Novel high-pollution-resistance reverse osmosis membrane

Abstract

The utility model discloses a novel high-pollution-resistance reverse osmosis membrane which comprises a central tube, pure water inlet holes are formed in the outer wall of the central tube at equal intervals, and polyamide composite filter membranes are arranged outside the central tube at equal intervals. A water inlet titanium alloy flow guide grid and a permeable water flow guide grid are arranged on the sides, close to each other, of the polyamide composite filter membranes respectively, the water inlet titanium alloy flow guide grid and the permeable water flow guide grid are arranged at intervals, and a super-hydrophobic coating is arranged on the outer wall of the water inlet titanium alloy flow guide grid. And nano-silver ions are arranged in the permeated water flow guide grid at equal intervals. The utility model relates to the technical field of water treatment, and solves the problems that in the prior art, a reverse osmosis membrane is easily eroded by pollutants, microorganisms and chemical substances in water in a long-time use process, so that the performance of the membrane is reduced, the flux is reduced, and the filtered water flux and the service life of the reverse osmosis membrane are influenced.

Description

A novel high-fouling-resistant reverse osmosis membrane Technical Field

[0001] This utility model relates to the field of water treatment technology, specifically to a novel high-fouling-resistant reverse osmosis membrane. Background Technology

[0002] Reverse osmosis membrane (RO membrane) is a highly efficient separation technology that utilizes the selective separation principle of a semi-permeable membrane to achieve solution desalination, purification, or concentration under pressure. It can effectively block impurities such as dissolved solids, organic matter, bacteria, and viruses, while allowing only water molecules to pass through, thereby achieving the purpose of highly efficient purification and providing users with stable and reliable water quality assurance. It is widely used in seawater desalination, pure water preparation, wastewater treatment, and many other fields such as medicine, chemical industry, and electronics. In existing technologies, reverse osmosis membranes are easily corroded by pollutants, microorganisms, and chemicals in the water during long-term use, leading to a decline in membrane performance, reduced flux, and affecting the filtration flux and service life of the reverse osmosis membrane. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a novel high-fouling-resistant reverse osmosis membrane, which solves the problem that in existing technologies, reverse osmosis membranes are easily corroded by pollutants, microorganisms, and chemicals in the water during long-term use, leading to a decline in membrane performance, reduced flux, and affecting the filtration flux and service life of the reverse osmosis membrane.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A novel high-fouling-resistant reverse osmosis membrane includes a central tube. Pure water inlet holes are equidistantly spaced on the outer wall of the central tube. Polyamide composite filter membranes are equidistantly arranged on the outer side of the central tube. A water inlet titanium alloy flow guide grid and a permeate flow guide grid are respectively arranged on the sides of the polyamide composite filter membranes that are close to each other. The water inlet titanium alloy flow guide grid and the permeate flow guide grid are spaced apart. The outer wall of the water inlet titanium alloy flow guide grid is coated with a superhydrophobic coating. The inner wall of the permeate flow guide grid... The membrane is equidistantly arranged with nano-silver ions. Both ends of the permeable water guiding grid are provided with sealing adhesive. The sealing adhesive is bonded to the outer walls of two adjacent polyamide composite filter membranes. The outer wall of the outer polyamide composite filter membrane is fitted with a shell. One end of the shell is fixedly connected to an inlet plug. The inlet plug is fitted to the central tube and the polyamide composite filter membrane respectively. Both ends of the inlet plug are provided with raw water inlet holes at equal intervals. The inside of the inlet plug is filled with silver-loaded activated carbon particles and KDF particles.

[0005] Preferably, an outlet plug is fixedly connected to the end of the outer casing away from the inlet plug, the central tube passes through the outlet plug, and concentrated water drainage holes are equidistantly provided on the outer wall of the outlet plug. A first sealing ring is provided on the outer wall of the outer casing near the inlet plug, a second sealing ring is provided on the outer walls of the inlet plug and the outlet plug, a third sealing ring is equidistantly provided on the outer wall of the central tube away from the inlet plug, and an isolation mesh is provided on both sides of the interior of the inlet plug.

