Salt lake lithium extraction electrodialysis apparatus

Abstract

Disclosed is a salt lake lithium extraction electrodialysis apparatus, which relates to the technical field of lithium salt production. Said apparatus comprises a containing assembly, an electrodialysis assembly, and a stirring assembly; the containing assembly comprises a barrel, a top cover, and a feed pipe; the top of the barrel is rotatably connected to the top cover, the barrel is in communication with one end of the feed pipe, and an inner slot is formed on an inner wall of the barrel; a communication pipe is arranged on the top cover; the electrodialysis assembly comprises a first anode cylinder, a first ion exchange membrane, a first cathode cylinder, a second ion exchange membrane, and a second anode cylinder; the top of the first anode cylinder is fixedly connected to the top cover, and a gap is present between the bottom of the first anode cylinder and the bottom wall of the barrel body. The present apparatus facilitates lithium chloride, sodium, and potassium cations in passing through the first ion exchange membrane and entering into a space between between the first ion exchange membrane and the first cathode cylinder, and after a round of purification, a concentrated solution is formed; also, the present apparatus can stir and mix a raw material liquid, which accelerates the movement of cations in the raw material liquid and is beneficial for improving extraction efficiency.

Description

A salt lake lithium extraction electrodialysis device Technical Field

[0001] The present disclosure relates to the technical field of lithium salt production, and in particular to an electrodialysis device for extracting lithium from a salt lake. Background Art

[0002] Electrodialysis devices directly utilize electrical energy to separate ions or charged small molecules. Electrodialysis technology has developed into a large-scale chemical unit process and holds a significant position in the membrane separation field. It is widely used in chemical desalination, seawater desalination, food and pharmaceuticals, and wastewater treatment, and in some regions has become the primary method for producing drinking water. It offers advantages such as low energy consumption, significant economic benefits, flexible device design and system application, easy operation and maintenance, environmental friendliness, long device life, and high raw water recovery rates.

[0003] In the related art, the core component of electrodialysis is the ion exchange membrane, which mainly utilizes the selective permeability working principle of the ion exchange membrane. At the same time, a DC electric field is applied on both sides of the membrane to cause the anions and cations in the solution to migrate in a directional manner. Since the ion exchange membrane has different selective permeabilities to anions and cations, the electrolyte solution can be concentrated and diluted. The electrodialysis device is composed of a membrane stack composed of several pairs of ion exchange membranes, an electrode plate and a locking device. The middle partition used in assembling the membrane stack has the following main functions: to support and isolate the ion exchange membrane, and the water distribution channel and the ion exchange membrane form different water distribution channels, which increases the disturbance of the fluid and enhances the mass transfer process. Nowadays, the purity of electrodialysis devices in industrial production and other fields is getting higher and higher. The electrodialysis device in the related art uses multiple purification devices for multi-stage purification, which occupies a large area and has low efficiency during extraction, resulting in low production capacity. Summary of the Invention

[0004] The technical problem to be solved by the present disclosure is that the electrodialysis device in the related art uses multiple purification devices for multi-stage purification, occupies a large area, has low efficiency during extraction, and results in low production capacity.

[0005] To solve the above technical problems, the present disclosure provides the following technical solutions: a salt lake lithium extraction electrodialysis device, which includes a containing assembly, an electrodialysis assembly and a stirring assembly, the containing assembly includes a cylinder, a top cover and a feeding tube, the top of the cylinder is rotatably connected to the top cover, the cylinder is connected to one end of the feeding tube, the inner wall of the cylinder is provided with an inner groove, and the top cover is provided with a connecting tube; the electrodialysis assembly includes a first positive electrode cylinder, a first ion exchange membrane, a first cathode cylinder, a second ion exchange membrane and a second positive electrode cylinder, the top of the first positive electrode cylinder is fixedly connected to the top cover, a gap is left between the bottom of the first positive electrode cylinder and the bottom wall of the cylinder, the first ion exchange membrane, the first cathode cylinder, the second ion exchange membrane and the second positive electrode cylinder are sequentially arranged inside the first positive electrode cylinder, and the first ion exchange membrane, the first cathode cylinder, the second ion exchange membrane and the second positive electrode cylinder are respectively fixedly connected to the top cover; the stirring assembly includes a first spiral plate, the inner side of the first spiral plate is fixedly connected to the outer wall of the first positive electrode cylinder, and the outer side of the first spiral plate is slidably connected to the inner wall of the cylinder.

