A lithium extraction electrodialysis device

Abstract

The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates to the technical field of lithium salt production. The application discloses a salt lake lithium extraction electrodialysis device and relates

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of lithium salt production, and particularly relates to a lithium extraction electrodialysis device. BACKGROUND

[0002] The electrodialysis device is a device for separating ions or small charged molecules directly using electric energy. The electrodialysis technology has developed into a large-scale chemical unit process and occupies an important position in the field of membrane separation. It is widely used in chemical desalination, seawater desalination, food and medicine, and wastewater treatment fields, and has become the main method for producing drinking water in some areas. It has the advantages of low energy consumption, significant economic benefits, flexible device design and system application, convenient operation and maintenance, no pollution to the environment, long service life of the device, high recovery rate of raw water, etc.

[0003] In the related art, the core component of the electrodialysis is an ion exchange membrane, which mainly uses the selective permeability principle of the ion exchange membrane. At the same time, a direct current electric field is applied to the two sides of the membrane to cause directional migration of the anions and cations in the solution. Due to the different selective permeability of the ion exchange membrane to the anions and cations, the effect of concentrating and diluting the electrolyte solution is achieved. The electrodialysis device is composed of a membrane stack composed of a plurality of pairs of ion exchange membranes, electrode plates, and locking devices. The intermediate spacer plate used when assembling the membrane stack has the following main functions: supporting and isolating the ion exchange membrane, arranging the water channel and the ion exchange membrane to form different water flow channels, increasing the disturbance of the fluid, and strengthening the mass transfer process. Today, the purity of the electrodialysis device in the field of industrial production 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

[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, which occupies a large area and has low efficiency during extraction, resulting 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, comprising a containing assembly, an electrodialysis assembly and a stirring assembly, the containing assembly comprises a cylinder, a top cover and a feeding pipe, the top of the cylinder is rotationally connected with the top cover, the cylinder is connected with one end of the feeding pipe, an inner groove is formed in the inner wall of the cylinder, and a communication pipe is formed in the top cover; the electrodialysis assembly comprises a first positive electrode cylinder, a first ion exchange membrane, a first negative electrode cylinder, a second ion exchange membrane and a second positive electrode cylinder, the top of the first positive electrode cylinder is fixedly connected with 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 negative electrode cylinder, the second ion exchange membrane and the second positive electrode cylinder are sequentially sleeved in the first positive electrode cylinder, and the first ion exchange membrane, the first negative electrode cylinder, the second ion exchange membrane and the second positive electrode cylinder are fixedly connected with the top cover; the stirring assembly comprises a first spiral plate, the inner side of the first spiral plate is fixedly connected with the outer wall of the first positive electrode cylinder, and the outer side of the first spiral plate is slidingly connected with the inner wall of the cylinder.

[0006] In an embodiment: the stirring assembly further comprises a second spiral plate and a third spiral plate, the inner side of the second spiral plate is fixedly connected with the first negative electrode cylinder, 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 with the first negative electrode cylinder, and a gap is left between the inner side of the third spiral plate and the second ion exchange membrane.

[0007] In an 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 an embodiment: the space between the first negative electrode cylinder and the second ion exchange membrane is communicated with the inner groove, the space between the first ion exchange membrane and the first negative electrode cylinder is communicated with one end of the communication pipe, and the other end of the communication pipe is communicated with the top of the space between the second ion exchange membrane and the second positive electrode cylinder.

[0009] In an embodiment: the outer wall of the second positive electrode cylinder is fixedly connected with a fixed plate, and the top of the fixed plate is fixedly connected with the bottom of the second ion exchange membrane.

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

[0011] In an embodiment: the bottom of the first ion exchange membrane is fixedly connected with a fixed ring, an annular groove is arranged on the bottom wall of the cylinder corresponding to the fixed ring, and the fixed ring is rotationally connected with the annular groove.

[0012] In an embodiment: the outer wall of the fixed column is fixedly connected with a 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 receiving cylinder, the top of the first receiving cylinder is rotatably connected to the second receiving cylinder, the outer wall of the second receiving cylinder is fixedly connected to a limiting ring, two limiting rings are provided, the two limiting rings are respectively located on both sides of the top wall of the second receiving cylinder, the second receiving cylinder is connected to one end of the discharge pipe, and the outer wall of the first receiving cylinder is fixedly connected to the top cover.

