Nanofiltration membrane device for extracting lithium from salt lake

Abstract

The utility model relates to the technical field of salt lake lithium extraction, in particular to a nanofiltration membrane device for salt lake lithium extraction, which comprises a nanofiltration membrane pipeline for salt lake lithium extraction, a nanofiltration membrane pipe positioned in the nanofiltration membrane pipeline and integrated cleaning and dismounting equipment for dismounting the nanofiltration membrane pipe and cleaning the inner wall of the nanofiltration membrane pipeline, the integrated cleaning and dismounting equipment comprises a driving assembly, a guide assembly and a cleaning assembly, the guide assembly comprises a fixed bottom plate, a linear bearing, a lead screw, a linear guide column, a fixed seat and a top plate, and the driving assembly is located in the fixed seat and comprises a driving motor, a driving wheel, a driven wheel and a driving belt. The cleaning assembly comprises a cleaning shaft disc and a cleaning brush located on the circumferential wall of the outer wall of the cleaning shaft disc. According to the integrated cleaning and detaching equipment, the nanofiltration membrane pipe located in the nanofiltration membrane pipeline can be conveniently taken out and detached, the inner circumferential wall of the nanofiltration membrane pipeline is cleaned while the nanofiltration membrane pipe is taken out and detached, the cleaning and detaching functions are integrated, the structure is simple, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium extraction from salt lakes, and specifically relates to a nanofiltration membrane device for lithium extraction from salt lakes. Background Technique

[0002] Salt lake brine contains rich lithium resources, which are characterized by large resource reserves and low extraction costs. Among the globally proven lithium resources, salt lake brine accounts for 58%. China has rich salt lake resources, mainly distributed in Qinghai, Tibet and other places.

[0003] The lithium extraction technology from salt lake brine mainly separates and concentrates lithium ions from brine through methods such as evaporation, adsorption, and membrane separation, and finally prepares products such as lithium carbonate; membrane technologies such as nanofiltration and electrodialysis are used to achieve efficient separation of lithium and impurities. These methods have the advantages of simple operation and environmental friendliness, and are especially suitable for treating salt lake brines with a high magnesium-lithium ratio.

[0004] After the reverse osmosis membrane core of the nanofiltration membrane device for lithium extraction from salt lakes is used for a period of time, it needs to be replaced. The replacement steps are as follows: after the equipment stops running, remove the flexible pipe joints at both ends of the membrane housing, use a hex wrench to remove the screws of the membrane housing baffle, pull out the membrane plug end cover by manpower, and after the end cover is pulled out, use pliers to pull out the reverse osmosis membrane inside the pipe. However, in the actual replacement process, it is difficult to remove and disassemble the reverse osmosis membrane from the pipe. Due to the attachment of substances such as scale on the inner wall of the pipe, it is difficult to remove and disassemble the reverse osmosis membrane, and the inner wall of the pipe needs to be cleaned before replacing the new reverse osmosis membrane, which is inconvenient to clean. Content of the Utility Model

[0005] The purpose of the utility model is to provide a nanofiltration membrane device for lithium extraction from salt lakes to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A nanofiltration membrane device for extracting lithium from salt lakes, comprising a nanofiltration membrane pipeline for extracting lithium from salt lakes, a nanofiltration membrane tube located inside the nanofiltration membrane pipeline, and an integrated cleaning and disassembly device for disassembling the nanofiltration membrane tube to clean the inner wall of the nanofiltration membrane pipeline. The integrated cleaning and disassembly device includes a driving component, a guiding component, and a cleaning component. The guiding component includes a fixed bottom plate, a linear bearing, a lead screw, linear guiding columns, a fixed seat, and a top plate. The driving component is located inside the fixed seat. The bottom of the lead screw is vertically installed on the top of the fixed bottom plate through a bearing. There are three linear guiding columns in total, and the three linear guiding columns are evenly and parallelly distributed on the outer circumference of the lead screw on the fixed bottom plate. The linear bearing is installed on the lead screw. The top of the lead screw passes through the top of the fixed seat and is connected to the bottom of the top plate. Each linear guiding column passes through the top of the fixed seat and is connected to the bottom of the top plate through a bearing sleeve.

[0008] As a preferred solution of the present utility model, the driving component includes a driving motor, a driving wheel, a driven wheel, and a driving belt. The driven wheel is sleeved on the outer circumferential wall of the linear bearing. The driving motor is located inside the fixed seat on one side of the driven wheel. The output end of the driving motor is connected to the driving wheel. The driving wheel and the driven wheel are connected through the driving belt.

