Scanning ultrasonic cleaning device for non-submerged ceramic membrane group and cleaning method thereof

Abstract

The application discloses a scanning type ultrasonic cleaning device for non-submerged ceramic membrane groups and a cleaning method thereof. The device comprises a mounting frame, a bearing tool, a moving mechanism, a liquid supply mechanism and an ultrasonic generating mechanism. The ceramic membrane group is fixed in the bearing tool, the ultrasonic generating mechanism is arranged opposite to the bearing tool, is composed of a plurality of ultrasonic transducers arranged on the moving mechanism, the plurality of transducers are extended into adjacent membrane sheets after grouping, and are close to the corresponding membrane sheets to form a set gap. During cleaning, the liquid supply mechanism forms a liquid film on the surface of the membrane sheet, the moving mechanism drives the transducer group to scan along the extension direction of the membrane sheet, so that the ultrasonic wave is transmitted to the surface of the membrane sheet through the liquid film to generate cavitation effect, and the pollutants are stripped and taken away with the liquid flow. The device can clean the surface of the membrane sheet and the gap area on line without disassembling the membrane assembly, improves the cleaning efficiency and uniformity, reduces the downtime, has a compact structure, is convenient to install, can reduce the cleaning energy consumption and the manual operation demand.

Description

Technical Field

[0001] This invention relates to the field of membrane separation and water treatment technology, and in particular to a scanning ultrasonic cleaning device and cleaning method for non-immersion ceramic membrane modules. Background Technology

[0002] Ceramic membranes are widely used in water treatment, bio-fermentation, food and beverage processing, and chemical separation due to their excellent chemical stability, high-temperature resistance, wear resistance, and long service life. During long-term operation, the membrane surface and pores of ceramic membrane modules inevitably become clogged by the adsorption, deposition, and accumulation of pollutants such as organic matter, inorganic salts, colloids, and microorganisms. This leads to a gradual decrease in membrane flux, an increase in transmembrane pressure, and may even affect separation efficiency and system operational safety. Therefore, periodic cleaning of ceramic membrane modules is essential for maintaining their performance and extending their service life.

[0003] Existing ceramic membrane cleaning methods mainly fall into two categories: physical cleaning and chemical cleaning. Physical cleaning methods, such as backwashing, air scrubbing, and pulse jet cleaning, can remove loose dirt from the membrane surface, but their effectiveness in removing deep-seated fouling in the membrane pores is limited. Furthermore, some methods require high instantaneous pressure, which can lead to increased energy consumption and the risk of localized membrane damage. Simultaneously, during physical cleaning, the ceramic membrane cannot filter properly, ceasing water production and affecting the continuous operation of the ceramic membrane module.

[0004] Chemical cleaning requires disassembling the membrane module from the in-situ system and immersing it in an acid, alkali, or oxidizing cleaning solution to dissolve contaminants through a chemical reaction. While chemical cleaning can effectively remove deep-seated contaminants, it is cumbersome, time-consuming, labor-intensive, and the preparation and waste treatment of chemical cleaning solutions are costly. The disassembly process can also damage the membrane module or seals, increasing maintenance costs. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the technical problems of incomplete cleaning of ceramic membranes in the prior art, the need to stop or disassemble the machine, the complexity of operation, and the inability of existing ultrasonic cleaning equipment to clean the membrane module in situ.

[0006] To address the aforementioned technical problems, in a first aspect, the present invention provides a scanning ultrasonic cleaning device for a non-immersion ceramic membrane module, comprising: Mounting framework; A support fixture is mounted on the mounting frame, and the support fixture carries a ceramic membrane assembly. A moving mechanism, disposed on the mounting frame, is used to move along the extension direction of multiple membrane sheets of the ceramic membrane assembly; A liquid supply mechanism is used to supply cleaning fluid to multiple membrane sheets of a ceramic membrane module; and, An ultrasonic generating mechanism is arranged opposite to the supporting fixture and includes multiple ultrasonic transducers disposed on the moving mechanism. The multiple ultrasonic transducers are grouped to form multiple ultrasonic transducer groups. Each group of ultrasonic transducers extends between two adjacent diaphragms and is disposed close to the corresponding diaphragm to form a predetermined gap with the corresponding diaphragm.