[0014] In one embodiment, the system further includes a drive assembly comprising a motor, a drive shaft, a first gear, and a second gear. The motor is connected to the drive shaft, the drive shaft is fixedly connected to the first gear, the first gear meshes with the second gear, and the motor is mounted on the outer wall of the cylinder via a motor mount.

[0015] The beneficial effects of this disclosure are as follows: When the top cover rotates, it drives the first positive electrode cylinder to rotate, which in turn drives the first spiral plate to rotate. When the first spiral plate rotates, it applies a downward pressure to the raw material liquid, causing the raw material liquid to enter the space between the first positive electrode cylinder and the first ion exchange membrane. This facilitates the passage of lithium chloride ions, sodium ions, and potassium ions through the first ion exchange membrane into the space between the first ion exchange membrane and the first cathode cylinder. After a single purification, a concentrated solution is formed. Furthermore, the raw material liquid can be stirred and mixed, accelerating the movement of cations in the raw material liquid, which is beneficial to improving the extraction efficiency. It can also perform a secondary purification of the raw material liquid, which is beneficial to improving the purity of the purified solution. Moreover, the device occupies a smaller area and has a higher utilization rate of the internal space of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this disclosure.

[0017] Figure 2 This is a cross-sectional view of the overall structure in an embodiment of this disclosure.

[0018] Figure 3 For the embodiments of this disclosure Figure 2 Enlarged diagram of point B in the middle.

[0019] Figure 4 This is a cross-sectional view of the cylinder in an embodiment of this disclosure.

[0020] Figure 5 For the embodiments of this disclosure Figure 2 Enlarged diagram of point C in the middle.

[0021] Figure 6 This is a cross-sectional view of the top cover and electrodialysis assembly in an embodiment of this disclosure.

[0022] Figure 7 For the embodiments of this disclosure Figure 1 Enlarged diagram of point A in the middle.

[0023] The drawing reference: containing assembly 1, barrel 11, inner groove 111, annular groove 112, top cover 12, communication pipe 121, feeding pipe 13, electrodialysis assembly 2, first positive electrode barrel 21, first ion exchange membrane 22, first cathode barrel 23, second ion exchange membrane 24, second positive electrode barrel 25, fixed plate 251, fixed rod 252, fourth spiral plate 253, fixed column 254, first containing barrel 26, limiting ring 261, discharge pipe 262, second containing barrel 27, stirring assembly 3, first spiral plate 31, second spiral plate 32, third spiral plate 33, driving assembly 4, motor 41, motor base 411, drive shaft 42, first gear 43, second gear 44. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific embodiments of the present disclosure will be described in detail below with reference to the drawings of the specification. EMBODIMENT

[0025] REFERENCE Figure 1 AND Figure 2 The embodiment provides a salt lake lithium extraction electrodialysis device, which comprises a containing assembly 1, an electrodialysis assembly 2 and a stirring assembly 3. The containing assembly 1 comprises a barrel 11, a top cover 12 and a feeding pipe 13. The barrel 11 is rotationally connected with the top cover 12 at the top. The barrel 11 is communicated with one end of the feeding pipe 13. An inner groove 111 is formed in the inner wall of the barrel 11. A communication pipe 121 is formed in the top cover 12.

[0026] In some embodiments, the barrel 11 is used for containing raw material liquid. The barrel 11 is in a cylindrical shape. The top cover 12 can rotate on the barrel 11. The feeding pipe 13 is used for adding raw material liquid into the barrel 11.

[0027] The electrodialysis assembly 2 comprises a first positive electrode barrel 21, a first ion exchange membrane 22, a first cathode barrel 23, a second ion exchange membrane 24 and a second positive electrode barrel 25. The first positive electrode barrel 21 is fixedly connected with the top cover 12 at the top. There is a gap between the bottom of the first positive electrode barrel 21 and the bottom wall of the barrel 11. The first ion exchange membrane 22, the first cathode barrel 23, the second ion exchange membrane 24 and the second positive electrode barrel 25 are sequentially sleeved in the first positive electrode barrel 21. The first ion exchange membrane 22, the first cathode barrel 23, the second ion exchange membrane 24 and the second positive electrode barrel 25 are fixedly connected with the top cover 12 respectively.