[0006] In one embodiment: the stirring assembly also includes a second spiral plate and a third spiral plate, the inner side of the second spiral plate is fixedly connected to the first cathode tube, and a gap is left between the outer side of the second spiral plate and the first ion exchange membrane, the outer side of the third spiral plate is fixedly connected to the first cathode tube, and a gap is left between the inner side of the third spiral plate and the second ion exchange membrane.

[0007] In one embodiment, the spiral direction of the second spiral plate is opposite to that of the first spiral plate and the third spiral plate.

[0008] In one embodiment: the space between the first cathode tube and the second ion exchange membrane is connected to the inner tank, the top of the space between the first ion exchange membrane and the first cathode tube is connected to one end of the connecting tube, and the other end of the connecting tube is connected to the top of the space between the second ion exchange membrane and the second positive electrode tube.

[0009] In one embodiment, the outer wall of the second positive electrode cylinder is fixedly connected to a fixing plate, and the top of the fixing plate is fixedly connected to the bottom of the second ion exchange membrane.

[0010] In one embodiment, the inner wall of the second positive electrode cylinder is fixedly connected to one end of a fixing rod, and the other end of the fixing rod is fixedly connected to a fixing column.

[0011] In one embodiment, the bottom of the first ion exchange membrane is fixedly connected to a fixing ring, and an annular groove is provided on the bottom wall of the cylinder corresponding to the fixing ring, and the fixing ring is rotatably connected to the annular groove.

[0012] In one embodiment, the outer wall of the fixing column is fixedly connected to the fourth spiral plate, and the spiral direction of the fourth spiral plate is the same as that of the second spiral plate.

[0013] In one embodiment: the top of the second positive electrode cylinder is fixedly connected to the bottom of the first accommodating cylinder, the top of the first accommodating cylinder is rotatably connected to the second accommodating cylinder, the outer wall of the second accommodating cylinder is fixedly connected to a limiting ring, two limiting rings are provided, and the limiting rings are respectively located on both sides of the top wall of the second accommodating cylinder, the second accommodating cylinder is connected to one end of the discharge pipe, and the outer wall of the first accommodating cylinder is fixedly connected to the top cover.

[0014] In one embodiment: it also includes a driving assembly, which includes a motor, a driving shaft, a first gear and a second gear. The motor is connected to the driving shaft, the driving shaft is fixedly connected to the first gear, the first gear is meshed with the second gear, and the motor is installed on the outer wall of the cylinder through a motor base.

[0015] The beneficial effects of the present invention are as follows: when the top cover rotates, the first positive electrode cylinder is driven to rotate, and the first positive electrode cylinder drives the first spiral plate to rotate. When the first spiral plate rotates, a downward pressure is applied to the raw material liquid, so that the raw material liquid enters the space between the first positive electrode cylinder and the first ion exchange membrane, so that the cations of lithium chloride ions, sodium ions and potassium ions pass through the first ion exchange membrane and enter the space between the first ion exchange membrane and the first cathode cylinder. After one purification, a concentrated liquid is formed, and the raw material liquid can be stirred and mixed to accelerate the movement of cations in the raw material liquid, which is beneficial to improving the extraction efficiency, and the raw material liquid can be purified for a second time, which is beneficial to improving the purity of the purified liquid. Moreover, the device occupies a smaller area and has a higher utilization rate of the internal space of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of the overall structure of an embodiment of the present disclosure.

[0017] FIG2 is a cross-sectional view of the overall structure of an embodiment of the present disclosure.

[0018] FIG3 is an enlarged schematic diagram of point B in FIG2 in an embodiment of the present disclosure.

[0019] FIG4 is a cross-sectional view of the cylinder in an embodiment of the present disclosure.

[0020] FIG5 is an enlarged schematic diagram of point C in FIG2 in an embodiment of the present disclosure.

[0021] FIG6 is a cross-sectional view of the top cover and electrodialysis assembly in an embodiment of the present disclosure

[0022] FIG7 is an enlarged schematic diagram of point A in FIG1 in an embodiment of the present disclosure.

