A sewage treatment device for environmental protection engineering

Abstract

The present invention relates to the technical field of sewage treatment, and in particular to a sewage treatment device for environmental protection engineering. It comprises: a shell, a first pad and a second pad are fixedly connected in the shell, a first chamber and a second chamber are arranged in the shell, the first pad is located in the first chamber, the second pad is located in the second chamber, and the first chamber and the second chamber are connected through a connecting hole; a bubble generator is arranged in the shell, and the bubble generator is provided with a release hole; a filter plate is fixedly connected to the shell, and the filter plate is provided with a filter hole. The present invention blocks impurities from approaching the release hole of the bubble generator through the filter plate to prevent impurities from being deposited on the lower side of the bubble generator, resulting in the microbubbles being unable to attach to the impurities at the bottom when moving upward, causing the impurities to gradually accumulate in the second chamber, thereby blocking the release hole of the bubble generator and affecting the use efficiency of the flotation machine.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sewage treatment device for environmental protection engineering. Background Art

[0002] Sewage treatment equipment plays a vital role in environmental protection projects. Its application and development reflect the importance that humans attach to environmental protection and sustainable development. Sewage treatment equipment includes flotation machines, which are highly efficient solid-liquid separation devices.

[0003] When using an air flotation machine to float impurities in sewage, the air flotation machine uses a bubble generator to release microbubbles. The microbubbles are discharged from the release holes of the bubble generator and attached to the impurities, increasing the buoyancy of the granular impurities and flocs, thereby causing the impurities to form a layer of foam on the surface of the sewage. Finally, the foam is separated to complete the solid-liquid separation of sewage and impurities.

[0004] However, when the existing sewage is subjected to flotation treatment, heavier particulate impurities will be deposited on the lower side of the bubble generator, and the microbubbles will move upward due to their own buoyancy after being released, making it impossible for the heavier particulate impurities to adhere to the microbubbles. The deposited particulate impurities continue to accumulate and accumulate on the lower side of the bubble generator, which will cause the release holes of the bubble generator to be easily blocked by the accumulated impurities, thereby reducing the output of microbubbles, thereby affecting the use efficiency of the flotation machine and the effect of sewage treatment. Summary of the invention

[0005] In order to overcome the shortcomings pointed out in the above background technology, the present invention provides a sewage treatment device for environmental protection engineering.

[0006] The technical solution of the present invention is: a sewage treatment device for environmental protection engineering, comprising:

[0007] A shell, wherein a first cushion block and a second cushion block are fixedly connected to the shell, a first chamber and a second chamber are arranged in the shell, the first cushion block is located in the first chamber, the second cushion block is located in the second chamber, and the first chamber and the second chamber are connected through a connecting hole;

[0008] A bubble generator is arranged on the housing near the second chamber, and a plurality of release holes are arranged on the lower side of the bubble generator;

[0009] A filter plate is fixedly connected to the shell and is located in the second chamber. A plurality of groups of filter holes are arranged on the filter plate. Each group of filter holes has a plurality of filter holes and is circumferentially distributed. The connecting hole is located above the filter plate. The release hole of the bubble generator is located below the filter plate. The filter plate is used to block impurities close to the release hole of the bubble generator.

[0010] It is further explained that the aperture of the filtering hole is larger than the aperture of the releasing hole on the bubble generator, so that the bubbles discharged from the releasing hole can pass through the filtering hole smoothly.

[0011] Further explanation includes:

[0012] Agitators, the number of which is the same as the number of groups of the filter holes, are installed on the housing near the first chamber, the bubble generators are rotatably connected to rotating cylinders, the number of which is the same as the number of the agitators, and the agitators are transmitted to adjacent rotating cylinders via transmission members;

[0013] The number of cleaning plates is the same as that of the rotating cylinders, and the cleaning plates are fixed to the adjacent rotating cylinders. The cleaning plates are tightly attached to the lower side of the filter plates.

