A reverse osmosis membrane cartridge

Abstract

The application discloses a kind of reverse osmosis membrane filter element, it is related to reverse osmosis membrane filter element field, including shell and center tube, the outer wall of the center tube is wound with reverse osmosis membrane, the outer wall of the reverse osmosis membrane is symmetrically provided with baffle, the outer wall of the reverse osmosis membrane has fin, the top of the shell is provided with concentrated water outlet pipe and raw water inlet pipe respectively, the bottom of the reverse osmosis membrane has concentrated water tank, the inside of the concentrated water tank is slidably provided with floating plate, the outer wall of the center tube is provided with cleaning ring.The application is gradually slid down by raw water on the outer wall of fin, the contact area between raw water and reverse osmosis membrane is increased in this process, then the concentrated water in concentrated water tank is discharged from the shell through the other side fin through concentrated water outlet pipe, the contact time between raw water and reverse osmosis membrane is extended, when work is completed, floating plate will slide down, and cleaning ring will clean the precipitation crystallization on the outer wall of center tube.

Description

Technical Field

[0001] This invention relates to the field of reverse osmosis membrane filter cartridges, specifically a reverse osmosis membrane filter cartridge. Background Technology

[0002] Reverse osmosis, also known as reverse osmosis, is a membrane separation process that uses pressure difference as the driving force to separate the solvent from the solution. Pressure is applied to the feed liquid on one side of the membrane. When the pressure exceeds its osmotic pressure, the solvent will permeate in the opposite direction of natural osmosis. Existing reverse osmosis membrane filter cartridges consist of a central tube and wound reverse osmosis membrane sheets. The central tube is equipped with a pure water channel, and the spacer layers between the membrane sheets form a concentrated water channel. The surface of the central tube is designed with multiple pure water through holes distributed axially to converge into a concentrated pure water channel. Traditional reverse osmosis membrane filter cartridges all have raw water entering from one end along the axial direction and concentrated water exiting from the other end. This makes the water flow channel only the axial distance from the water inlet end to the concentrated water end. The water flow channel is relatively short, and the water utilization rate is low.

[0003] Chinese patent CN208700642 U discloses a reverse osmosis membrane filter element. A second raw water inlet is located at the bottom of the filter element's outer shell. The raw water flowing in through this inlet increases the flow rate of the raw water entering the lower inlet chamber, preventing sedimentation and crystallization on the reverse osmosis membrane due to low flow velocity. This reduces the fouling rate of the reverse osmosis membrane, extends its lifespan, and improves water utilization. Concentrate flows out from the outside of the reverse osmosis membrane and is collected at the concentrate outlet for discharge.

[0004] Because of the above structure, the raw water flows quickly to the bottom through the reverse osmosis membrane during use and is then discharged through the concentrate outlet. During this process, the raw water has less contact time and a smaller contact area with the reverse osmosis membrane, which reduces the overall permeation effect. At the same time, sediment and crystals will form in the permeate holes at the pure water outlet over a long period of time. If they are not cleaned in time, they can easily cause blockage of the permeate holes, thereby reducing the overall service life of the reverse osmosis membrane. Summary of the Invention

[0005] Based on this, the purpose of this invention is to provide a reverse osmosis membrane filter element to solve the technical problems of the short contact time and small contact area of ​​raw water on the reverse osmosis membrane, which reduces the overall permeation effect. At the same time, if the sediment and crystals at the seepage holes are not cleaned in time, it is easy to cause the seepage outlet to be blocked, thereby reducing the overall service life of the reverse osmosis membrane.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a reverse osmosis membrane filter element, comprising a shell and a central tube, wherein a reverse osmosis membrane is wound around the outer wall of the central tube, and a partition is symmetrically arranged on the outer wall of the reverse osmosis membrane, and the other end of the partition is sealed to the inner wall of the shell, and fins are symmetrically arranged on the outer wall of the reverse osmosis membrane through the partition, and the fins are inclined downward, a concentrate outlet pipe and a raw water inlet pipe are respectively arranged on the top of the shell, a concentrate tank is installed at the bottom of the reverse osmosis membrane at the fins, a float is slidably arranged inside the concentrate tank, and a support rod is connected to the top of the float, and an array of cleaning rings is slidably arranged on the outer wall of the central tube, and the cleaning rings are connected to the support rod.

