A high conversion spiral reverse osmosis membrane assembly
By designing a highly transformed rolled reverse osmosis membrane module, the water barrier assembly and negative pressure mechanism are used to enhance the flow of raw water, and the reverse osmosis membrane is activated through the heating net in a low-temperature environment, the problem of the decline in water production after the filtration time of the reverse osmosis membrane module in the prior art is solved, and the penetration effect in the low-temperature environment is poor, achieving efficient water separation and improving water production efficiency.
Patent Information
- Application Number
- CN202421510643.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing reverse osmosis membrane modules are prone to concentration polarization after the filtration time is extended, resulting in a decrease in water production and poor penetration effect in low-temperature environments.
A high-conversion roll-type reverse osmosis membrane module is designed. By setting water inlet and outlet areas at both ends of the outer cylinder, and using a water barrier assembly and a negative pressure mechanism, the raw water circulation and concentrated water exchange rate are enhanced, the concentration difference polarization phenomenon is alleviated, and the reverse osmosis membrane is activated through the heating network in a low-temperature environment to improve the permeability efficiency.
It effectively reduces the concentration polarization phenomenon of reverse osmosis membrane modules, improves water production efficiency, and maintains a large water production volume under low temperature environments.
Smart Images
Figure CN222724044U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reverse osmosis membrane components, in particular to a high-conversion rolled reverse osmosis membrane component. Background Art
[0002] The reverse osmosis membrane assembly generally includes a central tube with a water hole and a plurality of reverse osmosis units wound on the central tube, and the reverse osmosis units are connected to the holes on the central tube. The gaps between the reverse osmosis units wound on the central tube form a raw water channel, and a water inlet and a water outlet are respectively provided at both ends of the raw water channel. When the reverse osmosis membrane assembly is used, the water to be treated first enters the raw water channel from the inlet of the raw water channel, and then under the action of water pressure, the pure water enters the reverse osmosis unit and then enters the central tube. The solutes in the tap water are trapped in the raw water channel by the reverse osmosis membrane bag. Finally, the concentrated water in the raw water channel flows out through the outlet of the raw water channel.
[0003] However, as the filtration time increases, the solution in the raw water channel will form a concentration gradient, causing the concentration of the solution in the raw water channel to gradually increase as it approaches the reverse osmosis membrane bag. This phenomenon is called concentration polarization, which will cause the water production of the reverse osmosis membrane assembly to drop sharply. In addition, since the reverse osmosis unit is wound densely on the central tube, it is difficult for the concentrated water in some areas to be quickly discharged, resulting in the reverse osmosis membrane assembly After a long period of filtration, the concentration polarization phenomenon is usually more serious, affecting the water production efficiency.
[0004] Moreover, water purification equipment needs to separate dissolved salts, colloids, microorganisms, and organic matter in water through reverse osmosis membranes. However, in actual use, existing reverse osmosis membrane equipment often has poor osmosis effect due to low temperature. Utility Model Content
[0005] The main purpose of the utility model is to provide a high-conversion rolled reverse osmosis membrane assembly, aiming to strengthen the circulation of raw water inside the reverse osmosis membrane assembly, increase the exchange rate between raw water and concentrated water, and enable the reverse osmosis membrane assembly to maintain a large water production in a low temperature environment.
[0006] To achieve the above-mentioned purpose, the utility model proposes a high-conversion rolled reverse osmosis membrane assembly, including an outer cylinder and a central tube provided with multiple holes and multiple reverse osmosis units wrapped around the outer circumference of the central tube, an upper cover plate and a lower cover plate are respectively provided at both ends of the outer cylinder, a water inlet area is provided on one side of the upper cover plate close to the central tube, a water retaining assembly is provided on the upper cover plate outside the water inlet area to seal the side of the reverse osmosis unit wrapped around the central tube, a water outlet area is provided on the lower cover plate away from the central tube, the water retaining assembly is provided on the lower cover plate outside the water outlet area, the upper cover plate is provided with a raw water inlet in the water inlet area, and the lower cover plate is provided with a raw water outlet in the water outlet area.
[0007] In one embodiment of the utility model, the water retaining assembly includes a plurality of concentric annular baffles with the central tube as the central axis. When the upper cover plate and the lower cover plate are respectively installed at both ends of the outer tube, the annular baffles are inserted into the reverse osmosis unit wrapped around the central tube.