[0023] Figure markings: accommodating assembly 1, cylinder 11, inner groove 111, annular groove 112, top cover 12, connecting pipe 121, feeding pipe 13, electrodialysis assembly 2, first positive electrode cylinder 21, first ion exchange membrane 22, fixing ring 221, first cathode cylinder 23, second ion exchange membrane 24, second positive electrode cylinder 25, fixing plate 251, fixing rod 252, fourth spiral plate 253, fixing column 254, first accommodating cylinder 26, limiting ring 261, discharge pipe 262, second accommodating cylinder 27, stirring assembly 3, first spiral plate 31, second spiral plate 32, third spiral plate 33, driving assembly 4, motor 41, motor base 411, driving shaft 42, first gear 43, second gear 44. Implementation Method

[0024] In order to make the above-mentioned objects, features and advantages of the present disclosure more obvious and easy to understand, the specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. Example 1

[0025] 1 and 2 , this embodiment provides a salt lake lithium extraction electrodialysis device, comprising: a containing assembly 1, an electrodialysis assembly 2 and a stirring assembly 3, wherein the containing assembly 1 comprises a cylinder 11, a top cover 12 and a feeding pipe 13, the top of the cylinder 11 is rotatably connected to the top cover 12, the cylinder 11 is connected to one end of the feeding pipe 13, an inner groove 111 is provided on the inner wall of the cylinder 11, and a connecting pipe 121 is provided on the top cover 12.

[0026] In some embodiments, the interior of the barrel 11 is used to accommodate the raw material liquid. The barrel 11 is cylindrical. The top cover 12 can rotate on the barrel 11. The feeding tube 13 is used to add the raw material liquid into the barrel 11.

[0027] The electrodialysis assembly 2 includes a first positive electrode tube 21, a first ion exchange membrane 22, a first cathode tube 23, a second ion exchange membrane 24 and a second positive electrode tube 25. The top of the first positive electrode tube 21 is fixedly connected to the top cover 12, and a gap is left between the bottom of the first positive electrode tube 21 and the bottom wall of the tube body 11. The first ion exchange membrane 22, the first cathode tube 23, the second ion exchange membrane 24 and the second positive electrode tube 25 are sequentially arranged inside the first positive electrode tube 21, and the first ion exchange membrane 22, the first cathode tube 23, the second ion exchange membrane 24 and the second positive electrode tube 25 are respectively fixedly connected to the top cover 12.

[0028] In some embodiments, the first positive electrode cylinder 21, the first ion exchange membrane 22, the first cathode cylinder 23, the second ion exchange membrane 24 and the second positive electrode cylinder 25 may be optionally provided with cylindrical cylinders and are concentrically arranged. When the top cover 12 is raised and lowered, it can drive the first ion exchange membrane 22, the first cathode cylinder 23, the second ion exchange membrane 24 and the second positive electrode cylinder 25 to move. After the raw material liquid is added to the cylinder body 11 from the feeding pipe 13, the first positive electrode cylinder 21 repels the cations of lithium chloride ions, sodium ions and potassium ions in the raw material liquid, while the first cathode cylinder 23 attracts the cations of lithium chloride ions, sodium ions and potassium ions. The cations of lithium chloride ions, sodium ions and potassium ions pass through the first ion exchange membrane 22 and enter the space between the first ion exchange membrane 22 and the first cathode cylinder 23. After one purification, a concentrated solution is formed. The concentrated solution then enters the space between the second ion exchange membrane 24 and the second positive electrode cylinder 25 through the connecting pipe 121. The second positive electrode cylinder 23 The cylinder 25 repels the cations of the lithium chloride ions, sodium ions, and potassium ions in the concentrated solution, while the first cathode cylinder 23 attracts the cations of the lithium chloride ions, sodium ions, and potassium ions. The cations of the lithium chloride ions, sodium ions, and potassium ions pass through the second ion exchange membrane 24 and, after secondary purification, form a purified liquid. The purified liquid enters the space between the first cathode cylinder 23 and the second ion exchange membrane 24, then enters the bottom of the second positive electrode cylinder 25 through the inner tank 111. The purified liquid is then discharged from the top of the second positive electrode cylinder 25, completing the purification of the cations of the lithium chloride ions, sodium ions, and potassium ions. The ability to perform secondary purification of the raw liquid is beneficial to improving the purity of the purified liquid, and the device occupies a smaller area and has a higher utilization rate of the internal space of the device.

[0029] The stirring assembly 3 includes a first spiral plate 31 , the inner side of the first spiral plate 31 is fixedly connected to the outer wall of the first positive electrode barrel 21 , and the outer side of the first spiral plate 31 is slidably connected to the inner wall of the barrel 11 .

