Anti-fouling reverse osmosis concentrated water recycling device and method

Abstract

The application relates to a scale-prevention reverse osmosis concentrated water recycling device and method, and relates to the technical field of reverse osmosis devices, comprising an inner pipe assembly, the inner pipe assembly comprises a plurality of uniformly distributed inner sleeve pipes, a fixing ring is arranged in the inner sleeve pipes, a reverse osmosis membrane is arranged on the inner side of the fixing ring, a sealing capsule which is tightly attached to the inner wall of the inner sleeve pipe after being inflated is arranged on the outer side of the fixing ring, a regulating and controlling assembly for controlling the rotation of the reverse osmosis membrane is further arranged, the fixing ring drives the reverse osmosis membrane to rotate through the regulating and controlling assembly, the side surface of the reverse osmosis membrane is axially parallel to the inner sleeve pipe, and the membrane surface impurities are cleaned through cooperation of water flushing, long-term accumulation of impurities is avoided to form scale, membrane pollution is reduced, the service life of the reverse osmosis membrane is prolonged, the opening and closing states of the flow-through holes in the upper cavity and the lower cavity of the inner sleeve pipe are regulated and controlled through an outer pipe assembly, the flow direction of the concentrated water in the inner sleeve pipe can be flexibly changed, the wear degree of each region of the reverse osmosis membrane can be balanced, and the treatment efficiency caused by local excessive wear is avoided to be reduced.

Description

Technical Field

[0001] This application relates to the field of reverse osmosis equipment technology, and in particular to a reverse osmosis concentrate recycling device and method for preventing scaling. Background Technology

[0002] Reverse osmosis is a highly efficient and clean desalination technology widely used in various industries. However, during the production process, approximately 25% of the total influent water is discharged as concentrated water. This results in a significant waste of water resources in today's increasingly scarce water situation and seriously hinders the further promotion of reverse osmosis technology. Therefore, it is necessary to use concentrated water recovery devices to recycle and reuse the concentrated water.

[0003] For example, Chinese patent CN213771436U discloses an integrated system of primary reverse osmosis and concentrate reverse osmosis. This prior art directly utilizes concentrate resources by adding a concentrate reverse osmosis device to the primary reverse osmosis device, thereby reducing water costs and land area.

[0004] However, the above has some shortcomings in actual use:

[0005] 1. The existing technology uses a primary reverse osmosis concentrate pipeline equipped with a concentrate reverse osmosis membrane to treat concentrate. During operation, impurities easily adhere to the membrane surface and gradually accumulate to form stubborn fouling, which is not only difficult to clean, but also reduces the membrane's permeability and aggravates membrane fouling.

[0006] 2. The current concentrated water flow direction in the primary reverse osmosis concentrate pipeline is fixed and singular, which results in uneven load on each reverse osmosis membrane and membrane body in different areas, and is prone to excessive wear in some areas, thus affecting the overall concentrate treatment efficiency.

[0007] Therefore, based on the above analysis, there is still room for improvement in existing reverse osmosis concentrate equipment. Summary of the Invention

[0008] To address the aforementioned problems, this application provides, on the one hand, a reverse osmosis concentrate recycling device with anti-scaling properties:

[0009] It includes an inner tube assembly, which comprises multiple evenly distributed inner tubes.

[0010] The inner sleeve has multiple evenly distributed and self-rotating fixed rings. Inside the fixed rings is a reverse osmosis membrane that intercepts impurities in the concentrate. Outside the fixed rings is a bulging sealing bladder that fits tightly against the inner wall of the inner sleeve.

[0011] It also includes a control component for rotating the fixed ring and injecting air into the sealing bladder. The control component drives the fixed ring to rotate so that the side of the reverse osmosis membrane is parallel to the axial direction of the inner sleeve. The clean water flowing inside the inner sleeve washes away the dirt adhering to the surface of the reverse osmosis membrane.

[0012] The inner sleeve has an upper cavity and a lower cavity distributed vertically on its exterior. The inner sleeve has flow holes on its side near both ends that communicate with the upper cavity and the lower cavity, respectively. It also has an outer tube assembly for controlling the opening and closing of the flow holes. The flow direction of the concentrate in the inner sleeve is controlled by controlling the opening and closing of the flow holes at both ends of the inner sleeve through the outer tube assembly.

[0013] Preferably, a rotating shaft is installed on the side of the fixing ring, which penetrates the side wall of the inner sleeve and is rotatably connected to it. The rotating shaft has a built-in air guide tube that communicates with the sealing bladder.

[0014] Preferably, the control component includes a guide tube installed on the side of the inner sleeve, and the upper end of the rotating shaft on the side of the fixing ring extends into the guide tube.