[0028] In some embodiments, the first positive electrode cylinder 21, the first ion exchange membrane 22, the first negative electrode cylinder 23, the second ion exchange membrane 24 and the second positive electrode cylinder 25 can be optionally provided with a cylindrical cylinder, and are concentrically arranged. The top cover 12 can drive the first ion exchange membrane 22, the first negative electrode cylinder 23, the second ion exchange membrane 24 and the second positive electrode cylinder 25 to move when the top cover 12 is lifted and moved. After the raw material liquid is added into the cylinder body 11 from the feeding pipe 13, the first positive electrode cylinder 21 repels the cations of the lithium chloride ions, sodium ions and potassium ions in the raw material liquid, while the first negative electrode 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 first ion exchange membrane 22 into the space between the first ion exchange membrane 22 and the first negative electrode cylinder 23, are purified once to form a concentrated liquid, and then the concentrated liquid enters the space between the second ion exchange membrane 24 and the second positive electrode cylinder 25 through the communication pipe 121. The second positive electrode cylinder 25 repels the cations of the lithium chloride ions, sodium ions and potassium ions in the concentrated liquid, while the first negative electrode 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, are purified twice to form a purified liquid, and then the purified liquid enters the space between the first negative electrode cylinder 23 and the second ion exchange membrane 24, and then enters the bottom of the second positive electrode cylinder 25 through the inner groove 111. Then the purified liquid is discharged from the top of the second positive electrode cylinder 25, and the purification of the cations of the lithium chloride ions, sodium ions and potassium ions is completed. The raw material liquid can be purified twice, which is beneficial to improve the purity of the purified liquid, and the device occupies a smaller area and has a higher utilization rate of the internal space.

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

[0030] In some embodiments, the top cover 12 can drive the first positive electrode cylinder 21 to rotate when the top cover 12 is rotated. The first positive electrode cylinder 21 can drive the first spiral plate 31 to rotate. When the first spiral plate 31 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 21 and the first ion exchange membrane 22. This facilitates the cations of the lithium chloride ions, sodium ions and potassium ions to pass through the first ion exchange membrane 22 into the space between the first ion exchange membrane 22 and the first negative electrode cylinder 23, are purified once to form a concentrated liquid, and the raw material liquid can be stirred and mixed, which accelerates the movement of the cations in the raw material liquid and is beneficial to improve the extraction efficiency. Embodiment

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

[0032] The stirring assembly 3 further comprises a second spiral plate 32 and a third spiral plate 33, the first cathode cylinder 23 is fixedly connected to the inner side of the second spiral plate 32, and a gap is left between the outer side of the second spiral plate 32 and the first ion exchange membrane 22, the first cathode cylinder 23 is fixedly connected to the outer side of the third spiral plate 33, 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, the top cover 12 can rotate the first cathode cylinder 23, the first cathode cylinder 23 can drive the second spiral plate 32 and the third spiral plate 33 to rotate, the second spiral plate 32 or the third spiral plate 33 can assist the movement of cations in the concentrated solution or the purified solution, and the extraction efficiency is improved.

[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 cylinder 23 and the second ion exchange membrane 24 is communicated with the inner groove 111, the space between the first ion exchange membrane 22 and the first cathode cylinder 23 is communicated with one end of the communication pipe 121, and the other end of the communication pipe 121 is communicated with the top of the space between the second ion exchange membrane 24 and the second anode cylinder 25.

[0036] In some embodiments, when the second spiral plate 32 rotates, an upward force can be applied to the concentrated solution in the space between the first ion exchange membrane 22 and the first cathode cylinder 23, the concentrated solution enters the space between the second ion exchange membrane 24 and the second anode cylinder 25 through the communication pipe 121, the second anode cylinder 25 repels the cations of chloridion, sodium ion and potassium ion in the concentrated solution, and the first cathode cylinder 23 attracts the cations of chloridion, sodium ion and potassium ion, the cations of chloridion, sodium ion and potassium ion pass through the second ion exchange membrane 24, and after secondary purification, the purified solution is formed.

