Device for extracting lithium from salt lake by electric de-intercalation method

Abstract

The utility model discloses a device for extracting lithium from a salt lake by using an electric de-intercalation method, which comprises at least two stacked mounting plates, one ends of the two adjacent mounting plates are rotationally connected, and an ionic membrane is arranged between the two adjacent mounting plates; each mounting plate is provided with a mounting cavity, a liquid inlet pipeline and a liquid outlet pipeline, a positive electrode and a negative electrode are mounted in every two adjacent mounting cavities respectively, and first annular sealing strips are arranged on the side, close to the ionic membrane, of the positive electrode and the side, close to the ionic membrane, of the negative electrode; according to the utility model, the two adjacent mounting plates form a box type structure, so that when the ionic membrane, the positive electrode, the negative electrode and the first annular sealing strip are replaced, only connection between the other ends of the two adjacent mounting plates needs to be canceled, and one of the mounting plates needs to be rotated, thereby reducing the assembly and disassembly difficulty of the device; and the mounting plate is provided with a mounting cavity, so that the first annular sealing strip, the positive electrode and the negative electrode can be directly placed during mounting, and the mounting and dismounting difficulty of the device is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium extraction from salt lakes, in particular to a device for extracting lithium from salt lakes using an electrical deintercalation method. Background Art

[0002] The existing salt lake lithium extraction device comprises a first pressing plate, an electrochemical deintercalation unit and a second pressing plate which are arranged in sequence, and the electrochemical deintercalation unit comprises a cathode plate, a first sealing ring, an ion membrane, a second sealing ring and an anode plate which are arranged in sequence. During assembly, the first pressing plate and the second pressing plate are close to each other, and then the first pressing plate and the second pressing plate jointly press and seal the electrochemical deintercalation unit.

[0003] The existing salt lake lithium extraction device is installed by pressing with a pressing plate, and has no positioning installation structure, which makes it difficult to install and disassemble the cathode electrode plate, the first sealing ring, the second sealing ring and the anode electrode plate. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a lithium extraction device for salt lakes using an electric deintercalation method.

[0005] The technical solution of the utility model is as follows: the salt lake lithium extraction device using the electric deintercalation method comprises at least two stacked mounting plates, one ends of two adjacent mounting plates are rotatably connected, the other ends of two adjacent mounting plates are detachably connected, and an ion membrane is arranged between the two adjacent mounting plates; each mounting plate has a mounting cavity, a liquid inlet pipe connected to the mounting cavity, and a liquid outlet pipe connected to the mounting cavity, the two adjacent mounting cavities are connected to each other and are respectively equipped with an anode electrode and a cathode electrode, the side of the anode electrode close to the ion membrane and the side of the cathode electrode close to the ion membrane are both provided with a first annular sealing strip for sealing the side of the mounting cavity, the side of the first annular sealing strip, the side of the anode electrode and the side of the cathode electrode all abut against the inner wall of the mounting cavity, and the end of the first annular sealing strip close to the ion membrane abuts against the ion membrane.

[0006] According to the electric deintercalation method of lithium extraction device from salt lake of the utility model, at least the following technical effects are achieved: one ends of two adjacent mounting plates are connected in a rotational manner, and the other ends of the two adjacent mounting plates are connected in a detachable manner, so that the two adjacent mounting plates form a box-type structure, and when replacing the ion membrane, the anode electrode, the cathode electrode and the first annular sealing strip, it is only necessary to cancel the connection between the other ends of the two adjacent mounting plates and rotate one of the mounting plates, thereby reducing the difficulty of assembly and disassembly of the device; and the mounting plate is provided with an installation cavity, so that the first annular sealing strip, the anode electrode and the cathode electrode can be positioned through the inner wall of the installation cavity during installation, so that direct placement is achieved without correcting the position, thereby further reducing the difficulty of assembly and disassembly of the device; each mounting plate is provided with a liquid inlet pipe and a liquid outlet pipe connected to the installation cavity, so as to avoid the problem of liquid cross-talk between two adjacent mounting cavities.

[0007] Furthermore, the side of the anode electrode close to the ion membrane, the side of the anode electrode away from the ion membrane, the side of the cathode electrode close to the ion membrane, and the side of the cathode electrode away from the ion membrane all have water distribution networks.

[0008] Furthermore, two sealing gaskets are arranged between two adjacent installation plates, the ion membrane is arranged between the two sealing gaskets, and the middle part of the sealing gasket has a communication port communicating with the installation cavity.