[0006] Preferably, the polyamide composite filter membrane includes a polyamide separation layer, a porous support layer, and a nonwoven fabric base layer. The polyamide separation layer is disposed on the side close to the inlet titanium alloy flow guide grid, the nonwoven fabric base layer is disposed on the side close to the permeable water flow guide grid, and the porous support layer is disposed on the side where the polyamide separation layer and the nonwoven fabric base layer are close to each other.

[0007] Preferably, a limiting rod is provided inside the water inlet plug, and a sealing baffle is provided inside the central tube near the water inlet plug. The limiting rod is connected to the central tube and the sealing baffle respectively.

[0008] Preferably, a fixing rod is provided on the side of the water inlet plug away from the polyamide composite filter membrane.

[0009] This invention provides a novel high-fouling-resistant reverse osmosis membrane. It offers the following advantages: This novel high-fouling-resistant reverse osmosis membrane, through the coordination of a central tube, a pure water inlet, a polyamide composite filter membrane, a titanium alloy inlet flow guide grid, a superhydrophobic coating, a permeate flow guide grid, nano-silver ions, sealing adhesive, a casing, an inlet plug, a raw water inlet, silver-loaded activated carbon particles, and KDF particles, pre-treats the raw water using the silver-loaded activated carbon particles and KDF particles. This effectively removes residual chlorine, heavy metal ions, organic matter, and other impurities from the raw water, while inhibiting microbial growth. The use of titanium alloy as the inlet flow guide grid, with a stable superhydrophobic coating on its surface, and polypropylene as the product water flow guide grid, with nano-silver ions uniformly implanted within the permeate flow guide grid, prevents contamination and erosion of the reverse osmosis membrane by pollutants, microorganisms, and chemicals in the water. This makes it particularly suitable for harsh water quality environments, thus ensuring the water filtration performance and flux of the reverse osmosis membrane, and contributing to improved fouling resistance and service life.

[0010] By coordinating the central tube, the outer casing, the inlet plug, the first sealing ring, the second sealing ring, the third sealing ring, the isolation mesh, the outlet plug, and the concentrate drain hole, and by setting sealing structures at both ends and on the outer wall of the reverse osmosis membrane core, as well as on the outside of the outlet of the central tube, the reverse osmosis membrane core can be sealed to its fixed shell, and the outlet of the central tube can be sealed to the pipeline. This improves the overall structural stability, prevents leakage of raw water and concentrate during the reverse osmosis process, and ensures the purity of the filtered water and the working efficiency of the reverse osmosis membrane. This helps to improve the stability and service life of the reverse osmosis membrane. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the structure of this utility model;

[0012] Figure 2 is a schematic diagram of the structure of the polyamide composite filter membrane, the inlet titanium alloy flow guide grid, and the permeable water flow guide grid in this utility model.

[0013] Figure 3 is a schematic diagram of the appearance of this utility model;

[0014] Figure 4 is a cross-sectional view of the central tube, polyamide composite filter membrane and outer shell of this utility model.

[0015] Figure 5 is a magnified view of a portion of region A in Figure 1;

[0016] Figure 6 is a magnified view of region B in Figure 4.

[0017] In the diagram: 1. Central tube; 2. Pure water inlet; 3. Polyamide composite filter membrane; 4. Inlet titanium alloy flow guide grid; 5. Superhydrophobic coating; 6. Permeable water flow guide grid; 7. Nano silver ions; 8. Sealing adhesive; 9. Outer shell; 10. Inlet plug; 11. Raw water inlet; 12. Silver-loaded activated carbon particles; 13. KDF particles; 14. First sealing ring; 15. Second sealing ring; 16. Third sealing ring; 17. Isolation mesh; 18. Polyamide separation layer; 19. Porous support layer; 20. Non-woven fabric base layer; 21. Limiting rod; 22. Sealing partition; 23. Outlet plug; 24. Concentrate drain hole; 25. Fixing rod. 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] In existing technologies, reverse osmosis membranes are easily corroded by pollutants, microorganisms and chemicals in the water during long-term use, which leads to a decline in membrane performance, a reduction in flux, and affects the filtration flux and service life of the reverse osmosis membrane.