[0015] Preferably, a guide rod is coaxially and laterally slidably arranged inside the guide tube, a drive gear is installed at the end of the rotating shaft extending into the cavity, a transmission rack that meshes with the drive gear is installed on the side of the guide rod, and a power source for controlling the left and right sliding of the guide rod is installed at one end of the guide tube.

[0016] Preferably, the outer tube assembly includes an outer tube installed outside the inner tube. A set of positioning plates with sides connected to the inner tube are symmetrically installed on the inner wall of the outer tube, dividing the area between the inner tube and the outer tube into upper and lower cavities, corresponding to the upper cavity and the lower cavity.

[0017] Preferably, both the upper and lower cavities are provided with a set of arc-shaped pressure plates that are slidably connected to the inner wall of the inner sleeve. The distance between the two arc-shaped pressure plates is less than the distance between the two flow holes in the same cavity. When one arc-shaped pressure plate in the same set blocks the flow hole, the other arc-shaped pressure plate does not block the flow hole. The two arc-shaped pressure plates in the same cavity are supported by a support frame on their sides.

[0018] Preferably, a drive motor is installed at one end of the inner sleeve, a driven gear is installed at the drive end of the drive motor, and the end of the support frame near the driven gear extends to the outside of the outer sleeve and is equipped with a matching rack that meshes with the driven gear.

[0019] Preferably, the upper cavity of all outer tubes at each level is connected to a common adapter conduit, and the ends of all adapter conduits are connected to a common inlet conduit for inlet concentrated water. The lower cavity of all outer tubes at each level is connected to a common drain conduit, and the ends of all drain conduits are connected to a common outlet conduit for outlet clean water.

[0020] On the other hand, this application also provides a method for anti-scaling reverse osmosis concentrate recycling, comprising the following steps:

[0021] S1. Concentrate permeation: Concentrate is introduced into the inner tube assembly to permeate it.

[0022] S2. Change direction: After a predetermined time, change the direction of concentrated water in the inner casing through the outer casing assembly.

[0023] S3. Internal cleaning: Clean the reverse osmosis membrane after a fixed period of use of the device.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] I. This application uses a control component to drive the fixed ring to rotate the reverse osmosis membrane, making the side of the reverse osmosis membrane parallel to the axial direction of the inner sleeve. Combined with the flushing of clean water, this cleans the membrane surface of impurities, prevents the long-term accumulation of impurities to form fouling, reduces membrane fouling, extends the service life of the reverse osmosis membrane, and lowers equipment maintenance costs.

[0026] Second, this application regulates the opening and closing status of the flow holes in the upper and lower chambers of the inner sleeve by adjusting the outer tube assembly, which can flexibly change the flow direction of concentrate in the inner sleeve, balance the wear degree of each area of ​​the reverse osmosis membrane, avoid the decrease in treatment efficiency caused by excessive local wear, and ensure the long-term stable operation of the device.

[0027] Third, when cleaning the reverse osmosis membrane, the flow direction of purified water can be frequently changed through the external tube assembly to form a multi-directional flushing effect. Compared with single-direction flushing, it can thoroughly remove impurities from the membrane surface and further improve the cleaning effect. Attached Figure Description

[0028] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a structural diagram of this application.

[0030] Figure 2 This is a side view of this application.

[0031] Figure 3 This is a schematic diagram of the main structure of this application.

[0032] Figure 4 This is a schematic diagram of the inner tube assembly structure of this application.

[0033] Figure 5 This is a schematic diagram of the internal tube assembly cleaning state structure in this application.

[0034] Figure 6 This is a partial sectional view of the inner tube assembly of this application.

[0035] Figure 7 This is a schematic diagram of the control component structure of this application.

[0036] Figure 8 yes Figure 7 Enlarged view of section A in the middle.

[0037] Figure 9 This is a schematic diagram of the outer tube assembly structure of this application.

[0038] Figure 10 This is a schematic diagram of the main structure of the outer tube component of this application.

[0039] Figure 11 This is a partial sectional view of the outer tube assembly of this application.

[0040] Figure 12 This is a schematic diagram of the gas injection component structure of this application.

[0041] Figure 13 This is a cross-sectional view of the gas injection component of this application.

