Ultrasonic air floatation oil removal device

Abstract

The present application relates to sewage treatment technical field, disclose a kind of ultrasonic air flotation oil removal device, comprising: ultrasonic generator, transducer, oil removal cylinder, transfer box, liquid inlet tank, filter assembly and air flotation component;Oil removal cylinder cross section is regular polygon structure;Transfer box is arranged on oil removal cylinder, and first liquid inlet hole is formed in transfer box;Liquid inlet tank is arranged on transfer box, and first liquid inlet hole is communicated with liquid inlet tank;Filter assembly includes carousel and drive assembly, carousel rotation is arranged in liquid inlet tank and is set with first liquid inlet hole, and a plurality of through holes are formed in carousel, filter membrane is arranged in through hole, and drive assembly is used to drive carousel rotation to make filter membrane selectively cooperate with first liquid inlet hole;Air flotation component is used to drive ultrasonic transducer to move.The present application can reduce the dead angle when ultrasonic transmission, make the transmission of ultrasonic more comprehensive, energy distribution is more uniform, improve the bubble generation amount of oil-containing waste liquid away from ultrasonic transducer area, improve the effect of oil removal.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to an ultrasonic air flotation oil removal device. Background Technology

[0002] In industrial production processes such as machining, petrochemicals, and food manufacturing, large amounts of oily wastewater are generated, which will seriously pollute the environment if directly discharged. Traditional oil-water separation methods (such as gravity sedimentation, centrifugal separation, and adsorption filtration) suffer from low separation efficiency, high energy consumption, and complex equipment. Ultrasonic air flotation oil removal equipment is widely used in the oil removal field due to its high separation efficiency.

[0003] In existing ultrasonic flotation oil removal equipment, the ultrasonic transducer is usually placed in a fixed position underwater. Because the energy of ultrasonic waves attenuates as they propagate in water, the oil removal efficiency in areas far from the transducer decreases. Furthermore, excessive suspended solids in oily wastewater can affect bubble formation, leading to insufficient oil droplet adsorption. Therefore, we propose an ultrasonic flotation oil removal device. Summary of the Invention

[0004] This invention provides an ultrasonic air flotation oil removal device, which solves the technical problems in related technologies such as reduced oil removal efficiency in areas far from the ultrasonic transducer and excessive suspended solids in oily wastewater affecting bubble formation and resulting in insufficient oil droplet adsorption.

[0005] This invention provides an ultrasonic air flotation oil removal device, comprising: an ultrasonic generator and a transducer. The device further comprises: an oil removal cylinder with a vertically oriented cross-section of a regular polygon; a transfer box disposed on any side wall of the oil removal cylinder, the transfer box having a first liquid inlet hole, and a water pump inside the transfer box for pumping oily waste liquid from the transfer box into the oil removal cylinder; a liquid inlet tank disposed on the transfer box, with the first liquid inlet hole communicating with the liquid inlet tank; a filter assembly comprising: a turntable and a drive assembly, the turntable being rotatably disposed within the liquid inlet tank and conforming to the first liquid inlet hole, the turntable having multiple through holes, each through hole being sealed with a filter membrane, the drive assembly for driving the turntable to rotate so that the filter membrane selectively engages with the first liquid inlet hole; and an air flotation assembly disposed on the oil removal cylinder for moving the ultrasonic transducer.

[0006] As a further improvement of the present invention, the oil removal cylinder includes: a bottom plate, a first side plate, a second side plate, a third side plate, a fourth side plate, a fifth side plate, and a sixth side plate, wherein the first side plate to the sixth side plate are connected end to end to form a hollow regular hexahedral structure, the bottom plate is fixedly connected to the bottom of the first side plate to the sixth side plate, and the transfer box is fixedly connected to the first side plate.

[0007] As a further improvement of the present invention, the driving assembly includes: a first motor and a drive shaft, wherein the first motor is fixedly connected to the liquid inlet tank, and the two ends of the drive shaft are fixedly connected to the center of the turntable and the output end of the first motor, respectively.