[0020] In view of this, the present invention provides a novel high-fouling-resistant reverse osmosis membrane. Through the coordination of a central tube, a pure water inlet, a polyamide composite filter membrane, a titanium alloy inlet flow guide grid, a superhydrophobic coating, a permeate flow guide grid, nano-silver ions, sealing adhesive, a casing, an inlet plug, a raw water inlet, silver-loaded activated carbon particles, and KDF particles, the raw water is pretreated by the silver-loaded activated carbon particles and KDF particles. This effectively removes residual chlorine, heavy metal ions, organic matter, and other impurities from the raw water, while simultaneously inhibiting microbial growth. The titanium alloy inlet flow guide grid is used to pretreat the raw water. A stable superhydrophobic coating is constructed on the surface of the alloy flow guide grid to improve the material corrosion resistance, structural stability, and surface anti-adhesion of the feed water flow guide grid. Polypropylene is used as the product water flow guide grid, and nano-silver ions are uniformly embedded inside the permeate flow guide grid to prevent the growth and reproduction of microorganisms on the reverse osmosis membrane, reduce the impact of microbial contamination on the reverse osmosis membrane performance, and avoid contamination and erosion of the reverse osmosis membrane by pollutants, microorganisms, and chemicals in the water. It is especially suitable for harsh water quality environments, ensuring the water filtration performance and flux of the reverse osmosis membrane, and significantly improving the anti-fouling performance and service life of the reverse osmosis membrane.

[0021] As shown in Figures 1-6, a novel high-fouling-resistant reverse osmosis membrane includes a central tube 1. Pure water inlet holes 2 are equidistantly spaced on the outer wall of the central tube 1. Polyamide composite filter membranes 3 are equidistantly arranged on the outside of the central tube 1. A water inlet titanium alloy guide grid 4 and a permeate water guide grid 6 are respectively arranged on the sides of the polyamide composite filter membranes 3 that are close to each other. The water inlet titanium alloy guide grid 4 and the permeate water guide grid 6 are spaced apart. A superhydrophobic coating 5 is provided on the outer wall of the water inlet titanium alloy guide grid 4, and nano-silver ions 7 are equidistantly arranged inside the permeate water guide grid 6. Both ends of the water guide grid 6 are provided with sealing adhesive 8, which is bonded to the outer walls of the two adjacent polyamide composite filter membranes 3. The outer wall of the outer polyamide composite filter membrane 3 is connected to a covering shell 9. One end of the covering shell 9 is fixedly connected to a water inlet plug 10. The water inlet plug 10 is connected to the central tube 1 and the polyamide composite filter membrane 3 respectively. Both ends of the water inlet plug 10 are provided with raw water inlet holes 11 at equal intervals. The inside of the water inlet plug 10 is filled with silver-loaded activated carbon particles 12 and KDF particles 13.