[0042] In the diagram: 1. Frame; 2. Inner tube assembly; 21. Inner sleeve; 22. Rotating shaft; 23. Fixing ring; 24. Reverse osmosis membrane; 25. Sealing bladder; 26. Air guide tube; 27. Flow hole; 3. Control assembly; 31. Flow guide tube; 32. Divider plate; 33. Piston I; 34. Limiting ring I; 35. Electric cylinder; 37. Guide rod; 38. Drive gear; 39. Transmission rack; 310. Connecting pipe; 311. Check valve; 312. Air inlet duct; 4. Outer tube assembly; 41. Outer sleeve; 42. Arc-shaped pressure plate; 43. Support frame; 44. Drive motor; 45. Driven gear; 46. Adaptor rack; 47. Positioning plate; 48. Protective shell; 9. Linkage rod; 10. Adapter duct; 11. Water inlet duct; 12. Water outlet duct; 13. Drainage duct; 14. Upper chamber; 15. Lower chamber. Detailed Implementation

[0043] The following is in conjunction with the appendix Figures 1-13 The embodiments of this application will be described in detail.

[0044] This application discloses an anti-scaling reverse osmosis concentrate recycling device. By controlling the fixed ring driven by the control component, the reverse osmosis membrane is rotated, so that the side of the reverse osmosis membrane is parallel to the axial direction of the inner sleeve. Combined with the flushing of clean water, the impurities on the membrane surface are cleaned, avoiding the long-term accumulation of impurities to form scale, reducing membrane fouling, extending the service life of the reverse osmosis membrane, and reducing equipment maintenance costs.

[0045] Example 1:

[0046] like Figures 1-4As shown, the system includes an inner tube assembly 2, which consists of multiple evenly distributed inner sleeves 21. Each inner sleeve 21 has multiple evenly distributed, rotatable fixing rings 23 inside, and a reverse osmosis membrane 24 is fitted inside each fixing ring 23. When high-pressure concentrate is introduced from one end of the inner sleeve 21, water molecules in the concentrate will pass through the reverse osmosis membrane 24, reverse osmosis from the side with higher concentration to the side with lower concentration, thereby intercepting impurities in the concentrate through the reverse osmosis membrane 24.

[0047] like Figures 4-6 As shown, a sealing bladder 25 is provided on the outer side of the fixing ring 23, and an annular groove for installing the sealing bladder 25 is formed on the outer side of the sealing bladder 25. When the sealing bladder 25 is vented, the annular groove can limit the sealing bladder 25 on three sides, so that the sealing bladder 25 can only expand towards the inner wall of the inner sleeve 21 until it is tightly fitted with the inner wall of the inner sleeve 21, thereby preventing concentrated water from leaking from the gap between the fixing ring 23 and the inner sleeve 21. The sealing bladder 25 is made of fluororubber, which has excellent sealing performance and corrosion resistance.

[0048] like Figure 6 As shown, a rotating shaft 22 is installed on the side of the fixed ring 23, which penetrates the side wall of the inner sleeve 21 and is rotatably connected to it. The rotating shaft 22 is provided with a venting pipe 26 that communicates with the sealing bladder 25. Gas can be injected into the sealing bladder 25 through the venting pipe 26. When the sealing bladder 25 needs to contract, excess gas can be discharged through the venting pipe 26, thereby realizing the expansion and contraction regulation of the sealing bladder 25.

[0049] like Figure 3 and Figure 5 As shown, a control assembly 3 is also provided for controlling the rotation of the fixed ring 23 and the air injection of the sealing bladder 25. When the device is not in use, the fixed ring 23 is driven to rotate by the control assembly 3, so that the side of the reverse osmosis membrane 24 is parallel to the axis of the inner sleeve 21. At this time, purified water flows in the inner sleeve 21 to flush the side of the reverse osmosis membrane 24, wash off the impurities attached to the surface of the reverse osmosis membrane 24 and discharge them with the water flow, which plays a cleaning role and prevents impurities from adhering for a long time and forming dirt. At the same time, before and after the fixed ring 23 rotates, the sealing bladder 25 needs to be vented to form a gap between the fixed ring 23 and the inner wall of the inner sleeve 21, so as to prevent the sealing bladder 25 from obstructing the normal rotation of the fixed ring 23.

[0050] like Figure 3 , Figure 4 and Figure 11As shown, the inner sleeve 21 has an upper cavity 14 and a lower cavity 15 distributed vertically on its exterior. The inner sleeve 21 has flow holes 27 on its side near both ends, which communicate with the upper cavity 14 and the lower cavity 15, respectively. The device is also equipped with an outer tube assembly 4 to control the opening and closing of the flow holes 27. The outer tube assembly 4 opens the flow hole 27 at the left end of the upper cavity 14 of the inner sleeve 21 and closes the flow hole 27 at the right end. At the same time, it closes the flow hole 27 at the left end of the inner sleeve 21 and opens the flow hole 27 at the right end of the lower cavity 15. In this way, after the concentrate enters the upper cavity 14, it will enter the left end of the inner sleeve 21 through the open flow hole 27 of the upper cavity 14, flow from the left end of the inner sleeve 21 to the right end, and after reverse osmosis treatment, it will be discharged into the lower cavity 15 through the open flow hole 27 at the right end of the inner sleeve 21.