[0030] In some embodiments, when the top cover 12 rotates, it can drive the first positive electrode cylinder 21 to rotate, and the first positive electrode cylinder 21 can drive the first spiral plate 31 to rotate. When the first spiral plate 31 rotates, it applies a downward pressure to the raw material liquid, so that the raw material liquid enters the space between the first positive electrode cylinder 21 and the first ion exchange membrane 22, so that the cations of lithium chloride ions, sodium ions and potassium ions pass through the first ion exchange membrane 22 and enter the space between the first ion exchange membrane 22 and the first cathode cylinder 23. After one purification, a concentrated liquid is formed, and the raw material liquid can be stirred and mixed to accelerate the movement of cations in the raw material liquid, which is beneficial to improving the extraction efficiency. Example 2

[0031] 1 to 7 , this embodiment is based on the previous embodiment, and differs from the previous embodiment in that.

[0032] The stirring assembly 3 also includes a second spiral plate 32 and a third spiral plate 33. The inner side of the second spiral plate 32 is fixedly connected to the first cathode tube 23, and a gap is left between the outer side of the second spiral plate 32 and the first ion exchange membrane 22. The outer side of the third spiral plate 33 is fixedly connected to the first cathode tube 23, and a gap is left between the inner side of the third spiral plate 33 and the second ion exchange membrane 24.

[0033] In some embodiments, when the top cover 12 rotates, the first cathode cylinder 23 can rotate, and the first cathode cylinder 23 can drive the second spiral plate 32 and the third spiral plate 33 to rotate. When the second spiral plate 32 or the third spiral plate 33 rotates, it can assist the movement of cations in the concentrated liquid or purified liquid, which is beneficial to improving the extraction efficiency.

[0034] The spiral direction of the second spiral plate 32 is opposite to that of the first spiral plate 31 and the third spiral plate 33. Therefore, when the first spiral plate 31, the second spiral plate 32 and the third spiral plate 33 rotate in the same direction, the thrust generated by the second spiral plate 32 is opposite to that of the first spiral plate 31 and the third spiral plate 33.

[0035] The space between the first cathode tube 23 and the second ion exchange membrane 24 is connected to the inner tank 111, the top of the space between the first ion exchange membrane 22 and the first cathode tube 23 is connected to one end of the connecting tube 121, and the other end of the connecting tube 121 is connected to the top of the space between the second ion exchange membrane 24 and the second positive electrode tube 25.

[0036] In some embodiments, when the second spiral plate 32 rotates, it can give an upward force to the concentrated liquid in the space between the first ion exchange membrane 22 and the first cathode tube 23, and the concentrated liquid enters the space between the second ion exchange membrane 24 and the second positive electrode tube 25 through the connecting pipe 121. The second positive electrode tube 25 repels the cations of lithium chloride ions, sodium ions and potassium ions in the concentrated liquid, while the first cathode tube 23 attracts the cations of lithium chloride ions, sodium ions and potassium ions. The cations of lithium chloride ions, sodium ions and potassium ions pass through the second ion exchange membrane 24 and, after secondary purification, form a purified liquid.

[0037] Furthermore, the purified liquid enters the space between the first cathode cylinder 23 and the second ion exchange membrane 24. When the third spiral plate 33 rotates, it can give the purified liquid in the space between the first cathode cylinder 23 and the second ion exchange membrane 24 a downward force, guiding the purified liquid into the inner tank 111, preventing the purified liquid enriched in cations of lithium chloride ions, sodium ions and potassium ions from accumulating in the space between the first cathode cylinder 23 and the second ion exchange membrane 24, affecting the extraction efficiency. The purified liquid then enters the bottom of the second positive electrode cylinder 25 through the inner tank 111, and then the purified liquid is discharged from the top of the second positive electrode cylinder 25, completing the purification of cations of lithium chloride ions, sodium ions and potassium ions. The raw material liquid can be purified twice, which is beneficial to improving the purity of the purified liquid, and the device has a smaller footprint and a higher utilization rate of the internal space of the device.

[0038] The outer wall of the second positive electrode barrel 25 is fixedly connected to the fixing plate 251 , and the top of the fixing plate 251 is fixedly connected to the bottom of the second ion exchange membrane 24 .

[0039] In some embodiments, the fixing plate 251 can seal the bottom of the second ion exchange membrane 24 and the second positive electrode tube 25 to prevent the concentrate in the space between the second ion exchange membrane 24 and the second positive electrode tube 25 from directly entering the inner tank 111 from the bottom of the second ion exchange membrane 24 and the second positive electrode tube 25.

