consumption. Salt lake lithium extraction is a process for extracting lithium from salt lake brine. Salt lake lithium extraction plays a vital role globally. As a country with significant lithium reserves, the development of salt lake lithium extraction technology in China is crucial for improving national energy security and promoting the development of the new energy vehicle industry.

[0003] The main desiliconization methods for lithium extraction from salt lakes include adsorption, membrane separation, precipitation, solvent extraction, and electrochemical methods. During the precipitation reaction, soda ash (sodium carbonate) is added to the brine after impurities have been removed as a precipitant to precipitate the lithium in the form of lithium carbonate. During the precipitation process, the precipitate adheres to the pool walls. As the filtration liquid level drops, the precipitate adheres to the inner wall, not only reducing the amount of brine processed per single pass, but also reducing production continuity due to the need for regular shutdowns for cleaning. The adhesion of the precipitate can cause chemical corrosion to the pool walls, especially since lithium carbonate precipitates have a certain alkalinity. Long-term accumulation of precipitate is not only difficult to remove, but may also accelerate equipment wear and corrosion, thereby increasing maintenance costs and reducing equipment life. If the precipitate adheres to the pool walls, in some cases, falls off and enters the final product, it will affect the purity and quality of the lithium carbonate product. Utility Model Content

[0004] The purpose of the utility model is to provide a desiliconization device for extracting lithium from salt lakes to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A desiliconization device for lithium extraction from a salt lake comprises a desiliconization sedimentation tank for lithium extraction from a salt lake, the desiliconization sedimentation tank having a smooth inner wall and a circular structure, a device for cleaning sediments attached to the inner wall being provided on one side of the desiliconization sedimentation tank, the device for cleaning sediments attached to the inner wall comprising a cleaning assembly and a lifting drive assembly, the cleaning assembly being located at the top of the desiliconization sedimentation tank, the cleaning assembly comprising a cleaning ring having a circular ring structure, the top of the cleaning ring being connected to the lifting drive assembly via a connector.

[0007] As a preferred solution of the present invention, the lifting drive assembly includes a lifting screw and a fixed seat, the bottom of the lifting screw is connected to the fixed seat through a bearing, the fixed seat is located on one side of the outer wall of the salt lake lithium extraction and silicon removal sedimentation tank, the outside of the lifting screw is sleeved with a sleeve, the top inner wall of the sleeve is connected to the top of the lifting screw through a bearing, a slide groove is vertically opened on the outer wall of one side of the sleeve, and a sliding block is slidably connected to the lifting screw located inside the sleeve, and the outer wall of one side of the sliding block passes through the slide groove and extends to its outside to be connected with a connecting block, and a lifting sleeve shaft is connected to the connecting block located outside the sleeve, and the outer wall of the lifting sleeve shaft is connected to the cleaning ring through a connecting piece.

[0008] As a preferred solution of the present invention, the connecting part includes a fixed cross bar connected to the inner circumferential wall at the top of the cleaning ring, a connecting column is connected directly above the top of the fixed cross bar in the middle of the cleaning ring, and the outer wall on one side of the top of the connecting column is connected to the outer wall of the lifting sleeve shaft through the connecting cross bar.

[0009] As a preferred solution of the present invention, a first bevel gear is sleeved on the outer circumferential wall of the lifting screw at the bottom of the sleeve, a second bevel gear is meshedly connected to one side of the first bevel gear, and the outer wall of the second bevel gear is connected to the external drive motor through a connecting shaft and a coupling.

[0010] As a preferred solution of the present invention, the outer circumferential wall below the cleaning ring abuts against the inner circumferential wall of the salt lake lithium extraction and silicon removal sedimentation tank.

[0011] As a preferred solution of the present invention, a filtering outlet is connected through the bottom of the salt lake lithium extraction and silicon removal sedimentation tank.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] In response to the problems raised in the background technology, the present application sets up a downward-moving cleaning device for sediment attached to the inner wall, which follows the brine level downward during the liquid discharge process, and cleans the lithium carbonate sediment attached to the pool wall during the lithium extraction and silicon removal process in the salt lake, thereby ensuring the amount of lithium carbonate sediment in the brine treated in a single time, reducing the chemical corrosion of the pool wall caused by the adhesion of the sediment, reducing the need for regular shutdown for cleaning and causing production downtime, and ensuring the purity and quality of the lithium carbonate product;