[0014] To further illustrate, the length of the cleaning plate is X, the distance from the axis of the rotating cylinder to the farthest point on the farthest filter hole of an adjacent group is Y, and X>Y.

[0015] It is further described that the filter holes are gradually inclined from top to bottom, and the inclination direction of the filter holes from top to bottom is opposite to the rotation direction of the cleaning plate.

[0016] Further explanation includes:

[0017] Guide rings, the number of which is the same as that of the rotating cylinder, are fixed to the filter plate and are provided with a plurality of guide grooves distributed circumferentially;

[0018] The guide frames, the number of which is the same as the number of the guide grooves on the guide ring, are fixedly connected to the guide ring and are used to guide impurities into the guide grooves of the guide ring.

[0019] Further explanation includes:

[0020] The elastic telescopic rods, the number of which is the same as the number of the cleaning plates, are fixedly connected to the adjacent cleaning plates, the telescopic portion of the elastic telescopic rod is fixedly connected to a limit pin, the telescopic end of the elastic telescopic rod is fixedly connected to a suction cup, the suction cup is extruded and matched with the adjacent bubble generator, and the suction cup is installed with a one-way valve;

[0021] The number of the fixing rings is the same as that of the cleaning plates and is fixed to the second cushion block. The fixing ring is fixed with circumferentially distributed limiting blocks, and the limiting blocks are limitedly matched with the adjacent limiting pins.

[0022] To further illustrate, the maximum distance that the limit pin can move up and down is A, the maximum deformation of the suction cup is B, and A>B.

[0023] It is further explained that the cleaning plate is provided with a guide groove which is connected and cooperated with the release hole on the bubble generator, and a guide channel which is connected with the adjacent guide groove is provided in the cleaning plate. The cleaning plate is provided with a plurality of exhaust holes distributed in a straight line, and the exhaust holes are connected with the adjacent guide channel.

[0024] It is further explained that the diameter of the exhaust holes distributed in a straight line gradually increases from close to the axis of the adjacent rotating cylinder to far away.

[0025] The beneficial effects of the above technical solution are as follows: 1. The present invention blocks impurities from approaching the release hole of the bubble generator through the filter plate to prevent the impurities from being deposited on the lower side of the bubble generator, resulting in the microbubbles being unable to attach to the impurities at the bottom when moving upward, causing the impurities to gradually accumulate in the second chamber, thereby blocking the release hole of the bubble generator and affecting the efficiency of the flotation machine;

[0026] 2. Through the rotation of the cleaning plate, after impurities enter the filter holes, the water flow is pushed into all adjacent filter holes in sequence with the rotation of the cleaning plate, so that the water flow in the filter holes flows from bottom to top, pushing out the impurities in the filter holes, thereby preventing the filter holes from being blocked by impurities, ensuring that microbubbles pass through the filter holes smoothly, and then ensuring the normal operation of the flotation machine;

[0027] 3. The suction cup is driven up and down by the telescopic part of the elastic telescopic rod. When there are small particles of impurities in the release hole of the bubble generator, the suction cup moves up and down and squeezes and absorbs the release hole, so that the impurities in the release hole are sucked out;

[0028] 4. Through the diversion channel, the exhaust holes away from the axis of the adjacent rotating cylinder are used to discharge microbubbles first, thereby increasing the amount of microbubbles in the sewage away from the release holes, so as to prevent some areas in the sewage from being far away from the release holes, resulting in insufficient microbubbles in the area, causing impurities in the area to be unable to be floated out of the sewage, thereby affecting the flotation effect of the flotation machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0030] Figure 2 It is a three-dimensional structural cross-sectional view of the housing of the present invention;

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the filter plate of the present invention;

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of the guide frame of the present invention;

[0033] Figure 5 is a three-dimensional structural cross-sectional view of the filter plate of the present invention;

[0034] Figure 6 It is a schematic diagram of the three-dimensional structure of the limit block of the present invention;

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the cleaning plate of the present invention;

[0036] Figure 8 It is a three-dimensional structural cross-sectional view of the cleaning plate of the present invention.

