A hydraulically coupled ultrasonic flushing and cleaning device for MBR membranes

Abstract

This invention provides a hydraulically coordinated ultrasonic cleaning device for MBR membranes, applicable to the field of municipal wastewater treatment. The device includes a cleaning tank, ultrasonic transducers, an agitator, a crossbeam, and adjusting rods. An agitator is located at the center of the bottom of the cleaning tank, and ultrasonic transducers are evenly spaced on the outer wall. A drain pipe is connected to the bottom. The crossbeam, with pulleys at both ends, rests on the tank edge, and has positioning plates on it to limit the position of the MBR membrane. The distance between adjacent crossbeams is limited by the adjusting rod. During operation, the agitator stirs the water, creating hydraulic impact, while the ultrasonic transducers generate ultrasonic waves; both work together to clean the MBR membrane. This device features a high degree of automation, improving cleaning efficiency and thoroughness, reducing labor input, and lowering costs. It is suitable for batch cleaning of MBR membranes in wastewater treatment plants.

Description

Technical Field

[0001] This utility model relates to the field of municipal wastewater treatment technology, and in particular to a hydraulically coordinated ultrasonic flushing MBR membrane cleaning device. Background Technology

[0002] In the field of municipal wastewater treatment, the MBR process is widely used due to its highly efficient solid-liquid separation. However, after a period of operation, the accumulation of microbial metabolites and a small amount of suspended solids in wastewater treatment plants can lead to a decrease in membrane flux, affecting wastewater treatment efficiency. Therefore, regular cleaning of the MBR membrane is necessary.

[0003] Currently, the cleaning of MBR membranes typically involves removing the membrane sheets from the MBR membrane tank and rinsing them with tap water to remove surface sludge and impurities, leaving the membrane fibers free of visible sludge and turbidity. However, this cleaning method has several problems: when the demand for MBR membrane cleaning is high, the cleaning cycle is long, and rinsing with tap water alone is insufficient to completely remove contaminants from the membrane surface, resulting in incomplete cleaning; the process requires a large amount of manual labor, leading to high labor costs and energy consumption, which is detrimental to the efficient and economical operation of wastewater treatment plants; furthermore, different sizes of MBR membranes require different mounting brackets, resulting in low rotational efficiency and environmental unfriendliness. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hydraulically coordinated ultrasonic technology-based MBR membrane cleaning device, which solves the problems of long cleaning cycles, incomplete cleaning, high labor costs, environmental unfriendliness, and high energy consumption in existing technologies, and achieves efficient, stable, and low-cost 90° flipping of cardboard boxes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hydraulically coupled ultrasonic technology-based MBR membrane cleaning device includes:

[0007] The cleaning tank has a stirrer installed at the center of the bottom to agitate the water inside. Ultrasonic transducers are installed on the outer wall of the cleaning tank at even intervals. A drain pipe for draining wastewater is installed at the bottom of the cleaning tank.

[0008] Several horizontal frames are fixedly connected to pulleys at both ends and rest on the edge of the cleaning tank. Positioning plates are fixedly connected to the horizontal frames at intervals. The positioning plates are used to limit the two ends of the MBR membrane. Two adjacent horizontal frames form a group for placing rows of MBR membranes.

[0009] An adjusting rod, mounted on adjacent crossbars, is used to define the distance between two crossbars.

[0010] Furthermore, the cleaning tank is configured in a square shape.

[0011] Furthermore, the adjusting rod includes a telescopic rod and two connectors. The telescopic rod adjusts its length by telescoping, and the connectors are rotatably mounted at both ends of the telescopic rod. The connectors are detachably connected to the crossbar.

[0012] Furthermore, the telescopic rod includes three sleeves and a spring. The sleeves at both ends are slidably connected to the middle sleeve, and the two ends of the spring are respectively fixedly connected to the inside of the sleeves at both ends for tightening the sleeves at both ends.

[0013] Furthermore, the telescopic rod is equipped with an electric pneumatic cylinder.

[0014] Furthermore, the crossbar is provided with a threaded hole that mates with the connector, and the connector is threadedly connected to the crossbar.

[0015] Furthermore, the crossbar has a connecting hole that mates with the connector, and the connector is fastened to the crossbar.