[0008] As a further improvement of the present invention, the filter assembly further includes: a limiting tube concentrically arranged with the turntable, the limiting tube being fixedly connected to the inner wall of the liquid inlet tank and communicating with the first liquid inlet hole, and the outer diameter of the turntable being equal to the inner diameter of the limiting tube.

[0009] As a further improvement of the present invention, on the projection plane along the axis of the limiting tube, the first liquid inlet hole is located inside the limiting tube and is disposed near the lower edge of the limiting tube.

[0010] As a further improvement of the present invention, the plurality of through holes are distributed in a ring array about the center of the turntable.

[0011] As a further improvement of the present invention, the filter assembly further includes: a plurality of pressure plates, each of which corresponds to a plurality of filter membranes, the pressure plates being used to press the edges of the corresponding filter membranes onto the turntable, and the pressure plates being provided with a plurality of fixing members, the fixing members being used to fix the pressure plates, filter membranes and turntable.

[0012] As a further improvement of the present invention, the air flotation assembly includes: a downward-facing C-shaped frame, a screw, a second motor, and a nut seat. The C-shaped frame includes: a horizontal part and two parallel vertical parts. The bottoms of the two vertical parts are respectively fixedly connected to the first side plate and the fourth side plate. The two ends of the horizontal part are respectively fixedly connected to the tops of the two vertical parts. The horizontal part has a moving hole along its length. The screw is disposed in the moving hole, and one end of the screw extends out of the horizontal part and is fixedly connected to the output end of the second motor. The nut seat is threadedly connected to the screw and is used to drive the ultrasonic transducer to move horizontally.

[0013] As a further improvement of the present invention, the air flotation assembly further includes a cylinder, the fixed end of which is fixedly connected to a nut seat, and the telescopic end of which is fixedly connected to the ultrasonic transducer. The cylinder is used to drive the ultrasonic transducer to move up and down.

[0014] As a further improvement of the present invention, the fifth side plate includes a fixing part and a disassembly part, the disassembly part is disposed on the upper side of the fixing part, and the disassembly part and the fixing part are slidably connected in the vertical direction.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention sets the oil removal cylinder as a hollow regular polyhedral structure. When the ultrasonic waves generated by the ultrasonic transducer are reflected inside the oil removal cylinder, the incident angle of each reflection is relatively larger, and the ultrasonic wave path is more complex. This reduces dead zones in ultrasonic wave transmission, making the ultrasonic wave transmission more comprehensive and the energy distribution more uniform. In addition, the use of the air flotation component to drive the transducer to move further improves the comprehensiveness of ultrasonic wave transmission, thereby increasing the amount of bubbles generated in the oily waste liquid away from the ultrasonic transducer area, which in turn helps to improve the oil removal effect.

[0017] 2. This invention sets multiple filter membranes on a turntable, and uses the rotation of the turntable to make the multiple filter membranes take turns filtering the oily waste liquid. This can filter the suspended solids in the oily waste liquid, which is conducive to the generation of bubbles. Moreover, the filter membranes can be replaced without stopping the filtration of oily waste liquid, making it more convenient to use. Attached Figure Description

[0018] Figure 1 This is a first three-dimensional structural schematic diagram of an ultrasonic air flotation oil removal device according to an embodiment of the present invention;

[0019] Figure 2 This is a second three-dimensional structural schematic diagram of an ultrasonic air flotation oil removal device according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the main structure of an ultrasonic air flotation oil removal device according to an embodiment of the present invention;

[0021] Figure 4 This is a top view schematic diagram of an ultrasonic air flotation oil removal device according to an embodiment of the present invention;

[0022] Figure 5 This is a three-dimensional structural schematic diagram of the first main view section of an ultrasonic air flotation oil removal device according to an embodiment of the present invention.