[0037] Names of the numbers in the figure: 1, shell, 101, first cushion block, 102, second cushion block, 103, first chamber, 104, second chamber, 105, connecting hole, 201, bubble generator, 301, filter plate, 302, filter hole, 401, agitator, 402, transmission member, 403, rotating cylinder, 404, cleaning plate, 501, guide ring, 502, guide frame, 601, elastic telescopic rod, 602, limit pin, 603, suction cup, 604, fixing ring, 605, limit block, 701, guide groove, 702, guide channel, 703, exhaust hole. DETAILED DESCRIPTION

[0038] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0039] Example 1: In order to solve the problem that impurities are deposited on the lower side of the bubble generator, so that the microbubbles cannot attach to the impurities at the bottom when moving upward, causing the impurities to accumulate and block the release holes on the bubble generator, please refer to Figure 1-Figure 6The present invention provides a sewage treatment device for environmental protection engineering, comprising: a shell 1, a control terminal not shown in the figure is arranged outside the shell 1, a first cushion block 101 and a second cushion block 102 are fixedly connected inside the shell 1, a first chamber 103 and a second chamber 104 are arranged inside the shell 1, before the sewage enters the second chamber 104, the sewage can first be flocculated in the first chamber 103, so as to make impurities precipitate from the sewage, the first cushion block 101 is located in the first chamber 103, and the second cushion block The first chamber 103 and the second chamber 104 are connected through the connecting hole 105. The right part of the housing 1 can be provided with a scraper type, a chain type or a spiral type scraper device to scrape impurities on the sewage surface; the bubble generator 201 is arranged at the housing 1 near the second chamber 104, the bubble generator 201 is electrically connected to the control terminal, and a plurality of release holes are arranged on the lower side of the bubble generator 201, and the release holes are used to release the bubble generator 201. The generated microbubbles are discharged into the second chamber 104; the filter plate 301 is fixed to the housing 1 and is located in the second chamber 104. The filter plate 301 is provided with two groups of filter holes 302 in the front and rear, each group of filter holes 302 has a plurality of holes and is distributed circumferentially. The height of the first cushion block 101 is higher than that of the second cushion block 102, so that the connecting hole 105 is located above the filter plate 301, and the release hole of the bubble generator 201 is located below the filter plate 301. The filter plate 301 is used to block The impurities are close to the release hole of the bubble generator 201 to prevent the impurities from being deposited on the lower side of the bubble generator 201, resulting in the microbubbles being unable to attach to the impurities at the bottom when moving upward, causing the impurities to gradually accumulate in the second chamber 104, thereby blocking the release hole of the bubble generator 201 and affecting the efficiency of the flotation machine. The aperture of the filter hole 302 is larger than the aperture of the release hole on the bubble generator 201, so that the bubbles discharged from the release hole can pass through the filter hole 302 smoothly.

[0040] The specific working principle is as follows:

[0041] When the operator needs to use the device to perform flotation treatment on sewage, the operator injects sewage and flocculant into the first chamber 103, and the sewage and flocculant react with each other. Then, the flocculated sewage flows from the connecting hole 105 to the second chamber 104. Then, the operator turns on the bubble generator 201 through the control terminal. The bubble generator 201 discharges microbubbles through its release hole. The microbubbles enter the sewage in the second chamber 104. The sewage carries the microbubbles upward and passes through the filter hole 302. The microbubbles continuously adhere to and gather on the impurities in the sewage in the second chamber 104, thereby increasing the buoyancy of the impurities in the sewage. The impurities float up and form foam on the surface of the sewage. The operator scrapes the foam through an external scraping device to achieve solid-liquid separation of sewage and impurities.

