MBR membrane in-situ cleaning device and membrane frame

Abstract

The utility model discloses an MBR (Membrane Bioreactor) membrane in-situ cleaning device and a membrane frame. The MBR membrane in-situ cleaning device comprises a main frame, a cleaning assembly and a mobile platform, the main frame is of a three-dimensional structure, a positioning polish rod and a lead screw are arranged on the main frame, the lead screw is connected with a servo motor, the positioning polish rod and the lead screw penetrate through the movable platform and are detachably fixed to the main frame, and the movable platform can freely move on the polish rod and the lead screw; the cleaning assembly comprises a cleaning head and a connecting rod, the cleaning head is of a hollow structure and is provided with a water spraying opening, the connecting rod is of a hollow structure, the cleaning head is communicated with the connecting rod, the movable platform is provided with a through hole, and the connecting rod can penetrate through the through hole and is connected with the water distribution pipe; one end of the water pump is connected with the water suction pipe, and the other end of the water pump is connected with the water distribution pipe. In-situ online cleaning can be carried out under the state that the system is not shut down and does not need to be disassembled, the cleaning efficiency is greatly improved, the labor intensity is reduced, meanwhile, the water consumption is reduced, and the energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of in-situ cleaning of MBR membranes, specifically to an in-situ cleaning device and membrane holder for MBR membranes. Background Technology

[0002] MBR, also known as membrane bioreactor, is a new type of water treatment technology that combines membrane separation units with biological treatment units. It mainly utilizes activated sludge and macromolecular organic matter in the interception tank of the MBR membrane module immersed in the aerobic biological tank. Due to its effective interception effect, it can retain microorganisms with long generation cycles, thereby achieving deep purification of wastewater.

[0003] Membrane fouling has consistently been a major obstacle to the development of membrane separation technology during MBR membrane operation. High sludge concentrations during MBR operation lead to sludge buildup on the membrane surface, especially at the root ends, causing fouling. Currently, aeration devices are installed below the MBR membrane to remove contaminants from the membrane fibers. However, when aeration fails, sludge easily forms cakes on the fiber surface, resulting in irreversible fouling. Furthermore, extracellular polymers and other contaminants readily form a robust filter cake layer on the fiber surface, which is difficult to remove through aeration. When MBR membrane fibers cake or become irreversibly fouled, the only solution is usually to remove the curtain membrane module from the membrane frame for washing. This process is cumbersome, time-consuming, labor-intensive, and involves a large workload, severely impacting cleaning efficiency.

[0004] Chinese Patent No. 2021220753235 discloses an in-situ cleaning tool for MBR membranes, including a cleaning tube and a handle. The handle is fixedly installed at the end of the cleaning tube and is connected to the cleaning tube. An end spray hole is provided at the end of the cleaning tube away from the handle, and side spray holes are provided on both sides of the cleaning tube near the end spray hole. The handle is a telescopic structure, including an outer pipe and an inner pipe, with a sealing device fixedly installed at the upper end of the inner pipe. Although this patent can achieve in-situ cleaning, the actual membrane frame is approximately 2 meters high, and the cleaning tube needs to extend from the upper end of the membrane frame to the lower end for cleaning. This is difficult to achieve using only a handle, and its operability needs further verification. Summary of the Invention

[0005] Technical Problem: To solve the above problems, this utility model provides an MBR membrane in-situ cleaning device and membrane frame, which can realize in-situ online cleaning. That is, when the MBR membrane is clogged, there is no need to remove the curtain membrane from the membrane frame for rinsing, which greatly reduces the workload, improves cleaning efficiency, and is simple and easy to implement.

[0006] This invention uses water from the original membrane tank for cleaning, thus saving water consumption.

[0007] The in-situ cleaning device provided by this utility model has a simple structure, is detachable, and is easy to maintain; when cleaning MBR membranes, the mechanical structure of the in-situ cleaning device is all above the water surface, making it less prone to damage.

[0008] This invention uses high-pressure water impact to break up large pieces of mud on the surface of the MBR membrane, resulting in good cleaning effect, strong anti-fouling performance, and at the same time, it can reduce aeration volume and save energy.

[0009] This utility model has a cleverly designed structure that allows for quick and easy installation and fixation with an MBR membrane frame.