[0023] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0024] Figure 7 This is a three-dimensional structural schematic diagram of a second main view section of an ultrasonic air flotation oil removal device according to an embodiment of the present invention;

[0025] Figure 8This is a schematic diagram of the third main view cross-sectional structure of an ultrasonic air flotation oil removal device according to an embodiment of the present invention;

[0026] Figure 9 This is a side view cross-sectional structural schematic diagram of an ultrasonic air flotation oil removal device according to an embodiment of the present invention;

[0027] Figure 10 yes Figure 9 Enlarged view of point B in the middle;

[0028] Figure 11 This is a three-dimensional structural schematic diagram of the fourth main view section of an ultrasonic air flotation oil removal device according to an embodiment of the present invention.

[0029] In the diagram: 1. Oil removal cylinder; 11. Base plate; 12. First side plate; 13. Second side plate; 14. Third side plate; 15. Fourth side plate; 16. Fifth side plate; 161. Fixing part; 162. Disassembly part; 17. Sixth side plate; 2. Transfer box; 21. First liquid inlet; 22. Water pump; 3. Liquid inlet tank; 4. Filter assembly; 41. Turntable; 411. Through hole; 42. Drive assembly; 421. First motor; 422. Drive shaft; 43. Filter membrane; 44. Limiting tube; 45. Pressure plate; 5. Air flotation assembly; 51. C-shaped frame; 511. Vertical part; 512. Horizontal part; 5121. Moving hole; 52. Screw; 53. Nut seat; 54. Second motor; 55. Cylinder; 56. Connecting seat; 6. Ultrasonic generator; 7. Ultrasonic transducer. Detailed Implementation

[0030] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0031] like Figures 1-11As shown, an ultrasonic flotation oil removal device includes an ultrasonic generator 6, an ultrasonic transducer 7, an oil removal cylinder 1, a transfer box 2, a liquid inlet tank 3, a filter assembly 4, and a flotation assembly 5. The ultrasonic generator 6 and ultrasonic transducer 7 are existing technologies. The ultrasonic generator 6 is the system's "driving power source" or "signal source," primarily responsible for generating high-frequency electrical signals to provide energy to the ultrasonic transducer 7. The ultrasonic transducer 7 is the system's "energy converter," converting the high-frequency electrical signals provided by the ultrasonic generator 6 into mechanical vibrations. The ultrasonic transducer 7 vibrates within the oily waste liquid, generating bubbles. Utilizing the adsorption and buoyancy of these bubbles, oil droplets or suspended particles adhere to the bubble surface, rising with the bubbles to the water surface to form scum, thus separating the oil and water.

[0032] The inlet tank 3, transfer tank 2, and oil removal cylinder 1 all primarily serve to store oily waste liquid. The filter assembly 4 primarily serves to filter suspended solids from the oily waste liquid.

[0033] The air flotation component 5 is mainly used to drive the ultrasonic transducer 7 to move inside the oily waste liquid, so that the ultrasonic waves can be transmitted more evenly inside the oily waste liquid, which is conducive to improving the oil removal effect.

[0034] In addition, such as Figure 1 , Figure 2 and Figure 4 As shown, the cross-sectional shape of the oil removal cylinder 1 in the vertical direction is a regular polygon structure. It should be noted that the number of sides of the regular polygon structure is at least six and is an even number. The more sides the regular polygon has, the larger the incident angle of each ultrasonic wave reflection, and the more complex the ultrasonic wave path. This reduces dead zones in ultrasonic wave transmission, resulting in more comprehensive transmission. Furthermore, a larger number of sides in the regular polygon increases symmetry, making it easier for ultrasonic waves to focus or resonate in the central region, reducing edge scattering losses, and supporting standing wave modes in more directions, resulting in a more uniform energy distribution. This increases the amount of bubbles generated away from the area of ​​the ultrasonic transducer 7 containing oily waste liquid, thereby improving the oil removal effect.

