A lithium liquid transfer device for an electrodialysis and ion exchange system

Abstract

This utility model discloses a lithium liquid transfer device for an electrodialysis and ion exchange system, relating to the field of chemical fluid transportation. It includes an electrodialysis outlet pipe, a main output pipe, and a pressure stabilizing pipe. The electrodialysis outlet pipe is tapered and gradually expanding, with spiral guide vanes installed inside. One end of the main output pipe is connected to the larger end of the electrodialysis outlet pipe via a flange. The pressure stabilizing pipe is installed on the main output pipe and has a dual-chamber design for automatically compensating for pressure differences. The smaller end of the electrodialysis outlet pipe is connected to the outlet flange of the electrodialysis equipment. The other end of the main output pipe is connected to the inlet of the ion exchange system via a rotary flange. This utility model effectively eliminates lithium liquid turbulence by forming a multi-stage flow channel buffer structure, reducing the impact on the ion exchange system and significantly extending the service life of the ion exchange resin. Simultaneously, the dual-chamber pressure stabilizing structure stabilizes the lithium liquid pressure within a certain range, ensuring the stability of the ion exchange process.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of chemical fluid transportation, specifically a lithium liquid transfer device for an electrodialysis and ion exchange system. Background Technology

[0002] In the production and processing of lithium liquid, electrodialysis and ion exchange (ion exchange) systems are two crucial links. Electrodialysis technology is mainly used to remove various ionic impurities in the solution to ensure the initial purification of the lithium liquid, while the ion exchange system further purifies and refines the lithium liquid with high precision to achieve higher purity requirements.

[0003] Traditional electrodialysis equipment typically uses simple straight pipe designs for its outlet pipelines. When lithium liquid flows out of the electrodialysis equipment, its high velocity causes turbulence to form directly in the main delivery pipeline. This turbulence not only destabilizes the flow of lithium liquid but also exerts a significant impact on the subsequent ion exchange system. This impact shortens the lifespan of the ion exchange resin and affects the overall efficiency and purification effect of the ion exchange system, ultimately reducing the quality of the final product. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a lithium liquid transfer device for an electrodialysis and ion exchange system to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A lithium liquid transfer device for an electrodialysis and ion exchange system includes an electrodialysis outlet pipe and a main output pipe. The electrodialysis outlet pipe is tapered and gradually expanding. A spiral guide vane is installed inside the electrodialysis outlet pipe. One end of the main output pipe is connected to the large end of the electrodialysis outlet pipe through a flange. The small end of the electrodialysis outlet pipe corresponds to the outlet of the electrodialysis equipment. The end of the main output pipe away from the electrodialysis outlet pipe corresponds to the inlet of the ion exchange system. The main output tube is equipped with a voltage regulator tube with adaptive inner diameter adjustment, which is used to automatically compensate for the pressure difference of the lithium liquid in the main output tube.

[0006] Specifically, in this technical solution, the spiral guide plate is welded to the inner wall of the electrodialysis outlet pipe, and the spiral guide plate extends from the small end to the large end of the electrodialysis outlet pipe.

[0007] Specifically, in this technical solution, the main output pipe includes a front section pipe connected to the electrodialysis outlet pipe and a rear section pipe for connecting the electrodialysis equipment, and the pressure stabilizing pipe is connected between the front section pipe and the rear section pipe.

[0008] Specifically, in this technical solution, the voltage stabilizing pipe includes a shell, an elastic diaphragm, and a sealing gasket. The shell is connected between the front section pipe and the rear section pipe, and is in communication with both the front section pipe and the rear section pipe. The elastic diaphragm is sealed and installed inside the housing by a sealing gasket, and a closed outer cavity is formed between the elastic diaphragm and the inner wall of the housing.

[0009] Specifically, in this technical solution, a portion of the inner wall of the housing and the elastic diaphragm form the inner cavity of the voltage regulator tube, and the inner cavity is connected to the main output tube.

[0010] Specifically, in this technical solution, the elastic diaphragm is sealed and installed on the inner walls of the openings at both ends of the housing by two sealing gaskets, and the sealing gaskets are fixedly connected to the inner walls of the openings at both ends of the housing by bolts. The elastic diaphragm forms the inner cavity of the voltage regulator tube, and the inner cavity is connected to the main output tube; the inner cavity and the outer cavity are coaxially sleeved.

[0011] Specifically, in this technical solution, both ends of the housing are mounted on the main output pipe via flanges. The diameter of the housing is larger than the diameter of the main output pipe, and the diameter of the inner cavity is the same as the diameter of the main output pipe.

[0012] Specifically, the outer cavity of this technical solution is filled with hydraulic oil.

