RO membrane device with online cleaning function

Abstract

The application discloses a RO membrane device with an online cleaning function and relates to the technical field of reverse osmosis membranes. The water purification tank is internally divided into a water inlet section, a filtering section and a water outlet section which are sequentially connected. A plurality of filter cartridges are installed in the filtering section, a filter core is installed in each filter cartridge, and a wastewater outlet and a one-way valve are arranged on the side surfaces of the two ends of each filter cartridge. A cleaning structure is installed in the middle of the filtering section. The cleaning structure comprises a rotating shaft which is rotatably installed in the middle of the filtering section. A support frame parallel to the rotating shaft is installed on one side of the rotating shaft. The support frame is connected to the rotating shaft through an extension rod. A plug-in connector corresponding to the wastewater outlet and a quick connector corresponding to the one-way valve are installed at the two ends of the support frame. The device can quickly and efficiently clean the RO membrane filter core. The device can continuously and stably output purified water while being cleaned. The device can meet the requirements of equipment use.

Description

Technical Field

[0001] The invention relates to the technical field of reverse osmosis membranes, in particular to an RO membrane device with an online cleaning function. Background Art

[0002] RO membranes, or reverse osmosis membranes, typically flow from low to high concentrations. Once pressurized, water flows from high to low concentrations, a process known as reverse osmosis. Because the pore size of an RO membrane is one millionth that of a human hair, invisible to the naked eye and 5,000 times that of bacteria and viruses, only water molecules and some mineral ions can pass through, while other impurities and heavy metals are discharged through the wastewater pipe. This method is used in all desalination processes and in astronaut wastewater recycling, leading to the RO membrane being called a high-tech "artificial kidney" outside the body.

[0003] Reverse osmosis is a new membrane separation technology that relies on a reverse osmosis membrane to separate the solvent from the solute in a solution under pressure. Currently, reverse osmosis membranes are widely used in water purification. Reverse osmosis membranes are typically manufactured as cylindrical filter elements. Water to be purified passes through the membrane from one end. During this process, impurities and heavy metal ions are retained within the membrane, while the purified water is discharged from the center. Due to the purification principle of reverse osmosis membranes, they will inevitably become clogged over time, resulting in a decrease in water output. Therefore, regular cleaning is necessary.

[0004] Reverse osmosis membranes can be cleaned physically using clean water or a soft brush, or chemically using a special cleaning agent for repeated rinsing. Online cleaning of RO membranes generally involves chemical cleaning. First, close the water inlet and outlet of the water purifier, connect the cleaning equipment, and repeatedly rinse the filter element with diluted cleaning agent. Then, rinse with clean water until no cleaning agent remains. Reconnect the water inlet and outlet and continue using the filter. Although online cleaning equipment can complete the cleaning process without removing the filter element, it still requires downtime, and the cleaning process may take several hours. This can result in a disruption in the supply of clean water during cleaning, causing inconvenience. Summary of the Invention

[0005] The present invention aims to provide an RO membrane device with online cleaning capabilities to address the problems identified in the aforementioned background art. The present invention proposes an RO membrane filtration device capable of online automatic cleaning, which can fully and automatically clean the RO membrane without shutting down the system, maintaining a long-term, stable, and efficient supply of purified water.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An RO membrane device with an online cleaning function comprises a clean water tank and a cleaning tank; the clean water tank is divided into a water inlet section, a filtration section and a water outlet section which are connected in sequence, a drive box and a liquid inlet box are provided in the middle of the water inlet section, and a liquid outlet box is provided in the middle of the water outlet section; a plurality of filter cartridges distributed in an annular manner are installed in the filtration section, a filter element is installed in the filter cartridge, and waste water outlets and one-way valves are respectively provided on the side surfaces at both ends of the filter cartridge; a cleaning structure is installed in the middle of the filtration section, and the cleaning structure comprises a rotating shaft rotatably installed in the middle of the filtration section, and both ends of the rotating shaft are respectively inserted into the liquid inlet box and the liquid outlet box; a support frame parallel to the rotating shaft is installed on one side of the rotating shaft, the support frame is connected to the rotating shaft by a telescopic rod, and a plug connector corresponding to the waste water outlet and a quick connector corresponding to the one-way valve are respectively installed at both ends of the support frame;