[0009] As a preferred solution of the present utility model, the cleaning component includes a cleaning shaft disc. The cleaning shaft disc is installed on the bottom of the top plate near the outer circumferential wall. Cleaning brushes are arranged on the outer circumferential wall of the cleaning shaft disc.

[0010] As a preferred solution of the present utility model, a flange for sleeving on the outer circumferential wall of the end of the nanofiltration membrane pipeline is arranged on the circumferential wall of the top of the fixed seat.

[0011] As a preferred solution of the present utility model, the diameter of the top plate is smaller than the inner diameter of the inner wall of the nanofiltration membrane pipeline.

[0012] As a preferred solution of the present utility model, the outer circumferential wall of the cleaning shaft disc abuts against the inner circumferential wall of the nanofiltration membrane pipeline.

[0013] As a preferred solution of the present utility model, the linear guiding columns are of a hollow structure. One end of the bottom of each linear guiding column is connected to an external water supply pipeline. Water outlets are arranged on the outer wall of each linear guiding column near one end of the cleaning shaft disc.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] In view of the problems raised in the background art, the present application provides an integrated cleaning and disassembly device, which facilitates the removal and disassembly of the nanofiltration membrane tube located inside the nanofiltration membrane pipeline. While removing and disassembling, it cleans the inner circumferential wall of the nanofiltration membrane pipeline, integrating the functions of cleaning and disassembly. It not only has a simple structure but also is convenient to operate, improving the maintenance efficiency, reducing the operation difficulty, and playing an important role in maintaining the normal operation of the system;

[0016] When removing and disassembling the nanofiltration membrane tube inside the nanofiltration membrane pipeline, remove the union pipelines at both ends of the nanofiltration membrane pipeline, pull out the membrane plug end cover, place the integrated cleaning and disassembly device horizontally, insert the cleaning shaft disc into the port, fasten the flange on the fixed seat to the outer circumferential wall of the end of the nanofiltration membrane pipeline, start the driving motor, and connect the driving wheel on the output end of the driving motor to the driven wheel on the outer circumferential wall of the linear bearing through the driving belt. Drive the screw rod to perform a linear rotational displacement through the rotation of the linear bearing. While the screw rod rotates and displaces, drive the cleaning shaft disc and the cleaning brush to clean the inner wall of the nanofiltration membrane pipeline. The top plate at the end of the screw rod pushes the nanofiltration membrane tube to displace towards one side of the nanofiltration membrane pipeline by the driving force of the screw rod displacement, and take out the nanofiltration membrane tube from inside the nanofiltration membrane pipeline, then just remove the nanofiltration membrane tube. The screw rod drives the fixed bottom plate and the linear guiding column to displace simultaneously. The linear guiding column is connected to the external water supply pipeline, and water flows out through the outer wall of the end of the linear guiding column close to the cleaning shaft disc to wash the inner wall of the nanofiltration membrane pipeline;

[0017] Simplify the process of removing and disassembling the nanofiltration membrane tube from the nanofiltration membrane pipeline, and synchronously clean the inner wall of the nanofiltration membrane pipeline. Adopt an integrated design, integrating the functions of cleaning and disassembly. It not only has a simple structure but also is convenient to operate. While removing and disassembling the nanofiltration membrane tube, it can effectively clean the inner circumferential wall of the pipeline, ensure the cleanliness of the pipeline, improve the maintenance efficiency, reduce the operation difficulty, and play an important role in maintaining the normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall nanofiltration membrane pipeline inspection drawing of the present utility model;

[0019] Figure 2 It is the axonometric drawing of the overall integrated cleaning and disassembly device of the present utility model;

[0020] Figure 3 It is the structural schematic diagram of the driving component of the present utility model;

[0021] Figure 4 It is the structural schematic diagram of the guiding component and the cleaning component of the present utility model.

[0022] In the figure: 1. Nanofiltration membrane pipeline; 2. Nanofiltration membrane tube; 3. Integrated cleaning and disassembly device; 31. Driving component; 312. Driving motor; 313. Driving wheel; 314. Driven wheel; 315. Driving belt; 32. Guiding component; 321. Fixed bottom plate; 322. Linear bearing; 323. Lead screw; 324. Linear guiding column; 325. Fixed seat; 3251. Flange; 326. Top plate; 33. Cleaning component; 331. Cleaning shaft disc; 332. Cleaning brush. Detailed implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention.

