Environment-friendly device for extracting lithium from salt lake

Abstract

The utility model discloses a salt lake lithium extraction environmental protection device relates to salt lake lithium extraction technical field, including support subassembly, nanofiltration membrane subassembly, the support subassembly is composed of outer cylindrical shell, water inlet end cover, water outlet end cover, the inside of outer cylindrical shell is provided with a plurality of nanofiltration membrane subassembly, one nanofiltration membrane subassembly is distributed in the inside middle of outer cylindrical shell, and the other nanofiltration membrane subassembly is distributed in the inside middle of outer cylindrical shell. The other nanofiltration membrane assemblies are annularly distributed in the center of the outer barrel shell, and the multiple nanofiltration membrane assemblies are used for increasing the filtering area and improving the filtering efficiency. According to the utility model, the bracket assembly is arranged to realize the combination and fixation of the plurality of groups of nanofiltration membrane assemblies, and the plurality of groups of nanofiltration membrane assemblies synchronously filter during the membrane separation operation of salt lake lithium extraction, so that compared with the traditional filter structure of a single group of nanofiltration membrane assemblies, the filter structure not only has larger filter area and higher filter efficiency, but also has better filter effect. The condition of blockage can be better avoided, stable filtration can be kept for a longer time, and the working efficiency of extracting lithium from the salt lake can be further improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium extraction technology from salt lakes, specifically to an environmental protection device for lithium extraction from salt lakes. Background Technology

[0002] Lithium extraction from salt lakes refers to the technology of extracting lithium from salt lake brine. Methods include: precipitation, where a precipitant is added to the brine to precipitate lithium ions; adsorption, where materials selectively adsorb lithium ions from the brine, followed by elution to obtain a lithium solution; extraction, where organic solvents are used to selectively extract lithium ions, separating them from other ions; and membrane separation, which uses special membrane materials to allow lithium ions to pass through while blocking other ions.

[0003] The membrane separation method for lithium extraction from salt lakes mainly uses nanofiltration membranes for filtration. The main working principle of nanofiltration membranes is a membrane separation process driven by pressure difference. Applying a certain pressure difference across the membrane allows some solvent and components smaller than the membrane pore size to pass through the membrane, while particles, macromolecules, salts, etc. larger than the membrane pore size are retained by the membrane, thus achieving the purpose of separation. Compared with traditional precipitation methods, lithium extraction using nanofiltration membranes has the advantages of simple process flow, small footprint, short production cycle, no waste discharge, green environmental protection, and no dangerous processes such as high pressure, flammability, and explosion.

[0004] However, when using nanofiltration membranes for lithium extraction from salt lakes, there is only one outlet pipe in the middle of the nanofiltration membrane, which affects the working efficiency of the nanofiltration membrane. Based on this, an environmental protection device for lithium extraction from salt lakes is provided. Utility Model Content

[0005] The purpose of this utility model is to provide an environmentally friendly lithium extraction device from salt lakes in order to solve the problems mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly lithium extraction device from salt lakes, comprising a support assembly and a nanofiltration membrane assembly. The support assembly consists of an outer shell, an inlet end cap, and an outlet end cap. The inlet and outlet end caps are symmetrically fitted onto the outer ends of the outer shell. Multiple nanofiltration membrane assemblies are arranged on the inner side of the outer shell, with one nanofiltration membrane assembly located in the middle of the inner side of the outer shell, and the other nanofiltration membrane assemblies arranged in a ring around the center of the outer shell. The multiple nanofiltration membrane assemblies are used to increase the filtration area and efficiency.

[0007] As a further embodiment of this utility model: the nanofiltration membrane assembly consists of a nanofiltration membrane body and an outlet. The outlet extends from the inner side of the middle of the nanofiltration membrane body to one end of the outer side of the nanofiltration membrane body. The outlet end cap is formed with an annular cylinder for the outlet to pass through. The inner diameter of the annular cylinder matches the outer diameter of the outlet. The number and position of the annular cylinders correspond one-to-one with the number and position of the outlets.

[0008] As a further embodiment of this utility model: a manifold is connected to one end of the plurality of water outlets away from the water outlet end cap, and a discharge pipe is fixed to one end of the manifold away from the water outlet. The discharge pipe is connected to the plurality of water outlets through the manifold.

[0009] As a further embodiment of this utility model: a limiting post is fixed between the water inlet end cap and the water outlet end cap. Multiple limiting posts are provided, and the multiple limiting posts are evenly distributed between two adjacent nanofiltration membrane bodies and are attached to the outer wall of the nanofiltration membrane body to limit and fix the position of the nanofiltration membrane body.

[0010] As a further improvement of this utility model: there is a gap between the manifold and the outlet end cap, and the outer diameter of the manifold is smaller than the outer diameter of the outlet end cap.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] By setting up a support assembly to fix multiple nanofiltration membrane modules together, multiple nanofiltration membrane modules can filter simultaneously during the membrane separation operation of lithium extraction from salt lakes. Compared with the traditional single-unit nanofiltration membrane module filtration structure, it not only has a larger filtration area and faster filtration efficiency, but also better avoids clogging and can maintain stable filtration for a longer period of time, which can further improve the working efficiency of lithium extraction from salt lakes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0015] Figure 3 This is an exploded view of the structure of this utility model;

[0016] Figure 4 This is another perspective view of the disassembled state of this utility model.