[0014] During cleaning, the external drive motor drives the second bevel gear to rotate, and the second bevel gear is meshed with the first bevel gear to drive the first bevel gear to rotate. The first bevel gear is fixed to the lifting screw. When the lifting screw rotates, the sliding block on it slides inside the sleeve. The outer wall of one side of the sliding block passes through the slide groove and extends to the connecting block connected to it to move up and down. Since the top of the connecting block is connected to the lifting sleeve shaft, the cleaning ring connected by the connecting piece is driven up and down by the lifting sleeve shaft to clean the carbon dioxide sediment attached to the inner wall of the salt lake lithium extraction and silicon removal sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the connection between the integral salt lake lithium extraction and silicon removal sedimentation tank and the cleaning ring of the utility model;

[0016] Figure 2 This is a side structural diagram of the device for removing sediment attached to the inner wall according to the present invention;

[0017] Figure 3 This is a schematic diagram of the connection between the second bevel gear and the first bevel gear on the outside of the lifting screw of the utility model;

[0018] Figure 4 This is a schematic diagram of the side sliding groove of the sleeve of the present invention.

[0019] In the figure: 1. Salt lake lithium extraction and silicon removal sedimentation tank; 2. Device for removing sediment attached to the inner wall; 201. Fixed crossbar; 202. Connecting column; 203. Connecting crossbar; 21. Cleaning ring; 22. Connecting block; 23. Lifting sleeve; 24. Lifting screw; 25. Fixed seat; 26. Bearing; 27. Sleeve; 28. Slide; 29. ​​Sliding block; 32. First bevel gear; 33. Second bevel gear. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Example

[0021] Each device in this application document adopts a conventional model in the prior art, and is controlled by a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field, which is common knowledge in this field, so this application document will not explain it in detail.

[0022] See also Figure 1-4The utility model provides a technical solution: a desiliconization device for lithium extraction from salt lakes, comprising a desiliconization sedimentation tank 1 for lithium extraction from salt lakes, the desiliconization sedimentation tank 1 having a smooth inner wall and a circular structure, a device 2 for cleaning the sediment attached to the inner wall being provided on one side of the desiliconization sedimentation tank 1, the device 2 for cleaning the sediment attached to the inner wall comprising a cleaning assembly and a lifting drive assembly, the cleaning assembly being located at the top of the desiliconization sedimentation tank 1 for lithium extraction from salt lakes, the cleaning assembly comprising a cleaning ring 21, the cleaning ring 21 being arranged in a circular ring structure, the top of the cleaning ring 21 being connected to the lifting drive assembly through a connector, the outer circumferential wall below the cleaning ring 21 abutting against the inner circumferential wall of the desiliconization sedimentation tank 1 for lithium extraction from salt lakes; a filtering outlet is connected through the bottom of the desiliconization sedimentation tank 1 for lithium extraction from salt lakes.

[0023] It should be noted that, in this embodiment, the present application sets a downward-moving cleaning device 2 for the sediment attached to the inner wall, which follows the brine level during the liquid discharge process, and cleans the lithium carbonate sediment attached to the pool wall during the lithium extraction and silicon removal process of the salt lake, thereby ensuring the amount of lithium carbonate sediment in the brine treated in a single time, reducing the chemical corrosion of the pool wall caused by the adhesion of the sediment, reducing the need for regular shutdown for cleaning and causing production downtime, and ensuring the purity and quality of the lithium carbonate product;

[0024] Furthermore, in the process of lithium extraction precipitation reaction from the salt lake, sodium carbonate is added as a precipitant to the brine in the salt lake lithium extraction and silicon removal precipitation tank 1 after the impurities are removed, so that the lithium is precipitated in the form of lithium carbonate. This process not only precipitates the lithium in the form of lithium carbonate, but also helps to remove impurities such as silicon, laying the foundation for subsequent purification steps;

[0025] Furthermore, the outer circumferential wall below the cleaning ring 21 abuts against the inner circumferential wall of the salt lake lithium extraction and silicon removal sedimentation tank 1, and the cleaning ring 21 is driven to move by the lifting and displacement of the lifting drive component. While the outer circumferential wall below the cleaning ring 21 abuts against the inner circumferential wall of the salt lake lithium extraction and silicon removal sedimentation tank 1 and moves, the lithium carbonate precipitate attached to the inner circumferential wall of the salt lake lithium extraction and silicon removal sedimentation tank 1 is cleaned, thereby ensuring the amount of lithium carbonate precipitate in the brine treated in a single time, reducing the chemical corrosion of the pool wall caused by the adhesion of the precipitate, reducing the need for regular shutdown for cleaning and causing production shutdown, and ensuring the purity and quality of the lithium carbonate product.