[0024] Embodiment

[0025] Please refer to Figures 1-4, the present utility model provides a technical solution: a nanofiltration membrane device for extracting lithium from salt lakes, including a nanofiltration membrane pipeline 1 for extracting lithium from salt lakes, a nanofiltration membrane tube 2 located inside the nanofiltration membrane pipeline 1, and an integrated cleaning and disassembly device 3 for disassembling the nanofiltration membrane tube 2 and cleaning the inner wall of the nanofiltration membrane pipeline 1. The integrated cleaning and disassembly device 3 includes a driving component 31, a guiding component 32, and a cleaning component 33. The guiding component 32 includes a fixed bottom plate 321, a linear bearing 322, a lead screw 323, linear guiding columns 324, a fixed seat 325, and a top plate 326. The driving component 31 is located inside the fixed seat 325. A flange 3251 for sleeving on the outer circumferential wall of the end of the nanofiltration membrane pipeline 1 is provided on the circumferential wall of the top of the fixed seat 325. During cleaning, the flange 3251 on the fixed seat 325 is buckled on the outer circumferential wall of the end of the nanofiltration membrane pipeline 1. Starting the driving motor 312 is simple in operation and saves manpower. The bottom of the lead screw 323 is vertically installed on the top of the fixed bottom plate 321 through a bearing. A total of three linear guiding columns 324 are provided, and the three linear guiding columns 324 are evenly and parallelly distributed on the outer circumference of the lead screw 323 and the fixed bottom plate 321. The linear guiding columns 324 are of a hollow structure. One end of the bottom of each linear guiding column 324 is connected to an external water supply pipeline. An outlet is provided on the outer wall of each linear guiding column 324 near one end of the cleaning shaft disc 331. The linear guiding columns 324 with a hollow structure, on the one hand, conduct linear guiding to ensure that the lead screw 323 drives the top plate 326 and the cleaning component 33 to perform linear movement. On the other hand, they are connected to the external water supply pipeline, facilitating flushing of the nanofiltration membrane pipeline 1. The linear bearing 322 is installed on the lead screw 323. The top of the lead screw 323 penetrates through the top of the fixed seat 325 and is connected to the bottom of the top plate 326. Each linear guiding column 324 is connected to the bottom of the top plate 326 through a bearing sleeve penetrating through the top of the fixed seat 325. The driving component 31 includes a driving motor 312, a driving wheel 313, a driven wheel 314, and a driving belt 315. The driven wheel 314 is sleeved on the outer circumferential wall of the linear bearing 322. The driving motor 312 is located inside the fixed seat 325 on one side of the driven wheel 314. The output end of the driving motor 312 is connected to the driving wheel 313. The driving wheel 313 and the driven wheel 314 are connected through the driving belt 315.

[0026] It should be noted that in this embodiment, the linear guiding columns 324 with a hollow structure, on the one hand, conduct linear guiding to ensure that the lead screw 323 drives the top plate 326 and the cleaning component 33 to perform linear movement. On the other hand, they are connected to the external water supply pipeline, facilitating flushing of the nanofiltration membrane pipeline 1 and improving the cleaning efficiency of the nanofiltration membrane pipeline 1 in cooperation with the cleaning component 33;

[0027] Furthermore, the present application provides an integrated cleaning and disassembly device 3, which facilitates the removal and disassembly of the nanofiltration membrane tube 2 located inside the nanofiltration membrane pipeline 1. While removing and disassembling, it cleans the inner circumferential wall of the nanofiltration membrane pipeline 1, integrating the functions of cleaning and disassembly. It not only has a simple structure but also is convenient to operate, improving the maintenance efficiency, reducing the operation difficulty, and playing an important role in maintaining the normal operation of the system.

[0028] Furthermore, when removing and disassembling the nanofiltration membrane tube 2 inside the nanofiltration membrane pipeline 1, remove the union pipelines at both ends of the nanofiltration membrane pipeline 1, pull out the membrane plug end cover, horizontally place the integrated cleaning and disassembly device 3, insert the cleaning shaft disc 331 into the port, fasten the flange 3251 on the fixed seat 325 to the outer circumferential wall of the end of the nanofiltration membrane pipeline 1, start the driving motor 312, and connect the driving wheel 313 on the output end of the driving motor 312 to the driven wheel 314 on the outer circumferential wall of the linear bearing 322 through the driving belt 315. Drive the lead screw 323 to perform a linear rotational displacement through the rotation of the linear bearing 322. The top plate 326 at the end of the lead screw 323 pushes the nanofiltration membrane tube 2 to displace towards one side of the nanofiltration membrane pipeline 1 under the driving force of the displacement of the lead screw 323, take out the nanofiltration membrane tube 2 from inside the nanofiltration membrane pipeline 1, and then remove the nanofiltration membrane tube 2, which simplifies the process of removing and disassembling the nanofiltration membrane tube 2 from the nanofiltration membrane pipeline 1, and is convenient to operate, reducing the operation difficulty.