[0008] A driving structure is installed in the driving box, the driving structure is connected to the rotating shaft, and the driving structure controls the rotation of the rotating shaft;

[0009] The cleaning liquid enters the interior of the rotating shaft from the liquid inlet box, passes into the corresponding filter cartridge through the mutually connected plug connector and wastewater outlet, flushes the filter element, and then enters the interior of the rotating shaft again from the matching one-way valve and quick connector to be discharged from the liquid outlet box.

[0010] As a further solution of the present invention: one side of the clean water tank is fixedly connected to the cleaning tank, support legs are respectively installed on the outside of the clean water tank and the cleaning tank, and a circulating pump is installed on the cleaning tank.

[0011] As a further solution of the present invention: a water pump is installed on the water inlet section, the water pump is connected to the water inlet valve, a water outlet valve is installed on the water outlet section, and a wastewater ratio solenoid valve is installed outside the filter section.

[0012] As a further solution of the present invention: a flushing valve is installed on the liquid inlet box, a liquid outlet valve is installed on the liquid outlet box, the water inlet valve is connected to the circulation pump through a cleaning liquid pipe, and the water outlet valve is connected to the cleaning tank through a cleaning liquid pipe.

[0013] As a further solution of the present invention: the plug connector and the quick connector are respectively connected to the rotating shaft through hoses, a liquid inlet pipe connecting the plug connector and the liquid inlet box is opened inside the rotating shaft, a liquid outlet pipe connecting the quick connector and the liquid outlet box is opened inside the rotating shaft, and a plurality of transverse mounting holes are opened inside the rotating shaft, and one end of the telescopic rod is inserted into the mounting hole and fixedly connected to the rotating shaft.

[0014] As a further solution of the present invention: a water inlet hole is opened between the filter cartridge and the water inlet section, and a water outlet hole is opened between the filter cartridge and the water outlet section.

[0015] As a further solution of the present invention: the drive box is located between the liquid inlet box and the filter section, the rotating shaft passes through the drive box, the driving structure includes a motor, the motor is connected to the driving gear, a transmission gear is fixedly mounted on the rotating shaft, and the drive gear and the transmission gear are engaged with each other.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The RO membrane device with online cleaning function is adopted. The device divides the clean water tank into three sections. The initial water to be purified evenly enters each filter cartridge of the filtration section from the water inlet section. After being filtered by the filter element, the purified water is collected in the water outlet section and discharged. The wastewater generated during the purification process enters the space of the filtration section through the wastewater port on the filter cartridge and is finally discharged from the wastewater ratio solenoid valve. The device uses multiple filter elements to complete the water purification work together. The connection method is simple and there is no need to set up a complex valve control system for each filter element. It is simple and convenient to use.

[0018] Using the above-mentioned RO membrane device with online cleaning function, when cleaning is needed, the device rotates the shaft to make the support frame point to one of the filter cartridges, the support frame is pushed outward, the one-way valve is connected to the quick connector, and the plug connector is connected to the wastewater outlet. The cleaning liquid entering from the liquid inlet box is poured into the filter cartridge, passes through the filter element, and enters the liquid outlet box again from the wastewater outlet to be discharged. The corresponding filter element is restored to cleanliness through the circulating flushing of the cleaning liquid, and the filter cartridge being cleaned is in a fully closed state. Therefore, it does not affect the other filter cartridges to continue to purify water. While cleaning, normal clean water supply can also be maintained, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the appearance structure of an RO membrane device with online cleaning function.

[0020] Figure 2 This is a schematic diagram of the front structure of the clean water tank in the RO membrane device with online cleaning function.

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the water inlet tank in an RO membrane device with online cleaning function.