[0026] During cleaning, the external drive motor drives the second bevel gear 33 to rotate, and the second bevel gear 33 is meshed with the first bevel gear 32 to drive the first bevel gear 32 to rotate. The first bevel gear 32 is fixed to the lifting screw 24. When the lifting screw 24 rotates, the sliding block 29 on it slides inside the sleeve. The outer wall of one side of the sliding block 29 passes through the slide groove 28 and extends to the connecting block 22 connected to it to be lifted up and down. Since the top of the connecting block 22 is connected to the lifting sleeve shaft 23, the cleaning ring 21 connected by the connecting piece is driven up and down by the lifting sleeve shaft 23 to clean the carbon dioxide precipitates attached to the inner wall of the salt lake lithium extraction and silicon removal sedimentation tank 1.

[0027] See also Figure 1 、 2 And 4, the lifting drive assembly includes a lifting screw 24 and a fixed seat 25. The bottom of the lifting screw 24 is connected to the fixed seat 25 through a bearing 26. The fixed seat 25 is located on one side of the outer wall of the salt lake lithium desiliconization sedimentation tank 1. The outer sleeve 27 is provided on the lifting screw 24. The inner wall of the top of the sleeve 27 is connected to the top of the lifting screw 24 through the bearing 26. A slide groove 28 is vertically opened on the outer wall of one side of the sleeve 27. A sliding block 29 is slidably connected to the lifting screw 24 inside the sleeve 27. The outer wall of one side of the sliding block 29 passes through the slide groove 28 and extends to its outside to be connected to the connecting block 22. The lifting sleeve is connected to the connecting block 22 outside the sleeve 27. The shaft 23 and the outer wall of the lifting sleeve shaft 23 are connected to the cleaning ring 21 through a connecting piece; the connecting piece includes a fixed cross bar 201 connected to the inner circumferential wall at the top of the cleaning ring 21, and a connecting column 202 is connected just above the top of the fixed cross bar 201 in the middle of the cleaning ring 21. The outer wall of one side of the top of the connecting column 202 is connected to the outer wall of the lifting sleeve shaft 23 through a connecting cross bar 203; a first bevel gear 32 is sleeved on the outer circumferential wall of the lifting screw rod 24 at the bottom of the sleeve 27, and a second bevel gear 33 is meshed with one side of the first bevel gear 32. The outer wall of the second bevel gear 33 is connected to the external drive motor through a connecting shaft and a coupling.

[0028] The outer wall of the sleeve 27 is provided with a vertical slot 28, and a sliding block 29 is slidably connected to the lifting screw 24 inside the sleeve 27. The outer wall of the sliding block 29 extends through the slot 28 to the outside thereof and is connected to the connecting block 22. The lifting sleeve shaft 23 is connected to the connecting block 22 outside the sleeve 27. The connecting block 22 slides up and down inside the slot 28. When the sliding block 29 follows the lifting screw 24 to rotate up and down, the connecting block 22 follows the sliding block 29 to slide up and down inside the slot 28. Since the bottom of the lifting sleeve shaft 23 is connected to the top of the connecting block 22, the displacement of the connecting block 22 further drives the lifting sleeve shaft 23 to move. The outer wall of one side of the lifting sleeve shaft 23 is connected to the fixed cross bar 201 connected to the inner wall of the middle of the cleaning ring 21 through the connecting column 202. The cleaning ring 21 is driven by the lifting sleeve shaft 23 to move to clean the carbon dioxide precipitate attached to the inner wall of the salt lake lithium extraction and silicon removal sedimentation tank 1;

[0029] Furthermore, an external drive motor drives the second bevel gear 33 to rotate, and the second bevel gear 33 is meshed and connected with the first bevel gear 32 to drive the first bevel gear 32 to rotate. The first bevel gear 32 is fixed to the lifting screw 24, and the bottom of the lifting screw 24 is connected to the fixing seat 25 through the bearing 26. Through PLC programming, it is linked with the filtered liquid level to automatically adjust the position of the cleaning device;

[0030] Furthermore, the lithium carbonate precipitates attached to the pool wall during the lithium extraction and silicon removal process in the salt lake are cleaned to ensure the amount of lithium carbonate precipitates in the brine treated in a single treatment, reduce the chemical corrosion of the pool wall caused by the precipitates, reduce the need for regular shutdowns for cleaning and production downtime, and ensure the purity and quality of the lithium carbonate products;

[0031] During cleaning, the external drive motor drives the second bevel gear 33 to rotate, and the second bevel gear 33 is meshed with the first bevel gear 32 to drive the first bevel gear 32 to rotate. The first bevel gear 32 is fixed to the lifting screw 24. When the lifting screw 24 rotates, the sliding block 29 on it slides inside the sleeve. The outer wall of one side of the sliding block 29 passes through the slide groove 28 and extends to the connecting block 22 connected to it to be lifted up and down. Since the top of the connecting block 22 is connected to the lifting sleeve shaft 23, the cleaning ring 21 connected by the connecting piece is driven up and down by the lifting sleeve shaft 23 to clean the carbon dioxide precipitates attached to the inner wall of the salt lake lithium extraction and silicon removal sedimentation tank 1.