[0010] Technical Solution: To solve the above technical problems, this utility model provides an MBR membrane in-situ cleaning device, including a main frame, a cleaning assembly, and a moving platform; the main frame is a three-dimensional structure, and a positioning light rod and a lead screw are provided on the main frame. The lead screw is connected to a servo motor. The positioning light rod and the lead screw pass through the moving platform and are detachably fixed to the main frame. A slider is provided on the lead screw, and the slider is located below the moving platform. The inner ring of the slider is threaded to match the lead screw. The moving platform can move on the slider and the lead screw, and the position of the moving platform is controlled by the slider on the lead screw.

[0011] The cleaning assembly includes a cleaning head and a connecting rod. The cleaning head is a hollow structure with spray nozzles on the side and bottom. The cleaning head is preferably a hollow cylindrical structure to prevent damage to the membrane fibers during operation. The connecting rod is also hollow. The cleaning head and the connecting rod are connected. The cleaning fluid is transported from the connecting rod to the cleaning head and sprayed out from the spray nozzles of the cleaning head. High-pressure water is used to impact and break up the mud or filter cake layer on the surface of the MBR membrane that is not easily removed by air scrubbing.

[0012] The mobile platform is provided with through holes, the diameter, number, and shape of which match the connecting rods to ensure that the connecting rods of the cleaning assembly can pass through the through holes of the mobile platform and connect to the water distribution pipe. A water pump is provided on the mobile platform, with one end connected to the suction pipe and the other end connected to the water distribution pipe, which is located above the mobile platform. The mobile platform, cleaning assembly, water pump, and suction pipe constitute a single mobile unit that moves together with the mobile platform on the main frame.

[0013] Furthermore, the number of cleaning components is ≥1, and they can be arranged in a single row or in multiple rows side by side.

[0014] Furthermore, the water distribution pipe is composed of multiple tees connected in series, making it easier to disassemble and perform partial maintenance.

[0015] Furthermore, the bottom of the main frame is provided with positioning pins and limiting pins.

[0016] Furthermore, the positioning pin is cylindrical, which facilitates matching with the membrane frame and enables rapid positioning.

[0017] Furthermore, the limiting pin is a straight pin, which can prevent the cleaning device from tipping over due to impact during the cleaning process.

[0018] Furthermore, the single-shaped limiting pins are located on the same side and are connected to the connecting rods respectively. The connecting rods are connected to the rotary cylinders through the turntable and the rotating shaft. By controlling the rotary cylinders, the extension or retraction of the single-shaped limiting pins can be controlled, which facilitates installation and disassembly.

[0019] Furthermore, a filter device, preferably a filter screen, is provided at the water inlet of the suction pipe to filter impurities in the cleaning water.

[0020] Furthermore, the water suction pipe is equipped with an air inlet pipe, which is connected to an air intake device and is used to remove impurities adsorbed on the filter device.

[0021] This utility model also provides an MBR membrane holder, which is used in conjunction with the aforementioned MBR membrane in-situ cleaning device. The MBR membrane holder has a square three-dimensional structure, and limiting plates are provided on the upper supports on both sides of the membrane holder. The limiting plates are provided with limiting grooves and limiting holes.

[0022] Furthermore, the limiting groove and limiting hole are matched with the positioning pin and limiting pin of the in-situ cleaning device.

[0023] Furthermore, the limiting groove has a V-shaped structure.

[0024] Furthermore, the limiting hole has a straight-line structure.

[0025] This utility model also provides an in-situ cleaning method, including:

[0026] S1 hoist the in-situ cleaning device above the MBR membrane frame, place the limiting pin into the limiting groove of the MBR membrane frame, start the rotary cylinder, the rotary cylinder drives the rotating shaft to rotate, and then pushes the connecting rod to move, inserting the straight limiting pin into the straight limiting hole of the MBR membrane frame limiting plate;

[0027] After S2 fixes the in-situ cleaning device to the MBR membrane frame, the water pump and servo motor are turned on. The servo motor drives the lead screw to rotate, and the moving platform moves down with the rotation of the lead screw. At the same time, under the action of the water pump, the cleaning water is transported to the cleaning component through the water distribution pipe, and the MBR membrane is rinsed with high pressure water through the cleaning head.

[0028] After S3 cleaning is completed, change the direction of the servo motor to restore the cleaning component to its original position, move the position of the original cleaning device, and repeat the S1-S3 operation to clean the remaining MBR membranes until all MBR membranes are cleaned.

