Ultrasonic cleaning device suitable for MBR (Membrane Bioreactor) membrane component

Abstract

The utility model provides an ultrasonic cleaning device suitable for an MBR (Membrane Bioreactor) membrane component, which is characterized by comprising a cleaning device, a membrane frame, an aeration system and a control system, the cleaning device is divided into a cleaning area and a threading area, the cleaning area is located above the threading area, and a positioning guide rail, a membrane frame, an ultrasonic oscillator and a threading sleeve are arranged in the cleaning area; a threading sleeve is arranged in the threading area; a current branch wire is arranged in the threading sleeve; and a membrane frame air inlet is formed in the membrane frame. According to the utility model, by optimizing the spatial distribution and phase matching strategy of the ultrasonic oscillator array, the directional control of the sound wave interference mode is realized, so that a steady-state sound field covering the whole domain of the film assembly is constructed. According to the technology, modular programmable array layout is adopted, real-time self-adaptive adjustment of sound field energy is supported, and the cleaning requirements of membrane assemblies of different specifications can be accurately met.

Description

Technical Field

[0001] This utility model relates to an ultrasonic cleaning device, and more specifically, to an ultrasonic cleaning device suitable for MBR membrane modules. Background Technology

[0002] Membrane bioreactor (MBR) technology, by coupling biodegradation and membrane separation units, significantly improves ammonia nitrogen and COD removal rates while achieving decoupled control of sludge age and hydraulic retention time, making it the preferred process for treating wastewater with high discharge standards. However, due to its process characteristics, the system needs to maintain a high MLSS concentration, resulting in long-term exposure of the membrane module to a mixed liquor containing high concentrations of colloidal particles and macromolecular organic matter. This leads to irreversible membrane pore blockage, ultimately causing a sharp increase in transmembrane pressure and a decline in membrane flux, posing engineering challenges. Current engineering practices mainly use a combination of air-water two-phase flushing and sodium hypochlorite chemical backwashing to slow down the membrane fouling process. However, studies have shown that this method can only remove the surface filter cake layer, with a removal efficiency of less than 25% for adsorbed organic pollutants inside the membrane pores. Furthermore, frequent high-intensity aeration accelerates the mechanical fatigue and breakage of the membrane fibers. Ultrasonic cavitation technology, due to its unique physical cleaning mechanism, is gradually being applied in the field of membrane cleaning. For example, patent CN118059686A enhances contaminant removal by evenly distributing ultrasonic generators at the bottom of the cleaning tank and utilizing the standing wave effect; patent CN212467745U employs a circumferential array of vibrating plates to improve sound field coverage. However, actual engineering feedback shows that when the cleaning tank volume is large, the unevenness of sound intensity distribution can reach 45%-65%, resulting in insufficient sound energy density in local areas, forming cleaning blind zones, while sound energy overload in the near-field region causes cavitation erosion damage to the membrane surface, seriously affecting the service life of the membrane material.

[0003] To address this challenge, there is an urgent need to develop novel acoustic field modulation technologies to overcome the spatial constraints of existing ultrasonic cleaning devices. Based on this, we have invented an ultrasonic cleaning device suitable for MBR membrane modules. This device achieves directional control of acoustic wave interference modes by optimizing the spatial distribution and phase matching strategy of the ultrasonic oscillator array, thereby constructing a steady-state acoustic field covering the entire membrane module. This technology employs a modular programmable array layout, supporting real-time adaptive adjustment of acoustic field energy, and can precisely match the cleaning requirements of membrane modules of different specifications. In summary, this invention effectively solves the efficiency attenuation problem caused by uneven acoustic field distribution in ultrasonic cleaning, providing a highly uniform and low-energy-consumption cleaning technology path for large-scale membrane systems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides an ultrasonic cleaning device suitable for MBR membrane modules, adopting the following technical solution:

[0005] An ultrasonic cleaning device for MBR membrane modules is characterized by comprising a cleaning device, a membrane frame, an aeration system, and a control system; the cleaning device is divided into a cleaning area and a wiring area, the cleaning area being located above the wiring area, and the cleaning area containing a positioning guide rail, a membrane frame, an ultrasonic oscillator, and a wiring sleeve; the wiring area is provided with a wiring sleeve; the wiring sleeve contains a current branch line; and the membrane frame is provided with a membrane frame air inlet.