[0032] As the preferred solution of the present utility model,

[0033] The working process of this utility model:

[0034] During use, the PLC programming is used to realize the linkage with the filtered liquid level and control the drive of the external drive motor. The external drive motor drives the second bevel gear 33 to rotate, and the second bevel gear 33 is meshed with the first bevel gear 32 to drive the first bevel gear 32 to rotate. The first bevel gear 32 is fixed to the lifting screw 24. When the lifting screw 24 rotates, the sliding block 29 thereon slides inside the sleeve. The outer wall of one side of the sliding block 29 passes through the slide groove 28 and extends to the connecting block 22 connected to the outside thereof for lifting and lowering. Since the top of the connecting block 22 is connected to the lifting sleeve shaft 23, the cleaning ring 21 connected by the connector is driven by the lifting sleeve shaft 23 to move up and down to clean the carbon dioxide precipitates attached to the inner wall of the salt lake lithium extraction and silicon removal sedimentation tank 1.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A desiliconization device for lithium extraction from salt lakes, comprising a desiliconization sedimentation tank (1) for lithium extraction from salt lakes, characterized in that: The salt lake lithium extraction and silicon removal sedimentation tank (1) is provided with a circular structure having a smooth inner wall. A device (2) for cleaning sediments attached to the inner wall is provided on one side of the salt lake lithium extraction and silicon removal sedimentation tank (1). The device (2) for cleaning sediments attached to the inner wall comprises a cleaning component and a lifting drive component. The cleaning component is located at the top of the salt lake lithium extraction and silicon removal sedimentation tank (1). The cleaning component comprises a cleaning ring (21). The cleaning ring (21) is provided with a circular ring structure. The top of the cleaning ring (21) is connected to the lifting drive component via a connecting piece.

2. A desiliconization device for extracting lithium from salt lakes according to claim 1, characterized in that: The lifting drive assembly includes a lifting screw (24) and a fixed seat (25), the bottom of the lifting screw (24) is connected to the fixed seat (25) through a bearing (26), and the fixed seat (25) is located on one side of the outer wall of the salt lake lithium extraction and silicon removal sedimentation tank (1). The lifting screw (24) is sleeved with a sleeve (27) on the outside, and the inner wall of the top of the sleeve (27) is connected to the top of the lifting screw (24) through the bearing (26). A sliding groove (28) is vertically opened on the outer wall of one side of the sleeve (27). A sliding block (29) is slidably connected to the lifting screw (24) inside the sleeve (27). The outer wall of one side of the sliding block (29) passes through the sliding groove (28) and extends to the outside thereof to be connected with a connecting block (22). A lifting sleeve shaft (23) is connected to the connecting block (22) outside the sleeve (27), and the outer wall of the lifting sleeve shaft (23) is connected to the cleaning ring (21) through a connecting piece.

3. A desiliconization device for extracting lithium from salt lakes according to claim 2, characterized in that: The connecting member includes a fixed cross bar (201) connected to the inner circumferential wall at the top of the cleaning ring (21), a connecting column (202) connected just above the top of the fixed cross bar (201) in the middle of the cleaning ring (21), and an outer wall on one side of the top of the connecting column (202) is connected to the outer wall of the lifting sleeve shaft (23) through a connecting cross bar (203).

4. The desiliconization device for extracting lithium from salt lakes according to claim 2, characterized in that: A first bevel gear (32) is sleeved on the outer circumferential wall of the lifting screw (24) located at the bottom of the sleeve (27), and a second bevel gear (33) is meshedly connected to one side of the first bevel gear (32), and the outer wall of the second bevel gear (33) is connected to an external drive motor through a connecting shaft and a coupling.

5. The desiliconization device for extracting lithium from salt lakes according to claim 1, characterized in that: The outer circumferential wall below the cleaning ring (21) abuts against the inner circumferential wall of the salt lake lithium extraction and silicon removal sedimentation tank (1).

6. The desiliconization device for extracting lithium from salt lakes according to claim 1, characterized in that: A filtering outlet is connected through the bottom of the salt lake lithium extraction and silicon removal sedimentation tank (1).

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