[0016] Furthermore, the stirrer includes a motor, a rotating shaft, and stirring blades. The motor is installed at the bottom of the cleaning tank, and the rotating shaft is vertically rotatably installed at the center of the cleaning tank. The motor is connected to the rotating shaft for transmission. The stirring blades are fixedly connected to the rotating shaft, and the stirring blades are narrow at the top and wide at the bottom, forming an arc transition.

[0017] Furthermore, the bottom of the cleaning tank is designed as a drain, and the drain pipe is installed at the lowest point of the bottom of the cleaning tank.

[0018] Furthermore, the cleaning tank is fixedly connected to a mesh shell for housing other components inside the shell.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This utility model sets up a cleaning tank, a stirrer and an ultrasonic transducer. The stirrer agitates the water to form a water impact, and at the same time, the ultrasonic transducer generates ultrasonic waves for cleaning. The water impact and ultrasonic waves work together to more effectively remove microbial metabolites and suspended solids on the surface of the MBR membrane, improve the thoroughness of cleaning, and solve the problem of incomplete cleaning in the prior art.

[0021] 2. This device can achieve automated cleaning of MBR membranes, eliminating the need for manual cleaning of each membrane sheet. When the demand for MBR membrane cleaning is large, it can significantly reduce personnel input, lower labor costs, and solve the problem of high labor costs.

[0022] 3. Compared with traditional manual rinsing methods, the cleaning process of this device is more efficient, which can shorten the cleaning cycle and consume relatively less energy during the cleaning process, thus solving the problems of long cleaning cycles and high energy consumption.

[0023] 4. The spacing between the two crossbars can be adjusted by using the adjusting rod to accommodate MBR membranes of different sizes, saving materials and being environmentally friendly. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 This is a schematic diagram of the main structure of an embodiment of the present utility model;

[0026] Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0027] Figure 3 for Figure 1 A magnified structural diagram of point A in the middle.

[0028] In the above attached diagram: 1. Cleaning tank; 2. Agitator; 21. Motor; 22. Rotating shaft; 23. Agitator blade; 3. Ultrasonic transducer; 4. Drain pipe; 5. Horizontal frame; 6. Positioning plate; 7. Adjusting rod; 71. Telescopic rod; 72. Connector; 8. Threaded hole; 9. Outer shell. Detailed Implementation

[0029] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] like Figures 1-2 As shown in the figure, this utility model embodiment proposes a hydraulically coordinated ultrasonic technology flushing MBR membrane cleaning device, including a cleaning tank 1, several crossbars 5 and adjusting rods 7.

[0032] The cleaning tank 1 can be made of stainless steel and is square in shape. The square structure facilitates the installation of components and ensures relatively uniform water flow distribution inside. Its dimensions can be determined based on the size and number of MBR membranes being cleaned, and can be set to 6 meters long, 4 meters wide, and 1.8 meters high. An agitator 2 is installed at the center of the bottom of the cleaning tank 1 to agitate the water inside. The agitator 2 includes a motor 21, a rotating shaft 22, and agitator blades 23. The motor 21 can be a Y132M-4 three-phase asynchronous motor with a power of 7.5kW, installed at the bottom of the cleaning tank 1 and fixedly connected to the bottom of the cleaning tank 1 with bolts. The rotating shaft 22 is vertically rotatable and installed at the center of the cleaning tank 1, and is connected to the bottom of the cleaning tank 1 via bearings. The motor 21 and the rotating shaft 22 are connected by a coupling. The stirring blade 23 is fixedly connected to the rotating shaft 22. The stirring blade 23 is narrow at the top and wide at the bottom, with an arc transition. This structural design is conducive to better stirring of the water and enhancing the impact force of the water flow. The stirring blade 23 can be made of corrosion-resistant plastic or stainless steel.

[0033] Ultrasonic transducers 3 are installed on the outer wall of the cleaning tank 1. These transducers 3 can be piezoelectric ultrasonic transducers with a frequency of 20-40kHz. They are placed every 40cm, starting 30cm from the bottom of the cleaning tank 1. All ultrasonic transducers 3 are controlled by an ultrasonic power supply, which can be a model compatible with the transducers 3 to ensure stable ultrasonic wave generation. The ultrasonic waves generated by the transducers 3 can propagate in the water, utilizing the cavitation effect and mechanical vibration of the waves to assist in removing contaminants from the membrane surface.