[0029] S4 restores the cleaning components to their original positions and removes the in-situ cleaning device.

[0030] Beneficial effects: Compared with the prior art, the technical solution of this utility model has the following beneficial effects: After the in-situ cleaning device provided by this utility model is fixed with the MBR membrane frame, the cleaning component can be inserted into the space between the two MBR membranes for high-pressure water rinsing under mechanical action. There is no need to stop the system operation, no need to lift the MBR membrane frame out of the membrane tank, and no need to extract the water in the membrane tank. The cleaning effect is good, and the operation is simple and easy to implement.

[0031] This invention features a filter device at the end of the suction pipe, allowing direct use of water from the membrane tank for rinsing, thus saving water.

[0032] This invention features a fixed pin, a straight-line limiting pin, and a rotating mechanism at the bottom of the in-situ cleaning device, and a limiting groove and a limiting hole on the MBR membrane frame. This allows for quick and easy installation of the in-situ cleaning device together with the MBR membrane frame, and the straight-line limiting pin prevents the cleaning device from tipping over due to impact during the cleaning process.

[0033] When using the in-situ cleaning device provided by this utility model, the in-situ cleaning device is placed on the MBR membrane frame, with only the cleaning components extending into the MBR. All mechanical structures are above the water surface, so the mechanical structures are not easily corroded or damaged.

[0034] The in-situ cleaning device provided by this utility model has a simple structure and is detachable, making it convenient for daily maintenance. Attached Figure Description

[0035] Figure 1 This is a three-dimensional schematic diagram of an in-situ cleaning device according to an embodiment of the present invention.

[0036] Figure 2 This is a front view of an in-situ cleaning device according to an embodiment of this utility model.

[0037] Figure 3 This is a top view of an embodiment of the in-situ cleaning device of this utility model.

[0038] Figure 4 This is a schematic diagram of an in-situ cleaning component according to an embodiment of the present invention.

[0039] Figure 5 This is a utility model Figure 4 Enlarged view of the cleaning head (point B).

[0040] Figure 6 This is a left view of the main frame of an in-situ cleaning device according to an embodiment of this utility model.

[0041] Figure 7 This is a utility model Figure 5Cross-sectional view of the retracted state of the I-shaped limit pin.

[0042] Figure 8 This is a utility model Figure 5 Cross-sectional view of the extended position of the I-shaped limit pin.

[0043] Figure 9 This is a schematic diagram of the membrane frame structure in one embodiment of the present invention.

[0044] Figure 10 yes Figure 9 Enlarged view of section I in the middle.

[0045] Figure 11 This is a schematic diagram of the in-situ cleaning device and membrane frame assembly in this utility model.

[0046] Figure 12 yes Figure 10 Enlarged view of section H in the middle.

[0047] Figure 13 It is the state in which the cleaning component in the in-situ information device has been displaced to the middle of the membrane frame.

[0048] Figure 14 It is the state where the cleaning component in the in-situ information device has moved to the bottom of the membrane frame.

[0049] Figure 15 yes Figure 1 Enlarged view of the center positioning pin (point B).

[0050] Figure 16 yes Figure 1 Enlarged view of the middle limit pin (point A).

[0051] Figure 17 yes Figure 1 Enlarged view of the middle filter device (point C).

[0052] The diagram shows: 1. Main frame; 2. Positioning rod; 3. Cleaning assembly; 4. Moving platform plate; 5. Lead screw; 6. Lead screw linkage shaft; 7. Rotary cylinder; 8. Servo motor; 9. Water distribution pipe; 10. Air inlet pipe; 11. Water pump; 12. Water suction pipe; 13. Filter device; 14. Slider; 15. Positioning pin; 16. Limiting pin; 17. Connecting rod; 18. Cleaning head; 19. Spray nozzle; 20. Rotating shaft; 21. Connecting rod; 22. Turntable; 23. Limiting sleeve; 24. Limiting plate; 25. Limiting groove; 26. Limiting hole. Detailed Implementation

[0053] The technical solution of this utility model will now be described in detail with reference to the accompanying drawings.

[0054] like Figure 1-17This utility model provides an in-situ cleaning device for MBR membranes, including a main frame 1, a cleaning component 3, and a moving platform 4; the main frame 1 is a three-dimensional structure, preferably a cuboid or cube structure, and the main frame 1 is provided with a positioning light rod 2 and a lead screw 5. The lead screw 5 is connected to a servo motor 8. The positioning light rod 2 and the lead screw 5 pass through the moving platform 4 and can be detachably fixed to the main frame 1. The moving platform can move freely on the light rod and the lead screw.