[0042] When sewage flows from the connecting hole 105 into the second chamber 104, the filter plate 301 blocks heavier impurities from moving downward to the lower side of the bubble generator 201, so that microbubbles can adhere to and gather on the heavier impurities, and prevent impurities from accumulating on the lower side of the bubble generator 201, causing its release holes to be blocked by impurities, thereby avoiding the release holes from being blocked and affecting the efficiency of the flotation machine, thereby affecting the efficiency of sewage treatment.

[0043] When the operator needs to stop using the device to treat sewage, the operator discharges the sewage out of the housing 1 and turns off the bubble generator 201 through the control terminal, and then cleans the device for the next use.

[0044] Example 2: To prevent the filter holes 302 from being blocked by impurities in the sewage, please refer to Figure 3 and Figure 5-Figure 7 The present invention further includes: an agitator 401, the number of which is the same as the number of groups of filter holes 302, installed at the housing 1 near the first chamber 103, the agitator 401 is composed of a motor and a stirring member electrically connected to the control terminal, the stirring member is located in the first chamber 103, wherein the stirring member is used to stir the sewage and flocculant in the first chamber 103 to improve the flocculation reaction efficiency of the sewage, the bubble generator 201 is rotatably connected to the rotating cylinder 403 with the same number as the agitator 401, the agitator 401 and the adjacent rotating cylinder 403 are driven by a transmission member 402, wherein the transmission member 402 is composed of a belt and two pulleys, one of which is fixedly connected to the motor output shaft of the adjacent agitator 401, and the other is fixedly connected to the adjacent rotating cylinder 403 to drive the rotating cylinder 403 to rotate; the number of cleaning plates 404 is the same as the number of rotating cylinders 403, fixedly connected to the adjacent rotating cylinders 403, and the cleaning plates 404 are connected to the filter plates 301 The cleaning plate 404 is tightly attached to the lower side of the cleaning plate 404, and a protrusion is provided on one side of the cleaning plate 404 facing the rotation direction thereof. The cleaning plate 404 pushes the water flow into all the filter holes 302 of an adjacent group in sequence through its protrusion during the rotation process. The length of the cleaning plate 404 is X, and the distance from the axis of the rotating cylinder 403 to the farthest point on the farthest filter hole 302 of an adjacent group is Y, and X>Y, so that the cleaning plate 404 can cover all the filter holes 302 in sequence during the rotation process. The filter holes 302 are gradually inclined from top to bottom, and the inclination direction of the filter holes 302 from top to bottom is opposite to the rotation direction of the cleaning plate 404, so that the water flow is pushed into all the adjacent filter holes 302 in sequence when the cleaning plate 404 rotates, so that when the cleaning plate 404 passes through the adjacent filter hole 302, the water flow in the filter hole 302 there flows from bottom to top, and the impurities in the filter hole 302 are pushed out, thereby preventing the filter hole 302 from being blocked by impurities.

[0045] The specific working principle is as follows:

[0046] During the process of sewage treatment by the operator, the operator turns on the motor of the stirrer 401 through the control terminal, the motor output shaft of the stirrer 401 rotates and drives its stirring member to rotate, and the stirrer 401 stirs the sewage and flocculant in the first chamber 103 to improve the flocculation reaction efficiency of the sewage. At the same time, the motor of the stirrer 401 drives the rotating drum 403 through the transmission member 402, and the rotating drum 403 drives the cleaning plate 404 to rotate. Figure 1 Taking the top view of as the rotation reference, the cleaning plate 404 rotates counterclockwise and squeezes the sewage near it, so that the sewage is pushed into the filtering holes 302 near the cleaning plate 404, and the sewage flows from the lower side of the filtering holes 302 to the upper side thereof, pushing out the impurities blocked in the filtering holes 302, so that when the cleaning plate 404 passes through the adjacent filtering holes 302, the water flow in the filtering holes 302 there flows from bottom to top, pushing out the impurities in the filtering holes 302, thereby preventing the filtering holes 302 from being blocked by impurities, ensuring that the microbubbles pass through the filtering holes smoothly, and further ensuring the normal operation of the flotation machine.