[0051] Conversely, by adjusting the outer tube assembly 4, the right end flow hole 27 of the upper chamber 14 is opened and the left end flow hole 27 is closed, and the left end flow hole 27 of the lower chamber 15 is opened and the right end flow hole 27 is closed. At this time, after the concentrate enters the inner sleeve 21, it will flow from the right end to the left end. By changing the flow direction of the concentrate, the wear degree of the reverse osmosis membrane 24 can be balanced and its service life can be extended.

[0052] In summary, by using the outer tube assembly 4 to open the left-end flow hole 27 and close the right-end flow hole 27 in the upper chamber 14 of the inner sleeve 21, and by closing the left-end flow hole 27 and opening the right-end flow hole 27 in the lower chamber 15 of the inner sleeve 21, the concentrated water enters the upper chamber 14 and first enters the left end of the inner sleeve 21 through the open flow hole 27. After flowing from the left end to the right end of the inner sleeve 21, the reverse osmosis membrane 24 intercepts impurities in the concentrated water. Conversely, by opening the right-end flow hole 27 and closing the left-end flow hole 27 in the upper chamber 14, and opening the left-end flow hole 27 and closing the right-end flow hole 27 in the lower chamber 15, the concentrated water enters the inner sleeve 21 and flows from the right end to the left end, changing the direction of the concentrated water flow and balancing the wear of the reverse osmosis membrane 24.

[0053] During cleaning, the fixing ring 23 is rotated by the control component 3 to make the side of the reverse osmosis membrane 24 parallel to the direction of the inner sleeve 21, allowing clean water to flow through the inner sleeve 21. The clean water is used to flush the side of the reverse osmosis membrane 24, washing off the impurities adhering to the reverse osmosis membrane 24 and draining them away with the water, thus achieving a cleaning effect and preventing impurities from adhering for a long time and forming dirt. At the same time, when rinsing the surface of the reverse osmosis membrane 24, the direction of clean water flow can also be changed by the outer tube component 4. By frequently changing the direction of clean water flow, the cleaning effect can be further improved.

[0054] like Figure 7 and Figure 8As shown, the control component 3 includes a guide tube 31 installed on the side of the inner sleeve 21. A guide rod 37 is coaxially and laterally slidably arranged inside the guide tube 31. The upper ends of the rotating shaft 22 and the gas guide tube 26 both extend into the cavity. The upper end of the gas guide tube 26 extends to the outside of the rotating shaft 22, and a drive gear 38 is installed on the upper end of the rotating shaft 22. A transmission rack 39 that meshes with the drive gear 38 is installed on the side of the guide rod 37. The movement of the guide rod 37 drives the transmission rack 39 to move synchronously. The moving transmission rack 39 drives the rotating shaft 22 to rotate through the drive gear 38, and then drives the reverse osmosis membrane 24 to achieve rotation control through the fixed ring 23.

[0055] All the guide tubes 31 are connected to a multi-port pipe (not shown) on their sides. An air pump (not shown) is installed at the input end of the multi-port pipe, and a solenoid valve (not shown) is installed at the input end. When in use, air is injected into the guide tubes 31 by the air pump. Then the gas enters the sealing bladder 25 and expands to seal the gap. After completion, the solenoid valve is closed to prevent air leakage. When cleaning, the solenoid valve is opened first. Each sealing bladder 25 compresses its own elasticity to push the gas back into the guide tubes 31, thereby releasing the gas.

[0056] like Figure 7 As shown, a power source for controlling the left and right sliding of the guide rod 37 is installed at one end of the guide pipe 31. The power source includes an electric cylinder 35. The telescopic arm of the electric cylinder 35 extends into the guide pipe 31 and is connected to the end of the guide rod 37. The telescopic movement of the electric cylinder 35 can drive the guide rod 37 to move left and right, thereby realizing the displacement control of the guide rod 37.

[0057] When the electric cylinder 35 extends to its longest stroke, the side of the reverse osmosis membrane 24 is exactly perpendicular to the axis of the inner sleeve 21. When the stroke of the electric cylinder 35 is reduced to its shortest stroke, the reverse osmosis membrane 24 rotates 90 degrees, making its side parallel to the axis of the inner sleeve 21. At this time, the side of the reverse osmosis membrane 24 can be cleaned.