[0022] Figure 4 It is a schematic structural diagram of an oblique cross section of the filtration section in an RO membrane device with an online cleaning function.

[0023] Figure 5 This is a schematic diagram of the structure of the rotating shaft and filter cartridge in an RO membrane device with online cleaning function.

[0024] Figure 6 This is a schematic diagram of the structure of the water inlet section of an RO membrane device with online cleaning function.

[0025] In the figure: 1, clean water tank; 11, filter section; 111, wastewater ratio solenoid valve; 12, water inlet section; 121, water pump; 122, water inlet valve; 13, water outlet section; 131, water outlet valve; 14, liquid outlet box; 141, liquid outlet valve; 15, liquid inlet box; 151, flushing valve; 16, filter cartridge; 161, water outlet hole; 162, wastewater outlet; 163, one-way valve; 164, water inlet hole; 165, filter Core; 17, drive box; 2, cleaning box; 21, cleaning liquid pipe; 22, circulation pump; 23, support leg; 3, cleaning structure; 31, rotating shaft; 311, liquid inlet pipe; 312, liquid outlet pipe; 313, mounting hole; 32, support frame; 33, quick connector; 34, plug connector; 35, hose; 36, telescopic rod; 4, driving structure; 41, transmission gear; 42, driving gear; 43, motor. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1 to 6 In an embodiment of the present invention, an RO membrane device with an online cleaning function includes a clean water tank 1 and a cleaning tank 2; the clean water tank 1 is divided into a water inlet section 12, a filtration section 11 and a water outlet section 13 connected in sequence, a drive box 17 and a liquid inlet box 15 are provided in the middle of the water inlet section 12, and a liquid outlet box 14 is provided in the middle of the water outlet section 13; a plurality of filter cartridges 16 distributed in an annular manner are installed in the filtration section 11, a filter element 165 is installed in the filter cartridge 16, and waste water is respectively installed on the sides of both ends of the filter cartridge 16. A water inlet 162 and a one-way valve 163; a cleaning structure 3 is installed in the middle of the filter section 11, and the cleaning structure 3 includes a rotating shaft 31 rotatably installed in the middle of the filter section 11, and the ends of the rotating shaft 31 are respectively inserted into the liquid inlet box 15 and the liquid outlet box 14; a support frame 32 is installed on one side of the rotating shaft 31 and is parallel to the rotating shaft 31. The support frame 32 is connected to the rotating shaft 31 by a telescopic rod 36, and a plug connector 34 corresponding to the wastewater outlet 162 and a quick connector 33 corresponding to the one-way valve 163 are respectively installed at both ends of the support frame 32;

[0028] The drive box 17 is provided with a drive structure 4, which is connected to the rotating shaft 31 and controls the rotation of the rotating shaft 31.

[0029] The cleaning liquid enters the interior of the rotating shaft 31 from the liquid inlet box 15, passes into the corresponding filter cartridge 16 through the mutually interpenetrating plug connector 34 and the wastewater outlet 162, flushes the filter element 165, and then enters the interior of the rotating shaft 31 again from the matching one-way valve 163 and the quick connector 33, and reaches the liquid outlet box 14 for discharge.

[0030] This device uses a clean water tank 1 to complete the water purification process. After the initial water to be filtered enters the water inlet section 12, it evenly enters the interior of each filter cartridge 16 from the water inlet section 12. After being filtered by the internal filter element 165, the purified water reaches the water outlet section 13 at the other end and is discharged from the water outlet section 13. The concentrated water generated during the filtration process enters the space outside the filter cartridge 16 on the filter section 11 from the wastewater outlet 162 and is finally discharged from the wastewater ratio solenoid valve 111. In addition to the clean water tank 1 body, the water purification system may also be equipped with components such as a water tank for storing clean water and a faucet for draining water, or equipment for water pressure monitoring and water quality testing, etc. However, these devices are only auxiliary equipment of this device and are not subject to additional restrictions.