[0007] In one embodiment of the present invention, the ultrasonic transducer group includes at least one ultrasonic transducer. When the ultrasonic transducer group includes multiple ultrasonic transducers, the multiple ultrasonic transducers are connected in series to form a group by a connector and extend along the width direction of the diaphragm of the ceramic diaphragm group.

[0008] In one embodiment of the present invention, the moving mechanism includes a moving plate, a motor disposed on the mounting frame, a lead screw connected to the motor, and a lead screw nut cooperating with the lead screw. The lead screw nut is disposed in the moving plate, and the extension direction of the lead screw is consistent with the extension direction of the diaphragm. A plurality of ultrasonic transducers are disposed on the moving plate.

[0009] In one embodiment of the present invention, the moving mechanism further includes a position sensor and a contact spring. The position sensor is disposed on the moving plate, and the contact spring is disposed on the lower part of the mounting frame. When the moving plate descends to a preset position, the position sensor contacts the contact spring to trigger a limit signal.

[0010] In one embodiment of the present invention, the ultrasonic generating mechanism further includes an ultrasonic generating system and a power amplifier, wherein the ultrasonic generating system is connected to the ultrasonic transducer group via the power amplifier.

[0011] In one embodiment of the present invention, the liquid supply mechanism includes a spray head and a liquid storage tank that are interconnected, and the spray head is disposed toward the supporting fixture.

[0012] In one embodiment of the present invention, a liquid return mechanism is further included, which is used to collect the coupling liquid flowing out of the spray area and then filter it for recycling or discharge.

[0013] In one embodiment of the present invention, a scrubbing mechanism is further included, which is disposed on the moving mechanism. Each scrubbing unit of the scrubbing mechanism extends between two adjacent diaphragms and makes flexible contact with the two adjacent diaphragms respectively.

[0014] In a second aspect, the present invention also provides a scanning ultrasonic cleaning method for non-immersion ceramic membrane modules, implemented using the scanning ultrasonic cleaning device for non-immersion ceramic membrane modules provided in the first aspect, comprising the following steps: Start the liquid supply mechanism to form a continuous liquid film of cleaning fluid on the surface of multiple membranes of the ceramic membrane module; The ultrasonic generator is activated and the moving mechanism is driven to make the ultrasonic transducer group move in a scanning manner along the extension direction of multiple membranes of the ceramic membrane group. Multiple ultrasonic transducers are respectively attached close to the corresponding diaphragms and perform ultrasonic vibration. The ultrasonic waves are transmitted to the diaphragm surface through the cleaning fluid in the set gap, forming a cavitation effect on the diaphragm surface and its adjacent area to generate a force to peel off contaminants from the diaphragm; at the same time, the peeled contaminants are carried away by the flowing cleaning fluid.

[0015] In one embodiment of the present invention, the method further includes: during the scanning process of the ultrasonic transducer group, a wiping mechanism moves synchronously with the moving mechanism to wipe the corresponding diaphragm.

[0016] The technical solution of the present invention has the following advantages compared with the prior art: First, the ceramic membrane module is directly fixed to the installation frame by the support fixture, so that the cleaning device and the membrane module form an integrated structure. The cleaning operation can be performed without disassembling the membrane module, thus avoiding the problems of traditional immersion cleaning that require a large tank and downtime for disassembly, improving the convenience of cleaning and reducing downtime.

[0017] Secondly, multiple ultrasonic transducers are grouped and mounted on the moving mechanism, extending between adjacent diaphragms and positioned close to the corresponding diaphragms to form a predetermined gap. This structure allows the transducers to directly enter the narrow gap area between the diaphragms, transmitting ultrasonic energy over a short distance near the diaphragm surface. This reduces energy attenuation in the liquid and improves the effectiveness of cavitation on the diaphragm surface, thus solving the problem of insufficient cleaning capacity in the diaphragm gap area by traditional cleaning methods.