[0058] In summary, when cleaning is required, first open the solenoid valve on the multi-port pipe. Each sealing bladder 25 will re-push the gas back into the guide tube 31 through its own elastic contraction, thus releasing the gas. The electric cylinder 35 will then contract to its shortest stroke, and the reverse osmosis membrane 24 will rotate 90 degrees so that its side is parallel to the axis of the inner sleeve 21, allowing for cleaning. After cleaning, when the electric cylinder 35 extends to its longest stroke, the reverse osmosis membrane 24 will rotate in the opposite direction until its side is exactly perpendicular to the axis of the inner sleeve 21. Air will then be injected into the sealing bladder 25 using the air injection pump until it is full and the gaps are sealed. After that, the solenoid valve and the air injection pump will be closed.

[0059] like Figure 9 and Figure 11As shown, the outer tube assembly 4 includes an outer tube 41 installed outside the inner tube 21. A set of positioning plates 47 connected to the inner tube 21 are symmetrically installed on the inner wall of the outer tube 41. The positioning plates 47 divide the area between the inner tube 21 and the outer tube 41 into two cavities, corresponding to the upper cavity 14 and the lower cavity 15 respectively.

[0060] like Figure 9 and Figure 10 As shown, both the upper cavity 14 and the lower cavity 15 are equipped with a set of arc-shaped pressure plates 42 that are slidably connected to the inner wall of the inner sleeve 21. The distance between the two arc-shaped pressure plates 42 is less than the distance between the two flow holes 27 in the same cavity. When one arc-shaped pressure plate 42 in the same set blocks the flow hole 27, the other arc-shaped pressure plate 42 does not block the flow hole 27. The two arc-shaped pressure plates 42 in the same cavity are supported by a support frame 43 on their sides. By controlling the left and right movement of the support frame 43, the two arc-shaped pressure plates 42 can be moved synchronously, thereby realizing the opening and closing control of the left and right flow holes 27 in the upper cavity 14 or the lower cavity 15.

[0061] like Figure 9 and Figure 10 As shown, a drive motor 44 is installed at one end of the inner sleeve 21, and a driven gear 45 is installed at the driving end of the drive motor 44. The end of the support frame 43 near the driven gear 45 extends to the outside of the outer sleeve 41 and is equipped with an adapter rack 46 that meshes with the driven gear 45. The drive motor 44 drives the driven gear 45 to rotate, and the rotating driven gear 45 drives the two adapter racks 46 to move towards each other. In turn, the support frame 43 drives the two sets of arc-shaped pressure plates 42 to move towards each other, thus completing the switching of the opening and closing state of the flow hole 27.

[0062] like Figure 9 As shown, the end of the inner sleeve 21 where the drive motor 44 is installed is fitted with a protective shell 48 that encloses the drive motor 44, the driven gear 45, and the matching rack 46, thus protecting them.

[0063] like Figure 1 and Figure 2 As shown, the upper cavity 14 of all outer tubes 41 at each level is connected to a common connecting conduit 10, and the ends of all connecting conduits 10 are connected to a common inlet conduit 11 for introducing concentrated water; the lower cavity 15 of all outer tubes 41 at each level is connected to a common drain conduit 13, and the ends of all drain conduits 13 are connected to a common outlet conduit 12 for discharging purified water. Concentrated water enters each connecting conduit 10 through the inlet conduit 11, and then enters the upper cavity 14 of the corresponding outer tube 41 through the connecting conduit 10. After being treated by the inner tube assembly 2 and converted into purified water, the concentrated water is discharged into the lower cavity 15, and then collected through the drain conduit 13 to the outlet conduit 12, and finally discharged from the device.

[0064] In summary, in the initial state, the left-end arc-shaped pressure plate 42 in the upper cavity 14 does not block the flow hole 27, while the right-end arc-shaped pressure plate 42 does, thus opening the left-end flow hole 27 of the inner sleeve 21 in the upper cavity 14 and closing the right-end flow hole 27; the left-end arc-shaped pressure plate 42 in the lower cavity 15 blocks the flow hole 27, while the right-end arc-shaped pressure plate 42 does not, thus opening the right-end flow hole 27 of the inner sleeve 21 in the lower cavity 15 and closing the left end. Concentrated water enters each of the transition conduits 10 through the inlet conduit 11, then enters the upper cavity 14 through the transition conduit 10, and then enters the inner sleeve 21 through the left-end flow hole 27 of the inner sleeve 21 in the upper cavity 14. After flowing to the right end, it is discharged into the lower cavity 15 through the right-end flow hole 27, and then discharged externally through the outlet conduit 12 via the drain conduit 13. The drive motor 44 drives the driven gear 45 to rotate 90 degrees. The rotating driven gear 45 drives two matching racks 46 to move towards each other, thereby driving two sets of arc-shaped pressure plates 42 to move towards each other through the support frame 43. In this way, the two arc-shaped pressure plates 42 in the upper cavity 14 move to the left, opening the right end flow hole 27 in the inner sleeve 21 of the upper cavity 14 and closing the left end flow hole 27 in the inner sleeve 21 of the upper cavity 14. In the lower cavity 15, the two arc-shaped pressure plates 42 move to the right, closing the right end flow hole 27 in the inner sleeve 21 of the lower cavity 15 and opening the left end flow hole 27. In this way, after the concentrate enters the inner sleeve 21, it moves from the right end to the left end.