[0007] By adopting the above technical solution, when the raw water enters the shell through the raw water inlet pipe, the raw water gradually slides downward on the outer wall of the fins. This process increases the contact area between the raw water and the reverse osmosis membrane. Furthermore, because the fins are inclined downward, the flow rate of the incoming raw water is accelerated, effectively reducing the phenomenon of sedimentation and crystallization on the outer wall of the reverse osmosis membrane caused by the low flow rate of the raw water. Subsequently, the concentrate in the concentrate tank is discharged from the shell through the concentrate outlet pipe via the other side fins. This process achieves secondary osmosis filtration of the concentrate and extends the contact time between the raw water and the reverse osmosis membrane. After the subsequent work is completed, the float plate will slide downward under its own weight. During this process, the cleaning ring will clean the sedimentation and crystallization on the outer wall of the central tube, effectively preventing sedimentation and crystallization from clogging the permeate holes and effectively extending the overall service life of the reverse osmosis membrane.

[0008] The present invention is further configured such that the outer wall of the central tube is provided with a groove at the cleaning ring, and both the groove and the cleaning ring are provided with water seepage holes.

[0009] By adopting the above technical solution, the cleaning ring can slide up and down on the outer wall of the central tube through the groove, while ensuring that the inner wall of the reverse osmosis membrane is in contact with the outer wall of the central tube. The thickness of the support rod itself can be changed as needed to ensure the stability of the subsequent sliding of the cleaning ring on the outer wall of the central tube. At the same time, under the action of the seepage hole, the filtered pure water is facilitated to flow into the pure water through hole of the central tube during the flow of raw water, effectively collecting the pure water.

[0010] The present invention is further configured such that a pure water through hole is provided inside the central tube, and a pure water outlet pipe is installed at the bottom of the pure water through hole.

[0011] By adopting the above technical solution, the filtered pure water can be easily collected through the pure water through-hole, and then discharged directly to the outside through the pure water outlet pipe at the bottom. This process effectively reduces the flow path of the pure water and further improves the collection efficiency of pure water.

[0012] The present invention is further configured such that a concentrated water outlet and a concentrated water inlet are respectively provided at the top of the concentrated water outlet pipe and the raw water inlet pipe, and a sealing plate is sealed at the bottom of the fin at the concentrated water outlet.

[0013] By adopting the above technical solution, raw water is discharged into the raw water inlet pipe, and the concentrated water after one filtration flows into the concentrated water tank at the bottom through the concentrated water inlet. At the same time, because a sealing plate is installed at the concentrated water outlet, the concentrated water inside will be pumped out again by an external water pump under the action of the sealing plate, ensuring the sealing of the concentrated water outlet.

[0014] The present invention is further configured such that the inner wall of the concentrate tank is symmetrically provided with sliding grooves, and a slider that cooperates with the sliding grooves is installed on the outer wall of the float plate, and the sliding grooves and the sliders are smoothly arranged.

[0015] By adopting the above technical solution, the stability of the float plate when sliding upward is ensured through the cooperation of the slide groove and the slider, and the phenomenon of the float plate rotating itself is prevented. The slide plate is limited during the sliding process. Furthermore, since the slide groove and the slider are smoothly set, the sliding friction between the two is effectively reduced during the sliding process, preventing the float plate from getting stuck when sliding upward.

[0016] The present invention is further configured such that a drainage pipe is connected between the concentrate outlet and the concentrate tank, and a one-way valve is provided at the connection between one end of the drainage pipe and the concentrate tank.