[0037] Further, the purified liquid enters the space between the first cathode cylinder 23 and the second ion exchange membrane 24, and the third spiral plate 33 can provide a downward force to the purified liquid in the space between the first cathode cylinder 23 and the second ion exchange membrane 24 when rotating, guiding the purified liquid into the inner groove 111, preventing the accumulation of purified liquid rich in lithium chloride ions, sodium ions and potassium ions in the space between the first cathode cylinder 23 and the second ion exchange membrane 24, affecting the extraction efficiency, and then the purified liquid enters the bottom of the second anode cylinder 25 through the inner groove 111, and then the purified liquid is discharged from the top of the second anode cylinder 25, completing the purification of the cations of lithium chloride ions, sodium ions and potassium ions. The raw material liquid can be purified twice, which is beneficial to improve the purity of the purified liquid, and the device occupies less area and has higher utilization rate of internal space.

[0038] The outer wall of the second anode cylinder 25 is fixedly connected with a fixed plate 251, and the top of the fixed plate 251 is fixedly connected with the bottom of the second ion exchange membrane 24.

[0039] In some embodiments, the fixed plate 251 can close the bottom of the second ion exchange membrane 24 and the second anode cylinder 25, preventing the concentrated liquid in the space between the second ion exchange membrane 24 and the second anode cylinder 25 from directly entering the inner groove 111 from the bottom of the second ion exchange membrane 24 and the second anode cylinder 25.

[0040] The inner wall of the second anode cylinder 25 is fixedly connected with one end of a fixed rod 252, and the other end of the fixed rod 252 is fixedly connected with a fixed column 254.

[0041] In some embodiments, a plurality of fixed rods 252 are arranged between the fixed column 254 and the inner wall of the second anode cylinder 25, which can support the fixed column 254, and the fixed column 254 can be driven to rotate by the fixed rod 252 when the second anode cylinder 25 rotates.

[0042] The bottom of the first ion exchange membrane 22 is fixedly connected with a fixed ring, and the bottom wall of the cylinder body 11 is provided with an annular groove 112 corresponding to the fixed ring, and the fixed ring is rotatably connected with the annular groove 112.

[0043] In some embodiments, the fixed ring at the bottom of the first ion exchange membrane 22 is inserted into the annular groove 112, which can prevent the raw material liquid from passing through the bottom of the first ion exchange membrane 22 and affecting the purity of the concentrated liquid. When the first ion exchange membrane 22 rotates, the fixed ring can drive the rotation in the annular groove 112.

[0044] The outer wall of the fixed column 254 is fixedly connected with a 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, the second positive cylinder 25 can drive the fixed column 254 to rotate through the fixed rod 252, the fourth spiral plate 253 to rotate, and the purified liquid to have an upward force, so as to facilitate the discharge of the purified liquid.

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

[0047] In some embodiments, the first containing cylinder 26 can rotate relative to the outer wall of the second containing cylinder 27, the limiting ring 261 can fix the position of the second containing cylinder 27 to prevent the second containing cylinder 27 from axially sliding. When the second positive cylinder 25 rotates, the fixed column 254 can be driven to rotate through the fixed rod 252, the fourth spiral plate 253 is driven to rotate by the fixed column 254, and the purified liquid has an upward force. The purified liquid enters the first containing cylinder 26 and the second containing cylinder 27, and then is discharged from the discharge pipe 262.

[0048] The driving assembly 4 comprises an electric motor 41, a driving shaft 42, a first gear 43 and a second gear 44, the electric 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 electric motor 41 is installed on the outer wall of the cylinder body 11 through the motor base 411.

[0049] In some embodiments, the electric motor 41 can drive the driving shaft 42 to rotate when working, the driving 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 body 11 to rotate, the first positive 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 the second positive cylinder 25 can drive the fixed column 254 to rotate through the fixed rod 252 when rotating, the fixed column 254 drives the fourth spiral plate 253 to rotate, and the raw material liquid, the concentrated liquid and the purified liquid in the cylinder body 11 flow faster, which is conducive to improving the extraction efficiency.

