A novel nanofiltration membrane separation and purification device

Abstract

The utility model provides a novel nanofiltration membrane separation and purification device belongs to seawater treatment technical field, this novel nanofiltration membrane separation and purification device includes the purified water storage tank, the separation cylinder is fixedly connected in the upper end of purified water storage tank, the purification mechanism, the purification mechanism includes pure water overflow cylinder, pure water overflow hole, polyamide nanofiltration membrane, rotating rod sleeve, agitating rotating rod, discharge auger, flexible scraper and separation support plate, and the separation support plate is fixedly connected in the circumference inner wall of separation cylinder, and the pure water overflow cylinder is fixedly connected in the upper end of separation support plate, and the pure water overflow hole is opened in the circumference inner wall of pure water overflow cylinder, and the polyamide nanofiltration membrane is fixedly connected in the circumference inner wall of pure water overflow cylinder, while realizing seawater efficient filtration, has the function of automatic cleaning nanofiltration membrane inner wall, effectively prevents membrane pollution and block, thereby keeps higher membrane flux and separation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of seawater treatment technology, specifically relating to a novel nanofiltration membrane separation and purification device. Background Technology

[0002] In existing technologies, seawater desalination refers to the removal of salt and other impurities from seawater through physical, chemical, or biological methods to produce freshwater suitable for human drinking and industrial use. High pressure is used to force seawater through a semi-permeable membrane, allowing water molecules to pass through while blocking most dissolved salts and other impurities. This is one of the most widely used seawater desalination technologies due to its relatively low energy consumption and high desalination rate.

[0003] Authorized publication number "CN222841658U" discloses a high-efficiency separation and purification device, including a separation tank, which is fixedly installed on the upper surface of a purification tank. A support is fixedly connected to the inner wall of the purification tank, and a mounting shell is fixedly connected to the end of the support away from the purification tank. A mounting seat is mounted inside the mounting shell via bearings. A disc is fixedly connected to the upper surface of the mounting seat, and a limiting frame is fixedly connected to the upper surface of the disc. A locking block is inserted into the limiting frame and fixedly connected to the outer surface of a filter cartridge. In this high-efficiency separation and purification device, the operator directly pours the solution into the filter cartridge. Under the action of a servo motor, the disc rotates, and the filter cartridge also rotates, which throws out the solution inside the filter cartridge and the solution inside the filter residue, reducing the solution content in the filter residue. Furthermore, during the rotation of the filter cartridge, a scraper can scrape off the solution from the inner wall of the separation tank, increasing the utilization rate of the solution.

[0004] In the aforementioned novel system, the scraper can scrape the solution off the inner wall of the separation tank during the rotation of the filter cylinder, thus increasing the utilization rate of the solution. However, when dealing with the impurities left after seawater purification, it is necessary to manually remove the impurities from the device. During continuous seawater purification, the purification process needs to be paused to clean the impurities from the device, which will affect the seawater purification efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a novel nanofiltration membrane separation and purification device, which aims to solve the problem in the prior art that it is necessary to manually remove impurities from the device and to temporarily stop the purification process to clean impurities during continuous seawater purification, which affects the seawater purification efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel nanofiltration membrane separation and purification device includes:

[0008] Purified water storage tank;

[0009] A separation cylinder, which is fixedly connected to the upper end of a purified water storage tank;

[0010] The purification mechanism includes a pure water overflow cylinder, a pure water overflow hole, a polyamide nanofiltration membrane, a rotating rod sleeve, a stirring rotating rod, a discharge auger, a flexible scraper, and a separation support plate. The separation support plate is fixedly connected to the inner circumferential wall of the separation cylinder. The pure water overflow cylinder is fixedly connected to the upper end of the separation support plate. The pure water overflow hole is opened on the inner circumferential wall of the pure water overflow cylinder. The polyamide nanofiltration membrane is fixedly connected to the inner circumferential wall of the pure water overflow cylinder. The rotating rod sleeve is fixedly connected to the inner circumferential wall of the polyamide nanofiltration membrane. The stirring rotating rod is rotatably connected inside the rotating rod sleeve. The lower end of the stirring rotating rod is connected to a drive mechanism. The discharge auger is fixedly connected to the circumferential surface of the stirring rotating rod. The flexible scraper is fixedly connected to the outer surface of the discharge auger and contacts the inner wall of the polyamide nanofiltration membrane.