[0029] Please refer to Figure 2 and 4 , the cleaning assembly 33 includes a cleaning shaft disc 331, and the cleaning shaft disc 331 is installed at the bottom near the outer circumferential wall of the top plate 326. Cleaning brushes 332 are arranged on the outer circumferential wall of the cleaning shaft disc 331; the diameter of the top plate 326 is smaller than the inner diameter of the nanofiltration membrane pipeline 1, and the outer circumferential wall of the cleaning shaft disc 331 abuts against the inner circumferential wall of the nanofiltration membrane pipeline 1.

[0030] It should be noted that in this embodiment, the cleaning shaft disc 331 is a smooth cleaning disc, with a uniform and scratch-free outer wall, which will not damage the inner wall of the nanofiltration membrane pipeline 1, and the cleaning brushes 332 are made of polyester fiber;

[0031] Further, when removing the nanofiltration membrane tube 2 inside the nanofiltration membrane pipeline 1, remove the union pipelines at both ends of the nanofiltration membrane pipeline 1, pull out the membrane plug end cover, place the integrated cleaning and disassembly device 3 horizontally, insert the cleaning shaft disc 331 into the port, fasten the flange 3251 on the fixed seat 325 to the outer circumferential wall of the end of the nanofiltration membrane pipeline 1, start the driving motor 312, start the external water supply pipeline. The driving wheel 313 on the output end of the driving motor 312 is connected to the driven wheel 314 on the outer circumferential wall of the linear bearing 322 through the driving belt 315. The rotation of the linear bearing 322 drives the lead screw 323 to perform a linear rotational displacement. While the lead screw 323 rotates and displaces, it drives the cleaning shaft disc 331 and the cleaning brush 332 to clean the inner wall of the nanofiltration membrane pipeline 1. The top plate 326 at the end of the lead screw 323 pushes the nanofiltration membrane tube 2 to displace towards one side of the nanofiltration membrane pipeline 1 by the driving force of the displacement of the lead screw 323, and takes out the nanofiltration membrane tube 2 from the inside of the nanofiltration membrane pipeline 1, and then remove the nanofiltration membrane tube 2. The lead screw 323 drives the fixed bottom plate 321 and the linear guide post 324 to displace simultaneously. The linear guide post 324 is connected to the external water supply pipeline, and water flows out through the outer wall of the end of the linear guide post 324 close to the cleaning shaft disc 331 to wash the inner wall of the nanofiltration membrane pipeline 1. This simplifies the process of removing and disassembling the nanofiltration membrane tube 2 from the nanofiltration membrane pipeline 1, and synchronously realizes the cleaning of the inner wall of the nanofiltration membrane pipeline 1. With an integrated design, it integrates the cleaning and disassembly functions. It not only has a simple structure but also is convenient to operate. When removing and disassembling the nanofiltration membrane tube, it can effectively clean the inner circumferential wall of the pipeline, ensure the cleanliness of the pipeline, improve the maintenance efficiency, reduce the operation difficulty, and plays an important role in maintaining the normal operation of the system.

[0032] The working process of the present utility model:

[0033] When in use, when removing and disassembling the nanofiltration membrane tube 2 inside the nanofiltration membrane pipeline 1, remove the union pipelines at both ends of the nanofiltration membrane pipeline 1, pull out the membrane plug end cover, horizontally place the integrated cleaning and disassembling device 3, insert the cleaning shaft disc 331 into the port interior, fasten the flange 3251 on the fixing seat 325 to the outer circumferential wall of the end of the nanofiltration membrane pipeline 1, start the driving motor 312, start the external water supply pipeline. The driving wheel 313 on the output end of the driving motor 312 is connected to the driven wheel 314 on the outer circumferential wall of the linear bearing 322 through the driving belt 315. Drive the lead screw 323 to perform a linear rotational displacement through the rotation of the linear bearing 322. While the lead screw 323 rotates and displaces, drive the cleaning shaft disc 331 and the cleaning brush 332 to clean the inner wall of the nanofiltration membrane pipeline 1. The top plate 326 at the end of the lead screw 323 pushes the nanofiltration membrane tube 2 to displace towards one side of the nanofiltration membrane pipeline 1 by the driving force of the displacement of the lead screw 323, take out the nanofiltration membrane tube 2 from the inside of the nanofiltration membrane pipeline 1, and just take down the nanofiltration membrane tube 2. The lead screw 323 drives the fixed bottom plate 321 and the linear guide post 324 to displace simultaneously. The linear guide post 324 is connected to the external water supply pipeline, and water flows out through the outer wall of one end of the linear guide post 324 close to the cleaning shaft disc 331 to wash the inner wall of the nanofiltration membrane pipeline 1, simplifying the operation process, improving work efficiency, and at the same time ensuring the cleanliness of the nanofiltration membrane pipeline, providing great convenience for the maintenance of the system.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nanofiltration membrane device for extracting lithium from a salt lake, comprising a nanofiltration membrane pipeline (1) for extracting lithium from a salt lake, a nanofiltration membrane tube (2) located inside the nanofiltration membrane pipeline (1), and an integrated cleaning and disassembly device (3) for disassembling the nanofiltration membrane tube (2) and cleaning the inner wall of the nanofiltration membrane pipeline (1), characterized in that: The integrated cleaning and disassembly device (3) comprises a driving assembly (31), a guiding assembly (32) and a cleaning assembly (33); the guiding assembly (32) comprises a fixed base plate (321), a linear bearing (322), a screw rod (323), a linear guide column (324), a fixed seat (325) and a top plate (326); the driving assembly (31) is located inside the fixed seat (325); the bottom of the screw rod (323) is vertically installed on the top of the fixed base plate (321) through a bearing; the linear guide column (324) is vertically installed on the top of the fixed base plate (321) and the top plate (326) is vertically installed on the bottom of the screw rod (323) through a bearing; There are three linear guide columns (324) in total. The three linear guide columns (324) are evenly distributed in parallel on the fixed base plate (321) on the outer circumference of the screw rod (323). The linear bearing (322) is installed on the screw rod (323). The top of the screw rod (323) passes through the top of the fixed seat (325) and is connected to the bottom of the top plate (326). Each linear guide column (324) passes through the top of the fixed seat (325) and is connected to the bottom of the top plate (326) through a bearing sleeve.

2. A nanofiltration membrane device for extracting lithium from a salt lake according to claim 1, characterized in that: The driving assembly (31) comprises a driving motor (312), a driving wheel (313), a driven wheel (314) and a driving belt (315); the driven wheel (314) is sleeved on the outer circumferential wall of the linear bearing (322); the driving motor (312) is located inside the fixing seat (325) on one side of the driven wheel (314); the output end of the driving motor (312) is connected to the driving wheel (313); and the driving wheel (313) and the driven wheel (314) are connected via the driving belt (315).

3. The nanofiltration membrane device for extracting lithium from a salt lake according to claim 1, characterized in that: The cleaning assembly (33) comprises a cleaning shaft disc (331), which is installed at the bottom of the top plate (326) close to the outer circumferential wall, and a cleaning brush (332) is arranged on the outer circumferential wall of the cleaning shaft disc (331).

4. A nanofiltration membrane device for extracting lithium from a salt lake according to claim 1, characterized in that: A flange (3251) is provided on the top circumferential wall of the fixing seat (325) for being sleeved on the outer circumferential wall of the end of the nanofiltration membrane pipeline (1).

5. The nanofiltration membrane device for extracting lithium from a salt lake according to claim 1, characterized in that: The diameter of the top plate (326) is smaller than the diameter of the inner wall of the nanofiltration membrane pipeline (1).

6. A nanofiltration membrane device for extracting lithium from a salt lake according to claim 3, characterized in that: The outer circumferential wall of the cleaning shaft disc (331) abuts against the inner circumferential wall of the nanofiltration membrane pipeline (1).

7. A nanofiltration membrane device for extracting lithium from a salt lake according to claim 6, characterized in that: The linear guide column (324) is a hollow structure, and one end of the bottom of each linear guide column (324) is connected to an external water supply pipeline. A water outlet is provided on the outer wall of one end of each linear guide column (324) close to the cleaning shaft disc (331).

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