[0035] Specifically, in this embodiment, the oil removal cylinder 1 is designed with a regular hexagonal cross-section in the vertical direction. The oil removal cylinder 1 includes: a bottom plate 11, a first side plate 12, a second side plate 13, a third side plate 14, a fourth side plate 15, a fifth side plate 16, and a sixth side plate 17. It should be noted that the top of the oil removal cylinder 1 is open, which facilitates the treatment of scum on the surface of the oily waste liquid. The first side plate 12, the second side plate 13, the third side plate 14, the fourth side plate 15, the fifth side plate 16, and the sixth side plate 17 are sequentially fixedly connected end to end to form a hollow regular hexagonal structure. The bottom plate 11 is also fixedly connected to the bottom of the first side plate 12, the second side plate 13, the third side plate 14, the fourth side plate 15, the fifth side plate 16, and the sixth side plate 17, which makes the design of the oil removal cylinder 1 more robust and stable. Of course, the cross-sectional shape of the oil removal cylinder 1 in the vertical direction can also be other regular polygonal structures.

[0036] In addition, such as Figure 1 and Figure 7 As shown, the transfer box 2 can be fixedly connected to the first side plate 12, and the liquid inlet tank 3 can be fixedly connected to the side wall of the transfer box 2 away from the first side plate 12. This makes the installation of the transfer box 2 and the liquid inlet tank 3 more secure and stable, facilitating the operation of the transfer box 2. The transfer box 2 has a first liquid inlet hole 21, and the first side plate 12 has a second liquid inlet hole. The first liquid inlet hole 21 communicates with the inside of the liquid inlet tank 3. A water pump 22 for inputting the oily waste liquid in the transfer box 2 into the oil removal cylinder 1 is fixedly connected inside the transfer box 2. The water pump 22 is connected to the second liquid inlet hole through a water pipe. The tops of both the transfer box 2 and the liquid inlet tank 3 are open structures.

[0037] In use, oily waste liquid is fed into the liquid inlet tank 3 from the top. The oily waste liquid enters the transfer tank 2 through the first liquid inlet hole 21, and is then fed into the oil removal cylinder 1 by the water pump 22 through the water pipe and the second liquid inlet hole for air flotation oil removal operation.

[0038] In addition, such as Figure 1 , Figure 4 , Figure 6 and Figure 11 As shown, the filter assembly 4 includes a turntable 41 and a drive assembly 42. The turntable 41 is rotatably disposed within the liquid inlet tank 3 and is positioned to fit against the first liquid inlet hole 21. Multiple through holes 411 are provided on the turntable 41, and filter membranes 43 are sealed at each through hole 411. The filter membranes 43 are primarily used for filtering suspended solids. The drive assembly 42 drives the turntable 41 to rotate so that the filter membranes 43 selectively engage with the first liquid inlet hole 21.

[0039] The turntable 41 is rotatably set inside the liquid inlet tank 3 and is set in close contact with the first liquid inlet hole 21. Since multiple filter membranes 43 are fixedly connected to the turntable 41, the multiple filter membranes 43 can be set close to the first liquid inlet hole 21, thereby reducing the occurrence of suspended matter flowing into the first liquid inlet hole 21 from the gap between the filter membrane 43 and the adjacent inner wall of the liquid inlet tank 3, and thus better filtering of suspended matter in the liquid inlet tank 3.

[0040] The drive assembly 42 is used to rotate the turntable 41 so that the filter membrane 43 selectively engages with the first liquid inlet 21. In other words, when multiple filter membranes 43 are in use, they can work in turn, meaning that some filter membranes 43 are always in operation while others are not. This way, when cleaning is needed, the temporarily inactive filter membranes can be replaced first, while the other filter membranes continue to operate normally. This eliminates the need to stop filtering oily wastewater, thus accelerating the treatment of oily wastewater and making it more convenient to use.