[0011] In a preferred embodiment of this utility model, the purified water storage tank is provided with an auger support groove, an auger support plate is rotatably connected in the auger support groove, the lower end of the stirring rod is fixed to the auger support plate, the lower end of the separation support plate is fixedly connected to a motor sleeve, a drive motor is fixedly connected in the motor sleeve, and the auger support plate is fixed to the output end of the drive motor.

[0012] As a preferred embodiment of this utility model, the upper end of the separation support plate is provided with a drainage hole.

[0013] As a preferred embodiment of this utility model, a waste collection plate is fixedly connected to the upper end of the pure water overflow cylinder, a water outlet is opened at the upper end of the waste collection plate, and two discharge nanofiltration membranes are provided at the upper end of the waste collection plate, both of which are semi-circular.

[0014] As a preferred embodiment of this utility model, a water pipe fixing block is fixedly connected to one side end of the rotating rod sleeve, and a seawater injection pipe is fixedly connected inside the water pipe fixing block. The output port of the seawater injection pipe is located at the upper end of the pure water overflow cylinder.

[0015] As a preferred embodiment of this utility model, the purified water storage tank is provided with a water outlet flange on one side, and the water outlet flange is connected to an external drain pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. In this solution, the device integrates a rotating structure of discharge auger and flexible scraper to achieve efficient seawater filtration while automatically cleaning the inner wall of the nanofiltration membrane, effectively preventing membrane fouling and clogging, thereby maintaining high membrane flux and separation efficiency.

[0018] 2. In this solution, the flexible scraper continuously scrapes away impurities such as salt and organic matter adhering to the inner wall of the polyamide nanofiltration membrane, effectively preventing membrane fouling and clogging. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a three-dimensional structural view of the present invention;

[0021] Figure 2 This is a cross-sectional view of the structure in this utility model;

[0022] Figure 3 This is an exploded cross-sectional view of the structure in this utility model;

[0023] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This utility model Figure 3 Enlarged view of point B in the middle;

[0025] Figure 6 This utility model Figure 3 Enlarged view of point C in the middle.

[0026] In the diagram: 1. Purified water storage tank; 2. Separation cylinder; 3. Pure water overflow cylinder; 4. Pure water overflow hole; 5. Polyamide nanofiltration membrane; 6. Rotary rod sleeve; 7. Stirring rod; 8. Discharge auger; 9. Flexible scraper; 10. Separation support plate; 11. Auger support groove; 12. Auger support plate; 13. Motor sleeve; 14. Drive motor; 15. Water drop hole; 16. Waste collection plate; 17. Water outlet; 18. Discharge nanofiltration membrane; 19. Water pipe fixing block; 20. Seawater injection pipe; 21. Water outlet flange. Detailed Implementation

[0027] 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.

[0028] Example

[0029] Please see Figures 1-6 The present invention provides the following technical solution:

[0030] A novel nanofiltration membrane separation and purification device includes:

[0031] Purified water storage tank 1;

[0032] Separation cylinder 2 is fixedly connected to the upper end of the purified water storage tank 1;

[0033] The purification mechanism includes a pure water overflow cylinder 3, a pure water overflow hole 4, a polyamide nanofiltration membrane 5, a rotating rod sleeve 6, a stirring rotating rod 7, a discharge auger 8, a flexible scraper 9, and a separation support plate 10. The separation support plate 10 is fixedly connected to the inner circumference of the separation cylinder 2. The pure water overflow cylinder 3 is fixedly connected to the upper end of the separation support plate 10. The pure water overflow hole 4 is opened on the inner circumference of the pure water overflow cylinder 3. The polyamide nanofiltration membrane 5 is fixedly connected to the inner circumference of the pure water overflow cylinder 3. The rotating rod sleeve 6 is fixedly connected to the inner circumference of the polyamide nanofiltration membrane 5. The stirring rotating rod 7 is rotatably connected inside the rotating rod sleeve 6. The lower end of the stirring rotating rod 7 is connected to the drive mechanism. The discharge auger 8 is fixedly connected to the circumference of the stirring rotating rod 7. The flexible scraper 9 is fixedly connected to the outer surface of the discharge auger 8 and contacts the inner wall of the polyamide nanofiltration membrane 5.