[0034] The bottom of the cleaning tank 1 is equipped with a drain pipe 4 for draining wastewater. The bottom of the cleaning tank 1 is designed in the shape of a funnel, and the drain pipe 4 is installed at the lowest point of the bottom of the cleaning tank 1. This design makes it easy to completely drain the wastewater after cleaning. A drain valve can be installed on the drain pipe 4. The drain valve can be a ball valve, and the model is selected according to the diameter of the drain pipe 4, such as a DN50 ball valve.

[0035] Several horizontal frames 5 are fixedly connected to pulleys at both ends and rest on the edge of the cleaning tank 1. The pulleys can be made of nylon to reduce wear on the edge of the cleaning tank 1 and facilitate the movement of the horizontal frames 5 along the edge. Positioning plates 6 are fixedly connected to the horizontal frames 5 at intervals. The positioning plates 6 can be made of stainless steel and are fixed to the horizontal frames 5 by welding. The positioning plates 6 are used to limit the two ends of the MBR membrane to prevent the MBR membrane from shifting during the cleaning process. Two adjacent horizontal frames 5 form a group for placing rows of MBR membranes.

[0036] An adjusting rod 7 is installed on adjacent crossbeams 5 to define the distance between the two crossbeams 5, accommodating MBR membranes of different sizes. The adjusting rod 7 includes a telescopic rod 71 and two connectors 72. The telescopic rod 71 adjusts its length by extending or retracting. The crossbeam 5 has threaded holes 8 that mate with the connectors 72. The connectors 72 are threadedly connected to the crossbeam 5, facilitating the installation and removal of the adjusting rod 7.

[0037] The cleaning box 1 is fixedly connected to a mesh shell 9. The shell 9 can be made of welded steel bars. The mesh size should be such that it can prevent personnel from contacting the internal parts. It is used to put other parts inside the shell 9 to avoid the parts from causing injury to personnel, such as the motor 21 shaft, belt, etc.

[0038] The working principle of this embodiment is as follows: First, the operator fills the cleaning tank 1 with tap water to a suitable level, with the water level sufficient to completely submerge the MBR membrane. Then, according to the size of the MBR membrane, the distance between two adjacent crossbars 5 is adjusted by adjusting rod 7, and the membrane is placed between the positioning plates 6 of the crossbars 5, using the positioning plates 6 to limit the position of the membrane. Next, the power to the motor 21 and the ultrasonic transducer 3 is turned on. The motor 21 drives the rotating shaft 22 and the stirring blades 23 to rotate, stirring the water to form a water impact. At the same time, the ultrasonic transducer 3 generates ultrasonic waves. Under the combined action of water impact and ultrasonic waves, the MBR membrane is cleaned. After cleaning, the power is turned off, the drain valve is opened, and the cleaning wastewater is discharged through the drain pipe 4.

[0039] Among them, such as Figure 2 As shown, depending on different production needs, the baffles 7 can be set to 1-3. When set to 2, the two baffles 7 are arranged in a straight line along the axis of the baffle shaft 3 with a spacing of 80mm; when set to 3, the three baffles 7 are arranged in a 120° ring on the baffle shaft 3. In this embodiment, for a standard cardboard box with dimensions of 200mm×150mm×100mm, 3 baffles 7 are preferably set. This design allows for reasonable adjustment of the number of baffles 7 according to the size and weight of the cardboard box to provide the best flipping assistance effect, ensuring efficient completion of the cardboard box flipping task under different working conditions.

[0040] The technical solution in this embodiment utilizes the synergistic effect of water jet and ultrasonic waves to clean the MBR membrane, thereby improving the cleaning effect and efficiency, reducing labor costs and energy consumption, and demonstrating good practicality.

