Reverse osmosis membrane filter

Abstract

A reverse osmosis membrane filter belongs to the technical field of filters. Comprising an integrated shell structure which is provided with a structure for integrating a PP filter layer, a reverse osmosis membrane assembly and a carbon rod into a single cylinder; the reverse osmosis membrane assembly comprises a membrane, a concentrated water net, flow guide cloth and sealing glue, and the membrane is divided through the sealing glue after being folded; the concentrated water net is arranged in the membrane and is adhered to the membrane through sealing glue to form a raw water channel A; the flow guide cloth is arranged outside the membrane and is adhered to the membrane through the sealing adhesive to form a pure water channel B; the raw water channel A and the pure water channel B are of a double-layer waterway isolation structure; a central pipe is arranged outside the carbon rod and is communicated with the pure water channel B, and pure water enters the carbon rod through the central pipe for post-filtration. According to the invention, complete separation of raw water and pure water is realized through a four-layer composite structure; the circuitous channel design prolongs the contact time of raw water and the membrane, the recovery rate reaches 70%, and the double-inlet design ensures uniform distribution of water flow.

Description

Technical Field

[0001] This invention belongs to the field of filter technology, and particularly relates to a reverse osmosis membrane filter. Background Technology

[0002] Reverse osmosis membrane technology is one of the key technologies widely used in water purification. Reverse osmosis membrane filters utilize a 0.0001μm reverse osmosis membrane to filter heavy metals, sodium, and various pathogens. Because the raw water moves laterally relative to the reverse osmosis membrane, the residence time between the raw water and the membrane surface is short, resulting in a low volume of filtered water and a recovery rate of only 30%-50%. Furthermore, in common designs, the PP filter layer, reverse osmosis membrane, and post-activated carbon filter are often separate structures, which occupy a large space, are complex to install, and have high costs.

[0003] Therefore, there is an urgent need for a reverse osmosis membrane filter to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a reverse osmosis membrane filter to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a reverse osmosis membrane filter, comprising an integrated shell structure, which has a structure that integrates a PP filter layer, a reverse osmosis membrane assembly and a carbon rod into a single cylinder; A reverse osmosis membrane module includes a membrane sheet, a concentrate mesh, a flow guide cloth, and a sealing adhesive. The membrane sheet is folded in half and separated by the sealing adhesive. The concentrate mesh is disposed inside the membrane sheet and is bonded to the membrane sheet by the sealing adhesive to form a raw water channel A. The flow guide cloth is disposed outside the membrane sheet and is bonded to the membrane sheet by the sealing adhesive to form a pure water channel B. The raw water channel A and the pure water channel B are a double-layer waterway isolation structure; A central tube is provided outside the carbon rod, which is connected to the pure water channel B. Pure water enters the carbon rod through the central tube for post-filtration.

[0006] The contact surface between the diaphragm and the concentrate mesh is the raw water side, and the contact surface between the diaphragm and the guide cloth is the pure water side; after the diaphragm is folded in half, the folded side is bonded to the central tube.

[0007] The raw water channel A is a meandering channel located on the raw water side of the membrane. After the raw water enters the raw water side of the membrane, part of it flows out along the raw water channel A, and part of it passes through the membrane surface and enters the pure water side and flows out along the pure water channel B.

[0008] The membrane 31 on the raw water side has a first long side on the raw water side located at the bottom, a second long side on the raw water side located at the top, a first short side on the raw water side located on the right, and a second short side on the raw water side located on the left. Part of the raw water enters from the first short side on the raw water side, and part of the raw water enters from the second long side on the raw water side, and both flow out from the first long side on the raw water side near the second short side.

[0009] The pure water channel B is located on the pure water side of the membrane. The three sides of the guide cloth are bonded to the membrane with sealing adhesive to divide the water path and block the water flow. The side near the central tube is open, and the pure water filtered through the membrane enters the central tube.

[0010] The membrane on the pure water side has a first long side on the lower pure water side, a second long side on the upper pure water side, a first short side on the right side of the pure water side, and a second short side on the left side of the pure water side. Pure water flows into the central tube from the second short side of the pure water side, and flows out after being filtered by the carbon rod.