[0040] The inner wall of the second positive electrode barrel 25 is fixedly connected to one end of a fixing rod 252 , and the other end of the fixing rod 252 is fixedly connected to a fixing post 254 .

[0041] In some embodiments, multiple fixing rods 252 are provided between the fixing column 254 and the inner wall of the second positive electrode barrel 25. The fixing rods 252 can support and fix the fixing column 254. When the second positive electrode barrel 25 rotates, the fixing column 254 can be driven to rotate by the fixing rods 252.

[0042] The bottom of the first ion exchange membrane 22 is fixedly connected to a fixing ring 221 . An annular groove 112 is provided on the bottom wall of the cylinder 11 corresponding to the fixing ring 221 . The fixing ring 221 is rotatably connected to the annular groove 112 .

[0043] In some embodiments, the retaining ring 221 at the bottom of the first ion exchange membrane 22 is inserted into the annular groove 112 to prevent the raw liquid from passing through the bottom of the first ion exchange membrane 22 and affecting the purity of the concentrate. When the first ion exchange membrane 22 rotates, the retaining ring 221 can be driven to rotate in the annular groove 112.

[0044] The outer wall of the fixing column 254 is fixedly connected to the fourth spiral plate 253 , and the spiral direction of the fourth spiral plate 253 is the same as that of the second spiral plate 32 .

[0045] In some embodiments, when the second positive electrode cylinder 25 rotates, the fixed column 254 can be driven to rotate through the fixed rod 252, and the fixed column 254 drives the fourth spiral plate 253 to rotate. The fourth spiral plate 253 gives the purified liquid an upward force to facilitate the discharge of the purified liquid.

[0046] The top of the second positive electrode cylinder 25 is fixedly connected to the bottom of the first accommodating cylinder 26, the top of the first accommodating cylinder 26 is rotatably connected to the second accommodating cylinder 27, the outer wall of the second accommodating cylinder 27 is fixedly connected to the limiting ring 261, and there are two limiting rings 261, which are respectively located on both sides of the top wall of the second accommodating cylinder 26, the second accommodating cylinder 26 is connected to one end of the discharge pipe 262, and the outer wall of the first accommodating cylinder 26 is fixedly connected to the top cover 12.

[0047] In some embodiments, the first accommodating tube 26 is capable of relative rotation with respect to the outer wall of the second accommodating tube 26 , and a retaining ring 261 is configured to secure the second accommodating tube 26 to prevent axial slippage. When the second positive electrode tube 25 rotates, the fixing rod 252 drives the fixing post 254 to rotate, which in turn drives the fourth spiral plate 253 to rotate. The fourth spiral plate 253 applies an upward force to the purified liquid, causing it to enter the first and second accommodating tubes 26 and then be discharged through the discharge pipe 262 .

[0048] It also includes a drive assembly 4, which includes a motor 41, a drive shaft 42, a first gear 43 and a second gear 44. The motor 41 is connected to the drive shaft 42, the drive shaft 42 is fixedly connected to the first gear 43, the first gear 43 is meshed with the second gear 44, and the motor 41 is installed on the outer wall of the cylinder 11 through the motor base 411.

[0049] In some embodiments, when the motor 41 is working, it can drive the drive shaft 42 to rotate, the drive shaft 42 drives the first gear 43 to rotate, the first gear 43 drives the second gear 44, the second gear 44 drives the cylinder 11 to rotate, the first positive electrode cylinder 21 drives the first spiral plate 31 to rotate, the first cathode cylinder 23 drives the second spiral plate 32 and the third spiral plate 33 to rotate, and when the second positive electrode cylinder 25 rotates, it can drive the fixed column 254 to rotate through the fixed rod 252, and the fixed column 254 drives the fourth spiral plate 253 to rotate, thereby accelerating the flow of raw liquid, concentrated liquid and purified liquid inside the cylinder 11, which is beneficial to improving the extraction efficiency.