[0065] like Figure 1 and Figure 2 As shown, a set of mountain-shaped frames 1 are set below all inner tube assemblies 2. A linkage rod 9 is installed between the vertical rods at the same position of the two frames 1, which is connected to all outer tubes 41 of the same height. The outer tube 41 is firmly connected to the frame 1 through the linkage rod 9. The frame 1 is supported on the ground, providing a stable installation foundation for the entire device.

[0066] Example 2:

[0067] Based on Example 1, such as Figure 12 and Figure 13 As shown, the guide tube 31 is equipped with several evenly distributed partition plates 32 that are slidably connected to the guide rod 37, dividing the inside of the guide tube 31 into multiple independent cavities. Each cavity corresponds to the top of a fixing ring 23, so that the upper end of the rotating shaft 22 on the side of the fixing ring 23 is located in the corresponding cavity.

[0068] like Figure 12 and Figure 13As shown, an iron piston I33 is mounted on the surface of the guide rod 37 in each cavity. A sealing ring is fitted on the outer side of the piston I33 to fit tightly against the inner wall of the guide tube 31, ensuring the cavity's airtightness. A limit ring I34 is installed on the side of the piston I33 near the electric cylinder 35, limiting the movement range of the piston I33. When the electric cylinder 35 extends and moves the guide rod 37, it simultaneously moves the piston I33 towards the guide tube 26. The moving piston I33 forces the gas in the cavity through the guide tube 26 into the sealing bladder 25, causing the sealing bladder 25 to bulge and fit against the inner wall of the inner sleeve 21.

[0069] like Figure 12 and Figure 13 As shown, a connecting pipe 310, which communicates with the inner sleeve 21, is installed between the piston I 33 and the limiting ring I 34 in each cavity. A check valve 311 is installed at the end of the connecting pipe 310 near the inner sleeve 21, and the connection between the connecting pipe 310 and the inner sleeve 21 is close to the fixing ring 23. When the electric cylinder 35 shortens, it drives the piston I 33 to move towards the limiting ring I 34, thereby forcing the gas in the cavity into the connecting pipe 310. The gas enters the purified water in the inner sleeve 21 from the lower port of the connecting pipe 310, generating bubbles around the reverse osmosis membrane 24, which can further improve the cleaning effect. The check valve 311 can prevent purified water from entering the cavity of the guide pipe 31 through the connecting pipe 310, ensuring the normal operation of the control component 3.

[0070] like Figure 12 and Figure 13 As shown, an air inlet duct 312 aligned with the upper end of the connecting pipe 310 is also installed on the side of the guide pipe 31. When the reverse osmosis membrane 24 rotates to be parallel to the axial direction of the inner sleeve 21, the electric cylinder 35 of the control controller causes the guide rod 37 to make a short-distance reciprocating motion. While driving the piston I 33 to move in the same direction, it also drives the reverse osmosis membrane 24 to reciprocate at the same angle, enhancing the flushing effect. When the piston I 33 moves towards the rotating shaft 22, the external gas enters the cavity through the air inlet duct 312 to complete the gas replenishment. When the piston I 33 moves in the opposite direction, the gas is first forced into the connecting pipe 310 and then enters the clean water in the inner sleeve 21, generating bubbles around the reverse osmosis membrane 24 and flushing the surface of the reverse osmosis membrane 24, which can further improve the cleaning effect.

[0071] Furthermore, the length of the electric cylinder 35 is less than the distance between the upper port of the connecting pipe 310 and the rotating shaft 22, so as to prevent the piston I 33 from moving to the outside of both.