[0008] In one embodiment of the present invention, the central tube is connected to a negative pressure mechanism for forming a negative pressure inside the reverse osmosis unit.
[0009] In one embodiment of the utility model, the negative pressure mechanism includes a rotating rod arranged inside the central tube and a blade spirally arranged around the rotating rod, and one end of the rotating rod is drivingly connected to a driving structure.
[0010] In one embodiment of the utility model, the reverse osmosis unit includes two reverse osmosis membranes stacked together and a water production grid sandwiched between the two reverse osmosis membranes, a heating grid is provided in the water production grid, and a water inlet grid is connected to the side of the reverse osmosis membrane facing away from the water production grid. When the reverse osmosis unit is connected to the central tube and wound around the central tube, the water production grid is aligned with the holes of the central tube.
[0011] In one embodiment of the utility model, the central tube is provided with a slot, the hole is provided in the slot, a connecting strip is connected to one side of the reverse osmosis unit, the connecting strip is provided with a plurality of through holes at the place where it is connected to the water production grid, the connecting strip is embedded in the slot and the through holes are aligned with the holes.
[0012] In one embodiment of the present invention, the lower cover is provided with an electrical socket.
[0013] In one embodiment of the utility model, a one-way valve is installed on the raw water inlet, and a pressure valve is installed at the raw water outlet.
[0014] The technical solution of the utility model is to set a water inlet area near the central tube on the upper cover plate, and set a water retaining assembly outside the water inlet area, so that raw water can only flow into the reverse osmosis unit from the water inlet area. In addition, a water retaining assembly is also provided on the lower cover plate, so that the raw water entering the reverse osmosis unit can only flow outward in a spiral to the water outlet area outside the lower cover plate, so as to avoid the phenomenon of dead water in some areas of the raw water, which affects the water production efficiency. In addition, the extension of the raw water channel increases the pressure of the raw water on the reverse osmosis membrane and increases the flow rate of the raw water, thereby reducing the concentration polarization phenomenon of the reverse osmosis membrane assembly and increasing the overall water production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0016] Figure 1 It is a cross-sectional view of an embodiment of a high-conversion spiral reverse osmosis membrane assembly of the utility model;
[0017] Figure 2 It is a structural schematic diagram of an embodiment of a high-conversion spiral reverse osmosis membrane assembly of the utility model;
[0018] Figure 3 This is a schematic structural diagram of a reverse osmosis unit of an embodiment of a high-conversion spiral reverse osmosis membrane assembly of the utility model;
[0019] Figure 4 This is a large-scale diagram of the reverse osmosis unit A of an embodiment of a high-conversion spiral reverse osmosis membrane assembly of the utility model;
[0020] Figure 5 This is a schematic structural diagram of a central tube in one embodiment of a high-conversion rolled reverse osmosis membrane assembly of the utility model.
[0021] Description of Figure Numbers:
[0022] 1. Outer cylinder; 2. Central tube; 3. Reverse osmosis unit; 4. Upper cover plate; 5. Lower cover plate; 6. Negative pressure mechanism; 21. Holes; 22. Slots; 31. Connecting strips; 32. Through holes; 33. Reverse osmosis membrane; 34. Water production grid; 35. Heating grid; 26. Water inlet grid; 41. Water inlet area; 42. Water retaining assembly; 43. One-way valve; 51. Water outlet area; 61. Rotating rod; 62. Paddles; 63. Driving structure.
[0023] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0025] The utility model provides a high-conversion rolled reverse osmosis membrane component.