Claims

1. A salt lake lithium extraction electrodialysis device, characterized in that: include A containing assembly (1), the containing assembly (1) comprising a barrel (11), a top cover (12) and a feeding pipe (13), the top of the barrel (11) being rotatably connected to the top cover (12), the barrel (11) being connected to one end of the feeding pipe (13), an inner groove (111) being provided on the inner wall of the barrel (11), and a connecting pipe (121) being provided on the top cover (12); An electrodialysis assembly (2), the electrodialysis assembly (2) comprising a first positive electrode cylinder (21), a first ion exchange membrane (22), a first cathode cylinder (23), a second ion exchange membrane (24) and a second positive electrode cylinder (25), the top of the first positive electrode cylinder (21) being fixedly connected to a top cover (12), a gap being left between the bottom of the first positive electrode cylinder (21) and a bottom wall of the cylinder body (11), the first ion exchange membrane (22), the first cathode cylinder (23), the second ion exchange membrane (24) and the second positive electrode cylinder (25) being sequentially sleeved inside the first positive electrode cylinder (21), and the first ion exchange membrane (22), the first cathode cylinder (23), the second ion exchange membrane (24) and the second positive electrode cylinder (25) being fixedly connected to the top cover (12) respectively; A stirring assembly (3), the stirring assembly (3) comprising a first spiral plate (31), the inner side of the first spiral plate (31) being fixedly connected to the outer wall of the first positive electrode cylinder (21), and the outer side of the first spiral plate (31) being slidably connected to the inner wall of the cylinder (11).

2. The salt lake lithium extraction electrodialysis device according to claim 1, characterized in that: The stirring assembly (3) further comprises a second spiral plate (32) and a third spiral plate (33); the inner side of the second spiral plate (32) is fixedly connected to the first cathode cylinder (23), and a gap is left between the outer side of the second spiral plate (32) and the first ion exchange membrane (22); the outer side of the third spiral plate (33) is fixedly connected to the first cathode cylinder (23), and a gap is left between the inner side of the third spiral plate (33) and the second ion exchange membrane (24).

3. The salt lake lithium extraction electrodialysis device as claimed in claim 2, characterized in that: The spiral direction of the second spiral plate (32) is opposite to that of the first spiral plate (31) and the third spiral plate (33).

4. The salt lake lithium extraction electrodialysis device as claimed in claim 3, characterized in that: The space between the first cathode tube (23) and the second ion exchange membrane (24) is connected to the inner tank (111), the top of the space between the first ion exchange membrane (22) and the first cathode tube (23) is connected to one end of a connecting tube (121), and the other end of the connecting tube (121) is connected to the top of the space between the second ion exchange membrane (24) and the second positive electrode tube (25).

5. The salt lake lithium extraction electrodialysis device as claimed in claim 4, characterized in that: The outer wall of the second positive electrode cylinder (25) is fixedly connected to a fixing plate (251), and the top of the fixing plate (251) is fixedly connected to the bottom of the second ion exchange membrane (24).

6. The salt lake lithium extraction electrodialysis device as claimed in claim 5, characterized in that: The inner wall of the second positive electrode cylinder (25) is fixedly connected to one end of a fixing rod (252), and the other end of the fixing rod (252) is fixedly connected to a fixing column (254).

7. The salt lake lithium extraction electrodialysis device as claimed in claim 6, characterized in that: The bottom of the first ion exchange membrane (22) is fixedly connected to a fixing ring (221); the bottom wall of the cylinder (11) is provided with an annular groove (112) corresponding to the fixing ring (221); and the fixing ring (221) is rotatably connected to the annular groove (112).

8. The salt lake lithium extraction electrodialysis device as claimed in claim 5, characterized in that: The outer wall of the fixing column (254) is fixedly connected to the fourth spiral plate (253), and the spiral direction of the fourth spiral plate (253) is the same as that of the second spiral plate (32).

9. The salt lake lithium extraction electrodialysis device as claimed in claim 5, characterized in that: The top of the second positive electrode cylinder (25) is fixedly connected to the bottom of the first accommodating cylinder (26), the top of the first accommodating cylinder (26) is rotatably connected to the second accommodating cylinder (27), the outer wall of the second accommodating cylinder (27) is fixedly connected to a limiting ring (261), two limiting rings (261) are provided, and the limiting rings (261) are respectively located on both sides of the top wall of the second accommodating cylinder (26), the second accommodating cylinder (26) is connected to one end of the discharge pipe (262), and the outer wall of the first accommodating cylinder (26) is fixedly connected to the top cover (12).

10. The salt lake lithium extraction electrodialysis device as claimed in claim 2, characterized in that: The invention also comprises a driving assembly (4), wherein the driving assembly (4) comprises a motor (41), a driving shaft (42), a first gear (43) and a second gear (44), wherein the motor (41) is connected to the driving shaft (42), the driving shaft (42) is fixedly connected to the first gear (43), the first gear (43) is meshingly connected to the second gear (44), and the motor (41) is mounted on the outer wall of the cylinder (11) via a motor seat (411).

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