[0055] In one embodiment, two lead screws 5 are provided, and the two lead screws 5 are connected by a lead screw linkage shaft 6.

[0056] The cleaning assembly 3 includes a cleaning head 18 and a connecting rod 17. The cleaning head 18 is a hollow structure with spray nozzles 19 on the side and bottom. The cleaning head 18 is preferably a hollow cylindrical structure to avoid damaging the membrane fibers when cleaning the MBR membrane. The connecting rod 17 is a hollow structure. The cleaning head 18 and the connecting rod 17 are connected. The cleaning liquid (or water) is transported from the connecting rod 17 to the cleaning head 18 and sprayed out from the spray nozzles 19 of the cleaning head 18. High-pressure water impact is used to clean the mud on the surface of the MBR membrane.

[0057] The number of the cleaning components 3 is ≥1, and they can be set in one row or multiple rows in parallel, and can clean one or more groups of MBR membranes at the same time.

[0058] In one embodiment, as Figure 1-3 In this configuration, the cleaning components are arranged in three rows, allowing for the simultaneous cleaning of three sets of MBR membranes.

[0059] The mobile platform 4 is provided with through holes, the diameter, number, and shape of which match the connecting rod 17 to ensure that the connecting rod 17 can pass through the through holes of the mobile platform 4. The mobile platform 4 is provided with a water pump 11, one end of which is connected to the suction pipe 12 and the other end to the distribution pipe 9. The connecting rod 17 of the cleaning component 3 passes through the through holes of the mobile platform 4 and is connected to the distribution pipe 9. The distribution pipe 9 is located above the mobile platform 4. The mobile platform 4, the cleaning component 3, the distribution pipe 9, the water pump 11, and the suction pipe 12 form a whole and can move up and down along the positioning light rod 2.

[0060] In one embodiment, the water distribution pipe 9 is composed of multiple T-shaped pipes, which facilitates assembly and disassembly.

[0061] The lead screw 5 is equipped with a slider 14 located below the moving platform 4. The inner ring of the slider 14 has a thread that matches the lead screw, providing a limiting function for the moving platform 4. After the servo motor 8 is turned on, the servo motor 8 drives the lead screw 5 to rotate, thereby causing the slider 14 to move on the lead screw 5, and the moving platform 4 moves accordingly.

[0062] In one embodiment, a filter device 13 is provided at the inlet of the water distribution pipe 9 to filter impurities in the cleaning water. Furthermore, water in the membrane tank can be directly drawn for cleaning.

[0063] In one embodiment, the filtering device 13 is a filter screen.

[0064] In one embodiment, the bottom of the main frame 1 is provided with a positioning pin 15 and a limiting pin 16. The positioning pin is cylindrical, which facilitates quick positioning. The limiting pin is a straight pin, which is not easy to fall off after matching and limiting the hole.

[0065] In one embodiment, the straight-line limiting pins 16 are located on the same side and are connected to the connecting rods 21 respectively. The connecting rods 21 are connected to the rotary cylinder 7 through the turntable 22 and the rotating shaft 20.

[0066] In one embodiment, the water suction pipe 12 is provided with an air inlet pipe 10, which is connected to an air intake device. When the water suction pipe 12 is clogged, the air intake device is turned on, and air is blown into the water suction pipe through the air inlet pipe 10 to remove impurities outside the filter screen.

[0067] This utility model also provides an MBR membrane holder, which can be used in conjunction with the aforementioned MBR membrane in-situ cleaning device. The MBR membrane holder has a square three-dimensional structure, and limiting plates 24 are provided on the upper supports on both sides of the membrane holder. The limiting plates 24 are provided with limiting grooves 25 and limiting holes 26. Further, the limiting grooves and limiting holes are matched with the positioning pins and limiting pins of the in-situ cleaning device.

[0068] In one embodiment, the limiting groove is a V-shaped structure.

[0069] In one embodiment, the limiting hole is a straight-line structure.