[0018] At the same time, the moving mechanism drives the ultrasonic transducer assembly to move in a scanning motion along the extension direction of the diaphragm, so that the ultrasonic action covers the entire length of the diaphragm, which can avoid the uneven cleaning caused by cleaning only in local areas and improve the consistency of the overall cleaning.

[0019] In addition, the liquid supply mechanism continuously supplies cleaning fluid to the membrane surface, maintaining a stable liquid film layer between the transducer and the membrane. This layer is used for both the coupling and transmission of ultrasonic waves and to promptly remove contaminants that fall off during ultrasonic action from the membrane surface, reducing the problem of contaminant redeposition and improving cleaning efficiency.

[0020] In summary, by combining key features such as transducer arrays extending into the diaphragm gap and close arrangement, along with scanning movement and continuous liquid supply, this invention can perform efficient and uniform online ultrasonic cleaning of the diaphragm surface and gap area without disassembling the diaphragm assembly. This effectively solves the technical problems of existing immersion cleaning methods, such as large footprint, long downtime, and incomplete cleaning of the diaphragm gap area. Attached Figure Description

[0021] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is a front view of the scanning ultrasonic cleaning device for non-immersion ceramic membrane modules provided in Embodiment 1 of the present invention; Figure 2 This is a front view of another embodiment of the scanning ultrasonic cleaning device for non-immersion ceramic membrane modules provided in Embodiment 1 of the present invention; Figure 3 This is a partial front view of the scanning ultrasonic cleaning device for non-immersion ceramic membrane modules provided in Embodiment 1 of the present invention; Figure 4 This is a top view of the ultrasonic generating mechanism and the moving plate provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the structure of the scanning ultrasonic cleaning device for non-immersion ceramic membrane modules provided in Embodiment 1 of the present invention (the ultrasonic generating mechanism and the wiping mechanism are not shown in the figure).

[0023] Explanation of reference numerals in the accompanying drawings: 10. Mounting frame; 20. Bearing fixture; 21. Limiting slot; 30. Moving mechanism; 31. Moving plate; 32. Motor; 33. Lead screw; 34. Lead screw nut; 35. Position sensor; 36. Guide column; 37. Guide sleeve; 40. Liquid supply mechanism; 41. Spray head; 42. Liquid storage tank; 43. Liquid delivery pipeline; 44. Pump; 45. Flow meter; 50. Ultrasonic generating mechanism; 51. Ultrasonic transducer; 52. Connector; 53. Ultrasonic generating system; 60. Scrubbing mechanism; 61. Scrubbing unit; 70. Liquid return mechanism; 80. Ceramic membrane module; 81. Diaphragm. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0025] Example 1: See Figures 1 to 5 As shown, this embodiment of the invention provides a scanning ultrasonic cleaning device for non-immersion ceramic membrane modules, including a mounting frame 10, a support fixture 20, a moving mechanism 30, a liquid supply mechanism 40, and an ultrasonic generating mechanism 50. The mounting frame 10 is used to support and position the overall cleaning structure, and can be a welded frame or a modular frame structure depending on the actual situation.

[0026] The support fixture 20 is mounted on the mounting frame 10 to support and fix the ceramic membrane assembly 80, ensuring that the ceramic membrane assembly 80 remains stable and does not shift during the cleaning process. The support fixture 20 can be equipped with two rows of limiting slots 21 according to the structural shape of different types of membrane assemblies. Each row includes multiple evenly arranged limiting slots 21, and the two ends of the membrane sheet 81 are respectively inserted into the corresponding limiting slots 21 to ensure that the spacing between the multiple membrane sheets 81 remains consistent.