[0017] By adopting the above technical solution, the concentrated water in the concentrated water tank can be easily extracted through the drain pipe, preventing the external water pump from running dry. Furthermore, the one-way valve between the drain pipe and the concentrated water tank can effectively prevent the concentrated water from flowing back, further improving the overall stability of the device.

[0018] The present invention is further configured such that the fins are sealed to the inner wall of the outer shell.

[0019] By adopting the above technical solution, it is ensured that both the incoming raw water and concentrate flow through the fins themselves, further increasing the contact time between the concentrate and the raw water and the reverse osmosis membrane, while effectively preventing subsequent concentrate leakage and the phenomenon of concentrate being discharged back into the concentrate tank.

[0020] The present invention is further configured such that the seepage hole is inclined downward.

[0021] By adopting the above technical solution, pure water can be discharged into the pure water passage of the central tube through the permeation hole during filtration, preventing the pure water from flowing back and further reducing the precipitation and crystallization on the reverse osmosis membrane.

[0022] The present invention is further configured such that the cleaning ring and the support rod are detachable.

[0023] By adopting the above technical solution, subsequent staff can disassemble and install the device separately during disassembly and maintenance, effectively reducing the maintenance burden on subsequent staff.

[0024] In summary, the present invention has the following main beneficial effects: This invention utilizes a partition on the outer wall of the reverse osmosis membrane to separate it from the outer shell. Simultaneously, fins are symmetrically arranged on the outer wall of the reverse osmosis membrane. When raw water enters the shell through the raw water inlet pipe, it gradually slides downwards along the outer wall of the fins, increasing the contact area between the raw water and the reverse osmosis membrane. Furthermore, the downward-sloping fins accelerate the flow rate of the incoming raw water, effectively reducing sedimentation and crystallization on the outer wall of the reverse osmosis membrane caused by low flow rates. Subsequently, the concentrated water in the concentrated water tank is discharged from the shell through the concentrated water outlet pipe via the other side of the fins. This process achieves secondary osmosis filtration of the concentrated water, effectively improving the overall filtration efficiency and extending the contact time between the raw water and the reverse osmosis membrane. This invention features a float plate that slides within the concentrate tank. As concentrate enters through the concentrate inlet, the float plate gradually slides upwards. During this process, the cleaning ring, supported by a support rod, slides upwards and seeps into the pure water passage through its perforations. After subsequent operation, the float plate slides downwards under its own weight. During this process, the cleaning ring cleans the sediment and crystals on the outer wall of the central tube, effectively preventing sediment and crystals from clogging the perforations and extending the overall service life of the reverse osmosis membrane. Furthermore, this process eliminates the need for manual disassembly and cleaning, reducing the overall cleaning burden on subsequent personnel. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the fin structure of the present invention; Figure 3 This is a schematic diagram of the concentrated water outlet structure of the present invention; Figure 4 This is a schematic diagram of the concentrated water inlet structure of the present invention; Figure 5 This is a cross-sectional view of the present invention; Figure 6 This is a schematic diagram of the structure of the first embodiment of the present invention; Figure 7 This is a top view of the floating plate of the present invention; Figure 8 For the present invention Figure 3 Enlarged view of A in the middle; Figure 9 For the present invention Figure 5 Enlarged view of B in the middle; Figure 10 This is a schematic diagram of the structure of the second embodiment of the present invention.