Claims

1. A lithium extraction electrodialysis device for salt lakes, characterized in that: The utility model relates to a kind of electrochemical water treatment device, including Accommodate component (1), the accommodate component (1) includes cylinder (11), top cover (12) and feeding pipe (13), the cylinder (11) top rotatablely connected top cover (12), cylinder (11) is communicated with the one end of feeding pipe (13), inner wall of cylinder (11) is opened with inner groove (111), top cover (12) is opened with communicating pipe (121); Electrodialysis component (2), the electrodialysis component (2) includes first positive electrode cylinder (21), first ion exchange membrane (22), first cathode cylinder (23), second ion exchange membrane (24) and second positive electrode cylinder (25), the first positive electrode cylinder (21) top is fixedly connected with top cover (12), and the first positive electrode cylinder (21) bottom is left with gap between cylinder (11) bottom wall, first ion exchange membrane (22), first cathode cylinder (23), second ion exchange membrane (24) and second positive electrode cylinder (25) are sequentially set in the first positive electrode cylinder (21) inside, and first ion exchange membrane (22), first cathode cylinder (23), second ion exchange membrane (24) and second positive electrode cylinder (25) are fixedly connected with top cover (12) respectively; Stirring assembly (3), the stirring assembly (3) includes first spiral plate (31), the first spiral plate (31) inboard is fixedly connected with the outer wall of first positive electrode cylinder (21), and the first spiral plate (31) outboard is slidably connected with the inner wall of cylinder (11).

2. The lithium recovery electrodialysis device of claim 1, wherein: The stirring assembly (3) further includes second spiral plate (32) and third spiral plate (33), the second spiral plate (32) inboard is fixedly connected with first cathode cylinder (23), and the second spiral plate (32) outboard is left with gap between first ion exchange membrane (22), the third spiral plate (33) outboard is fixedly connected with first cathode cylinder (23), and the third spiral plate (33) inboard is left with gap between second ion exchange membrane (24).

3. The lithium recovery electrodialysis device of claim 2, wherein: The spiral direction of the second spiral plate (32) is opposite to the first spiral plate (31) and the third spiral plate (33).

4. The lithium recovery electrodialysis device of claim 3, wherein: The space between the first cathode cylinder (23) and second ion exchange membrane (24) is communicated with inner groove (111), the space between first ion exchange membrane (22) and first cathode cylinder (23) top is communicated with one end of communicating pipe (121), and the other end of communicating pipe (121) is communicated with the space top between second ion exchange membrane (24) and second positive electrode cylinder (25).

5. The salt lake lithium extraction electrodialysis unit of claim 4, wherein: The outer wall of the second positive electrode cylinder (25) is fixedly connected with fixed plate (251), and the fixed plate (251) top is fixedly connected with the bottom of second ion exchange membrane (24).

6. The salt lake lithium extraction electrodialysis unit of claim 5, wherein: The inner wall of the second positive electrode cylinder (25) is fixedly connected with one end of fixed rod (252), and the other end of fixed rod (252) is fixedly connected with fixed column (254).

7. The salt lake lithium extraction electrodialysis unit of claim 6, wherein: The bottom of the first ion exchange membrane (22) is fixedly connected with fixed ring, and the bottom wall of cylinder (11) is provided with annular groove (112) corresponding to fixed ring, and fixed ring is rotatably connected with annular groove (112).

8. The lithium recovery electrodialysis device of claim 6, wherein: The outer wall of the fixed column (254) is fixedly connected with fourth spiral plate (253), and the spiral direction of the fourth spiral plate (253) is same with the second spiral plate (32).

9. The lithium recovery electrodialysis device of claim 5, wherein: The second positive pole cylinder (25) is fixedly connected with the bottom of the first containing cylinder (26), the top of the first containing cylinder (26) is rotatably connected with the second containing cylinder (27), the outer wall of the second containing cylinder (27) is fixedly connected with the limiting ring (261), the limiting ring (261) is provided with two, the two limiting rings (261) are respectively located on the two sides of the top wall of the second containing cylinder (27), the second containing cylinder (27) is connected with one end of the discharge pipe (262), and the outer wall of the first containing cylinder (26) is fixedly connected with the top cover (12).

10. The lithium recovery electrodialysis device of claim 2, wherein: Further comprising a driving assembly (4), the driving assembly (4) comprises a motor (41), a driving shaft (42), a first gear (43) and a second gear (44), the motor (41) is connected with the driving shaft (42), the driving shaft (42) is fixedly connected with the first gear (43), the first gear (43) is meshingly connected with the second gear (44), and the motor (41) is installed on the outer wall of the cylinder body (11) through a motor base (411).

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