[0009] Furthermore, the installation cavity includes a first side wall and a second side wall that are arranged opposite to each other, the outlet end of the liquid inlet pipe is arranged on the first side wall, and the inlet end of the liquid outlet pipe is arranged on the second side wall.

[0010] Furthermore, the liquid inlet pipe and the liquid outlet pipe both include a first pipe and a plurality of second pipes, wherein the plurality of second pipes are arranged at intervals along the edge of the installation cavity, one end of the second pipe is connected to the installation cavity, and the two ends of the first pipe are respectively connected to the outside of the installation plate and the other end of the second pipe.

[0011] Furthermore, the diameter of the first pipe of the liquid inlet pipe gradually decreases along the liquid inlet direction of the liquid inlet pipe, and the diameter of the second pipe of the liquid inlet pipe gradually increases along the liquid inlet direction of the liquid inlet pipe.

[0012] Furthermore, the anode electrode and the cathode electrode both have pole ears, the mounting plate has a connecting cavity, two ends of the connecting cavity are respectively connected to the mounting cavity and the outside of the mounting plate, and the pole ears are placed in the connecting cavity.

[0013] Furthermore, the edges of the anode electrode away from the ion membrane and the edges of the cathode electrode away from the ion membrane are provided with a second annular sealing strip for sealing the side of the installation cavity, and a portion of the first annular sealing strip and a portion of the second annular sealing strip are placed in the connecting cavity.

[0014] Furthermore, the anode electrode and the cathode electrode both include a substrate, and a positive electrode material layer is coated on the surfaces on both sides of the substrate. The first annular sealing strip and the second annular sealing strip are respectively arranged outside the positive electrode material layer on the surfaces on both sides of the substrate, and the inner size of the first annular sealing strip and the inner size of the second annular sealing strip are both smaller than the outer size of the substrate.

[0015] Furthermore, a water distribution network is provided inside the first annular sealing strip and inside the second annular sealing strip.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Additional aspects and advantages of the present invention will become apparent and easily understood from the description of the technical solution in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of a salt lake lithium extraction device using the electrical deintercalation method according to the technical solution of the utility model;

[0019] Figure 2 This is an exploded view of a device for extracting lithium from salt lakes using the electro-extraction method;

[0020] Figure 3 This is a schematic diagram of the structure of one of the mounting plates;

[0021] Figure 4 This is an exploded view of one of the mounting panels;

[0022] Figure 5 is a schematic structural diagram of a first annular sealing strip and an anode electrode;

[0023] Figure 6 A cross-sectional view of the mounting plate.

[0024] Figure numerals: mounting plate 100, connecting cavity 101, butterfly hinge 102, ion membrane 110, mounting cavity 120, water distribution network 121, first side wall 122, second side wall 123, liquid inlet pipe 130, first pipe 131, second pipe 132, liquid outlet pipe 140, anode electrode 150, pole ear 151, substrate 152, outer side wall 153 of substrate, positive electrode material layer 154, cathode electrode 160, first annular sealing strip 170, inner wall 171 of the first annular sealing strip, sealing gasket 180, second annular sealing strip 190. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is described in detail below, and examples of the technical solution are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The technical solution described below with reference to the accompanying drawings is exemplary and is only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Reference Figure 1 As shown, the salt lake lithium extraction device provided in the embodiment of the utility model by the electro-deintercalation method includes at least two stacked mounting plates 100, one end of two adjacent mounting plates 100 is rotatably connected, and the other end of two adjacent mounting plates 100 is detachably connected, such as Figure 2 As shown, an ion membrane 110 is arranged between two adjacent mounting plates 100; each mounting plate 100 has a mounting cavity 120, a liquid inlet pipe 130 communicating with the mounting cavity 120, and a liquid outlet pipe 140 communicating with the mounting cavity 120. The two adjacent mounting cavities 120 are connected to each other and are respectively installed with an anode electrode 150 and a cathode electrode 160. Figure 2 , 3 As shown in 4, the side of the anode electrode 150 close to the ion membrane 110 and the side of the cathode electrode 160 close to the ion membrane 110 are both provided with a first annular sealing strip 170 for sealing the side of the installation cavity 120. The side of the first annular sealing strip 170, the side of the anode electrode 150 and the side of the cathode electrode 160 all abut against the inner wall of the installation cavity 120, and the end of the first annular sealing strip 170 close to the ion membrane 110 abuts against the ion membrane 110.