[0072] In summary, during operation, the electric cylinder 35 extends, driving each piston I 33 to move via the guide rod 37. The moving piston I 33 forces air into the sealing bladder 25 through the air guide tube 26, causing the sealing bladder 25 to slightly inflate. Simultaneously, it drives the transmission rack 39 to move. The moving transmission rack 39 drives the rotating shaft 22 to rotate via the drive gear 38, which in turn drives the reverse osmosis membrane 24 to rotate via the fixing ring 23. When the electric cylinder 35 is extended to its longest position, the side of the reverse osmosis membrane 24 is perpendicular to the inner sleeve 21, and the sealing bladder 25 is in close contact with the inner wall of the inner sleeve 21, completing the working state transition. Conversely, when cleaning the reverse osmosis membrane 24, the electric cylinder 35 retracts to its shortest position. First, the piston I 33 moves in the opposite direction, and the sealing bladder 25 itself contracts elastically, expelling excess gas back into the cavity. The reverse osmosis membrane 24 rotates in the opposite direction, making its side parallel to the inner sleeve 21, allowing for the cleaning operation.

[0073] During the cleaning process, the controller controls the electric cylinder 35 to make the guide rod 37 reciprocate a short distance, which drives the piston I 33 to move in the same direction and simultaneously drives the reverse osmosis membrane 24 to reciprocate at the same angle. When the piston I 33 moves towards the rotating shaft 22, external gas enters the cavity through the air inlet pipe 312 to replenish the gas. When the piston I 33 moves in the opposite direction, the gas is first forced into the connecting pipe 310 and then enters the clean water in the inner sleeve 21, generating bubbles around the reverse osmosis membrane 24, which can further improve the cleaning effect. After cleaning, the reverse osmosis membrane 24 is rotated again to make it perpendicular to the inner sleeve 21 to restore normal operation.

[0074] This application also discloses a method for preventing scaling and recycling reverse osmosis concentrate, the method comprising the following steps:

[0075] S1. Concentrated water permeation: Concentrated water is introduced into the inner tube assembly 2 for permeation treatment. Specifically, in the initial state, the left end flow hole 27 of the inner sleeve 21 of the upper chamber 14 is open and the right end flow hole 27 is closed, while the right end flow hole 27 of the inner sleeve 21 of the lower chamber 15 is open and the left end is closed. The concentrated water enters each of the transfer tubes 10 through the inlet tube 11, and then enters the upper chamber 14 through the transfer tubes 10. Subsequently, it enters the inner sleeve 21 from the left end flow hole 27 of the inner sleeve 21 of the upper chamber 14. The concentrated water flows through each of the reverse osmosis membranes 24 in the inner sleeve 21. After being purified by permeation and converted into clean water, it is discharged into the lower chamber 15 from the right end flow hole 27, and then collected into the outlet tube 12 through the drain tube 13, and finally discharged from the device.

[0076] S2. Change of direction: After a predetermined time, the flow direction of the concentrate in the inner sleeve 21 is changed by the outer tube assembly 4. Specifically, the drive motor 44 drives the driven gear 45 to rotate 90 degrees. The rotating driven gear 45 drives two matching racks 46 to move towards each other, which in turn drives the two sets of arc-shaped pressure plates 42 to move towards each other through the support frame 43. At this time, the two arc-shaped pressure plates 42 in the upper cavity 14 move to the left, so that the right end flow hole 27 of the inner sleeve 21 in the upper cavity 14 opens and the left end flow hole 27 closes. The two arc-shaped pressure plates 42 in the lower cavity 15 move to the right, so that the right end flow hole 27 of the inner sleeve 21 in the lower cavity 15 closes and the left end flow hole 27 opens. After the concentrate enters the inner sleeve 21, it flows from the right end to the left end, realizing the switching of the concentrate flow direction.

[0077] S3. Internal Cleaning: After a fixed period of use, the reverse osmosis membrane 24 is cleaned. Specifically, when cleaning the reverse osmosis membrane 24, the electric cylinder 35 is shortened to half its stroke. First, the piston I 33 moves in the reverse direction, and the sealing bladder 25 contracts due to its own elasticity, expelling excess gas back into the cavity of the guide tube 31. At the same time, the reverse osmosis membrane 24 is reversed so that its side is parallel to the axis of the inner sleeve 21. Then, purified water is allowed to circulate in the inner sleeve 21, using the purified water to flush the side of the reverse osmosis membrane 24, washing off impurities adhering to the surface of the reverse osmosis membrane 24 and discharging them with the water flow, thus achieving a cleaning effect and preventing impurities from adhering for a long time and forming dirt. At the same time, during the flushing process of the reverse osmosis membrane 24, the direction of purified water flow can also be frequently changed through the outer tube assembly 4 to further improve the cleaning effect.

[0078] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects.