[0027] The moving mechanism 30 is mounted on the mounting frame 10 and is used to move along the extension direction of the multiple membranes 81 of the ceramic membrane module 80. In actual operation, the membranes 81 are vertically arranged, and the extension direction is the up and down direction when the membranes 81 are vertically arranged. The moving speed and stroke of the moving mechanism 30 can be adjusted according to the length of the membranes 81, the degree of contamination and the cleaning requirements to achieve controllable scanning cleaning.

[0028] The ultrasonic generating mechanism 50 is positioned opposite to the supporting fixture 20, and includes multiple ultrasonic transducers 51 mounted on the moving mechanism 30. These multiple ultrasonic transducers 51 are grouped to form multiple ultrasonic transducer groups. Each ultrasonic transducer group corresponds to one side of a diaphragm 81 (i.e., the surface of the diaphragm 81 where its length and width lie), extending between adjacent diaphragms 81 and closely positioned to form a predetermined gap with the corresponding diaphragm 81. In other words, each of the two opposite sides of a diaphragm 81 (i.e., the surface of the diaphragm 81 where its length and width lie) corresponds to one ultrasonic transducer group, ensuring that both sides of the diaphragm 81 are subjected to ultrasonic waves. Two ultrasonic transducer groups are positioned between adjacent diaphragms 81, arranged back-to-back (e.g., ...). Figure 4 As shown in the figure, and respectively attached close to the two adjacent membranes 81.

[0029] Specifically, ultrasonic generating mechanisms 50 are respectively provided on one side or on opposite sides of the moving mechanism 30, preferably, such as Figure 4 As shown, ultrasonic generating mechanisms 50 are respectively arranged on opposite sides of the moving mechanism 30, and bearing fixtures 20 are respectively arranged on the outer sides of the moving mechanism 30. This allows the moving mechanism 30 to simultaneously perform scanning cleaning on the ceramic membrane assemblies 80 on both sides during its movement, thereby improving cleaning efficiency. In addition, the ultrasonic generating mechanisms 50, located on opposite sides of the moving mechanism 30, also serve as counterweights and stabilizers for the moving mechanism 30, ensuring smooth operation during reciprocating motion.

[0030] The liquid supply mechanism 40 is used to supply cleaning fluid to the multiple membranes 81 of the ceramic membrane module 80. It can spray the cleaning fluid from above the membranes 81, allowing it to cover the entire membrane surface under gravity and form a continuous liquid film between the transducer and the membranes 81. The cleaning fluid can be water or a coupling fluid as needed. The dedicated coupling fluid has the characteristics of good fluidity, non-corrosiveness, and non-contamination of the membrane.

[0031] During the cleaning process of this scanning ultrasonic cleaning device for non-immersion ceramic membrane modules, the liquid supply mechanism 40 is first activated to form a stable liquid film on the surface of the membrane 81. Then, the ultrasonic generating mechanism 50 is activated, and the ultrasonic transducer assembly generates ultrasonic vibrations. The ultrasonic waves are transmitted through the liquid film to the surface of the membrane 81, creating cavitation on the membrane surface and in the gaps. The microjets, instantaneous local impact forces, and shear forces generated by cavitation break down, loosen, and gradually peel off contaminants on the surface of the membrane 81. Simultaneously, the moving mechanism 30 drives the transducer assembly to scan along the length (extension direction) of the membrane 81, ensuring that the ultrasonic waves cover the entire membrane 81 and preventing insufficient cleaning in certain areas.

[0032] Contaminants detached under ultrasonic cleaning are carried away from the membrane surface 81 by the flowing cleaning fluid and can be treated through external recovery or filtration systems. The cleaning process can be performed in single or multiple scans depending on the degree of membrane fouling to achieve the desired cleaning effect.