[0034] In a specific embodiment of this utility model, a pure water overflow cylinder 3 is vertically installed on the upper end of a separation support plate 10. Multiple pure water overflow holes 4 are provided on its inner circumference wall for introducing pure water that has passed through the nanofiltration membrane into a purified water storage tank 1 for collection. A polyamide nanofiltration membrane 5 tightly wraps around and is fixed to the inner surface of the pure water overflow cylinder 3. As the core filtration material, it can effectively remove organic matter, some salt, and microorganisms from seawater. A rotating rod sleeve 6 is fixedly connected to the inner side of the polyamide nanofiltration membrane 5. A stirring rotating rod 7 is rotatably connected inside the rotating rod sleeve 6, and its lower end is connected to a drive mechanism to achieve rotational movement. A discharge auger 8 is fitted onto the outside of the stirring rotating rod 7 and rotates with it. A flexible scraper 9 is fixedly connected to the outside of the discharge auger 8 and closely adheres to the polyamide nanofiltration membrane. The inner wall of the polyamide nanofiltration membrane 5 is used to remove pollutants that may be deposited on the inner surface of the membrane, prevent clogging, and increase flux. When the device is running, the seawater to be treated enters the separation cylinder 2 from the top and flows into the pure water overflow cylinder 3 area. Under the centrifugal force generated by the rotation of the discharge auger 8, the pure water passes through the polyamide nanofiltration membrane 5 and enters the purified water storage tank 1 through the pure water overflow hole 4 to complete the collection process. Large molecular organic matter, salts and other impurities that cannot pass through the membrane layer are trapped on the inner side of the membrane. As the stirring rod 7 drives the discharge auger 8 to rotate at high speed, these impurities are pushed upward by the discharge auger 8 and transported to the waste collection area. The flexible scraper 9 continuously scrapes the inner wall of the nanofiltration membrane during the rotation process to keep the membrane surface clean, thereby extending the service life of the membrane and maintaining the efficient operation of the system.

[0035] Please refer to the details. Figures 1-6The purified water storage tank 1 is provided with an auger support groove 11. An auger support plate 12 is rotatably connected in the auger support groove 11. The lower end of the stirring rod 7 is fixed to the auger support plate 12. The lower end of the separation support plate 10 is fixedly connected to the motor sleeve 13. A drive motor 14 is fixedly connected in the motor sleeve 13. The auger support plate 12 is fixed to the output end of the drive motor 14.

[0036] In this embodiment: the lower end of the stirring rod 7 is fixedly connected to the auger support plate 12 to form a rigid transmission structure. A motor sleeve 13 is provided below the separation support plate 10. This motor sleeve 13 is made of high-strength engineering plastic, and its internal space is used to install the drive motor 14. The drive motor 14 is firmly fixed inside the motor sleeve 13 by bolts, and its output axis extends upward and is fixedly connected to the auger support plate 12. Thus, the drive motor 14 can directly drive the auger support plate 12 to rotate the stirring rod 7 as a whole. When the device is started, the drive motor 14 is energized. The output shaft drives the auger support plate 12 to rotate synchronously, which in turn drives the stirring rod 7 and the discharge auger 8 to rotate at high speed. Under the action of centrifugal force, the pure water in the seawater is quickly pushed to the surface of the polyamide nanofiltration membrane 5 and passes through the membrane layer into the pure water overflow cylinder 3. Finally, it flows into the purified water storage tank 1 through the pure water overflow hole 4 for storage. At the same time, the impurities trapped on the inner side of the membrane are continuously transported upward by the discharge auger 8 and discharged to the waste collection area. The flexible scraper 9 rotates with the discharge auger 8 and continuously scrapes the inner wall of the polyamide nanofiltration membrane 5, effectively preventing pollutant deposition and improving the membrane's antifouling ability.