[0011] The integrated housing structure includes a top cover, a PP filter layer, a reverse osmosis membrane assembly, a central tube, a base, a carbon rod top cover, a carbon rod, and a carbon rod base. The reverse osmosis membrane assembly is wrapped around the central tube, and the reverse osmosis membrane is wrapped with a PP filter layer. The top cover and the base are respectively installed at both ends of the PP filter layer. The carbon rod is placed inside the central tube, and the carbon rod top cover and the carbon rod base are installed at both ends of the carbon rod.

[0012] The length of the long side of the membrane on the raw water side is 2-3 times the length of the short side.

[0013] The length of the long side of the membrane on the pure water side is 3-5 times the length of the short side.

[0014] The raw water inflow ratio is 70% on the first short side of the raw water side and 30% on the second long side of the raw water side.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves complete separation of raw water and pure water through a four-layer composite structure consisting of a membrane, a concentrate mesh, a flow guide cloth, and a sealing adhesive; the meandering channel design extends the contact time between the raw water and the membrane, achieving a recovery rate of 70%; and the dual-inlet design ensures uniform water flow distribution.

[0016] The membrane's dual-sided functional partition design of this invention enables efficient separation, which improves the membrane's anti-fouling ability and extends its service life. This invention integrates multiple horizontally arranged filter units into a vertically stacked integrated structure through an innovative three-dimensional layout. The full utilization of the internal space of the central tube improves space utilization, making it particularly suitable for space-constrained applications. At the same time, the integrated design simplifies the installation process from connecting multiple components to assembling a single component, reducing installation time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a reverse osmosis membrane filter; Figure 2 This is a schematic diagram of the internal structure of the reverse osmosis membrane module of the present invention; Figure 3 This is a schematic diagram of the water flow channel on the original water side; Figure 4 This is a schematic diagram of the pure water flow channel. In the diagram: 1. Top cover; 2. PP filter layer; 3. Reverse osmosis membrane module; 31. Membrane sheet; 32. Concentrate mesh; 321. First long side of raw water side; 322. First short side of raw water side; 323. Second long side of raw water side; 324. Second short side of raw water side; 33. Flow guide cloth; 331. First long side of pure water side; 332. First short side of pure water side; 333. Second long side of pure water side; 334. Second short side of pure water side; 34. Sealing adhesive; 4. Central tube; 5. Base; 6. Carbon rod extension rod; 7. Carbon rod top cover; 8. Carbon rod; 9. Carbon rod base. Detailed Implementation

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

[0019] To address this technical problem, the present invention provides a technical solution: a reverse osmosis membrane filter, comprising an integrated housing structure that integrates a PP filter layer 2, a reverse osmosis membrane assembly 3, and a carbon rod 8 into a single filter element structure. The PP filter layer 2 is located on the outermost layer for pre-filtration, the reverse osmosis membrane assembly 3 surrounds the central tube 4, and the carbon rod 8 is placed inside the central tube 4 for post-filtration. This integrated structure greatly improves space utilization.

[0020] Specifically, during operation, raw water enters from the outside of the PP filter layer 2, passes through the PP filter layer 2 to the reverse osmosis membrane module 3, and then to the carbon rod 8 for filtration. Wastewater and pure water are separated, and the pure water finally flows out after being purified by the carbon rod 8.

[0021] Specifically, the integrated housing structure includes a top cover 1, a PP filter layer 2, a reverse osmosis membrane assembly 3, a central tube 4, a base 5, a carbon rod top cover 7, a carbon rod 8, and a carbon rod base 9; the reverse osmosis membrane assembly 3 is wrapped around the central tube 4, and the central tube 4 serves as the core support structure, with the reverse osmosis membrane assembly 3 tightly wrapped around its exterior to form the first layer of filtration unit.

[0022] Specifically, the PP filter layer 2 and the carbon rod 8 are common filter materials on the market that can achieve the technical effect of this invention.