[0022] In the specific implementation process, it is worth noting that through the cooperation between the central tube 1, the pure water inlet hole 2, the polyamide composite filter membrane 3, the inlet titanium alloy flow guide grid 4, the permeable water flow guide grid 6, the sealing adhesive 8, and the outer shell 9, the polyamide composite filter membrane 3, the inlet titanium alloy flow guide grid 4, and the permeable water flow guide grid 6 are arranged in an orderly manner and wound together on the outside of the central tube 1. The inlet titanium alloy flow guide grid 4 and the permeable water flow guide grid 6 are spaced apart between the multiple layers of polyamide composite filter membrane 3, with the permeable water flow guide grid 6 corresponding to the pure water inlet hole 2. The polyamide composite filter membrane 3 is sealed on both sides of the permeable water flow guide grid 6 using the sealing adhesive 8, and then fixed by wrapping the outside after winding and assembly, forming a stable structure. The reverse osmosis membrane core structure enhances the membrane's pressure resistance during use, preventing structural deformation or damage due to excessive water pressure. This is achieved through the combination of the feed water titanium alloy guide grid 4 and the superhydrophobic coating 5. The feed water guide grid 4 is made of titanium alloy and treated with anodizing + fluorosilane modification or nano-composite spraying. A stable superhydrophobic coating 5 is constructed on the surface of the titanium alloy grid, significantly improving its corrosion resistance, structural stability, and surface anti-adhesion properties. This results in a significantly improved anti-fouling performance and service life of the feed water guide grid 4, making it virtually corrosion-free in seawater, high-chlorine, and high-acid / alkali environments, making it particularly suitable for harsh water quality environments. The flow-guiding effect of the titanium alloy inlet water guide grid 4 ensures that the raw water is evenly distributed on the surface of the polyamide composite filter membrane 3, improving the working efficiency of the reverse osmosis membrane. Through the cooperation between the permeate water guide grid 6 and the nano-silver ions 7, the permeate water guide grid 6, made of polypropylene with nano-silver ions 7 evenly embedded inside, effectively kills and inhibits bacteria, viruses, and other microorganisms in the water, preventing their growth and reproduction on the reverse osmosis membrane and reducing the impact of microbial contamination on the membrane's performance. The cooperation between the central tube 1, the polyamide composite filter membrane 3, the outer shell 9, the inlet plug 10, the raw water inlet hole 11, the silver-loaded activated carbon particles 12, and the KDF particles 13, along with the inlet plug... The head 10 is fixed to the inlet end of the reverse osmosis membrane core, allowing raw water to enter the interior of the reverse osmosis membrane core through the raw water inlet hole 11 of the inlet end plug 10. As the raw water is transported within the inlet end plug 10, it undergoes filtration treatment by silver-loaded activated carbon particles 12 and KDF particles 13, effectively removing residual chlorine, heavy metal ions, organic matter, and other impurities from the raw water. Simultaneously, it inhibits microbial growth, further protecting the reverse osmosis membrane and extending its service life. This is achieved through the coordination of the central tube 1, pure water inlet hole 2, polyamide composite filter membrane 3, inlet titanium alloy flow guide grid 4, superhydrophobic coating 5, permeate flow guide grid 6, nano silver ions 7, sealing adhesive 8, outer shell 9, inlet end plug 10, raw water inlet hole 11, silver-loaded activated carbon particles 12, and KDF particles 13.Pretreatment of raw water using silver-loaded activated carbon particles 12 and KDF particles 13 effectively removes impurities such as residual chlorine, heavy metal ions, and organic matter, while inhibiting microbial growth. A titanium alloy inlet flow guide grid 4 is used, with a stable superhydrophobic coating 5 constructed on its surface to improve material corrosion resistance, structural stability, and surface anti-adhesion. Polypropylene is used as the product water flow guide grid, with nano-silver ions 7 uniformly implanted within the permeate flow guide grid 6 to prevent microbial growth and reproduction on the reverse osmosis membrane, reducing the impact of microbial contamination on reverse osmosis membrane performance. This avoids contamination and erosion of the reverse osmosis membrane by pollutants, microorganisms, and chemicals in the water, making it particularly suitable for harsh water quality environments. It ensures the water filtration performance and flux of the reverse osmosis membrane, significantly improving its anti-fouling performance and service life.

[0023] Furthermore, an outlet plug 23 is fixedly connected to the end of the outer casing 9 away from the inlet plug 10. The central tube 1 passes through the outlet plug 23. Concentrate drain holes 24 are equidistantly opened on the outer wall of the outlet plug 23. A first sealing ring 14 is provided on the outer wall of the outer casing 9 near the inlet plug 10. A second sealing ring 15 is provided on the outer walls of the inlet plug 10 and the outlet plug 23. A third sealing ring 16 is equidistantly provided on the outer wall of the central tube 1 away from the inlet plug 10. Isolation nets 17 are provided on both sides of the inside of the inlet plug 10. The isolation nets 17 are used to isolate the silver-loaded activated carbon particles 12 and KDF particles 13 inside the inlet plug 10 to prevent the silver-loaded activated carbon particles 12 and KDF particles 13 from clogging the raw water inlet hole 11.