[0041] Furthermore, such as Figure 6 As shown, the filter assembly 4 also includes a limiting tube 44 concentrically arranged with the turntable 41. The limiting tube 44 is fixedly connected to the inner wall of the inlet tank 3 and communicates with the first inlet hole 21. The outer diameter of the turntable 41 is equal to the inner diameter of the limiting tube 44. The limiting tube 44 can limit the turntable 41, thereby reducing the radial movement of the turntable 41 and making the turntable 41 more stable when rotating, thus making the filtration process of oily waste liquid more stable. In addition, the limiting tube 44 can also seal the gap between the turntable 41 and the adjacent inner wall of the inlet tank 3, further reducing the occurrence of oily waste liquid entering the interior of the intermediate tank 2 directly through the first inlet hole 21 without filtration.

[0042] In addition, such as Figure 11As shown, on the projection plane along the axis of the limiting tube 44, the first liquid inlet 21 is located inside the limiting tube 44 and near its lower edge. This makes the placement of the first liquid inlet 21 more reasonable. On the projection plane along the axis of the limiting tube 44, the first liquid inlet 21 is located inside the limiting tube 44 and near its lower edge. This allows the height of the oily waste liquid in the liquid tank 3 to be higher than the height of the first liquid inlet 21 but lower than the height of the limiting tube 44 during use. In other words, it ensures that when the filter membrane 43 on the lower side of the turntable 41 is working, the upper part of the filter membrane 43 does not come into contact with the oily waste liquid. This makes it more convenient to replace or clean the filter membrane 43 while the lower filter membrane 43 is working. When the lower filter membrane 43 needs cleaning or replacement, the drive assembly 42 is used to rotate the lower filter membrane 43 to the upper side.

[0043] In addition, such as Figure 11 As shown, multiple through holes 411 are arranged in a circular array around the center of the turntable 41. This makes the arrangement of the through holes 411 on the turntable 41 more uniform and comprehensive, which in turn makes the arrangement of the multiple filter membranes 43 more uniform and comprehensive. That is to say, when the turntable 41 rotates, some of the multiple filter membranes 43 are distributed on the upper side of the turntable 41, and some of the filter membranes 43 are distributed on the lower side of the turntable 41, which can better realize the alternating operation of the multiple filter membranes 43.

[0044] As an optional embodiment, such as Figure 6 As shown, the filter assembly 4 also includes multiple pressure plates 45. Each pressure plate 45 corresponds to one of the multiple filter membranes 43. The pressure plates 45 are used to press the edges of the corresponding filter membranes 43 onto the turntable 41. Multiple fixing elements are provided on the pressure plates 45 to fix the pressure plates 45, filter membranes 43, and turntable 41. The pressure plates 45 mainly function to press; the fixing elements on each pressure plate 45 can fix the pressure plates 45, filter membranes 43, and turntable 41, thus protecting the filter membranes 43 by pressing the edges of the filter membranes 43 onto the turntable 41.

[0045] In addition, such as Figure 4 and Figure 6 As shown, the drive assembly 42 includes a first motor 421 and a drive shaft 422. The first motor 421 is fixedly connected to the outer wall of the liquid inlet tank 3, and the two ends of the drive shaft 422 are fixedly connected to the center of the turntable 41 and the output end of the first motor 421, respectively. The drive shaft 422 and the output end of the first motor 421 can be fixedly connected by a coupling.

[0046] When in use, if it is necessary to change the position of the filter membrane 43, the first motor 421 is started. The first motor 421 will drive the drive shaft 422 to rotate. The rotation of the drive shaft 422 can in turn drive the turntable 41 to rotate in the limit tube 44, thereby realizing the rotation of multiple filter membranes 43.

[0047] In addition, such as Figure 1 and Figure 4 As shown, the air flotation component 5 is mounted on the oil removal cylinder 1 and is used to move the ultrasonic transducer 7. This makes the ultrasonic waves more uniform, reduces dead zones in ultrasonic wave transmission, and makes the ultrasonic waves more comprehensively transmitted.