[0079] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A reverse osmosis concentrate recycling device for preventing scaling, comprising an inner pipe assembly (2), the inner pipe assembly (2) comprising multiple uniformly distributed inner sleeves (21), characterized in that: The inner sleeve (21) is provided with multiple evenly distributed and self-rotating fixed rings (23). The inner side of the fixed ring (23) is provided with a reverse osmosis membrane (24) that intercepts impurities in the concentrate. The outer side of the fixed ring (23) is provided with a sealing bladder (25) that bulges out and fits tightly against the inner wall of the inner sleeve (21). It also provides a control component (3) for controlling the rotation of the fixed ring (23) and the air injection into the sealing bladder (25). The fixed ring (23) is driven to rotate by the control component (3) so that the side of the reverse osmosis membrane (24) is parallel to the axial direction of the inner sleeve (21). The clean water flowing in the inner sleeve (21) washes away the dirt adhering to the surface of the reverse osmosis membrane (24). The inner sleeve (21) is provided with an upper cavity (14) and a lower cavity (15) distributed vertically on the outside. The inner sleeve (21) has flow holes (27) that communicate with the upper cavity (14) and the lower cavity (15) respectively on the side near both ends. An outer tube assembly (4) is also provided to control the opening and closing of the flow holes (27). The flow direction of the concentrated water in the inner sleeve (21) is controlled by controlling the opening and closing of the flow holes (27) at both ends of the inner sleeve (21) through the outer tube assembly (4).

2. The anti-scaling reverse osmosis concentrate recycling device according to claim 1, characterized in that: The fixed ring (23) is equipped with a rotating shaft (22) that passes through the side wall of the inner sleeve (21) and is rotatably connected to it. The rotating shaft (22) has a built-in air guide tube (26) that communicates with the sealing bag (25).

3. The anti-scaling reverse osmosis concentrate recycling device according to claim 2, characterized in that: The control component (3) includes a guide tube (31) installed on the side of the inner sleeve (21), and the upper end of the rotating shaft (22) on the side of the fixing ring (23) extends into the guide tube (31).

4. The anti-scaling reverse osmosis concentrate recycling device according to claim 3, characterized in that: A guide rod (37) is coaxially and laterally slidably installed inside the guide tube (31). A drive gear (38) is installed at the end of the shaft (22) extending into the cavity. A transmission rack (39) that meshes with the drive gear (38) is installed on the side of the guide rod (37). A power source for controlling the left and right sliding of the guide rod (37) is installed at one end of the guide tube (31).

5. The anti-scaling reverse osmosis concentrate recycling device according to claim 4, characterized in that: The outer tube assembly (4) includes an outer tube (41) installed outside the inner tube (21). A set of positioning plates (47) connected to the inner tube (21) are symmetrically installed on the inner wall of the outer tube (41), dividing the area between the inner tube (21) and the outer tube (41) into upper and lower cavities, corresponding to the upper cavity (14) and the lower cavity (15).

6. The anti-scaling reverse osmosis concentrate recycling device according to claim 5, characterized in that: Both the upper cavity (14) and the lower cavity (15) are provided with a set of arc-shaped pressure plates (42) that are slidably connected to the inner wall of the inner sleeve (21). The distance between the two arc-shaped pressure plates (42) is less than the distance between the two flow holes (27) in the same cavity. When one arc-shaped pressure plate (42) in the same set blocks the flow hole (27), the other arc-shaped pressure plate (42) does not block the flow hole (27). The two arc-shaped pressure plates (42) in the same cavity are jointly equipped with a support frame (43) on their sides.

7. The anti-scaling reverse osmosis concentrate recycling device according to claim 6, characterized in that: A drive motor (44) is installed at one end of the inner sleeve (21), and a driven gear (45) is installed at the drive end of the drive motor (44). The end of the support frame (43) near the driven gear (45) extends to the outside of the outer sleeve (41) and is equipped with a matching rack (46) that meshes with the driven gear (45).

8. The anti-scaling reverse osmosis concentrate recycling device according to claim 7, characterized in that: All the outer tubes (41) at each level have an upper cavity (14) connected to a common adapter tube (10), and all the adapter tubes (10) have a common inlet tube (11) for inlet concentrated water installed at their ends. All the outer tubes (41) at each level have a lower cavity (15) connected to a common drain tube (13), and all the drain tubes (13) have a common outlet tube (12) for outlet clean water installed at their ends.

9. A recycling method using the anti-scaling reverse osmosis concentrate recycling device as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Concentrated water permeation: Concentrated water is introduced into the inner tube assembly (2) to permeate it; S2. Change direction, and after a predetermined time, change the direction of concentrated water in the inner sleeve (21) through the outer pipe assembly (4); S3. Internal cleaning: Clean the reverse osmosis membrane (24) after a fixed period of use of the device.

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