[0070] This utility model also provides an in-situ cleaning method, including:

[0071] S1 hoist the in-situ cleaning device above the MBR membrane frame, place the limiting pin into the limiting groove of the MBR membrane frame, start the rotary cylinder, the rotary cylinder drives the rotating shaft to rotate, and then pushes the connecting rod to move, inserting the straight limiting pin into the straight limiting hole of the MBR membrane frame limiting plate;

[0072] After S2 fixes the in-situ cleaning device to the MBR membrane frame, the water pump and servo motor are turned on. The servo motor drives the lead screw to rotate, and the moving platform moves down with the rotation of the lead screw. At the same time, under the action of the water pump, the cleaning water is transported to the cleaning component through the water distribution pipe, and the MBR membrane is rinsed with high pressure water through the cleaning head.

[0073] After S3 cleaning is completed, change the direction of the servo motor to restore the cleaning component to its original position, move the position of the original cleaning device, and repeat the S1-S3 operation to clean the remaining MBR membranes until all MBR membranes are cleaned.

[0074] S4 restores the cleaning components to their original positions and removes the in-situ cleaning device.

[0075] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. The specific embodiments and descriptions in the specification are merely for further illustrating the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. An MBR membrane in-situ cleaning device, characterized in that, Including main frame (1), cleaning assembly (3) and mobile platform (4);The main frame (1) is three-dimensional structure, and the main frame (1) is equipped with positioning light pole (2), screw rod (5), the screw rod (5) is connected with servo motor (8), the positioning light pole (2), screw rod (5) pass through mobile platform (4) and with main frame (1) can be detachably fixed, the mobile platform (4) can be freely moved on positioning light pole (2) and screw rod (5); The screw rod (5) is equipped with sliding block (14), and the sliding block (14) is located below the mobile platform (4), and the inner ring of the sliding block (14) is provided with threads matched with the screw rod (5); The cleaning assembly (3) includes cleaning head (18) and connecting rod (17), the cleaning head (18) is hollow structure and is provided with water jet (19) on side and bottom, the connecting rod (17) is hollow structure, the cleaning head (18) and connecting rod (17) are communicated, cleaning fluid is transported from connecting rod (17) to cleaning head (18), and is sprayed from water jet (19) of cleaning head, and mud on the surface of MBR membrane is impacted and removed by high-pressure water, or filter cake layer attached to the surface of membrane is not easily removed by air scrubbing; The mobile platform (4) is provided with a plurality of through holes, the aperture, number and shape of the through holes are matched with the connecting rod (17), so that the connecting rod (17) can pass through the through hole;The mobile platform (4) is provided with water pump (11), one end of the water pump (11) is connected with suction pipe (12), and the other end is connected with water distribution pipe (9); The connecting rod (17) of the cleaning assembly passes through the through hole of the mobile platform (4) and is connected with the water distribution pipe (9);The water distribution pipe (9) is above the mobile platform (4).

2. A device for in-situ cleaning of MBR membranes according to claim 1, characterized in that, The number of the cleaning assembly is greater than or equal to 1.

3. The MBR membrane in-situ cleaning device according to claim 1, characterized in that, The water distribution pipe is composed of a plurality of three-way pipes connected in series.

4. The MBR membrane in-situ cleaning device according to claim 1, characterized in that, The main frame is provided with positioning pin and limiting pin at the bottom.

5. A device for in-situ cleaning of MBR membranes according to claim 4, characterized in that, The positioning pin is cylindrical.

6. A device for in-situ cleaning of MBR membranes according to claim 4, characterized in that, The limiting pin is a one-letter type limiting pin.

7. A device for in-situ cleaning of MBR membranes according to claim 6, characterized in that, The one-letter type limiting pins are located on the same side and are connected with connecting rods respectively, and the connecting rods are connected with rotary air cylinders through rotary table and rotating shaft.

8. The MBR membrane in-situ cleaning device according to claim 1, characterized in that, The suction pipe is provided with filter device at water inlet, which is used for filtering impurities in cleaning water.

9. The MBR membrane in-situ cleaning device according to claim 1, characterized in that, The suction pipe is provided with air inlet pipe, which is connected with air inlet device, and is used for removing impurities adsorbed on the filter device.

10. An MBR membrane rack characterized by, The MBR membrane rack is matched with the MBR membrane in situ cleaning device of any one of claims 1-9 for use, and the MBR membrane rack is square three-dimensional structure, and the upper support of both sides of the membrane rack is provided with limiting plate, the limiting plate is provided with limiting groove and limiting hole, and the limiting groove and limiting hole are matched with the positioning pin and limiting pin of the in situ cleaning device.

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