[0026] In the diagram: 1. Outer shell; 2. Central tube; 3. Raw water inlet pipe; 4. Concentrate outlet pipe; 5. Concentrate tank; 6. Pure water outlet pipe; 7. Reverse osmosis membrane; 8. Fins; 9. Concentrate inlet; 10. Baffle plate; 11. Concentrate outlet; 12. Pure water through hole; 13. Float plate; 14. Cleaning ring; 15. Groove; 16. Seepage hole; 17. Support rod; 18. Slide groove; 19. Sliding block; 20. Sealing plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The embodiments of the present invention will now be described. Example 1:

[0029] A reverse osmosis membrane filter element, such as Figures 1-9As shown, the device includes a housing 1, a central tube 2, a reverse osmosis membrane 7, a cleaning mechanism, and a sliding mechanism. Symmetrical baffles 10 are arranged on the outer wall of the reverse osmosis membrane 7. Through the cooperation of the baffles 10 and the housing 1, the reverse osmosis membrane 7 is divided into a raw water cavity and a concentrate cavity. A raw water inlet pipe 3 and a concentrate outlet pipe 4 are respectively located at the top of the housing 1, at the raw water cavity and concentrate cavity. The raw water inlet pipe 3 is connected to an external raw water source, discharging raw water into the raw water cavity inside the housing 1. Simultaneously, fins 8 are symmetrically arranged on the outer wall of the reverse osmosis membrane 7 via the baffles 10, and the fins 8 are inclined downwards. The raw water gradually slides downwards on the outer wall of the fins 8, increasing the contact area between the raw water and the reverse osmosis membrane 7, effectively improving the overall efficiency. The filtration effect of the membrane is improved, and because the fins 8 are inclined downwards, the flow rate of the incoming raw water is accelerated, effectively reducing the phenomenon of sedimentation and crystallization on the outer wall of the reverse osmosis membrane 7 caused by the low flow rate of the raw water. Subsequently, the pure water filtered by the reverse osmosis membrane 7 enters the pure water through-hole 12 of the central tube 2 through the seepage hole 16, and the concentrate flows into the concentrate tank 5 through the concentrate inlet 9. Since a float plate 13 is slidably installed inside the concentrate tank 5, and a support rod 17 is connected to the top of the float plate 13, and an array of cleaning rings 14 are slidably installed on the outer wall of the central tube 2, and the cleaning rings 14 are connected to the support rod 17, as the amount of concentrate in the concentrate tank 5 increases, it will drive the internal float plate 13 to slide upwards and float up. During this process, the cleaning rings 14 will be cleaned by the support rod 17. The cleaning ring 14 slides upward. Since a perforation hole 16 is also provided on the cleaning ring 14, pure water seeps into the pure water passage 12 through the perforation hole 16. The perforation hole 16 is inclined downwards, facilitating the discharge of pure water into the pure water passage 12 of the central tube during filtration, preventing backflow and further reducing precipitation and crystallization on the reverse osmosis membrane 7. Simultaneously, after the concentrated water in the concentrated water tank 5 rises to a certain height, a water pump is connected to one end of the concentrated water outlet pipe 4. A concentrated water outlet 11 and a concentrated water inlet 9 are respectively provided at the top of the concentrated water tank 5 at the concentrated water outlet pipe 4 and the raw water inlet pipe 3. A sealing plate 20 is sealed at the bottom of the fin 8 at the concentrated water outlet 11. Under the action of the sealing plate 20, the internal concentrate is pumped out again by an external water pump, ensuring the seal at the concentrate outlet 11. This process achieves secondary osmosis filtration of the concentrate, effectively improving the overall filtration effect. Furthermore, this process extends the contact time between the raw water and the reverse osmosis membrane 7. After the subsequent operation is completed, the float plate 13 slides downwards under its own weight. During this process, the cleaning ring 14 cleans the sediment and crystals on the outer wall of the central tube 2, effectively preventing the sediment and crystals from clogging the seepage holes 16, thus effectively extending the overall service life of the reverse osmosis membrane 7. Simultaneously, this process eliminates the need for manual disassembly and cleaning, reducing the overall cleaning burden on subsequent personnel. The fins 8 and the inner wall of the outer shell 1 are sealed together.This design ensures that both the incoming raw water and concentrate flow through the fins 8 themselves, further increasing the contact time between the concentrate, raw water, and reverse osmosis membrane 7. It also effectively prevents subsequent concentrate leakage and the possibility of concentrate being discharged back into the concentrate tank. Furthermore, the specific structure of the reverse osmosis membrane 7 is prior art to those skilled in the art, and therefore is not described in detail here.