[0033] This invention enables online ultrasonic cleaning of membrane modules without disassembly, reducing system downtime and improving maintenance efficiency. The ultrasonic transducer array extends horizontally between the two membranes 81 and is positioned close to them, ensuring sufficient ultrasonic energy transmission in narrow areas and enhancing contaminant removal capabilities. Scanning cleaning ensures more uniform ultrasonic action. Continuous liquid supply facilitates ultrasonic coupling and contaminant removal, thereby reducing the risk of secondary deposition. The device is compact, highly adaptable, and applicable to cleaning various types of ceramic membrane modules 80.

[0034] For ease of understanding, it should be noted that this device is not only suitable for cleaning a single ceramic membrane module, but can also clean multiple ceramic membrane modules 80 simultaneously. For example... Figure 2 As shown, in other embodiments of this example, two sets of mounting frames 10, moving mechanisms 30, and ultrasonic generating mechanisms 50 can be configured to independently complete positioning, movement, and ultrasonic action. Ultrasonic generating mechanisms 50 are respectively arranged on opposite sides of each set of moving mechanisms 30, and support fixtures 20 are respectively arranged on the outer sides of each set of moving mechanisms 30. The liquid supply mechanism 40 can adopt a shared structure; one set of liquid supply mechanism 40 can simultaneously supply liquid to the ceramic membrane groups 80 on four sets of support fixtures 20, reducing redundant equipment configuration and space occupation.

[0035] An ultrasonic transducer assembly includes at least one ultrasonic transducer 51. When the width of the diaphragm 81 is small, a single transducer can be used as a group. When the width of the diaphragm 81 is large, the ultrasonic transducer assembly can be composed of multiple ultrasonic transducers connected in series (e.g., ...). Figure 4As shown in the figure, the dashed box represents a group of ultrasonic transducers. Multiple transducers are fixed together by connectors 52 and arranged along the width of the diaphragm 81. This ensures that the working surfaces of each ultrasonic transducer 51 in the ultrasonic transducer group are continuously distributed in the same plane, thus forming a continuous ultrasonic action zone along the width of the diaphragm 81 and preventing insufficient cleaning of certain areas of the diaphragm 81. See also... Figure 1 As shown, the connector 52 can adopt a connecting rod structure, and multiple ultrasonic transducers 51 are connected in series through the connecting rod structure.

[0036] See Figures 1 to 2 As shown, the moving mechanism 30 includes a moving plate 31, a motor 32 (which may be a servo motor), a lead screw 33, and a lead screw nut 34. The moving plate 31 is used to directly mount multiple ultrasonic transducers 51. The motor 32 is mounted on the mounting frame 10 and drives the lead screw 33 to rotate via a coupling. The lead screw nut 34 is threadedly engaged with the lead screw 33 and fixedly connected to the moving plate 31, causing the moving plate 31 to move axially along the lead screw 33. The extension direction of the lead screw 33 is consistent with the extension direction of the diaphragm 81; that is, when the diaphragm 81 is vertically arranged, the lead screw 33 extends in the vertical direction, thereby driving the transducer assembly to scan along the length of the diaphragm 81.

[0037] By controlling the speed of motor 32, the scanning speed of the ultrasonic transducer group can be precisely adjusted to meet the needs of different cleaning intensities, contamination levels, and diaphragm lengths 81.

[0038] See Figure 1 or Figure 2 As shown, the moving mechanism 30 is also equipped with a position sensor 35 and a contact spring, used to detect the vertical movement position of the moving plate 31 and to achieve lower limit protection. The position sensor 35 is mounted on the moving plate 31 and can move synchronously with the moving plate 31 and monitor its height in real time. The contact spring is located at the bottom of the mounting frame (which can be understood as the lowest position of the mounting frame). When the moving plate 31 moves to the bottom, the position sensor 35 contacts the contact spring, thereby triggering a limit signal, and the moving plate 31 stops descending, thus preventing the ultrasonic transducer assembly from descending excessively.