[0006] Furthermore, the aeration system includes an aeration pipe connected to the air inlet of the membrane frame and a Roots blower connected to the pipe; the control system includes a control power supply and a junction box, the control power supply is connected to the junction box via a current bus, and the junction box is electrically connected to the conduits of each section of the ultrasonic oscillator via multiple independent current branches passing through conduits.

[0007] Furthermore, the cleaning device is also equipped with a heating plate and a temperature sensor on its side wall, and the heating plate is connected to a control power supply.

[0008] Furthermore, a drain outlet is provided below the cleaning area of ​​the cleaning device.

[0009] Furthermore, the threading sleeve vertically penetrates the cleaning area and threading area of ​​the cleaning device, with its top end extending into the cleaning area and connected to the ultrasonic oscillator via a threaded connection.

[0010] Furthermore, the ultrasonic oscillator consists of at least two sections, with a round cap welded to the top.

[0011] Compared with existing technologies, the advantages of this utility model are:

[0012] (1) Based on the gap between the membrane fibers, the ultrasonic oscillator is arranged inside the membrane frame. Compared with other devices that place the oscillator on the inner wall or bottom of the membrane washing tank, this device can better ensure the uniformity of the sound wave distribution during ultrasonic cleaning and effectively avoid the waste of electrical energy and the phenomenon of incomplete or excessive cleaning of the membrane fibers.

[0013] (2) The ultrasonic oscillator consists of multiple sections, the number of which is adjustable and flexible, and can be used for cleaning membrane frames of different sizes. Each section is connected by threads, which ensures the connection is sealed while reducing the space occupied. A semi-circular cap is welded on the top to avoid damage to the membrane assembly during lifting and lowering. At the same time, the threaded connection is easy to disassemble and facilitates later maintenance.

[0014] (3) Each ultrasonic oscillator power cord is connected to the junction box separately. During maintenance, only the corresponding power cord needs to be unplugged, which does not affect the use of other ultrasonic oscillators.

[0015] (4) A positioning guide rail is provided on the upper part of the main body of the cleaning device to ensure that the ultrasonic oscillator can be inserted into the inside of the membrane frame, i.e., in the gap between the membrane fibers, after the membrane frame is lowered into the cleaning device.

[0016] (5) A heating plate is installed on the upper inner wall of the cleaning device to improve the cleaning effect by controlling the water temperature.

[0017] (6) The main body of the cleaning device is equipped with an aeration pipe, which is connected to a blower. During the ultrasonic cleaning stage of the membrane, the blower aeration can increase the number of cavitation bubbles in the water of the cleaning device and enhance the cavitation effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a side view of the present invention.

[0020] The components are: 1-cleaning device, 101-cleaning area, 102-threading area, 2-membrane frame, 3-threading sleeve, 4-ultrasonic oscillator, 5-junction box, 6-control power supply, 7-heating plate, 8-current branch line, 9-current bus, 10-Roots blower, 11-positioning guide rail, 12-drain outlet, 13-aeration pipe, 14-temperature sensor, 15-membrane frame air inlet, and 16-round cap. Detailed Implementation

[0021] The present invention will be further described and illustrated below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 and Figure 2 As shown, this utility model provides an ultrasonic cleaning device suitable for MBR membrane modules, characterized in that it includes a cleaning device 1, a membrane frame 2, an aeration system, and a control system; the cleaning device 1 is divided into a cleaning area 101 and a wiring area 102, the cleaning area 101 is located above the wiring area 102, and the cleaning area 101 is provided with a positioning guide rail 11, a membrane frame 2, an ultrasonic oscillator 4, and a wiring sleeve 3; the wiring area 102 is provided with a wiring sleeve 3; the wiring sleeve 3 is provided with a current branch line 8; and the membrane frame 2 is provided with a membrane frame air inlet 15.