[0037] Please refer to the details. Figures 1-6 A drain hole 15 is provided at the upper end of the separation support plate 10.

[0038] In this embodiment, the drainage holes 15 are evenly distributed along the plane of the separation support plate 10. The size of the holes is optimized according to the actual water volume and flow rate to ensure that the water can pass through smoothly without affecting the overall structural strength.

[0039] Please refer to the details. Figures 1-6 The upper end of the pure water overflow cylinder 3 is fixedly connected to a waste collection plate 16. The upper end of the waste collection plate 16 is provided with a drain outlet 17. The upper end of the waste collection plate 16 is provided with two discharge nanofiltration membranes 18, both of which are semi-circular.

[0040] In this embodiment: a drain outlet 17 is provided at the upper center of the waste collection plate 16. The drain outlet 17 serves as a return channel, allowing some of the liquid that has not been completely separated to fall back into the pure water overflow cylinder 3 for secondary or multiple circulation filtration treatment, thereby improving the overall purification effect. In addition, two discharge nanofiltration membranes 18 are provided on the upper surface of the waste collection plate 16. These two discharge nanofiltration membranes 18 are symmetrically distributed and have a semi-circular shape. After splicing, they can form an approximately complete circular filter surface, which is convenient for installation and replacement.

[0041] Please refer to the details. Figures 1-6 A water pipe fixing block 19 is fixedly connected to one side of the rotating sleeve 6. A seawater injection pipe 20 is fixedly connected inside the water pipe fixing block 19. The outlet of the seawater injection pipe 20 is located at the upper end of the pure water overflow cylinder 3.

[0042] In this embodiment: to achieve stable injection and uniform distribution of seawater, a water pipe fixing block 19 is provided on one side of the rotating rod sleeve 6. The water pipe fixing block 19 is firmly fixed to the outer wall of the rotating rod sleeve 6 by welding, bolting or integral molding. As a key component for supporting and positioning the seawater injection pipe 20, the water pipe fixing block 19 has an embedded channel inside, which is used to securely install the seawater injection pipe 20 therein and ensure its accurate position and good sealing.

[0043] Please refer to the details. Figures 1-6 The purified water storage tank 1 is provided with an outlet flange 21 on one side, which is connected to an external drain pipe.

[0044] In this embodiment, the outlet flange 21 is connected to the side wall of the purified water storage tank 1 by welding or bolting and communicates with its internal space, so that the pure water filtered by the polyamide nanofiltration membrane 5 can be smoothly discharged from the purified water storage tank 1. The outlet flange 21 is further connected to the external drain pipe or subsequent transportation system by flange connection to realize the continuous output and centralized transportation of the treated pure water. Sealing gaskets or flange sealant can be added at the connection as needed to ensure the sealing performance of the system and prevent leakage.