[0048] Specifically, the air flotation assembly 5 includes: a downward-facing C-shaped frame 51, a screw 52, ​​a second motor 54, a cylinder 55, and a nut seat 53. The C-shaped frame 51 includes a horizontal portion 512 and two parallel vertical portions 511. The bottoms of the two vertical portions 511 are respectively fixedly connected to the first side plate 12 and the fourth side plate 15. Both ends of the horizontal portion 512 are respectively fixedly connected to the tops of the two vertical portions 511. The horizontal portion 512 has a moving hole 5121 along its length. The screw 52 is disposed within the moving hole 5121, and both ends of the screw 52 are rotatably connected to the two opposing inner walls of the moving hole 5121. One end of the screw 52 extends outside the horizontal portion 512 and is fixedly connected to the output end of the second motor 54. This connection can be achieved via a coupling. The nut seat 53 is threaded onto the screw 52 and is used to drive the ultrasonic transducer 7 to move horizontally. The fixed end of the cylinder 55 is fixedly connected to the nut seat 53, and the telescopic end of the cylinder 55 is fixedly connected to the connecting seat 56. The connecting seat 56 is fixedly connected to the ultrasonic transducer 7. The cylinder 55 is used to drive the ultrasonic transducer 7 to move up and down. The ultrasonic generator 6 can be fixedly installed on the vertical part 511, or it can be installed in other suitable positions.

[0049] During operation, when the liquid level in the oil removal cylinder 1 reaches the preset position, the water pump 22 stops working. The cylinder 55 is activated, its extension end extends, and through the connecting seat 56, the ultrasonic transducer 7 is inserted into the oily waste liquid. The ultrasonic generator 6 is activated, transmitting a signal to the ultrasonic transducer 7, causing it to vibrate and generate ultrasonic waves. Then, the second motor 54 is activated, driving the screw 52 to rotate. The rotation of the screw 52, ​​in turn, causes the nut seat 53 to move along the axis of the screw 52. This, in turn, through the transmission via the cylinder 55 and the connecting seat 56, causes the ultrasonic transducer 7 to move horizontally along the axis of the screw 52. This reduces dead zones in ultrasonic wave transmission, making the transmission more comprehensive and increasing the amount of bubbles generated in the area of ​​the oily waste liquid away from the ultrasonic transducer 7, thus improving the oil removal effect.

[0050] Furthermore, such as Figure 2 As shown, the fifth side plate 16 includes a fixing part 161 and a disassembly part 162. The disassembly part 162 is located above the fixing part 161, and the disassembly part 162 is slidably connected to the fixing part 161 in the vertical direction. The ultrasonic transducer 7 vibrates inside the oily waste liquid to generate a large number of bubbles. The bubbles use adsorption and buoyancy to cause oil droplets or suspended particles to adhere to the surface of the bubbles. After floating to the water surface with the bubbles to form scum, the disassembly part 162 can be slid upwards to detach from the fixing part 161, which facilitates the treatment of the scum. It should be noted that during use, the height of the oily waste liquid should be controlled so that the liquid level of the scum is higher than the height of the fixing part 161. This way, after removing the disassembly part 162, the scum can be directly discharged from the top of the fixing part 161, which is convenient to use. Of course, other existing scum removal methods can also be used to treat the scum.

[0051] The embodiments of this example have been described above. However, this example is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this example, and all of them are within the protection scope of this example.