[0039] Specifically, the moving plate 31 starts from the bottom position and moves upward to the preset highest position, then reverses direction and moves downward until it returns to the bottom position, completing one complete reciprocating stroke. Depending on the degree of contamination of the diaphragm 81, the moving mechanism 30 can be set to perform multiple reciprocating strokes to increase the coverage and cleaning intensity of the ultrasonic treatment. After the cleaning process is completed, the moving plate 31 finally stops at the bottom position, facilitating preparation for the next round of cleaning or subsequent maintenance operations.

[0040] To ensure the stability of the moving plate during vertical movement, the moving mechanism 30 also includes a guide post 36 and a guide sleeve 37. The two ends of the guide post 36 are fixedly mounted on the mounting frame 10, and its axial direction is consistent with the extension direction of the lead screw 33. The guide sleeve 37 is disposed on the moving plate 31 and slides in cooperation with the guide post 36, ensuring reliable linear guidance for the moving plate 31 as it moves up and down with the lead screw nut 34, thereby preventing the moving plate from tilting or swaying.

[0041] See Figure 4 As shown, the ultrasonic generating mechanism 50 also includes an ultrasonic generating system 53 and a power amplifier. The ultrasonic generating system 53 is connected to the ultrasonic transducer group via the power amplifier. The ultrasonic generating system 53 is used to provide a frequency-stable ultrasonic signal to multiple ultrasonic transducers 51, while the power amplifier amplifies the ultrasonic signal to meet the ultrasonic power output requirements of different diaphragm 81 regions.

[0042] The power amplifier and ultrasonic generator system 53 are mounted on the mounting frame 10. The output power of the power amplifier can be adjusted according to cleaning requirements, ensuring that the ultrasonic transducer assembly provides appropriate ultrasonic intensity under both light and heavy contamination conditions. This structure ensures the stable and reliable cavitation effect generated by the ultrasonic transducer assembly, thereby improving overall cleaning efficiency.

[0043] See Figure 1 As shown, the liquid supply mechanism 40 may include a spray head 41 and a liquid storage tank 42 that are interconnected. The liquid storage tank 42 is used to store the cleaning fluid and delivers the cleaning fluid to the spray head 41 through a liquid delivery line 43. The spray head 41 is arranged facing the support fixture 20. Specifically, the spray head 41 is positioned above the support fixture 20 and sprays the cleaning fluid onto the diaphragm 81 from top to bottom. The liquid storage tank 42 may be equipped with a liquid level sensor to monitor the amount of cleaning fluid stored and can automatically replenish the fluid when necessary.

[0044] The liquid supply mechanism 40 may further include a pump 44 and a flow meter 45. The pump 44 and flow meter 45 can be installed in the liquid delivery pipeline 43 between the storage tank 42 and the spray head 41. Specifically, the inlet end of the pump 44 is connected to the outlet end of the storage tank 42, and the outlet end of the pump 44 is connected to the liquid delivery pipeline 43, for drawing and pressurizing the cleaning fluid from the storage tank 42 and delivering it to the spray head 41. The flow meter 45 is installed downstream of the pump 44 and connected in series with the liquid delivery pipeline 43, for real-time monitoring of the cleaning fluid flow rate delivered to the spray head 41.

[0045] To further improve the utilization rate of the cleaning cycle, a liquid return mechanism 70 can be provided to collect and treat the coupling liquid flowing out of the spray area. The liquid return mechanism 70 may include a collection tank, a drain pipe, and a filter assembly (not shown in the figure).

[0046] A collection tank is located below the ceramic membrane module 80 to receive the cleaning fluid and detached contaminants flowing down the surface of the membrane 81. The contaminants are discharged through a drain pipe. The filtration assembly can be in the form of a filter screen or filter to separate particulate impurities from the cleaning fluid. The filtered cleaning fluid can be returned to the storage tank 42 for continued recycling as cleaning fluid, or it can be discharged through the drain pipe and centrally collected and treated.

[0047] See Figures 1 to 3 As shown, it also includes a scrubbing mechanism 60, which is disposed on the moving mechanism 30. Each scrubbing unit 61 of the scrubbing mechanism 60 extends horizontally between two adjacent diaphragms 81 and makes flexible contact with each of the two adjacent diaphragms 81. The scrubbing unit 61 extends along the width direction of the diaphragm 81.