[0029] One ends of two adjacent mounting plates 100 are rotatably connected, and the other ends of two adjacent mounting plates 100 are detachably connected, so that the two adjacent mounting plates 100 form a box-type structure. When replacing the ion membrane 110, the anode electrode 150, the cathode electrode 160 and the first annular sealing strip 170, it is only necessary to cancel the connection between the other ends of the two adjacent mounting plates 100 and rotate one of the mounting plates 100, thereby reducing the difficulty of assembly and disassembly of the device and facilitating assembly and disassembly testing.

[0030] In the prior art, the cathode electrode, the first sealing ring, the ion membrane, the second sealing ring and the anode electrode are pressed together by a pressing plate, and there is no positioning structure. Therefore, the position of the anode electrode, the cathode electrode, the first sealing ring and the second sealing ring need to be positioned and aligned each time they are installed, thereby increasing the difficulty of assembly and disassembly of the device. Figure 3 , 4 As shown, the utility model is provided with a mounting cavity 120 on the mounting plate 100, and the shapes of the first annular sealing strip 170, the anode electrode 150 and the cathode electrode 160 can match the shape of the mounting cavity 120. When the first annular sealing strip 170 and the anode electrode 150 are installed, they can be positioned by abutting their sides against the inner wall of the mounting cavity 120, so that the first annular sealing strip 170 and the anode electrode 150 do not need to correct their positions when they are installed. The first annular sealing strip 170 and the anode electrode 150 can be directly placed in the mounting cavity 120, thereby further reducing the difficulty of assembly and disassembly of the device;

[0031] Each mounting plate 100 is provided with a liquid inlet pipe 130 and a liquid outlet pipe 140 connected to the mounting cavity 120, that is, each mounting cavity 120 has its own liquid inlet pipe 130 and liquid outlet pipe 140, thereby avoiding the problem of liquid cross-contamination caused by the existing multiple demolding grooves being connected to one liquid inlet pipe and one liquid outlet pipe.

[0032] Specifically, Figure 1 As shown, one end of two adjacent mounting plates 100 can be rotatably connected by a butterfly hinge 102; the other ends of two adjacent mounting plates 100 can be fastened by bolts (not shown in the figure) or fixed by snap-fit ​​(not shown in the figure) to ensure the sealing between the two mounting plates 100; the mounting plates 100 can be made of transparent material to facilitate observation of the solution in the mounting cavity 120 during the test, and the transparent material can be PVC; Figure 5 As shown, the first annular sealing strip 170 is disposed on the edges of the anode electrode 150 and the cathode electrode 160. Figure 3As shown, the first annular sealing strip 170 is used to seal the gap between the side of the anode electrode 150 or the side of the cathode electrode 160 and the inner wall of the installation cavity 120 to ensure that two adjacent installation cavities 120 can only communicate through the hollow portion of the first annular sealing strip 170 .

[0033] Taking two mounting plates 100 as an example, when the device is working, brine and lithium-rich liquid are respectively injected into the liquid inlet pipes 130 of the two mounting cavities 120 through an external peristaltic pump, and then flow out through the liquid outlet pipe 140 and flow back to the peristaltic pump. At the same time, the external circuit supplies power to the cathode electrode 160 and the anode electrode 150. After the cathode electrode 160 and the anode electrode 150 are energized, lithium ion embedding and delithiation reactions are carried out in the mounting cavity 120. When the cathode electrode 160 is saturated with lithium, the solutions in the two mounting cavities 120 are replaced through an external pipe, and the positive and negative poles of the external circuit are interchanged, so that the cathode electrode 160 that was originally saturated with lithium becomes the anode electrode 150 and delithium is removed in the lithium-rich liquid, thereby realizing the enrichment of lithium ions in the brine in the lithium-rich liquid.

[0034] Furthermore, if Figure 2 , 3 As shown, the side of the anode electrode 150 close to the ion membrane 110, the side of the anode electrode 150 away from the ion membrane 110, the side of the cathode electrode 160 close to the ion membrane 110, and the side of the cathode electrode 160 away from the ion membrane 110 are all provided with a water distribution network 121; by providing the water distribution network 121 on both sides of the anode electrode 150 and both sides of the cathode electrode 160, the solution can be evenly distributed on the surface of the electrode plate, thereby improving the lithium extraction effect.

[0035] Furthermore, if Figure 1 , 2 As shown, two sealing gaskets 180 are arranged between two adjacent mounting plates 100, and the ion membrane 110 is arranged between the two sealing gaskets 180. The middle part of the sealing gasket 180 has a connecting port (not shown in the figure) connected to the mounting cavity 120; the sealing gasket 180 can support the ion membrane 110, extend the service life of the ion membrane 110, and ensure the sealing between the two mounting plates 100, so that the two mounting cavities 120 are connected only through the connecting port.