Claims

1. An ultrasonic air flotation oil removal device, comprising: The ultrasonic generator (6) and ultrasonic transducer (7) are characterized in that the ultrasonic air flotation oil removal device further includes an oil removal cylinder (1), which has a regular polygonal cross-section in the vertical direction. The oil removal cylinder (1) includes a bottom plate (11), a first side plate (12), a second side plate (13), a third side plate (14), a fourth side plate (15), a fifth side plate (16), and a sixth side plate (17). The first side plate (12) to the sixth side plate (17) are connected end to end in sequence to form a hollow regular hexahedron structure. The bottom plate (11) is fixedly connected to the bottom of the first side plate (12) to the sixth side plate (17). A transfer box (2) is provided on any side wall of the oil removal cylinder (1). The transfer box (2) is provided with a first liquid inlet (21). A water pump (22) is provided inside the transfer box (2). The water pump (22) is used to input the oily waste liquid in the transfer box (2) into the oil removal cylinder (1). The transfer box (2) is fixedly connected to the first side plate (12). The fifth side plate (16) includes a fixing part (161) and a disassembly part (162). The disassembly part (162) is provided on the upper side of the fixing part (161), and the disassembly part (162) and the fixing part (161) are slidably connected in the vertical direction. A liquid inlet tank (3) is installed on the transfer box (2), and the first liquid inlet hole (21) is connected to the liquid inlet tank (3); The filter assembly (4) includes a turntable (41) and a drive assembly (42). The turntable (41) is rotatably disposed in the liquid inlet tank (3) and fits against the first liquid inlet hole (21). The turntable (41) has multiple through holes (411). A filter membrane (43) is sealed at the through holes (411). The drive assembly (42) is used to drive the turntable (41) to rotate so that the filter membrane (43) selectively engages with the first liquid inlet hole (21). An air flotation assembly (5) is mounted on the oil removal cylinder (1) and is used to move the ultrasonic transducer (7). The air flotation assembly (5) includes: a downward-facing C-shaped frame (51), a screw (52), a second motor (54), and a nut seat (53). The C-shaped frame (51) includes: a horizontal part (512) and two parallel vertical parts (511). The bottoms of the two vertical parts (511) are fixedly connected to the first side plate (12) and the fourth side plate (15), respectively. The two ends of the horizontal part (512) are fixedly connected to the tops of the two vertical parts (511), respectively. The horizontal part (512) has a moving hole (5121) along its length. The screw (52) is disposed in the moving hole (5121), and one end of the screw extends out of the horizontal part (512) and is fixedly connected to the output end of the second motor (54). The nut seat (53) is threadedly connected to the screw (52). The nut seat (53) is used to drive the ultrasonic transducer (7) to move horizontally. The air flotation assembly (5) also includes a cylinder (55), the fixed end of which is fixedly connected to the nut seat (53), and its telescopic end is fixedly connected to the ultrasonic transducer (7). The cylinder (55) is used to drive the ultrasonic transducer (7) to move up and down.

2. The ultrasonic air flotation oil removal device according to claim 1, characterized in that, The drive assembly (42) includes a first motor (421) and a drive shaft (422). The first motor (421) is fixedly connected to the liquid inlet tank (3), and the two ends of the drive shaft (422) are fixedly connected to the center of the turntable (41) and the output end of the first motor (421), respectively.

3. The ultrasonic air flotation oil removal device according to claim 1, characterized in that, The filter assembly (4) further includes a limiting tube (44) concentrically arranged with the turntable (41), the limiting tube (44) being fixedly connected to the inner wall of the liquid inlet tank (3) and communicating with the first liquid inlet hole (21), and the outer diameter of the turntable (41) being equal to the inner diameter of the limiting tube (44).

4. The ultrasonic air flotation oil removal device according to claim 3, characterized in that, On the projection plane along the axis of the limiting tube (44), the first liquid inlet (21) is located inside the limiting tube (44) and is disposed near the lower edge of the limiting tube (44).

5. The ultrasonic air flotation oil removal device according to claim 1, characterized in that, The multiple through holes (411) are arranged in a ring array about the center of the turntable (41).

6. The ultrasonic air flotation oil removal device according to claim 1, characterized in that, The filter assembly (4) further includes: multiple pressure plates (45), each of which corresponds to a multiple filter membranes (43). The pressure plates (45) are used to press the edges of the corresponding filter membranes (43) onto the turntable (41). Multiple fasteners are provided on the pressure plates (45), which are used to fix the pressure plates (45), filter membranes (43), and turntable (41).

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