[0023] The aeration system includes an aeration pipe 13 connected to the air inlet 15 of the membrane frame and a Roots blower 10 connected to the pipe; the control system includes a control power supply 6 and a junction box 5. The control power supply 6 is connected to the junction box 5 through a current bus 9. The junction box 5 is electrically connected to the conduit 3 of each segment of the ultrasonic oscillator 4 through multiple independent current branches 8 passing through the conduit 3.

[0024] The cleaning device 1 is also provided with a heating plate 7 and a temperature sensor 14 on its side wall. The heating plate 7 is connected to the control power supply 6.

[0025] A drain outlet 12 is also provided below the cleaning area 101 of the cleaning device 1.

[0026] The threading sleeve 3 vertically penetrates the cleaning area 101 and the threading area 102 of the cleaning device 1, with its top end extending into the cleaning area 101 and connected to the ultrasonic oscillator 4 via a threaded connection.

[0027] The ultrasonic oscillator 4 consists of at least two sections, with a round cap 16 welded to its top.

[0028] The system's processing flow is as follows:

[0029] When membrane frame 2 needs cleaning, a lifting tool is used to lift it into the cleaning area 101 of the cleaning device 1. During descent, the positioning guide rail 11 is used for horizontal positioning. After the membrane frame 2 lands, the aeration pipe 13 is connected to the membrane frame air inlet 15, and water begins to enter the cleaning area 101 of the cleaning device 1 until the membrane frame 2 is completely submerged. Then, the Roots blower 10 is started, and the Roots blower 10 aerates the water in the cleaning area 101 of the cleaning device 1 through the aeration pipe 13. The heating plate 7 is started by the control power supply 6 to heat the water. After the temperature sensor 14 shows that the temperature has reached the preset temperature, the heating plate 7 stops heating and maintains the current temperature. The ultrasonic oscillator 4 is started by the control power supply 6 to perform ultrasonic cleaning. The ultrasonic cleaning time is determined according to the previous experiment. After the ultrasonic cleaning is completed, the ultrasonic oscillator 4 and the heating plate 7 are turned off by the control power supply 6, and then the Roots blower 10 is turned off. The water in the cleaning area 101 is discharged from the device through the drain outlet 12.

[0030] When the core component of the cleaning device 1, the ultrasonic oscillator 4, needs to be disassembled and repaired, the current branch line 8 corresponding to each section of the ultrasonic oscillator 4 is disconnected through the junction box 5, and the ultrasonic oscillator 4 is separated from the threaded sleeve 3. Then, each section of the ultrasonic oscillator 4 is separated, so that the transducer inside the ultrasonic oscillator 4 can be repaired.

[0031] This invention achieves directional control of acoustic interference modes by optimizing the spatial distribution and phase matching strategy of the ultrasonic oscillator array, thereby constructing a steady-state acoustic field covering the entire membrane module. The technology employs a modular programmable array layout, supporting real-time adaptive adjustment of the acoustic field energy, and can precisely match the cleaning requirements of membrane modules of different specifications. In summary, this invention effectively solves the efficiency attenuation problem caused by uneven acoustic field distribution in ultrasonic cleaning, providing a highly uniform and low-energy-consumption cleaning technology path for large-scale membrane systems. Example

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0033] An ultrasonic cleaning device suitable for MBR membrane modules was trial-produced using the above technical solution, such as... Figure 1 and Figure 2 As shown.

[0034] The system includes a cleaning device 1, a cleaning area 101, a wiring area 102, a membrane frame 2, a wiring sleeve 3, an ultrasonic oscillator 4, a junction box 5, a control power supply 6, a heating plate 7, a current branch line 8, a current bus line 9, a Roots blower 10, a positioning guide rail 11, a drain outlet 12, an aeration pipe 13, a temperature sensor 14, a membrane frame air inlet 15, and a round cap 16.