[0023] Specifically, the PP filter layer 2 is wrapped around the outside of the reverse osmosis membrane module 3: the PP filter layer 2 serves as a pre-filtration unit, directly wrapping around the outside of the reverse osmosis membrane module 3 to form a second filtration barrier. This design allows the raw water to undergo preliminary filtration first through the PP filter layer 2, removing larger particulate impurities, effectively protecting the internal reverse osmosis membrane module 3, and extending its service life.

[0024] Specifically, the top cover 1 and the base 5 are respectively installed at both ends of the PP filter layer 2: the top cover 1 and the base 5 are fixed at both ends of the PP filter layer 2 by a sealed connection to form a complete shell sealing structure, ensuring that the water flows in the system according to the predetermined channel and preventing leakage and short circuit.

[0025] Specifically, the carbon rod 8 is set inside the central tube 4. As a post-filter unit, the carbon rod 8 is directly set inside the central tube 4, making full use of the internal space of the central tube 4 and realizing the three-dimensional utilization of the internal space of the filter element.

[0026] Specifically, the carbon rod cover 7 and the carbon rod base 9 are installed at both ends of the carbon rod 8. The carbon rod cover 7 and the carbon rod base 9 are fixed to both ends of the carbon rod 8 by a sealing connection, forming an independent post-filter unit sealing structure.

[0027] Traditional reverse osmosis membrane filters typically employ a separate design, with PP filtration, reverse osmosis membrane filtration, and post-activated carbon filtration as three independent units. These require external piping connections, resulting in significant space consumption, complex installation, and a high risk of leakage. This invention, through an integrated design, combines the three filtration units into a single cylindrical body, significantly simplifying the structure and installation process, and resolving the problems of loose structure and complex installation. The integrated design simplifies the installation process from connecting multiple components to assembling a single component, reducing installation time by over 60% and lowering the risk of malfunctions due to improper connections. Furthermore, it reduces the use of external connecting pipes and multiple independent housings, lowering material costs by over 25%, while also simplifying the manufacturing process and improving production efficiency.

[0028] Meanwhile, common designs often feature a cylindrical cavity as the outer shell, resulting in insufficient utilization of the internal space. This invention innovatively utilizes the internal space of the central tube 4 to house a carbon rod post-filter unit, achieving three-dimensional utilization of the filter element's internal space. This provides a larger filtration area within the same external dimensions, solving the problem of low space utilization. Through a three-dimensional layout, multiple horizontally arranged filter units are integrated into a vertically stacked integrated structure, increasing space utilization by over 40%, making it particularly suitable for space-constrained applications.

[0029] The sealing connection between the top cover 1, base 5, and PP filter layer 2, as well as the sealing connection between the carbon rod top cover 7, carbon rod base 9, and carbon rod 8, forms a multi-layer sealing structure. This ensures that the water flows strictly along the predetermined channel, preventing short-circuiting and leakage. The multi-layer sealing structure and integrated design effectively prevent leakage and short-circuiting, significantly improving system reliability and extending service life by more than 30%.

[0030] The multi-layered sealed structure allows water to flow evenly through each filter layer, avoiding the uneven water distribution problem that may occur in common designs, resulting in a more stable and reliable filtration effect.

[0031] The reverse osmosis membrane module 3 is a four-layer composite structure, including a membrane sheet 31, a concentrate mesh 32, a flow guide cloth 33, and a sealing adhesive 34. The membrane sheet 31 is folded in half and then separated by the sealing adhesive 34. The concentrate mesh 32 is disposed inside the membrane sheet 31, and the flow guide cloth 33 is disposed outside the membrane sheet 31. A complete filtration unit is formed by precisely assembling and bonding the membrane sheet 31, the concentrate mesh 32, and the flow guide cloth 33.

[0032] The membrane 31 has a folded structure, with the folded side directly bonded to the central tube 4 to form a stable basic support structure. The membrane 31 is made of a reverse osmosis membrane with a pore size of 0.0001μm, which can effectively filter heavy metals, sodium ions, and various pathogens, thereby achieving the filtration effect.

[0033] Furthermore, the contact surface between the diaphragm 31 and the concentrate mesh 32 is the raw water side, and the contact surface between the diaphragm 31 and the guide cloth 33 is the pure water side.