[0045] The working principle and usage process of this utility model are as follows: The pure water overflow cylinder 3 is vertically installed on the upper end of the separation support plate 10. Multiple pure water overflow holes 4 are opened on its inner circumference wall to guide the pure water that has passed through the nanofiltration membrane into the purified water storage tank 1 for collection. The polyamide nanofiltration membrane 5 tightly wraps around and is fixed to the inner surface of the pure water overflow cylinder 3. As the core filtration material, it can effectively remove organic matter, some salt, and microorganisms from seawater. The rotating rod sleeve 6 is fixedly connected to the inner side of the polyamide nanofiltration membrane 5. The stirring rotating rod 7 is rotatably connected to the inside of the rotating rod sleeve 6, and its lower end is connected to the drive mechanism to achieve rotational movement. The discharge auger 8 is fitted outside the stirring rotating rod 7 and rotates with it. The flexible scraper 9 is fixedly connected to the outer side of the discharge auger 8 and closely adheres to the polyamide nanofiltration membrane 5. The inner wall of the amide nanofiltration membrane 5 is used to remove pollutants that may be deposited on the inner surface of the membrane, prevent clogging, and increase flux. When the device is running, the seawater to be treated enters the separation cylinder 2 from the top and flows into the pure water overflow cylinder 3 area. Under the centrifugal force generated by the rotation of the discharge auger 8, the pure water passes through the polyamide nanofiltration membrane 5 and enters the purified water storage tank 1 through the pure water overflow hole 4 to complete the collection process. Large molecular organic matter, salts and other impurities that cannot pass through the membrane layer are trapped on the inner side of the membrane. As the stirring rod 7 drives the discharge auger 8 to rotate at high speed, these impurities are pushed upward by the discharge auger 8 and transported to the waste collection area. The flexible scraper 9 continuously scrapes the inner wall of the nanofiltration membrane during the rotation process to keep the membrane surface clean, thereby extending the service life of the membrane and maintaining the efficient operation of the system.

[0046] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel nanofiltration membrane separation and purification device, characterized in that: include: Purified water storage tank (1); Separation cylinder (2), which is fixedly connected to the upper end of the purified water storage tank (1); The purification mechanism includes a pure water overflow cylinder (3), a pure water overflow hole (4), a polyamide nanofiltration membrane (5), a rotating rod sleeve (6), a stirring rotating rod (7), a discharge auger (8), a flexible scraper (9), and a separation support plate (10). The separation support plate (10) is fixedly connected to the inner circumferential wall of the separation cylinder (2), the pure water overflow cylinder (3) is fixedly connected to the upper end of the separation support plate (10), and the pure water overflow hole (4) is opened on the inner circumferential wall of the pure water overflow cylinder (3). Amide nanofiltration membrane (5) is fixedly connected to the inner circumference of pure water overflow cylinder (3). Rotating rod sleeve (6) is fixedly connected to the inner circumference of polyamide nanofiltration membrane (5). Stirring rod (7) is rotatably connected inside rotating rod sleeve (6). The lower end of stirring rod (7) is connected to driving mechanism. Discharge auger (8) is fixedly connected to the circumference of stirring rod (7). Flexible scraper (9) is fixedly connected to the outer surface of discharge auger (8) and contacts the inner wall of polyamide nanofiltration membrane (5).

2. The novel nanofiltration membrane separation and purification device according to claim 1, characterized in that: The purified water storage tank (1) is provided with a screw conveyor support groove (11), and a screw conveyor support plate (12) is rotatably connected in the screw conveyor support groove (11). The lower end of the stirring rod (7) is fixed to the screw conveyor support plate (12). The lower end of the separation support plate (10) is fixedly connected to a motor sleeve (13), and a drive motor (14) is fixedly connected in the motor sleeve (13). The output end of the screw conveyor support plate (12) is fixed to the output end of the drive motor (14).

3. The novel nanofiltration membrane separation and purification device according to claim 2, characterized in that: The upper end of the separation support plate (10) is provided with a drainage hole (15).

4. The novel nanofiltration membrane separation and purification device according to claim 3, characterized in that: The upper end of the pure water overflow cylinder (3) is fixedly connected to a waste collection plate (16), and the upper end of the waste collection plate (16) is provided with a drain outlet (17). The upper end of the waste collection plate (16) is provided with two discharge nanofiltration membranes (18), and both discharge nanofiltration membranes (18) are semi-circular.

5. The novel nanofiltration membrane separation and purification device according to claim 4, characterized in that: A water pipe fixing block (19) is fixedly connected to one side end of the rotating sleeve (6), and a seawater injection pipe (20) is fixedly connected inside the water pipe fixing block (19). The outlet of the seawater injection pipe (20) is located at the upper end of the pure water overflow cylinder (3).

6. The novel nanofiltration membrane separation and purification device according to claim 5, characterized in that: The purified water storage tank (1) is provided with a water outlet flange (21) on one side, and the water outlet flange (21) is connected to an external drain pipe.

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