[0048] Each scrubbing unit 61 can be made of a flexible material, such as a sponge roller brush or a plastic roller brush, with the axial direction of the roller brush aligned with the width direction of the diaphragm 81. The size and flexibility of the scrubbing unit 61 can be selected according to the material of the diaphragm 81 and the spacing between the diaphragms 81, so that it can make flexible contact with the surface of the diaphragm 81 without damaging the diaphragm 81.

[0049] The wiping unit 61 extends between two adjacent diaphragms 81 and performs auxiliary scraping or wiping by making slight contact with the surface of the diaphragm 81. When the moving mechanism 30 drives the device to scan along the length of the diaphragm 81, the wiping unit 61 can continuously wipe the surface of the diaphragm 81, so that the contaminants that have been loosened by ultrasound can be removed from the diaphragm 81 more quickly and discharged with the liquid flow.

[0050] By combining ultrasonic cavitation with mechanical scrubbing, the ability to remove contaminants can be enhanced while reducing the number of cleaning cycles, thus improving overall cleaning efficiency. This method is particularly suitable for cleaning ceramic membrane modules 80 that are heavily contaminated or stubbornly clogged.

[0051] Example 2: See Figures 1 to 5 As shown, Embodiment 2 of the present invention provides a scanning ultrasonic cleaning method for a ceramic membrane module 80, which is implemented using the cleaning device in Embodiment 1, and includes the following steps: Start the liquid supply mechanism 40 to spray the cleaning liquid evenly onto the surface of multiple membranes 81 of the ceramic membrane module 80, forming a stable liquid film layer on the outer surface of the membranes 81. The ultrasonic generator 50 is activated, causing multiple ultrasonic transducer groups to generate ultrasonic vibrations. The ultrasonic waves are transmitted through the liquid film to the surface of the membrane 81, generating a cavitation effect on the membrane surface and its adjacent area. The instantaneous high-pressure impact, microjets, and local shear forces generated by the cavitation effect can destroy the structure of the contaminant layer (particles, colloids, or organic matter), causing the contaminant layer attached to the surface of the membrane 81 to gradually loosen and detach from the surface of the membrane 81.

[0052] During the ultrasonic cleaning process, the moving mechanism 30 is simultaneously activated, causing the ultrasonic transducer assembly to move in a scanning motion along the extension direction of the diaphragm 81. This ensures that the ultrasonic action covers the entire length of the diaphragm 81, preventing insufficient cleaning in certain areas. As contaminants are continuously shed under ultrasonic action, the flowing cleaning fluid carries them away from the surface of the diaphragm 81 and drains them into the collection area. Depending on the degree of contamination of the diaphragm 81 and the actual operating conditions, single or multiple scans can be performed to achieve the desired cleaning effect. The wiping mechanism 60 is fixed on the moving mechanism 30 and moves synchronously with it. Each wiping unit 61 of the wiping mechanism 60 extends between two adjacent membranes 81 and maintains flexible contact with the surface of the membrane 81. During the movement, it continuously wipes the surface of the membrane 81, which can further enhance the mechanical removal effect of pollutants, accelerate the removal of pollutants from the membrane surface, and thus further improve the cleaning effect.

[0053] The above cleaning steps enable online cleaning of the membrane 81 surface without disassembling the membrane module, improving cleaning efficiency and reducing system downtime.

[0054] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A scanning ultrasonic cleaning device for a non-immersion ceramic membrane module, characterized in that: include: Mounting framework; A support fixture is mounted on the mounting frame, and the support fixture carries a ceramic membrane assembly. A moving mechanism, disposed on the mounting frame, is used to move along the extension direction of multiple membrane sheets of the ceramic membrane assembly; A liquid supply mechanism is used to supply cleaning fluid to multiple membrane sheets of a ceramic membrane module; and, An ultrasonic generating mechanism is arranged opposite to the supporting fixture and includes multiple ultrasonic transducers disposed on the moving mechanism. The multiple ultrasonic transducers are grouped to form multiple ultrasonic transducer groups. Each group of ultrasonic transducers extends between two adjacent diaphragms and is disposed close to the corresponding diaphragm to form a predetermined gap with the corresponding diaphragm.