[0034] The membrane 31 in this invention has a unique double-sided design, achieving efficient separation through dual-sided functional partitioning. The two sides of the membrane 31 contact components with different functions, forming a raw water side and a pure water side with differentiated characteristics.

[0035] Specifically, the raw water side is used to directly face the unfiltered raw water; the pure water side is used to collect and guide the filtered pure water.

[0036] Furthermore, to increase the contact between the raw water and the feed water side, the surface of the membrane 31 can be designed with micron-level uneven texture, effectively increasing the membrane surface area by approximately 40% and providing more contact points for the raw water. During operation, the micro-texture on the feed water side makes it less likely for contaminants to accumulate on the feed water side.

[0037] The concentrate mesh 32 is disposed between the folded membranes 31 and is adhered to the membranes 31 by sealing adhesive 34 to form the raw water channel A. The concentrate mesh 32 has a dense mesh structure, which can disperse the water flow and form a stable water channel. The mesh density of the concentrate mesh 32 is 80-100 mesh, which can ensure smooth water flow and provide sufficient mechanical support.

[0038] Specifically, the sealing adhesive 34 is used to bond the long sides of both sides of the concentrated water mesh 32 to the membrane 31 to divide the water channel, so that the raw water enters the membrane 31 from the short side at the end and the long side on one side, and flows out from the long side on the other side after passing through the membrane 31 to form the raw water channel A. The raw water channel A is a water channel located on the raw water side.

[0039] The flow guide cloth 33 is located outside the folded diaphragm 31. It is bonded to the diaphragm 31 on three sides by the sealing adhesive 34, leaving only the short side near the center 4 tube open, thus forming the pure water channel B, which is a water channel located on the pure water side.

[0040] Specifically, the guide cloth 33 is made of a material with a mesh structure, which has good drainage performance.

[0041] Furthermore, the surface of the flow guiding cloth 33 may be provided with a V-shaped flow guiding groove with a groove depth of 0.1-0.2mm and a groove width of 0.3-0.5mm, which can effectively collect the pure water permeating from the surface of the membrane 31 and guide the pure water to the central tube 4.

[0042] Meanwhile, the surface of the flow guide cloth 33 is subjected to plasma treatment to form a microporous structure, ensuring unobstructed water flow.

[0043] The guide cloth 33 and the concentrate net 32 ​​are symmetrically distributed and located on both sides of the membrane 31. They are physically isolated by sealing adhesive, so that the raw water channel A and the pure water channel B on both sides can be separated from each other.

[0044] Furthermore, the flow guide cloth 33 is placed on the outside of the folded diaphragm 31. When pure water passes through, it buffers the pressure fluctuations on the pure water side, keeps the pressure difference on both sides of the diaphragm 31 stable, and prevents pressure shocks from damaging the diaphragm 31.

[0045] During operation, after the raw water enters the raw water side of membrane 31, part of it flows out along the raw water channel A, and part of it passes through the surface of membrane 31 and enters the pure water side and flows out along the pure water channel B. When the raw water adopts a common inlet flow rate of 3L / min, the flow rate of the raw water from the raw water side is about 0.9L / min, and the flow rate of the raw water from the raw water side through the surface of membrane 31 into the pure water side is about 2.1L / min. The pure water recovery rate of the reverse osmosis membrane filter of the present invention can reach 70%.

[0046] The membrane 31 has a long side and a short side on the raw water side, or when unfolded, the length of the long side is 2-3 times the length of the short side.

[0047] The membrane 31 on the raw water side has a first long side 321 on the lower side, a second long side 323 on the upper side, a first short side 322 on the right side, and a second short side 324 on the left side; part of the raw water enters from the first short side 322 and part of the raw water enters from the second long side 323, and both flow out from the first long side 321 near the second short side.

[0048] When the sealing adhesive 34 is adhered to the second long side 323 of the raw water side, the sealing adhesive 34 has a broken structure, with the side closer to the central pipe 4 being the longer end and the side farther from the central pipe 4 being the shorter end, thus forming a secondary inlet on the raw water side of the second long side 323.