[0030] Please see Figure 1 , Figure 5 and Figure 6 The outer wall of the central tube 2 is provided with grooves 15 at the cleaning ring 14. Both the grooves 15 and the cleaning ring 14 have water seepage holes 16. The grooves 15 allow the cleaning ring 14 to slide up and down on the outer wall of the central tube 2, while ensuring that the inner wall of the reverse osmosis membrane 7 is in contact with the outer wall of the central tube 2. The thickness of the support rod 17 can be changed as needed to ensure the stability of the subsequent sliding of the cleaning ring 14 on the outer wall of the central tube 2. At the same time, the water seepage holes 16 facilitate the flow of filtered pure water into the pure water through hole 12 of the central tube during the flow of raw water, effectively collecting the pure water. The interior of the central tube 2 is provided with a pure water through hole 12, and a pure water outlet pipe 6 is installed at the bottom of the pure water through hole 12. The pure water through hole 12 facilitates the collection of filtered pure water, and the pure water is directly discharged outward through the pure water outlet pipe 6 at the bottom. This process effectively reduces the flow path of pure water and further improves the collection efficiency of pure water.

[0031] Please see Figure 2 , Figure 5 and Figure 7 The inner wall of the concentrate tank 5 is symmetrically provided with sliding grooves 18, and a slider 19 that cooperates with the sliding grooves 18 is installed on the outer wall of the float plate 13. The sliding grooves 18 and the slider 19 are smoothly arranged. Through the cooperation of the sliding grooves 18 and the slider 19, the stability of the float plate 13 when sliding upward is ensured, and the float plate 13 is prevented from rotating. This achieves the function of limiting the float plate 13 during the sliding process. Furthermore, since the sliding grooves 18 and the slider 19 are smoothly arranged, the sliding friction between the two is effectively reduced during the sliding process, preventing the float plate 13 from getting stuck when sliding upward. A drain pipe is connected between the concentrate outlet 11 and the concentrate tank 5, and a one-way valve is provided at the connection between one end of the drain pipe and the concentrate tank 5. The drain pipe facilitates the extraction of concentrate from the concentrate tank 5, preventing the external water pump from running dry. The one-way valve between the drain pipe and the concentrate tank 5 can effectively prevent the concentrate from flowing back, further improving the overall stability of the device. Example 2:

[0032] A reverse osmosis membrane filter element, such as Figure 10As shown, the overall structure is similar to that of Embodiment 1. The difference lies in the fact that the outer wall of the central tube 2 is provided with a groove, which allows the support rod 17 to be inserted and slide up and down. This ensures that both the support rod 17 and the cleaning ring are within the groove of the central tube 2, guaranteeing the flatness of the outer wall of the central tube 2. Simultaneously, the cleaning ring 14 contacts the support rod 17. During subsequent winding of the reverse osmosis membrane 7, the flatness of the outer wall of the central tube 2 allows for a tight fit between the reverse osmosis membrane 7 and the outer wall of the central tube 2. This process improves the efficiency of pure water entering the pure water through-hole 12. Furthermore, the cleaning ring 14... The support rod 17 is detachable, allowing for easy disassembly and installation by staff during subsequent maintenance, effectively reducing their maintenance burden. The groove 15 and cleaning ring 14 are smoothly connected, reducing sliding friction between them as the float 13 moves the cleaning ring 14 up and down within the groove 15. This facilitates the subsequent extraction of concentrate from the concentrate tank 5, after which the float slides downwards under its own weight, causing the cleaning ring 14 to follow suit and prevent it from getting stuck in the groove 15.