[0013] Specifically, in this technical solution, a grating plate is installed on the inner wall of the main output pipe near the inlet of the AC system using clamps. The grating plate is composed of multiple hexagonal grids welded in a honeycomb pattern, and the thickness of the grating plate is 10-20mm.

[0014] In summary, the present invention has the following beneficial effects: by forming a multi-stage flow channel buffer structure, the turbulence of the lithium liquid is effectively eliminated, the impact on the ion exchange system is reduced, and the service life of the ion exchange resin is significantly extended. At the same time, the dual-cavity pressure stabilizing structure stabilizes the lithium liquid pressure within a certain range, ensuring the stability of the ion exchange process, improving the purification quality of the lithium liquid, reducing the defect rate, and improving production efficiency. Meanwhile, the modular design allows the transfer device to flexibly adjust the number of buffer units according to the production scale, adapting to different production scenarios and improving the adaptability of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the positive axis structure of the transfer device of this utility model; Figure 2 This is a schematic diagram of the inclined shaft side structure of the transfer device of this utility model; Figure 3 This is a cross-sectional structural diagram of the transfer device of this utility model.

[0016] Figure descriptions: 1. Electrodialysis outlet pipe; 101. Spiral guide vane; 2. Main output pipe; 3. Pressure stabilizing pipe; 301. Shell; 302. Elastic diaphragm; 3021. Sealing gasket; 303. Inner cavity; 304. Outer cavity; 4. Grating plate; 401. Hexagonal mesh. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0018] The embodiments of this utility model will be described below based on its overall structure.

[0019] In this embodiment, please refer to Figures 1-3 As shown, a lithium liquid transfer device for an electrodialysis and ion exchange system includes an electrodialysis outlet pipe 1 and a main output pipe 2. The electrodialysis outlet pipe 1 is a tapered, gradually expanding type, made of metal, such as stainless steel, and manufactured through machining. First, according to design requirements, the starting diameter, ending diameter, and length of the tapered section are determined. The starting diameter should match the outlet pipe diameter of the electrodialysis equipment. The ending diameter is designed based on the pipe diameter of the main output pipe 2 and the requirement to reduce the lithium liquid flow velocity. Generally, the ending diameter is 2-5 times larger than the starting diameter, and the length is usually 3-5 times the starting diameter. This structure allows the high-speed flowing lithium liquid to gradually decrease in velocity as it passes through. To create conditions for stable laminar flow, a spiral guide vane 101 is installed inside the electrodialysis outlet pipe 1. The spiral guide vane 101 is welded to the inner wall of the electrodialysis outlet pipe 1. The spiral guide vane 101 extends from the small end to the large end of the electrodialysis outlet pipe 1. The spiral guide vane 101 is also made of stainless steel and manufactured by stamping process. Under the guidance of the spiral guide vane 101, the lithium liquid flows along a specific spiral path, further promoting the formation of a stable laminar flow state of the lithium liquid. Through this design, turbulence can be effectively eliminated before the lithium liquid enters the main output pipe 2, reducing the impact on the ion exchange system, thereby protecting the ion exchange resin and extending its service life. One end of the main output pipe 2 is connected to the large end of the electrodialysis outlet pipe 1 through a flange. The small end of the electrodialysis outlet pipe 1 corresponds to the outlet of the electrodialysis equipment. The end of the main output pipe 2 away from the electrodialysis outlet pipe 1 corresponds to the inlet of the ion exchange system, that is, it is connected through a rotary flange. The rotary flange realizes the pipe connection through a ball joint structure, which can adjust the angle within a certain range. When there is a coaxiality deviation in the on-site pipe installation, the ball joint structure can automatically compensate within an angle range of ±5°. The main output pipe 2 is equipped with a pressure regulating pipe 3 with adaptive inner diameter adjustment, which is used to automatically compensate for the pressure difference of the lithium liquid in the main output pipe 2. The inner wall of the main output pipe 2 is equipped with a grid plate 4 near the inlet of the ion exchange system by clamps. The grid plate 4 is composed of multiple hexagonal grids 401 welded in a honeycomb pattern. The thickness of the grid plate 4 is 10-20mm. When the turbulent lithium liquid flows through the grid, the grid sorts and guides the lithium liquid, so that the lithium liquid flow gradually becomes a uniformly distributed parallel flow. The main output pipe 2 includes a front pipe connected to the electrodialysis outlet pipe 1 and a rear pipe for connecting the electrodialysis equipment. The pressure stabilizing pipe 3 is connected between the front pipe and the rear pipe. The pressure stabilizing pipe 3 includes a shell 301, an elastic diaphragm 302 and a sealing gasket 3021. The shell 301 is connected between the front pipe and the rear pipe and communicates with both the front pipe and the rear pipe. The shell 301 is made of high-strength plastic or metal. The elastic diaphragm 302 is made of rubber or polymer material with good elasticity and corrosion resistance. The elastic diaphragm 302 is sealed and installed inside the housing 301 by the sealing gasket 3021, and a closed outer cavity 304 is formed between the elastic diaphragm 302 and the inner wall of the housing 301. The outer cavity 304 is filled with hydraulic oil. The selection of hydraulic oil should be based on the working temperature range and pressure requirements. Generally, hydraulic oil with moderate viscosity and good oxidation resistance is selected. When filling with hydraulic oil, it should be ensured that there is no air residue inside the outer cavity 304. It can be filled by vacuum injection. Part of the inner wall of the housing 301 and the elastic diaphragm 302 form the inner cavity 303 of the pressure stabilizing pipe 3. The inner cavity 303 is connected to the main output pipe 2. The elastic diaphragm 302 is sealed and installed on the inner wall of the openings at both ends of the housing 301 by two sealing gaskets 3021, and the sealing gaskets 3021 are fixedly connected to the inner wall of the openings at both ends of the housing 301 by bolts. The elastic diaphragm 302 forms the inner cavity 303 of the pressure stabilizing tube 3, which is connected to the main output tube 2. The inner cavity 303 and the outer cavity 304 are coaxially fitted together. Both ends of the shell 301 are mounted on the main output tube 2 through flanges. The diameter of the shell 301 is larger than the diameter of the main output tube 2, and the diameter of the inner cavity 303 is the same as the diameter of the main output tube 2. When the electrodialysis outlet pressure fluctuates, the change in lithium liquid pressure is transmitted to the elastic diaphragm 302 of the inner cavity 303. The elastic diaphragm 302 automatically expands and contracts according to the pressure difference, thereby adjusting the volume of the inner cavity 303. When the pressure increases, the diaphragm extends towards the outer cavity 304, increasing the volume of the inner cavity 303 and buffering the lithium liquid pressure. When the pressure decreases, the diaphragm contracts inward, decreasing the volume of the inner cavity 303 and replenishing the lithium liquid pressure. In this way, the lithium liquid pressure entering the electrodiaphragm system is stabilized within the range of ±0.02MPa.