[0031] The wastewater outlet 162 is located on the filter cartridge 16 at one end close to the water outlet section 13 , while the one-way valve 163 is located at one end close to the water inlet section 12 . The one-way valve 163 only allows external water to enter the filter cartridge 16 without draining water.

[0032] During cleaning, the cleaning liquid is diluted and mixed in the cleaning box 2. The two ends of the cleaning box 2 are respectively connected to the liquid inlet box 15 and the liquid outlet box 14, and the cleaning box 2 provides a circulation drive. The rotating shaft 31 is rotated so that the support frame 32 is facing one of the filter cartridges 16, that is, the quick connector 33 is coaxially aligned with the corresponding one-way valve 163, and the plug connector 34 is coaxially aligned with the corresponding wastewater outlet 162. The telescopic rod 36 is used to push the support frame 32 outward, and the quick structure is inserted into the port of the one-way valve 163, and the plug connector 34 is sleeved on the wastewater outlet 162, forming a closed-loop circulation circuit involving the filter cartridge 16. The cleaning liquid enters from the liquid inlet box 15, enters the filter cartridge 16 through the conduction of the rotating shaft 31, reaches the wastewater outlet 162 after passing through the filter element 165, and is then discharged into the liquid outlet box 14 and returned to the cleaning box 2, forming a circulating flushing system to achieve the purpose of cleaning the designated filter element 165.

[0033] During this process, the cleaned filter cartridge 16 is in the circulation of the cleaning structure 3, and the circulating cleaning liquid is not connected to other parts of the entire water purification tank 1, so it does not affect the normal processing of raw water purification by other filter cartridges 16, thereby achieving the effect of online cleaning of the RO membrane without affecting the normal operation of the water purification equipment during cleaning.

[0034] The quick connector 33 used in the device belongs to a generic name, that is, a structure that can be separated into a male plug and a female plug, and in the separated state, both parts are in a closed state, and after connection, the pipeline can be connected to each other. Various quick connectors 33 can meet the use requirements of the device, so the form of the quick connector 33 is not limited. In order to achieve the purpose of plugging control, one of the male plug or the female plug can be selected to be installed on the support frame 32, and the other is installed at the port of the one-way valve 163, to achieve the effect of locking after pulling out and conducting after plugging.

[0035] As another embodiment of the present application, please refer to Figure 1 , one side of the water purification tank 1 is fixedly connected with the cleaning tank 2, support legs 23 are respectively installed outside the water purification tank 1 and the cleaning tank 2, and a circulating pump 22 is installed on the cleaning tank 2. The cleaning tank 2 is installed in cooperation with the water purification tank 1, the support legs 23 at the bottom can be replaced by a required support frame, and the circulating pump 22 is used to circulate the cleaning liquid. The cleaning tank 2 is used to contain the diluted cleaning agent, and a structure for stirring can be selected to be installed inside, in addition to this, the basic part of the cleaning tank 2 should also include a water inlet, a drain and a tank cover, etc. so as to replace the cleaning liquid with pure water in the later stage of the cleaning process. Since this part of the structure belongs to the inherent structure of the cleaning tank 2, excessive restrictive description is not made.

[0036] Please refer to Figures 1 to 3 , a water pump 121 is installed on the water inlet section 12, the water pump 121 is connected with a water inlet valve 122, a water outlet valve 131 is installed on the water outlet section 13, and a waste water ratio electromagnetic valve 111 is installed outside the filter section 11. The water pump 121 is used to pressurize the original water, and the reverse osmosis type water purification is realized by using the pressure difference, the water outlet valve 131 is used to control the drainage, and the waste water ratio electromagnetic valve 111 is used to control the discharge ratio of the concentrated water.