[0049] The membrane 31 on the raw water side forms a four-sided structure. The first long side 321 on the raw water side serves as the main water outlet side and is arranged parallel to the second long side 323 on the raw water side. The sealing adhesive 34 on the first long side 321 on the raw water side has a disconnected structure on the side near the central tube 4, forming the raw water outlet.

[0050] The first short side 322 on the raw water side serves as the main water inlet on the raw water side, handling 70% of the raw water intake and forming the main inlet on the raw water side.

[0051] The second short side 324 on the raw water side and the sealing adhesive 34 cooperate to form a channel guide. 70% of the raw water flows out from the part of the first long side 321 on the raw water side near the second short side 324 on the raw water side after passing through the entire membrane 31, that is, the raw water side outlet flows out; 30% of the raw water enters the membrane 31 from the secondary inlet on the raw water side between the second long side 323 on the raw water side, passes through the membrane 31 and flows out from the part of the first long side 321 on the raw water side near the second short side 324 on the raw water side.

[0052] The secondary inlet on the raw water side is located close to the first short side 322 on the raw water side, so that the raw water entering from between the first short side 322 and the first long side 321 on the raw water side can form a Z-shaped meandering channel design. This structure optimizes the path of the raw water and achieves efficient contact between the raw water and the surface of the membrane 31.

[0053] The combined use of the main inlet and the secondary inlet on the raw water side forms a multi-layered, meandering channel structure. Common reverse osmosis membranes have a straight raw water channel, resulting in a short contact time between the raw water and the membrane 31, and a recovery rate of only 30%-50%. The Z-shaped meandering channel of this invention extends the contact time to 2.5 times that of the traditional design, increasing the recovery rate to 70%.

[0054] Meanwhile, the dual-inlet design and precise channel size control ensure that the water flow is evenly distributed on the surface of the diaphragm 31, avoiding excessively high or low local flow velocities.

[0055] The membrane 31 has a long side and a short side on the pure water side, or when unfolded, the length of the long side is 3-5 times the length of the short side.

[0056] The membrane 31 on the pure water side has a first long side 331 on the lower side, a second long side 333 on the upper side, a first short side 332 on the right side, and a second short side 334 on the left side. Pure water flows into the central pipe 4 from the second short side 334, and flows out after being filtered by the carbon rod 8, forming a seamless water treatment chain. The integrated setting of pure water collection, diversion, and post-filtration avoids secondary pollution.

[0057] The membrane 31 on the pure water side forms a four-sided structure. The first long side 331 on the pure water side is located on the lower side of the membrane 31 and serves as the main support side. The second long side 333 on the pure water side is located on the upper side of the membrane 31 and is arranged parallel and symmetrically with the first long side 331 on the pure water side, with the same length.

[0058] The first short side 332 on the pure water side cooperates with the sealing adhesive 34 to form a sealed boundary; the second short side 334 on the pure water side serves as the pure water outlet and is directly connected to the central pipe 4.

[0059] The reverse osmosis membrane filter of the present invention adopts a three-stage filtration system, and achieves a highly efficient and stable water treatment process through an integrated structure and optimized water flow path.

[0060] Raw water first enters the filter from the outside of PP filter layer 2. PP filter layer 2 acts as the first-stage filtration barrier, removing larger particulate impurities in the water, intercepting visible pollutants such as suspended solids and silt, and protecting the internal reverse osmosis membrane components from damage by large particulate matter.

[0061] The pre-filtered water flows into the reverse osmosis membrane module 3. 70% of the raw water enters from the first short side 322 on the raw water side, and 30% enters from the second long side 323 on the raw water side, forming a Z-shaped meandering flow on the raw water side of the membrane 31, which significantly prolongs the contact time between the raw water and the membrane 31. The pure water that permeates through the membrane 31 enters the pure water side and is collected and guided by the flow guide cloth 33. The pure water flows into the central pipe 4 from the second short side 334 on the pure water side, ready for post-filtration. The concentrated water that does not permeate flows out of the system along the raw water channel from the first long side 321 on the raw water side near the second short side, effectively preventing the accumulation of pollutants on the membrane surface.

[0062] After entering the central pipe 4, the pure water flows through the carbon rod 8 for final purification, adsorbing residual chlorine and organic pollutants, removing odors, improving taste, adjusting the pH value of the water, and ensuring that the water meets the standards for direct drinking.