[0047] When the operator needs to stop using the device to treat sewage, the operator discharges the sewage out of the housing 1 and turns off the motors of the bubble generator 201 and the agitator 401 through the control terminal, and then cleans the device for the next use.

[0048] Embodiment 3: In order to reduce the probability of impurities pushed out of the filter hole 302 re-entering the filter hole 302, please refer to Figure 3 and Figure 4 The present invention further includes: guide rings 501, the number of which is the same as the number of the rotating cylinder 403, which are fixedly connected to the filter plate 301 and are provided with a plurality of guide grooves distributed circumferentially; guide frames 502, the number of which is the same as the number of the guide grooves on the guide ring 501, which are fixedly connected to the guide ring 501, and a groove is provided in the guide frame 502, which gradually tilts downward from the axis of the rotating cylinder 403 to the axis away from the rotating cylinder 403, and an inclined surface is provided on the side of the guide frame 502 opposite to the rotation direction of the cleaning plate 404, and the inclined direction of the inclined surface from top to bottom is the same as the inclined direction of the adjacent filter hole 302, so that the impurities in the filter hole 302 move along the inclined surface of the adjacent guide frame 502 after being pushed out by the water flow, and the impurities enter the groove of the guide frame 502, which is used to guide the impurities to the guide groove of the guide ring 501.

[0049] The specific working principle is as follows:

[0050] When the impurities in the filter hole 302 are pushed out by the water flow, the impurities in the filter hole 302 move along the inclined surface of the adjacent guide frame 502, so that the impurities are pushed into the groove of the guide frame 502. With the push of the cleaning plate 404 on the water flow, the water flow carries the impurities along the guide groove of the guide ring 501 to reduce the possibility of water flow and impurities flowing back into the filter hole 302, thereby reducing the possibility of the filter hole 302 being blocked.

[0051] Example 4: In order to suck out the small particles of impurities in the release hole of the bubble generator 201, please refer to Figure 5-Figure 7 The present invention further includes: elastic telescopic rods 601, the number of which is the same as the number of cleaning plates 404, which are fixed to adjacent cleaning plates 404, the telescopic portion of the elastic telescopic rod 601 is fixedly connected to the limit pin 602, the telescopic end of the elastic telescopic rod 601 is fixedly connected to a suction cup 603, the suction cup 603 is made of elastic material, the suction cup 603 is squeezed and matched with the adjacent bubble generator 201, and the suction cup 603 is installed with a one-way valve, when the suction cup 603 moves upward, the one-way valve opens, so that the sewage in the suction cup 603 is discharged through the one-way valve, and when the suction cup 603 moves downward, the one-way valve closes, so that the suction cup 603 absorbs impurities in the adjacent release hole; fixed rings 604, the number of which is the same as the number of cleaning plates 404, are fixedly connected to the second cushion block 102, and the fixed ring 604 is fixedly connected with circumferentially distributed limit blocks 605, the limit block 605 is limitedly matched with the adjacent limit pin 602. Every time the limit pin 602 passes through an adjacent limit block 605, the telescopic part of the elastic telescopic rod 601 drives the suction cup 603 to move up and down by a stroke. The maximum width of the limit block 605 is smaller than the adjacent suction cup 603, so that the suction cup 603 can squeeze and absorb all the release holes on the bubble generator 201 during the rotation process. The maximum distance that the limit pin 602 can move up and down is A, and the maximum deformation of the suction cup 603 is B, A>B, which is used to make the suction cup 603 lose contact with the bubble generator 201 when it moves downward to the extreme position, and the sewage near the suction cup 603 is exchanged with the sewage inside it, thereby reducing the amount of impurities adhering to the suction cup 603 and keeping the suction cup 603 clean.