[0020] After the lithium liquid flows out of the electrodialysis equipment, it first enters the gradually expanding conical section. As the cross-sectional area of ​​the pipe gradually increases, the lithium liquid velocity decreases, and kinetic energy is converted into static pressure energy. The spiral guide vane 101 guides the lithium liquid in a spiral motion, making the movement direction of each particle in the lithium liquid tend to be consistent, thus forming a stable laminar flow. This laminar flow state of the lithium liquid enters the main output pipe 2 and can flow smoothly to the ion exchange system, avoiding the impact caused by turbulence. However, when the lithium liquid passes through the pressure stabilizing pipe 3 in the main output pipe 2, when the electrodialysis outlet pressure fluctuates, the change in lithium liquid pressure will be transmitted... The lithium liquid is delivered to the elastic diaphragm 302 of the inner cavity 303. The elastic diaphragm 302 automatically expands and contracts according to the pressure difference, adjusting the volume of the inner cavity 303. That is, when the pressure increases, the diaphragm extends towards the outer cavity 304, increasing the volume of the inner cavity 303 and buffering the lithium liquid pressure; when the pressure decreases, the diaphragm contracts inward, decreasing the volume of the inner cavity 303 and replenishing the lithium liquid pressure. When the lithium liquid passes through the grid plate 4, the hexagonal grid 401 combs and guides the lithium liquid, gradually transforming the lithium liquid flow into a uniformly distributed parallel flow, and finally entering the cross-linking system. This multi-stage flow channel buffer structure effectively eliminates lithium liquid turbulence, reduces the impact on the ion exchange system, and significantly extends the service life of the ion exchange resin. At the same time, the dual-cavity pressure stabilizing structure keeps the lithium liquid pressure within a certain range, ensuring the stability of the ion exchange process, improving the purification quality of the lithium liquid, reducing the defect rate, and increasing production efficiency. Furthermore, the modular design allows the transfer device to flexibly adjust the number of buffer units according to the production scale, adapting to different production scenarios and improving the adaptability of the device.