[0026] In the embodiment of the present utility model, a high conversion spiral reverse osmosis membrane 33 component, such as Figure 1 to Figure 2 As shown, it includes an outer cylinder 1 and a central tube 2 with a plurality of holes 21 and a plurality of reverse osmosis units 3 wound around the outer periphery of the central tube 2. The reverse osmosis unit 3 is mainly composed of a plurality of reverse osmosis membranes 33, a water production grid 34 and a water inlet grid 26 stacked on each other. The water production grid 34 is arranged between two reverse osmosis membranes 33 for allowing the production water to pass through and for supporting the reverse osmosis membranes 33. The water inlet grid 26 is arranged on the side of the reverse osmosis membrane 33 away from the water production grid 34 for allowing the raw water to enter and exit. An upper cover plate 4 and a lower cover plate 5 are respectively arranged at both ends of the outer cylinder 1. In order to realize the raw water from the curled The raw water enters the center of the reverse osmosis unit 3 and flows out from the outside, so that the raw water channel is extended, the pressure of the raw water on the reverse osmosis membrane 33 is increased, the flow rate of the raw water is increased, and the ability of the raw water to carry away the concentrated water is strengthened without leaving dead corners, thereby reducing the concentration polarization phenomenon of the reverse osmosis membrane 33 assembly. A water inlet area 41 is provided on one side of the upper cover plate 4 near the central tube 2. The water inlet area 41 is composed of a closed annular baffle. When the upper cover plate 4 is installed on the outer cylinder 1, the annular baffle is inserted into the reverse osmosis unit 3, so that the raw water can only enter the water inlet partition of the reverse osmosis unit 3 from the water inlet area 41, and the upper cover The plate 4 is provided with a water retaining assembly 42 outside the water inlet area 41 to seal the side of the reverse osmosis unit 3 wound around the central tube 2. The water retaining assembly 42 includes a sealing block and a plurality of protrusions arranged on the sealing block. The protrusions can be inserted into the gap of the reverse osmosis unit 3 for sealing. At the same time, the lower cover plate 5 is provided with a water outlet area 51 away from the central tube 2. The structure of the water outlet area 51 is similar to that of the water inlet area 41, and the lower cover plate 5 is also provided with a water retaining assembly 42 outside the water outlet area 51. At the same time, the upper cover plate 4 is provided with a raw water inlet in the water inlet area 41, and the lower cover plate 5 is provided with a raw water outlet in the water outlet area 51. Water inlet, so that raw water can enter the water inlet area 41 from the water inlet, and then flow into the water inlet grid 26 of the reverse osmosis unit 3 at the water inlet area 41, and then rotate along the curling direction of the reverse osmosis unit 3 through the water inlet grid 26 to the outside of the reverse osmosis unit 3, and flow out from the water outlet area 51. In this process, the raw water brings out the concentrated water at any position of the reverse osmosis unit 3 to avoid the dead water phenomenon in some areas of the raw water, which affects the water production efficiency. In addition, this structure improves the flow rate and water pressure of the raw water on the water inlet grid 26 to a certain extent, thereby increasing the overall water production efficiency.
[0027] Preferably, the water retaining assembly 42 includes a plurality of concentric annular baffles with the central tube 2 as the central axis. When the upper cover plate 4 and the lower cover plate 5 are respectively installed at both ends of the outer tube 1, the annular baffles are inserted into the reverse osmosis unit 3 wrapped around the central tube 2. The annular baffles can divide the reverse osmosis unit 3 into multiple areas, allowing the raw water to flow within the area, avoiding the flow of raw water being affected by excessive resistance.
[0028] Alternatively, if Figure 2As shown, the central tube 2 is connected to a negative pressure mechanism 6 for forming a negative pressure inside the reverse osmosis unit 3. The negative pressure mechanism 6 may be composed of an air pump to extract the air and pure water in the central tube 2, reduce the pressure inside the reverse osmosis unit 3, thereby increasing the reverse osmosis efficiency and the water production efficiency.
[0029] Furthermore, the negative pressure mechanism 6 includes a rotating rod 61 arranged inside the central tube 2 and a paddle 62 spirally arranged on the circumference of the rotating rod 61. One end of the rotating rod 61 is driven and connected to a driving structure 63. The driving structure 63 can be composed of a coil and a magnet. The magnet is arranged at one end of the rotating rod, and the coil is arranged outside the central tube 2. When the coil is energized, the driving magnet rotates, thereby driving the rotating rod 61 to rotate. The paddle 62 of the rotating rod 61 draws pure water out of the central tube 2, thereby forming a negative pressure inside the central tube 2.
[0030] Optionally, since the exchange efficiency of the reverse osmosis membrane 33 is low under low temperature conditions, resulting in low water production efficiency, in order to solve the problem of low operating efficiency of the reverse osmosis unit 3 under low temperature conditions, as Figure 3 to Figure 4 As shown, the reverse osmosis unit 3 includes two reverse osmosis membranes 33 stacked together and a water production grid 34 sandwiched between the two reverse osmosis membranes 33. A heating grid 35 is provided in the water production grid 34. The reverse osmosis membrane 33 is activated by heating through the heating grid 35. The heating grid 35 can be composed of PTC ceramics. A water inlet grid 26 is connected to the side of the reverse osmosis membrane 33 away from the water production grid 34. When the reverse osmosis unit 3 is connected to the central tube 2 and wound around the central tube 2, the water production grid 34 is aligned with the hole 21 of the central tube 2.