[0063] The entire filtration process is a continuous operation, producing high-quality pure water without interruption.

[0064] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reverse osmosis membrane filter, characterized by, The integrated shell structure has the structure of integrating the PP filter layer (2), the reverse osmosis membrane assembly (3) and the carbon rod (8) in a single cylinder. The reverse osmosis membrane assembly (3) comprises a membrane sheet (31), a concentrated water net (32), a flow guide cloth (33) and sealing glue (34), the membrane sheet (31) is folded and is divided by the sealing glue (34), the concentrated water net (32) is arranged inside the membrane sheet (31) and is adhered to the membrane sheet (31) by the sealing glue (34) to form a raw water channel A, and the flow guide cloth (33) is arranged outside the membrane sheet (31) and is adhered to the membrane sheet (31) by the sealing glue (34) to form a pure water channel B. The raw water channel A and the pure water channel B are double-layer water channel isolation structures. The carbon rod (8) is externally provided with a center pipe (4) which is communicated with the pure water channel B, and pure water enters the carbon rod (8) through the center pipe (4) for post-filtering.

2. A reverse osmosis membrane filter according to claim 1, wherein: The contact surface of the membrane sheet (31) and the concentrated water net (32) is the raw water side, the contact surface of the membrane sheet (31) and the flow guide cloth (33) is the pure water side, and the membrane sheet (31) is adhered to the center pipe (4) after being folded.

3. A reverse osmosis membrane filter according to claim 1, wherein: The raw water channel A is a detour channel located on the raw water side of the membrane sheet (31), raw water enters the raw water side of the membrane sheet (31), part of the raw water flows out along the raw water channel A, and part of the raw water passes through the surface of the membrane sheet (31) to enter the pure water side and flows out along the pure water channel B.

4. The reverse osmosis membrane filter of claim 1, wherein: The membrane sheet (31) on the raw water side has a first long side (321) on the lower side, a second long side (323) on the upper side, a first short side (322) on the right side and a second short side (324) on the left side, part of the raw water enters from the first short side (322), and part of the raw water enters from the second long side (323), and both of them flow out from the first long side (321) close to the second short side.

5. The reverse osmosis membrane filter of claim 1, wherein: The membrane sheet (31) on the pure water side is located on the pure water side of the membrane sheet (31), the flow guide cloth (33) is adhered to the membrane sheet (31) by the sealing glue (34) to divide the water channel and block the water flow, the side close to the center pipe (4) is open, and the pure water filtered through the membrane sheet (31) enters the center pipe (4).

6. A reverse osmosis membrane filter according to claim 1, wherein: The pure water channel B has a first long side (331) on the lower side, a second long side (333) on the upper side, a first short side (332) on the right side and a second short side (334) on the left side, pure water flows into the center pipe (4) from the second short side (334), and flows out after being filtered by the carbon rod (8).

7. The reverse osmosis membrane filter of claim 1, wherein: The integrated shell structure comprises an upper cover (1), a PP filter layer (2), a reverse osmosis membrane assembly (3), a center pipe (4), a base (5), a carbon rod upper cover (7), a carbon rod (8) and a carbon rod base (9), the reverse osmosis membrane assembly (3) is wrapped outside the center pipe (4), the reverse osmosis membrane assembly (3) is wrapped outside by the PP filter layer (2), the two ends of the PP filter layer (2) are respectively provided with the upper cover (1) and the base (5), and the carbon rod (8) is arranged inside the center pipe (4), and the two ends of the carbon rod (8) are provided with the carbon rod upper cover (7) and the carbon rod base (9).

8. A reverse osmosis membrane filter according to claim 2, wherein: The long side length of the membrane sheet (31) on the raw water side is 2-3 times the short side length.

9. A reverse osmosis membrane filter according to claim 2, wherein: The long side length of the membrane sheet (31) on the pure water side is 3-5 times the short side length.

10. The reverse osmosis membrane filter of claim 4, wherein: The raw water entering proportion of the raw water side first short side (322) is 70%, and the raw water entering proportion of the raw water side second long side (323) is 30%.

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