[0036] Furthermore, if Figure 2 As shown, the installation cavity 120 includes a first side wall 122 and a second side wall 123 that are arranged opposite to each other, the outlet end of the liquid inlet pipe 130 is arranged on the first side wall 122, and the inlet end of the liquid outlet pipe 140 is arranged on the second side wall 123, so that the solution can be evenly distributed on the surface of the electrode plate; specifically, the installation cavity 120 has two long sides and two short sides, the outlet end of the liquid inlet pipe 130 is located on one of the short sides, and the inlet end of the liquid outlet pipe 140 is located on the other short side.

[0037] Furthermore, if Figure 6As shown, both the liquid inlet pipe 130 and the liquid outlet pipe 140 include a first pipe 131 and a plurality of second pipes 132, wherein the plurality of second pipes 132 are arranged at intervals along the edge of the mounting cavity 120, one end of the second pipe 132 is connected to the mounting cavity 120, and the two ends of the first pipe 131 are respectively connected to the outside of the mounting plate 100 and the other end of the second pipe 132; by providing a plurality of second pipes 132, the solution can be evenly distributed on the surface of the electrode plate.

[0038] Furthermore, if Figure 6 As shown, the diameter of the first pipe 131 of the liquid inlet pipe 130 gradually decreases along the liquid inlet direction of the liquid inlet pipe 130, ensuring the consistency of the hydraulic pressure of the second pipe 132 at different positions, and the diameter of the second pipe 132 of the liquid inlet pipe 130 gradually increases along the liquid inlet direction of the liquid inlet pipe 130, reducing the solution scouring force, so that the coating material is more firmly arranged on the surface of the plate.

[0039] Furthermore, if Figure 3 , 4 As shown, both the positive electrode 150 and the negative electrode 160 have a pole ear 151, and the mounting plate 100 has a connecting cavity 101. The two ends of the connecting cavity 101 are respectively connected to the mounting cavity 120 and the outside of the mounting plate 100, and the pole ear 151 is placed in the connecting cavity 101; by providing the connecting cavity 101 and the pole ear 151, it is convenient to connect the electrode plate to an external external power source.

[0040] Furthermore, if Figure 2 As shown, the edges of the anode electrode 150 away from the ion membrane 110 and the edges of the cathode electrode 160 away from the ion membrane 110 are provided with a second annular sealing strip 190, and the second annular sealing strip 190 is used to seal the gap between the side of the anode electrode 150 or the side of the cathode electrode 160 and the inner wall of the installation cavity 120, as shown in FIG. Figure 3 As shown, a portion of the first annular sealing strip 170 and a portion of the second annular sealing strip 190 are placed in the connecting cavity 101 , and the installation cavity 120 is provided with the first annular sealing strip 170 and the second annular sealing strip 190 to ensure the sealing of the installation cavity 120 .

[0041] Furthermore, if Figure 5As shown, both the anode electrode 150 and the cathode electrode 160 include a substrate 152, and positive electrode material layers 154 are coated on the surfaces of both sides of the substrate 152. The first annular sealing strip 170 and the second annular sealing strip 190 are respectively sleeved on the outside of the positive electrode material layers 154 on the surfaces of both sides of the substrate 152. The inner size of the first annular sealing strip 170 and the inner size of the second annular sealing strip 190 are smaller than the outer size of the substrate 152, that is, the inner wall 171 of the first annular sealing strip 170 and the inner wall of the second annular sealing strip 190 are both located inside the outer wall 153 of the substrate 152; the positive electrode material layer 154 is located inside the first annular sealing strip 170 to ensure that all the solution is in contact with the positive electrode material layer 154; specifically, the substrate 152 is a mesh plate, and the side of the mesh plate also has mesh holes. When working, the solution can enter the installation cavity 120 through the mesh holes on the side of the mesh plate.

[0042] Furthermore, if Figure 2 As shown, there are water distribution nets inside the first annular sealing strip 170 and the second annular sealing strip 190, that is, the positive electrode material layer 154 and the water distribution net are both located inside the first annular sealing strip 170 and the second annular sealing strip 190, which not only ensures the sealing of the cavity, but also ensures that the solution is evenly distributed on the surface of the electrode plate.