[0037] Please refer to Figures 1 to 3 , a flushing valve 151 is installed on the liquid inlet box 15, a liquid outlet valve 141 is installed on the liquid outlet box 14, the water inlet valve 122 is connected with the circulating pump 22 through the cleaning liquid pipe 21, and the water outlet valve 131 is connected with the cleaning tank 2 through the cleaning liquid pipe 21. The flushing valve 151 and the liquid outlet valve 141 are respectively used to close the liquid inlet box 15 and the liquid outlet box 14, so as to avoid concentrated water leakage at the liquid inlet box 15 and the liquid outlet box 14. The circulating pump 22 is used to pump the cleaning liquid.

[0038] Please refer to Figures 2 to 5The plug connector 34 and quick connector 33 are connected to the rotating shaft 31 via hoses 35. A liquid inlet pipe 311 is provided within the rotating shaft 31, connecting the plug connector 34 to the liquid inlet box 15. A liquid outlet pipe 312 is provided within the rotating shaft 31, connecting the quick connector 33 to the liquid outlet box 14. The rotating shaft 31 has multiple transverse mounting holes 313, through which one end of the telescopic rod 36 is inserted and fixedly connected to the rotating shaft 31. The hoses 35 allow both the quick connector 33 and the plug connector 34 to move within a certain range. The liquid inlet pipe 311 and the liquid outlet pipe 312 are directly provided within the rotating shaft 31, connecting the liquid inlet box 15 and the liquid outlet box 14 at either end of the rotating shaft 31. The connections between the rotating shaft 31 and the drive box 17, and between the liquid inlet box 15 and the liquid outlet box 14, are all rotary sealed connections. Rotary sealing bearings, etc., can be used to enhance the sealing effect. Even if the actual sealing effect at these structural connections is poor, leakage of concentrated water or cleaning agent will not occur. The mounting hole 313 is used to mount the telescopic rod 36 , which may be a waterproof hydraulic rod, an electric push rod, or other mechanical structures with a telescopic effect.

[0039] See also Figure 2 、 Figure 3 and Figure 6 A water inlet hole 164 is opened between the filter cartridge 16 and the water inlet section 12, and a water outlet hole 161 is opened between the filter cartridge 16 and the water outlet section 13. The water inlet hole 164 and the water outlet hole 161 are respectively located at both ends of the filter cartridge 16 to achieve normal conduction of water flow.

[0040] See also Figure 2 、 Figure 3 and Figure 6 The drive box 17 is located between the liquid inlet box 15 and the filter section 11. The rotating shaft 31 passes through the drive box 17. The drive structure 4 includes a motor 43, which is connected to a drive gear 42. A transmission gear 41 is fixedly mounted on the rotating shaft 31, and the drive gear 42 and the transmission gear 41 are meshed with each other. The drive structure 4 provides rotational drive for the rotating shaft 31. The motor 43 drives the drive gear 42 to rotate. The rotation of the rotating shaft 31 can be controlled by the transmission gear 41. In addition to using an intelligent control system connected to the motor 43 to control the rotation angle, an intermittent indexing mechanism such as a sheave can also be used to control the rotating shaft 31, so that the rotating shaft 31 can stably stop at the position corresponding to each filter cartridge 16.

[0041] The working principle of the present invention is:

[0042] This device uses a clean water tank 1 to purify water. The clean water tank 1 is divided into a water inlet section 12, a filter section 11 and a water outlet section 13 from top to bottom. A plurality of filter cartridges 16 that penetrate the filter section 11 are provided in the filter section 11, and a filter element 165 is installed in the filter cartridge 16. The original water enters from the water inlet section 12, passes through each filter element 165 and is discharged from the water outlet section 13. The concentrated water generated enters the filter section 11 through the wastewater port 162 on the filter cartridge 16 and is then discharged uniformly. A one-way valve 163 is also installed on the side of the filter cartridge 16 at one end away from the wastewater port 162; the filter section 1 A rotatable shaft 31 is mounted in the middle of the device 1. A laterally movable support frame 32 is mounted on one side of the shaft 31. A quick connector 33 is mounted on the support frame 32, which mates with a one-way valve 163, and a plug connector 34 mates with a wastewater outlet 162. The two ends of the shaft 31 are connected to the liquid inlet box 15 and the liquid outlet box 14. The cleaning tank 2 inputs the cleaning liquid into the liquid inlet box 15, which is then guided into the filter cartridge 16 via the shaft 31 and the quick connector 33. After passing through the filter element 165, the liquid is discharged from the wastewater outlet 162 at the other end, re-enters the liquid outlet box 14, and then returns to the cleaning tank 2 for a cyclic cleaning cycle. This device can quickly and efficiently clean clogged RO membrane filter elements 165 without affecting the normal water treatment and purification operations of the equipment. It does not require downtime for cleaning, thus minimizing the impact on equipment operation.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An RO membrane device with online cleaning function, comprising a clean water tank and a cleaning tank; characterized in that: The clean water tank is divided into a water inlet section, a filtration section and a water outlet section which are connected in sequence, a drive box and a liquid inlet box being provided in the middle of the water inlet section, and a liquid outlet box being provided in the middle of the water outlet section; a plurality of filter cartridges distributed in an annular manner are installed in the filtration section, a filter element is installed in the filter cartridge, and waste water outlets and one-way valves are respectively provided on the sides at both ends of the filter cartridge; a cleaning structure is installed in the middle of the filtration section, and the cleaning structure includes a rotating shaft rotatably installed in the middle of the filtration section, and the two ends of the rotating shaft are respectively inserted into the liquid inlet box and the liquid outlet box; a support frame parallel to the rotating shaft is installed on one side of the rotating shaft, the support frame is connected to the rotating shaft by a telescopic rod, and a plug connector corresponding to the waste water outlet and a quick connector corresponding to the one-way valve are respectively installed at both ends of the support frame; A driving structure is installed in the driving box, the driving structure is connected to the rotating shaft, and the driving structure controls the rotation of the rotating shaft; The cleaning liquid enters the interior of the rotating shaft from the liquid inlet box, passes into the corresponding filter cartridge through the mutually connected plug connector and wastewater outlet, flushes the filter element, and then enters the interior of the rotating shaft again from the matching one-way valve and quick connector to be discharged from the liquid outlet box.

2. The RO membrane device with online cleaning function according to claim 1, characterized in that: One side of the clean water tank is fixedly connected to the cleaning tank. Support legs are respectively installed on the outside of the clean water tank and the cleaning tank. A circulating pump is installed on the cleaning tank.

3. The RO membrane device with online cleaning function according to claim 1, characterized in that: A water pump is installed on the water inlet section, and the water pump is connected to the water inlet valve. A water outlet valve is installed on the water outlet section, and a wastewater ratio solenoid valve is installed outside the filter section.

4. The RO membrane device with online cleaning function according to claim 3, characterized in that: A flushing valve is installed on the liquid inlet box, a liquid outlet valve is installed on the liquid outlet box, the water inlet valve is connected to a circulation pump through a cleaning liquid pipe, and the water outlet valve is connected to a cleaning tank through a cleaning liquid pipe.

5. The RO membrane device with online cleaning function according to claim 1, characterized in that: The plug connector and the quick connector are respectively connected to the rotating shaft through hoses. A liquid inlet pipe connecting the plug connector and the liquid inlet box is opened inside the rotating shaft. A liquid outlet pipe connecting the quick connector and the liquid outlet box is opened inside the rotating shaft. A plurality of transverse mounting holes are opened inside the rotating shaft. One end of the telescopic rod is inserted into the mounting hole and fixedly connected to the rotating shaft.

6. The RO membrane device with online cleaning function according to claim 1, characterized in that: A water inlet hole is provided between the filter cartridge and the water inlet section, and a water outlet hole is provided between the filter cartridge and the water outlet section.

7. The RO membrane device with online cleaning function according to claim 1, characterized in that: The drive box is located between the liquid inlet box and the filter section, the rotating shaft passes through the drive box, the driving structure includes a motor, the motor is connected to the driving gear, a transmission gear is fixedly mounted on the rotating shaft, and the driving gear and the transmission gear are meshed with each other.

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