[0021] The working principle of this utility model is as follows: After the lithium liquid flows out of the electrodialysis equipment, it first enters the gradually expanding conical section. As the cross-sectional area of ​​the pipe gradually increases, the lithium liquid velocity decreases, and kinetic energy is converted into static pressure energy. The spiral guide vane 101 guides the lithium liquid in a spiral motion, making the movement direction of each particle in the lithium liquid tend to be consistent, thus forming a stable laminar flow. This laminar flow state of the lithium liquid enters the main output pipe 2 and can flow smoothly to the ion exchange system, avoiding the impact caused by turbulence. However, when the lithium liquid passes through the pressure stabilizing pipe 3 in the main output pipe 2, when the electrodialysis outlet pressure fluctuates, the change in lithium liquid pressure will be transmitted... The lithium liquid is delivered to the elastic diaphragm 302 of the inner cavity 303. The elastic diaphragm 302 automatically expands and contracts according to the pressure difference, adjusting the volume of the inner cavity 303. That is, when the pressure increases, the diaphragm extends towards the outer cavity 304, increasing the volume of the inner cavity 303 and buffering the lithium liquid pressure. When the pressure decreases, the diaphragm contracts inward, decreasing the volume of the inner cavity 303 and replenishing the lithium liquid pressure. When the lithium liquid passes through the grid plate 4, the hexagonal grid 401 combs and guides the lithium liquid, gradually transforming the lithium liquid flow into a uniformly distributed parallel flow, and finally entering the ion-exchange system.

[0022] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A lithium liquid transfer device of electrodialysis and ion exchange system, comprising an electrodialysis outlet pipe (1), a main output pipe (2), characterized in that, The electrodialysis outlet pipe (1) is tapered and gradually expanding. The electrodialysis outlet pipe (1) is equipped with a spiral guide plate (101). One end of the main output pipe (2) is connected to the large end of the electrodialysis outlet pipe (1) through a flange. The small end of the electrodialysis outlet pipe (1) corresponds to the outlet of the electrodialysis equipment. The end of the main output pipe (2) away from the electrodialysis outlet pipe (1) corresponds to the inlet of the ion exchange system. The main output tube (2) is equipped with a voltage regulator tube (3) with adaptive inner diameter adjustment, which is used to automatically compensate for the pressure difference of the lithium liquid in the main output tube (2).

2. The lithium solution transfer device of a lithium electrodialysis and lithium exchange system according to claim 1, wherein, The spiral guide vane (101) is welded to the inner wall of the electrodialysis outlet pipe (1), and the spiral guide vane (101) extends from the small end to the large end of the electrodialysis outlet pipe (1).

3. The lithium transfer device of a lithium electrodialysis and lithium exchange system according to claim 1, wherein, The main output pipe (2) includes a front pipe connected to the electrodialysis outlet pipe (1) and a rear pipe for connecting the electrodialysis equipment, and the pressure stabilizing pipe (3) is connected between the front pipe and the rear pipe.

4. The lithium solution transfer device of an electrodialysis and anion exchange system according to claim 3, wherein The pressure stabilizing pipe (3) includes a housing (301), an elastic diaphragm (302), and a sealing gasket (3021). The housing (301) is connected between the front section pipe and the rear section pipe and is in communication with the front section pipe and the rear section pipe. The elastic diaphragm (302) is sealed and installed inside the housing (301) by a sealing gasket (3021), and a closed outer cavity (304) is formed between the elastic diaphragm (302) and the inner wall of the housing (301).

5. The lithium liquid transfer device for an electrodialysis and ion exchange system according to claim 4, characterized in that, Part of the inner wall of the housing (301) and the elastic diaphragm (302) form the inner cavity (303) of the voltage regulator tube (3), and the inner cavity (303) is connected to the main output tube (2).

6. The lithium liquid transfer device for an electrodialysis and ion exchange system according to claim 4, characterized in that, The elastic diaphragm (302) is sealed and installed on the inner wall of the openings at both ends of the housing (301) by two sealing gaskets (3021), and the sealing gaskets (3021) are fixedly connected to the inner wall of the openings at both ends of the housing (301) by bolts. The elastic diaphragm (302) forms the inner cavity (303) of the voltage regulator tube (3), and the inner cavity (303) is connected to the main output tube (2); the inner cavity (303) and the outer cavity (304) are coaxially sleeved.

7. The lithium liquid transfer device for an electrodialysis and ion exchange system according to claim 6, characterized in that, Both ends of the housing (301) are mounted on the main output pipe (2) via flanges. The diameter of the housing (301) is larger than the diameter of the main output pipe (2), and the diameter of the inner cavity (303) is the same as the diameter of the main output pipe (2).

8. A lithium liquid transfer device for an electrodialysis and ion exchange system according to any one of claims 4 to 7, characterized in that, The outer cavity (304) is filled with hydraulic oil.

9. A lithium liquid transfer device for an electrodialysis and ion exchange system according to claim 1, characterized in that, A grid plate (4) is installed on the inner wall of the main output pipe (2) near the inlet of the AC system by means of a clamp. The grid plate (4) is composed of multiple hexagonal grids (401) welded in a honeycomb pattern. The thickness of the grid plate (4) is 10-20mm.

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