[0031] Furthermore, if Figures 4 to 5 As shown, due to the long-term operation of the reverse osmosis unit 3, a lot of dirt is easily adhered to the surface of the reverse osmosis membrane 33. In order to facilitate the cleaning of the reverse osmosis membrane 33 and increase the water participation efficiency, a slot 22 is provided on the central tube 2, and the hole 21 is provided in the slot 22. A snap-on strip 31 is connected to one side of the reverse osmosis unit 3. The snap-on strip 31 is provided with a plurality of through holes 32 at the connection with the water production grid 34. The snap-on strip 31 is embedded in the slot 22 and the through holes 32 are aligned with the holes 21. When cleaning is required, the reverse osmosis unit 3 can be disassembled for easy cleaning.
[0032] Optionally, an electrical socket is provided on the lower cover plate 5 to facilitate powering the heating network 35 .
[0033] Optionally, a one-way valve 43 is installed at the raw water inlet, and a pressure valve is installed at the raw water outlet, so that a high-pressure space is formed in the outer cylinder 1, further increasing the working efficiency of the reverse osmosis membrane 33.
[0034] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0035] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A high conversion spiral reverse osmosis membrane assembly, comprising an outer cylinder, a central tube with a plurality of holes, and a plurality of reverse osmosis units wound around the outer circumference of the central tube, characterized in that: An upper cover plate and a lower cover plate are respectively provided at both ends of the outer tube, a water inlet area is provided on one side of the upper cover plate close to the central tube, a water retaining assembly is provided on the upper cover plate outside the water inlet area to seal the side of the reverse osmosis unit wrapped around the central tube, a water outlet area is provided on the lower cover plate away from the central tube, the water retaining assembly is provided on the lower cover plate outside the water outlet area, a raw water inlet is provided on the upper cover plate in the water inlet area, and a raw water outlet is provided on the lower cover plate in the water outlet area.
2. A high conversion spiral reverse osmosis membrane assembly according to claim 1, characterized in that: The water retaining assembly includes a plurality of concentric annular baffles with the central tube as the central axis. When the upper cover plate and the lower cover plate are respectively mounted at both ends of the outer cylinder, the annular baffles are inserted into the reverse osmosis unit wound around the central tube.
3. A high conversion spiral reverse osmosis membrane assembly according to claim 1, characterized in that: The central tube is connected to a negative pressure mechanism for forming a negative pressure inside the reverse osmosis unit.
4. A high conversion spiral reverse osmosis membrane assembly according to claim 3, characterized in that: The negative pressure mechanism comprises a rotating rod arranged inside the central tube and a blade spirally arranged around the rotating rod. One end of the rotating rod is drivingly connected to a driving structure.
5. A high conversion spiral reverse osmosis membrane assembly according to claim 1, characterized in that: The reverse osmosis unit includes two reverse osmosis membranes stacked together and a water production grid sandwiched between the two reverse osmosis membranes. A heating grid is arranged in the water production grid. A water inlet grid is connected to the side of the reverse osmosis membrane away from the water production grid. When the reverse osmosis unit is connected to the central tube and wound around the central tube, the water production grid is aligned with the holes of the central tube.
6. A high conversion spiral reverse osmosis membrane assembly according to claim 5, characterized in that: The central tube is provided with a slot, the hole is provided in the slot, one side of the reverse osmosis unit is connected with a connecting strip, the connecting strip is provided with a plurality of through holes at the place where it is connected with the water production grid, the connecting strip is embedded in the slot and the through holes are aligned with the hole.
7. A high conversion spiral reverse osmosis membrane assembly according to claim 6, characterized in that: The lower cover plate is provided with an electrical socket.
8. A high conversion spiral wound reverse osmosis membrane assembly according to any one of claims 1 to 7, characterized in that: A one-way valve is installed on the raw water inlet, and a pressure valve is installed at the raw water outlet.