[0052] The specific working principle is as follows:

[0053] During the rotation of the cleaning plate 404, the cleaning plate 404 drives the elastic telescopic rod 601 to rotate, and the telescopic portion of the elastic telescopic rod 601 drives the limit pin 602 to rotate, and the limit pin 602 moves up and down along the limit blocks 605 distributed in the adjacent circumferential direction, so that the telescopic portion of the elastic telescopic rod 601 moves back and forth up and down, and the telescopic end of the elastic telescopic rod 601 drives the suction cup 603 to move up and down, and each time the limit pin 602 passes through an adjacent limit block 605, the telescopic portion of the elastic telescopic rod 601 drives the suction cup 603 to move up and down a stroke, so that the suction cup 603 can move up and down during the rotation process to absorb the release holes on the bubble generator 201, so that the impurities in the release holes are sucked out, to prevent the release holes of the bubble generator 201 from being blocked by impurities, resulting in the amount of microbubbles generated being affected, thereby affecting the flotation effect of the sewage.

[0054] Example 5: In order to expand the radiation range of microbubbles and improve the working efficiency of the flotation machine, please refer to Figure 7 and Figure 8 On the basis of the above-mentioned embodiment, the present invention is further provided with the following structure: the cleaning plate 404 is provided with a guide groove 701 which is connected and matched with the release hole on the bubble generator 201, and is used to introduce a part of the microbubbles discharged from the release hole into the guide channel 702; the cleaning plate 404 is provided with a guide channel 702 which is connected with the adjacent guide groove 701; the guide channel 702 is a horizontal U-shape, and the opening of the U-shape faces the rotation axis of the adjacent cleaning plate 404; the upper part of the guide channel 702 is connected with the guide groove 701, the exhaust hole 703 is connected with the lower part of the guide channel 702, and the lower part of the guide channel 702 is not connected with the guide groove 701. The grooves 701 are connected, so that after entering the guide channel 702, the microbubbles preferentially enter the exhaust holes 703 far away from the rotation axis of the adjacent cleaning plate 404. The cleaning plate 404 is provided with a plurality of exhaust holes 703 distributed in a straight line. The sewage carries a part of the microbubbles along the guide channel 702 into the adjacent plurality of exhaust holes 703 and is discharged from the exhaust holes 703 to increase the radiation range of the microbubbles. The exhaust holes 703 are connected with the adjacent guide channel 702. The diameter of the exhaust holes 703 distributed in a straight line gradually increases from close to the axis of the adjacent rotating cylinder 403 to far away, so as to increase the amount of microbubbles in the sewage far away from the release holes.

[0055] The specific working principle is as follows:

[0056] During the rotation of the cleaning plate 404, the guide groove 701 on the cleaning plate 404 is continuously aligned with different release holes, so that a part of the microbubbles discharged from the release holes enter the guide channel 702 through the guide groove 701, and the sewage carries a part of the microbubbles along the guide channel 702 into several adjacent exhaust holes 703 and is discharged from the exhaust holes 703, so that the radiation range of the microbubbles is increased, and the diameter of the exhaust holes 703 distributed in a straight line gradually increases from the axis of the adjacent rotating cylinder 403 to the distant position, and the exhaust holes 703 far away from the axis of the adjacent rotating cylinder 403 are first discharged through the guide channel 702, thereby increasing the amount of microbubbles in the sewage far away from the release holes, so as to prevent a part of the sewage from being far away from the release holes, resulting in insufficient amount of microbubbles in the area, so that impurities in the area cannot be floated out of the sewage, thereby affecting the flotation effect of the flotation machine.