[0024] In the specific implementation process, it is worth noting that the cooperation between the central tube 1, the outer casing 9, the outlet plug 23, and the concentrate drain hole 24, and by fixing the outlet plug 23 to the outlet end of the outer casing 9, improves the overall structural stability. Simultaneously, the concentrate drain hole 24 effectively discharges the concentrate generated during the reverse osmosis process, ensuring the efficient operation of the reverse osmosis membrane. The cooperation between the central tube 1, the outer casing 9, the inlet plug 10, the first sealing ring 14, the second sealing ring 15, the third sealing ring 16, and the outlet plug 23, and the sealing performance of the reverse osmosis membrane module, effectively improves the sealing performance of the reverse osmosis membrane module and prevents leakage of raw water and concentrate during the reverse osmosis process. This is achieved through the cooperation of the central tube 1, the outer casing 9, the inlet plug 10, the first sealing ring 14, the second sealing ring 15, the third sealing ring 16, and the outlet plug 23. To prevent leakage and ensure the purity of the filtered water and the working efficiency of the reverse osmosis membrane, the isolation net 17 is used to isolate the silver-loaded activated carbon particles 12 and KDF particles 13 inside the inlet plug 10, preventing them from clogging the raw water inlet hole 11. Through the cooperation between the central tube 1, the outer shell 9, the inlet plug 10, the first sealing ring 14, the second sealing ring 15, the third sealing ring 16, the isolation net 17, the outlet plug 23, and the concentrate drain hole 24, a sealing structure is set at both ends and the outer wall of the reverse osmosis membrane core, as well as on the outside of the outlet end of the central tube 1. This seals the reverse osmosis membrane core with the membrane core's fixed shell, and between the outlet end of the central tube and the pipeline, improving the overall structural stability, preventing leakage of raw water and concentrate during the reverse osmosis process, ensuring the purity of the filtered water and the working efficiency of the reverse osmosis membrane, and improving the stability and service life of the reverse osmosis membrane.

[0025] Furthermore, the polyamide composite filter membrane 3 includes a polyamide separation layer 18, a porous support layer 19, and a non-woven fabric base layer 20. The polyamide separation layer 18 is disposed on the side close to the inlet titanium alloy guide grid 4, the non-woven fabric base layer 20 is disposed on the side close to the permeable water guide grid 6, and the porous support layer 19 is disposed on the side where the polyamide separation layer 18 and the non-woven fabric base layer 20 are close to each other.

[0026] In the specific implementation process, it is worth noting that the polyamide separation layer 18, the porous support layer 19, and the nonwoven fabric base layer 20 are combined to form a multi-layer composite structure of the polyamide composite filter membrane 3. The polyamide separation layer 18 is located on the side close to the inlet titanium alloy flow guide grid 4, and the nonwoven fabric base layer 20 is located on the side close to the permeate flow guide grid 6. The polyamide separation layer 18 adopts a dense mesh structure with a thickness of about 100-200nm and a pore size of <1nm. It selectively separates water molecules, ions, and organic matter, and can effectively block impurities and pollutants in the water. The porous support layer 19 adopts a porous structure with a thickness of about 40-50μm. It forms micropores with a pore size of 10-50nm through a phase inversion method, providing sufficient support strength for the polyamide separation layer 18 while allowing water molecules to pass through smoothly. The nonwoven fabric base layer 20 adopts a nonwoven fabric structure with a thickness of about 120-150μm, providing mechanical strength for the polyamide separation layer 18 and the porous support layer 19, and preventing the membrane from breaking under high pressure.

[0027] Furthermore, a limiting rod 21 is provided inside the water inlet plug 10, and a sealing baffle 22 is provided inside the center tube 1 near the water inlet plug 10. The limiting rod 21 is connected to the center tube 1 and the sealing baffle 22 respectively.