[0041] Example 2

[0042] like Figure 3As shown, the difference between this embodiment and Embodiment 1 is that the telescopic rod 71 includes three sleeves and a spring. The sleeves at both ends are slidably connected to the middle sleeve, and the two ends of the spring are respectively fixedly connected to the inside of the sleeves at both ends for tightening the sleeves at both ends. This telescopic rod 71 has a simple structure and can maintain a stable distance between the two crossbars 5 through the tension of the spring, making it suitable for scenarios where the accuracy of adjusting the distance between the crossbars 5 is not high.

[0043] Example 3

[0044] The difference between this embodiment and Embodiment 1 is that the telescopic rod 71 adopts an electric pneumatic cylinder. The electric pneumatic cylinder can be a small electric cylinder of model DGJ. By electrically controlling the extension and retraction of the telescopic rod 71, the distance between the two crossbars 5 can be adjusted more precisely. This is suitable for situations where the accuracy of the adjustment of the distance between the crossbars 5 is required, thus improving the flexibility and applicability of the device.

[0045] Example 4

[0046] The difference between this embodiment and embodiment 1 is that the crossbar 5 has a connecting hole that matches the connector 72. The connector 72 is fastened to the crossbar 5. The fastening method makes installation and disassembly more convenient and improves the efficiency of installing and replacing the adjusting rod 7.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A hydraulically coordinated ultrasonic technology flushing and cleaning device for MBR membranes, characterized in that, include: The cleaning tank has a stirrer installed at the center of the bottom to agitate the water inside. Ultrasonic transducers are installed on the outer wall of the cleaning tank at even intervals. A drain pipe for draining wastewater is installed at the bottom of the cleaning tank. Several horizontal frames are fixedly connected to pulleys at both ends and rest on the edge of the cleaning tank. Positioning plates are fixedly connected to the horizontal frames at intervals. The positioning plates are used to limit the two ends of the MBR membrane. Two adjacent horizontal frames form a group for placing rows of MBR membranes. An adjusting rod, mounted on adjacent crossbars, is used to define the distance between two crossbars.

2. The hydraulically coordinated ultrasonic technology flushing MBR membrane cleaning device as described in claim 1, characterized in that, The cleaning tank is square in shape.

3. The hydraulically coordinated ultrasonic technology flushing MBR membrane cleaning device as described in claim 1, characterized in that, The adjusting rod includes a telescopic rod and two connectors. The telescopic rod adjusts its length by telescoping. The connectors are rotatably installed at both ends of the telescopic rod and are detachably connected to the crossbar.

4. The hydraulically coordinated ultrasonic technology flushing MBR membrane cleaning device as described in claim 3, characterized in that, The telescopic rod includes three sleeves and a spring. The sleeves at both ends are slidably connected to the middle sleeve. The two ends of the spring are respectively fixedly connected to the inside of the sleeves at both ends for tightening the sleeves at both ends.

5. The hydraulically coordinated ultrasonic technology flushing MBR membrane cleaning device as described in claim 3, characterized in that, The telescopic rod is powered by an electric pneumatic cylinder.

6. The hydraulically coordinated ultrasonic technology flushing MBR membrane cleaning device as described in claim 3, characterized in that, The crossbar has a threaded hole that mates with the connector, and the connector is threadedly connected to the crossbar.

7. The hydraulically coordinated ultrasonic technology flushing MBR membrane cleaning device as described in claim 3, characterized in that, The crossbar has a connecting hole that mates with the connector, and the connector is fastened to the crossbar.

8. The hydraulically coordinated ultrasonic technology flushing MBR membrane cleaning device as described in claim 1, characterized in that, The agitator includes a motor, a rotating shaft, and agitator blades. The motor is installed at the bottom of the cleaning tank, and the rotating shaft is vertically rotatably installed at the center of the cleaning tank. The motor is connected to the rotating shaft for transmission. The agitator blades are fixedly connected to the rotating shaft, and the agitator blades are narrow at the top and wide at the bottom, forming an arc transition.

9. The hydraulically coordinated ultrasonic technology flushing MBR membrane cleaning device as described in claim 1, characterized in that, The bottom of the cleaning tank is designed as a drain, and the drain pipe is installed at the lowest point of the bottom of the cleaning tank.

10. The hydraulically coordinated ultrasonic technology flushing MBR membrane cleaning device as described in claim 1, characterized in that, The cleaning tank is fixedly connected to a mesh shell for housing the components inside the shell.

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