[0017] In the diagram: 1. Support assembly; 101. Outer shell; 102. Inlet cap; 103. Outlet cap; 104. Limiting post; 2. Nanofiltration membrane assembly; 201. Nanofiltration membrane body; 202. Outlet; 3. Manifold; 4. Discharge pipe. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-4 In this embodiment of the utility model, the environmentally friendly lithium extraction device from salt lakes includes a support assembly 1 and a nanofiltration membrane assembly 2. The support assembly 1 consists of an outer shell 101, an inlet end cap 102, and an outlet end cap 103. The inlet end cap 102 and the outlet end cap 103 are symmetrically sleeved on the outer ends of the outer shell 101. Multiple nanofiltration membrane assemblies 2 are arranged on the inner side of the outer shell 101. One nanofiltration membrane assembly 2 is distributed in the middle of the inner side of the outer shell 101, and the other nanofiltration membrane assemblies 2 are arranged in a ring around the center of the outer shell 101. Multiple nanofiltration membrane assemblies 2 are used to increase the filtration area and efficiency.

[0020] The nanofiltration membrane module 2 consists of a nanofiltration membrane body 201 and an outlet 202. The outlet 202 extends from the inner side of the middle of the nanofiltration membrane body 201 to one outer end of the nanofiltration membrane body 201. An annular cylinder is formed on the outlet end cap 103 for the outlet 202 to pass through. The inner diameter of the annular cylinder matches the outer diameter of the outlet 202. The number and position of the annular cylinders correspond one-to-one with the number and position of the outlets 202.

[0021] A limiting post 104 is fixed between the water inlet end cap 102 and the water outlet end cap 103. Multiple limiting posts 104 are provided. The multiple limiting posts 104 are evenly distributed between two adjacent nanofiltration membrane bodies 201 and are attached to the outer wall of the nanofiltration membrane body 201 to limit and fix the position of the nanofiltration membrane body 201.

[0022] Multiple water outlets 202 are connected to a manifold box 3 at the end away from the water outlet end cap 103. A discharge pipe 4 is fixed at the end of the manifold box 3 away from the water outlet 202. The discharge pipe 4 is connected to the multiple water outlets 202 through the manifold box 3.

[0023] In this embodiment: by setting multiple nanofiltration membrane modules 2 inside the support assembly 1, multiple nanofiltration membrane modules 2 can filter simultaneously during the membrane separation operation of lithium extraction from salt lakes. Compared with the traditional single nanofiltration membrane module 2 filtration structure, it not only has a larger filtration area and faster filtration efficiency, but also can better avoid clogging and maintain stable filtration for a longer period of time, which can further improve the working efficiency of lithium extraction from salt lakes.

[0024] Furthermore, through the structural arrangement of the manifold 3 and the discharge pipe 4, the pure water discharged from the multiple nanofiltration membrane modules 2 through the outlet 202 can be gathered into the drain pipe 4 and discharged together. While achieving pipeline connectivity, during installation, it is only necessary to connect the drain pipe 4 to the external pipeline, which is the same as the traditional installation method.

[0025] Please refer to this carefully. Figures 2-4 There is a gap between the manifold 3 and the outlet end cap 103, and the outer diameter of the manifold 3 is smaller than the outer diameter of the outlet end cap 103.

[0026] In this embodiment, this structure ensures that the manifold 3 does not affect the discharge of filtered wastewater from the nanofiltration membrane body 201, thus guaranteeing stable equipment operation.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An environmentally friendly lithium extraction device from salt lakes, comprising a support assembly (1) and a nanofiltration membrane assembly (2), characterized in that, The support assembly (1) consists of an outer shell (101), an inlet cap (102), and an outlet cap (103). The inlet cap (102) and the outlet cap (103) are symmetrically fitted onto the outer ends of the outer shell (101). Multiple nanofiltration membrane assemblies (2) are provided on the inner side of the outer shell (101). One of the nanofiltration membrane assemblies (2) is located in the middle of the inner side of the outer shell (101), and the other nanofiltration membrane assemblies (2) are arranged in a ring around the center of the outer shell (101). Multiple nanofiltration membrane assemblies (2) are used to increase the filtration area and efficiency.

2. The environmentally friendly lithium extraction device from salt lakes according to claim 1, characterized in that, The nanofiltration membrane assembly (2) consists of a nanofiltration membrane body (201) and an outlet (202). The outlet (202) extends from the inner side of the middle of the nanofiltration membrane body (201) to one end of the outer side of the nanofiltration membrane body (201). The outlet end cap (103) has an annular cylinder formed on it for the outlet (202) to pass through. The inner diameter of the annular cylinder matches the outer diameter of the outlet (202). The number and position of the annular cylinders correspond one-to-one with the number and position of the outlets (202).

3. The environmentally friendly lithium extraction device from salt lakes according to claim 2, characterized in that, The ends of the multiple water outlets (202) away from the water outlet end cap (103) are connected to a manifold box (3). The end of the manifold box (3) away from the water outlet (202) is fixed with a discharge pipe (4). The discharge pipe (4) is connected to the multiple water outlets (202) through the manifold box (3).

4. The environmentally friendly lithium extraction device from salt lakes according to claim 2, characterized in that, A limiting post (104) is fixed between the water inlet end cap (102) and the water outlet end cap (103). Multiple limiting posts (104) are provided. The multiple limiting posts (104) are evenly distributed between two adjacent nanofiltration membrane bodies (201) and are attached to the outer wall of the nanofiltration membrane body (201) to limit and fix the position of the nanofiltration membrane body (201).

5. The environmentally friendly lithium extraction device from salt lakes according to claim 3, characterized in that, There is a gap between the manifold (3) and the outlet cap (103), and the outer diameter of the manifold (3) is smaller than the outer diameter of the outlet cap (103).

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