[0057] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A sewage treatment device for environmental protection engineering, characterized in that: include: A shell (1), wherein a first cushion block (101) and a second cushion block (102) are fixedly connected to the shell (1), and a first chamber (103) and a second chamber (104) are arranged in the shell (1), wherein the first cushion block (101) is located in the first chamber (103), and the second cushion block (102) is located in the second chamber (104), and the first chamber (103) and the second chamber (104) are connected via a connecting hole (105); A bubble generator (201) is arranged on the housing (1) near the second chamber (104), and a plurality of release holes are arranged on the lower side of the bubble generator (201); a filter plate (301) fixedly connected to the housing (1) and located in the second chamber (104); a plurality of groups of filter holes (302) are provided on the filter plate (301); each group of filter holes (302) has a plurality of filter holes and are distributed circumferentially; the connection hole (105) is located above the filter plate (301); the release hole of the bubble generator (201) is located below the filter plate (301); and the filter plate (301) is used to block impurities close to the release hole of the bubble generator (201); Also includes: Agitators (401), the number of which is the same as the number of groups of the filtering holes (302), are installed on the housing (1) near the first chamber (103); the bubble generators (201) are rotatably connected to rotating cylinders (403) of the same number as the agitators (401); the agitators (401) and adjacent rotating cylinders (403) are driven by transmission members (402); Cleaning plates (404), the number of which is the same as the number of the rotating cylinders (403), are fixedly connected to adjacent rotating cylinders (403), and the cleaning plates (404) are tightly attached to the lower side of the filter plates (301); Also includes: Guide rings (501), the number of which is the same as the number of the rotating cylinders (403), are fixedly connected to the filter plate (301) and are provided with a plurality of guide grooves distributed in the circumferential direction; a guide frame (502), the number of which is the same as the number of the guide grooves on the guide ring (501), fixedly connected to the guide ring (501), and used to guide impurities into the guide grooves of the guide ring (501); Also includes: The elastic telescopic rods (601) are the same in number as the cleaning plates (404) and are fixedly connected to the adjacent cleaning plates (404); the telescopic portion of the elastic telescopic rod (601) is fixedly connected to the limit pin (602); the telescopic end of the elastic telescopic rod (601) is fixedly connected to a suction cup (603); the suction cup (603) is squeezed and matched with the adjacent bubble generator (201); and the suction cup (603) is installed with a one-way valve; The number of fixing rings (604) is the same as that of the cleaning plates (404), and they are fixed to the second cushion block (102). The fixing ring (604) is fixed with circumferentially distributed limiting blocks (605), and the limiting blocks (605) are limitedly matched with adjacent limiting pins (602).

2. A sewage treatment device for environmental protection engineering according to claim 1, characterized in that: The aperture of the filtering hole (302) is larger than the aperture of the releasing hole on the bubble generator (201), so that the bubbles discharged from the releasing hole can smoothly pass through the filtering hole (302).

3. A sewage treatment device for environmental protection engineering according to claim 2, characterized in that: The length of the cleaning plate (404) is X, and the distance from the axis of the rotating cylinder (403) to the farthest point on the farthest filtering hole (302) in an adjacent group is Y, where X>Y.

4. A sewage treatment device for environmental protection engineering according to claim 3, characterized in that: The filter holes (302) are gradually inclined from top to bottom, and the inclination direction of the filter holes (302) from top to bottom is opposite to the rotation direction of the cleaning plate (404).

5. A sewage treatment device for environmental protection engineering according to claim 4, characterized in that: The maximum distance that the limit pin (602) can move up and down is A, and the maximum deformation of the suction cup (603) is B, and A>B.

6. A sewage treatment device for environmental protection engineering according to claim 5, characterized in that: The cleaning plate (404) is provided with a guide groove (701) that is connected and matched with the release hole on the bubble generator (201); a guide channel (702) that is connected with an adjacent guide groove (701) is provided in the cleaning plate (404); and the cleaning plate (404) is provided with a plurality of exhaust holes (703) distributed in a straight line; the exhaust holes (703) are connected with an adjacent guide channel (702).

7. A sewage treatment device for environmental protection engineering according to claim 6, characterized in that: The diameters of the exhaust holes (703) distributed in a straight line gradually increase from close to the axis of the adjacent rotating cylinder (403) to far away.

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