[0028] In the specific implementation process, it is worth noting that through the cooperation between the central tube 1, the inlet plug 10, the limiting rod 21 and the sealing baffle 22, the limiting rod 21 is inserted into the interior of the central tube 1, which improves the connection stability between the inlet plug 10 and the central tube 1 and prevents it from shifting or falling off during use. The sealing baffle 22 seals the central tube 1 at the inlet end, preventing raw water from directly entering the interior of the central tube 1 and affecting the filtration effect of the reverse osmosis membrane.

[0029] Furthermore, a fixing rod 25 is provided on the side of the inlet plug 10 away from the polyamide composite filter membrane 3. The fixing rod 25 is used to provide stable support for the reverse osmosis membrane core and ensure its stability during operation.

[0030] In the specific implementation process, it is worth noting that the fixing rod 25 is used to provide stable support for the reverse osmosis membrane core, ensuring its stability during operation and improving the convenience of installing and disassembling the water filtration module, making the maintenance of the water filtration equipment more convenient.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel high-fouling-resistant reverse osmosis membrane, comprising a central tube (1), characterized in that: The outer wall of the central tube (1) is provided with pure water inlet holes (2) at equal intervals. Polyamide composite filter membranes (3) are provided at equal intervals on the outside of the central tube (1). A water inlet titanium alloy guide grid (4) and a permeable water guide grid (6) are respectively provided on the side of the polyamide composite filter membrane (3) that are close to each other. The water inlet titanium alloy guide grid (4) and the permeable water guide grid (6) are arranged alternately. The outer wall of the water inlet titanium alloy guide grid (4) is provided with a superhydrophobic coating (5). Nano silver ions (7) are provided at equal intervals inside the permeable water guide grid (6). Both ends of the permeable water guide grid (6) are provided with There is a sealing adhesive (8), which is bonded to the outer walls of two adjacent polyamide composite filter membranes (3). The outer wall of the polyamide composite filter membrane (3) located on the outside is connected to a covering shell (9). One end of the covering shell (9) is fixedly connected to a water inlet plug (10). The water inlet plug (10) is connected to the central tube (1) and the polyamide composite filter membrane (3) respectively. Both ends of the water inlet plug (10) are provided with raw water inlet holes (11) at equal intervals. The inside of the water inlet plug (10) is filled with silver-loaded activated carbon particles (12) and KDF particles (13).

2. The novel high-fouling-resistant reverse osmosis membrane according to claim 1, characterized in that: The outer shell (9) is fixedly connected to the outlet plug (23) at the end away from the inlet plug (10). The central tube (1) passes through the outlet plug (23). The outer wall of the outlet plug (23) is provided with concentrated water drainage holes (24) at equal intervals. The outer wall of the outer shell (9) is provided with a first sealing ring (14) on the side near the inlet plug (10). The outer walls of the inlet plug (10) and the outlet plug (23) are provided with a second sealing ring (15). The outer wall of the central tube (1) is provided with a third sealing ring (16) at equal intervals at the end away from the inlet plug (10). The inner sides of the inlet plug (10) are provided with isolation nets (17).

3. The novel high-fouling-resistant reverse osmosis membrane according to claim 1, characterized in that: The polyamide composite filter membrane (3) includes a polyamide separation layer (18), a porous support layer (19), and a non-woven fabric base layer (20). The polyamide separation layer (18) is disposed on the side close to the inlet titanium alloy guide grid (4), the non-woven fabric base layer (20) is disposed on the side close to the permeable water guide grid (6), and the porous support layer (19) is disposed on the side where the polyamide separation layer (18) and the non-woven fabric base layer (20) are close to each other.

4. The novel high-fouling-resistant reverse osmosis membrane according to claim 2, characterized in that: The inlet plug (10) is provided with a limiting rod (21), and the center tube (1) is provided with a sealing partition (22) at one end near the inlet plug (10). The limiting rod (21) is connected to the center tube (1) and the sealing partition (22) respectively.

5. The novel high-fouling-resistant reverse osmosis membrane according to claim 1, characterized in that: A fixing rod (25) is provided on the side of the water inlet plug (10) away from the polyamide composite filter membrane (3).

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