[0035] The device includes a cleaning device 1, a membrane frame 2, an aeration system, and a control system. The cleaning device 1 is divided into a cleaning area 101 and a threading area 102. The cleaning area 101 is located above the threading area 102. The cleaning area 101 is equipped with a positioning guide rail 11, a membrane frame 2, an ultrasonic oscillator 4, and a threading sleeve 3. The threading area 102 is equipped with a threading sleeve 3. The threading sleeve 3 is equipped with a current branch line 8. The membrane frame 2 is equipped with a membrane frame air inlet 15.

[0036] The aeration system includes an aeration pipe 13 connected to the air inlet 15 of the membrane frame and a Roots blower 10 connected to the pipe; the control system includes a control power supply 6 and a junction box 5. The control power supply 6 is connected to the junction box 5 through a current bus 9. The junction box 5 is electrically connected to the conduit 3 of each segment of the ultrasonic oscillator 4 through multiple independent current branches 8 passing through the conduit 3.

[0037] The cleaning device 1 is also provided with a heating plate 7 and a temperature sensor 14 on its side wall. The heating plate 7 is connected to the control power supply 6.

[0038] A drain outlet 12 is also provided below the cleaning area 101 of the cleaning device 1.

[0039] The threading sleeve 3 vertically penetrates the cleaning area 101 and the threading area 102 of the cleaning device 1, with its top end extending into the cleaning area 101 and connected to the ultrasonic oscillator 4 via a threaded connection.

[0040] The ultrasonic oscillator 4 consists of at least two sections, with a round cap 16 welded to its top.

[0041] Using this device to perform ultrasonic cleaning on hollow fiber membrane elements made of polytetrafluoroethylene (PTFE) material, the membrane flux recovery rate can reach over 85%.

[0042] The above-described embodiments are merely illustrative of one implementation of this utility model and are not intended to limit it. It should be noted that those skilled in the art can modify the technical solutions described in the above embodiments or make equivalent substitutions for some or all of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the protection scope of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

Claims

1. An ultrasonic cleaning device suitable for MBR membrane modules, characterized in that, It includes a cleaning device, a membrane frame, an aeration system, and a control system; the cleaning device is divided into a cleaning area and a wiring area, the cleaning area is located above the wiring area, and the cleaning area is equipped with a positioning guide rail, a membrane frame, an ultrasonic oscillator, and a wiring sleeve; the wiring area is equipped with a wiring sleeve; the wiring sleeve is equipped with a current branch line; the membrane frame is equipped with a membrane frame air inlet.

2. The ultrasonic cleaning device for MBR membrane modules according to claim 1, characterized in that, The aeration system includes an aeration pipe connected to the air inlet of the membrane frame and a Roots blower connected to the pipe; the control system includes a control power supply and a junction box, the control power supply is connected to the junction box via a current bus, and the junction box is electrically connected to the conduits of each section of the ultrasonic oscillator via multiple independent current branches passing through conduits.

3. The ultrasonic cleaning device for MBR membrane modules according to claim 1, characterized in that, The cleaning device is also equipped with a heating plate and a temperature sensor on its side wall, and the heating plate is connected to a control power supply.

4. The ultrasonic cleaning device for MBR membrane modules according to claim 1, characterized in that, The cleaning device is also equipped with a drain outlet below the cleaning area.

5. An ultrasonic cleaning device for MBR membrane modules according to claim 1, characterized in that, The threading sleeve vertically penetrates the cleaning area and threading area of ​​the cleaning device, with its top end extending into the cleaning area and connected to the ultrasonic oscillator via a threaded connection.

6. The ultrasonic cleaning device for MBR membrane modules according to claim 1, characterized in that, The ultrasonic oscillator consists of at least two sections, with a round cap welded to the top.

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