[0033] The working principle of this invention is as follows: During use, raw water is introduced into the outer shell 1 through the raw water inlet pipe 3. At this time, under the action of the partition 10, the raw water flows through the fins 8 on the outer wall of the reverse osmosis membrane 7. During this process, the contact area between the raw water and the reverse osmosis membrane 7 is increased. At the same time, pure water flows through the seepage hole 16 into the pure water through hole 12 of the central pipe 2. Concentrated water flows into the concentrated water tank 5 at the bottom through the action of the fins 8. Then, the concentrated water in the concentrated water tank 5 is discharged through the concentrated water outlet 11 through the cooperation of the concentrated water outlet pipe 4 and the external water pumping assembly. At this time, the concentrated water flows on the other side of the reverse osmosis membrane 7, realizing secondary permeation filtration of the concentrated water, which effectively improves the overall filtration effect.

[0034] Although embodiments of the present invention have been shown and described, these specific embodiments are merely illustrative of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A reverse osmosis membrane filter element, comprising a shell (1) and a central tube (2), wherein a reverse osmosis membrane sheet (7) is wound around the outer wall of the central tube (2), characterized in that: The outer wall of the reverse osmosis membrane (7) is symmetrically provided with partitions (10), and the other end of the partitions (10) is sealed to the inner wall of the outer shell (1). The outer wall of the reverse osmosis membrane (7) is symmetrically provided with fins (8) through the partitions (10), and the fins (8) are inclined downward. The top of the outer shell (1) is provided with a concentrate outlet pipe (4) and a raw water inlet pipe (3). The bottom of the reverse osmosis membrane (7) is provided with a concentrate tank (5) at the fins (8). The inside of the concentrate tank (5) is slidably provided with a float plate (13), and a support rod (17) is connected to the top of the float plate (13). The outer wall of the central tube (2) is slidably provided with an array of cleaning rings (14), and the cleaning rings (14) are connected to the support rods (17).

2. The reverse osmosis membrane filter element according to claim 1, characterized in that: The outer wall of the central tube (2) is provided with a groove (15) at the cleaning ring (14), and both the groove (15) and the cleaning ring (14) are provided with water seepage holes (16).

3. The reverse osmosis membrane filter element according to claim 1, characterized in that: The center tube (2) is provided with a pure water through hole (12) inside, and a pure water outlet pipe (6) is installed at the bottom of the pure water through hole (12).

4. A reverse osmosis membrane filter element according to claim 1, characterized in that: The top of the concentrate tank (5) is provided with a concentrate outlet (11) and a concentrate inlet (9) at the concentrate outlet pipe (4) and the raw water inlet pipe (3) respectively. The bottom of the fin (8) is sealed with a sealing plate (20) at the concentrate outlet (11). By discharging raw water into the raw water inlet pipe (3), the concentrate after one filtration will flow into the concentrate tank (5) at the bottom through the concentrate inlet (9). At the same time, since the concentrate outlet (11) is sealed with a sealing plate (20), the concentrate inside will be pumped out again by an external water pump under the action of the sealing plate (20), ensuring the sealing of the concentrate outlet (11).

5. A reverse osmosis membrane filter element according to claim 1, characterized in that: The inner wall of the concentrate tank (5) is symmetrically provided with sliding grooves (18), and a slider (19) that cooperates with the sliding grooves (18) is installed on the outer wall of the float plate (13). The sliding grooves (18) and the slider (19) are smoothly arranged.

6. A reverse osmosis membrane filter element according to claim 4, characterized in that: A drain pipe is connected between the concentrated water outlet (11) and the concentrated water tank (5), and a one-way valve is provided at the connection between one end of the drain pipe and the concentrated water tank (5).

7. A reverse osmosis membrane filter element according to claim 1, characterized in that: The fins (8) are sealed to the inner wall of the outer shell (1).

8. A reverse osmosis membrane filter element according to claim 2, characterized in that: The seepage hole (16) is inclined downwards.

9. A reverse osmosis membrane filter element according to claim 1, characterized in that: The cleaning ring (14) and the support rod (17) are detachable.

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