2. The scanning ultrasonic cleaning device for non-immersion ceramic membrane modules according to claim 1, characterized in that: The ultrasonic transducer group includes at least one ultrasonic transducer. When the ultrasonic transducer group includes multiple ultrasonic transducers, the multiple ultrasonic transducers are connected in series to form a group by a connector and extend along the width direction of the ceramic membrane.

3. The scanning ultrasonic cleaning device for non-immersion ceramic membrane modules according to claim 1, characterized in that: The moving mechanism includes a moving plate, a motor mounted on the mounting frame, a lead screw connected to the motor, and a lead screw nut cooperating with the lead screw. The lead screw nut is disposed in the moving plate, and the extension direction of the lead screw is consistent with the extension direction of the diaphragm. A plurality of ultrasonic transducers are disposed on the moving plate.

4. The scanning ultrasonic cleaning device for non-immersion ceramic membrane modules according to claim 3, characterized in that: The moving mechanism also includes a position sensor and a contact spring. The position sensor is disposed on the moving plate, and the contact spring is disposed on the lower part of the mounting frame. When the moving plate descends to a preset position, the position sensor contacts the contact spring to trigger a limit signal.

5. The scanning ultrasonic cleaning device for non-immersion ceramic membrane modules according to claim 1, characterized in that: The ultrasonic generating mechanism also includes an ultrasonic generating system and a power amplifier, wherein the ultrasonic generating system is connected to the ultrasonic transducer group via the power amplifier.

6. The scanning ultrasonic cleaning device for non-immersion ceramic membrane modules according to claim 1, characterized in that: The liquid supply mechanism includes a spray head and a liquid storage tank that are interconnected, with the spray head facing the supporting fixture.

7. The scanning ultrasonic cleaning device for non-immersion ceramic membrane modules according to claim 1, characterized in that: It also includes a liquid return mechanism, which is used to collect the coupling liquid flowing out of the spray area and then filter it for recycling or discharge.

8. The scanning ultrasonic cleaning device for non-immersion ceramic membrane modules according to any one of claims 1 to 7, characterized in that: It also includes a scrubbing mechanism, which is disposed on the moving mechanism. Each scrubbing unit of the scrubbing mechanism extends between two adjacent diaphragms and makes flexible contact with each of the two adjacent diaphragms.

9. A scanning ultrasonic cleaning method for a non-immersion ceramic membrane module, characterized in that: The scanning ultrasonic cleaning apparatus using any one of claims 1 to 8, employing a non-immersion ceramic membrane module as described in any one of claims 1 to 8, includes the following steps: Start the liquid supply mechanism to form a continuous liquid film of cleaning fluid on the surface of multiple membranes of the ceramic membrane module; The ultrasonic generator is activated and the moving mechanism is driven to make the ultrasonic transducer group move in a scanning manner along the extension direction of multiple membranes of the ceramic membrane group. Multiple ultrasonic transducers are respectively attached close to the corresponding diaphragms and perform ultrasonic vibration. The ultrasonic waves are transmitted to the diaphragm surface through the cleaning fluid in the set gap, forming a cavitation effect on the diaphragm surface and its adjacent area to generate a force to peel off contaminants from the diaphragm; at the same time, the peeled contaminants are carried away by the flowing cleaning fluid.

10. The scanning ultrasonic cleaning method for non-immersion ceramic membrane modules according to claim 9, characterized in that: Also includes: During the scanning process of the ultrasonic transducer group, the corresponding diaphragm is wiped by a wiping mechanism that moves synchronously with the moving mechanism.

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