[0043] Although the technical solutions of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the technical solutions without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A device for extracting lithium from salt lakes by electro-deintercalation, characterized in that: include: At least two stacked mounting plates (100), one ends of two adjacent mounting plates (100) being rotatably connected, the other ends of two adjacent mounting plates (100) being detachably connected, and an ion membrane (110) being arranged between the two adjacent mounting plates (100); Each of the mounting plates (100) comprises a mounting cavity (120), a liquid inlet pipe (130) communicating with the mounting cavity (120), and a liquid outlet pipe (140) communicating with the mounting cavity (120); two adjacent mounting cavities (120) are communicated with each other and are respectively provided with an anode electrode (150) and a cathode electrode (160); a first annular sealing strip (170) for sealing the side of the mounting cavity (120) is provided on the side of the anode electrode (150) close to the ion membrane (110) and a side of the cathode electrode (160) close to the ion membrane (110); the side of the first annular sealing strip (170), the side of the anode electrode (150), and the side of the cathode electrode (160) all abut against the inner wall of the mounting cavity (120); and one end of the first annular sealing strip (170) close to the ion membrane (110) abuts against the ion membrane (110).

2. The device for extracting lithium from salt lakes by electro-deintercalation method according to claim 1, characterized in that: The side of the anode electrode (150) close to the ion membrane (110), the side of the anode electrode (150) away from the ion membrane (110), the side of the cathode electrode (160) close to the ion membrane (110), and the side of the cathode electrode (160) away from the ion membrane (110) all have a water distribution network (121).

3. The device for extracting lithium from salt lakes by electro-deintercalation method according to claim 1, characterized in that: Two sealing gaskets (180) are arranged between two adjacent installation plates (100), the ion membrane (110) is arranged between the two sealing gaskets (180), and the middle part of the sealing gasket (180) has a communication port communicating with the installation cavity (120).

4. The device for extracting lithium from salt lakes by electro-deintercalation method according to claim 1, characterized in that: The installation cavity (120) comprises a first side wall (122) and a second side wall (123) which are arranged opposite to each other, the outlet end of the liquid inlet pipe (130) is arranged on the first side wall (122), and the inlet end of the liquid outlet pipe (140) is arranged on the second side wall (123).

5. The device for extracting lithium from salt lakes by electro-deintercalation method according to claim 1 or 4, characterized in that: The liquid inlet pipe (130) and the liquid outlet pipe (140) both comprise a first pipe (131) and a plurality of second pipes (132); the plurality of second pipes (132) are arranged at intervals along the edge of the installation cavity (120); one end of the second pipe (132) is in communication with the installation cavity (120); and both ends of the first pipe (131) are in communication with the outside of the installation plate (100) and the other end of the second pipe (132), respectively.

6. The device for extracting lithium from salt lakes by electro-deintercalation method according to claim 5, characterized in that: The diameter of the first pipe (131) of the liquid inlet pipe (130) gradually decreases along the liquid inlet direction of the liquid inlet pipe (130), and the diameter of the second pipe (132) of the liquid inlet pipe (130) gradually increases along the liquid inlet direction of the liquid inlet pipe (130).

7. The device for extracting lithium from salt lakes by electro-deintercalation method according to claim 1, characterized in that: The anode electrode (150) and the cathode electrode (160) both have a pole ear (151), and the mounting plate (100) has a connecting cavity (101), the two ends of the connecting cavity (101) are respectively connected to the mounting cavity (120) and the outside of the mounting plate (100), and the pole ear (151) is placed in the connecting cavity (101).

8. The device for extracting lithium from salt lakes by electro-deintercalation method according to claim 7, characterized in that: The edges around the side of the anode electrode (150) away from the ion membrane (110) and the edges around the side of the cathode electrode (160) away from the ion membrane (110) are provided with a second annular sealing strip (190) for sealing the side of the installation cavity (120), and a portion of the first annular sealing strip (170) and a portion of the second annular sealing strip (190) are placed in the connecting cavity (101).

9. The device for extracting lithium from salt lakes by the electro-deintercalation method according to claim 8, characterized in that: The anode electrode (150) and the cathode electrode (160) both include a substrate (152), and positive electrode material layers (154) are coated on the surfaces on both sides of the substrate (152). The first annular sealing strip (170) and the second annular sealing strip (190) are respectively sleeved outside the positive electrode material layers (154) on the surfaces on both sides of the substrate (152), and the inner dimensions of the first annular sealing strip (170) and the inner dimensions of the second annular sealing strip (190) are both smaller than the outer dimensions of the substrate (152).

10. The device for extracting lithium from salt lakes by the electro-deintercalation method according to claim 8 or 9, characterized in that: Both the first annular sealing strip (170) and the second annular sealing strip (190) have water distribution nets inside.

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