A circulating treatment device for purifying lake water quality

Abstract

The application belongs to the technical field of lake water purification biological treatment, and discloses a circulating treatment device for lake water quality purification, which comprises an air pipe located at the bottom of a lake and connected with an air pump, the lateral wall of the air pipe is fixedly connected with a plurality of conical bottom plates, the top of each conical bottom plate is fixedly connected with an aeration disc, and the lateral edge of the aeration disc is provided with biological filler, the cooperation of the elbow pipe, the arc plate and the soft scraper and other structures is used to open the second valve to ventilate during the non-aeration period, the end of the elbow pipe is obliquely cut, so that the direction of exhaust is deviated, the elbow pipe is rotationally connected with the exhaust pipe through a sleeve ring, so that when the gas is discharged from the elbow pipe, the direction of the gas discharge and the axis of the pipeline form an angle, a torque is generated, the elbow pipe is driven to rotate, and the soft scraper is continuously rotated on the surface of the aeration disc to scrape off impurities, the surface of the aeration disc is automatically cleaned, the aeration disc is effectively prevented from being blocked by impurities, and the maintenance time is prolonged.

Description

Technical Field

[0001] This invention belongs to the field of biological treatment technology for lake water purification, specifically a circulating treatment device for lake water purification. Background Technology

[0002] Currently, the purification of landscape lakes mainly utilizes microorganisms to eliminate pollutants in the water. Aerobic microorganisms use organic pollutants in the water as food, decomposing them into harmless substances such as carbon dioxide and water. Under aerobic conditions, nitrifying bacteria and nitrifying bacteria convert toxic ammonia nitrogen into nitrate. Under hypoxic conditions, denitrifying bacteria convert nitrate into nitrogen gas, which is released into the atmosphere. This cycle repeats, thus completely removing nitrogen from the water, reducing the content of organic matter, effectively removing key elements such as nitrogen and phosphorus, and inhibiting algal blooms from the source, thereby improving the self-purification capacity of the water body.

[0003] The prior art document, CN113480099A, discloses an in-situ circulation treatment process for landscape lake water, belonging to the field of landscape water circulation and purification technology. The process comprises a surface runoff collection trough, an ecological infiltration trough, an enhanced purification unit, a circulation power system, and the main body of the landscape lake. The surface runoff collection trough is located at the lowest point of the landscape lake and is connected to the ecological infiltration trough, which is located at the outermost edge of the landscape lake. The enhanced purification unit is located in the water inlet area of ​​the landscape lake. The circulation power system is located at the center of the main body of the landscape lake. Sponge concrete is used as the building material for the surface runoff collection trough and the ecological infiltration trough, providing excellent conditions for the filtration and purification of the lake water. This device is suitable for various types of urban landscape lakes. Targeting the characteristics and pollution status of urban landscape water bodies, and adhering to the design concepts of green, ecological, and environmental protection, it achieves in-situ circulation treatment of landscape lake water, improves the water quality of the landscape lake, and has advantages such as low cost, simple operation, and sustainable development.

[0004] Although the above-mentioned device achieves in-situ circulation treatment of lake water through several parts, including a surface runoff collection tank, an ecological infiltration tank, an enhanced purification unit, and a circulating power system, aeration is not required at all times during the treatment process. When the multi-stage aeration unit is not in use, impurities in the lake water will settle on the surface of the pores, which can easily cause blockage. When aeration is needed again, some pores will not be able to release bubbles, affecting the aeration efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a circulating treatment device for lake water purification that automatically cleans the surface of the aeration disc and promotes thorough mixing of water and air bubbles, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a circulating treatment device for lake water purification, comprising an air pipe located at the bottom of the lake and externally connected to an air pump, wherein a plurality of conical bottom plates are fixedly connected to the side wall of the air pipe, an aeration disc is fixedly connected to the top of the conical bottom plate, and biological packing is disposed on the side of the aeration disc, the biological packing floating in the lake water, and further comprising:

[0007] A self-rotating mechanism, which is located on the aeration disc;

[0008] A disturbance mechanism, which is connected to a self-rotating mechanism;

[0009] The self-rotating mechanism includes a sealing ring fixed at the center of the aeration disc. An exhaust pipe is slidably sleeved on the inner side of the sealing ring. An elbow is rotatably connected to the top of the exhaust pipe via a collar, and the end of the elbow is beveled. When the air pump supplies gas to the elbow through the air pipe and exhaust pipe, the gas is ejected from its beveled end. The resulting reaction force pushes the elbow to rotate around the axis of the collar, thereby causing the exhaust pipe fixed to it to rotate stably within the sealing ring. This rotational motion causes the agitation mechanism to stir. The design effectively prevents clogging of the aeration disc surface, ensuring stable and long-lasting aeration efficiency. A retaining sleeve is fixed to the outer wall of the elbow pipe, and a U-shaped frame is slidably fitted onto the outer wall of the retaining sleeve. The U-shaped frame is elastically connected to the elbow pipe via a spring. An arc-shaped plate is fixed to the bottom of the U-shaped frame, and the curvature of the arc-shaped plate matches that of the aeration disc. Several movable blades are equidistantly connected to the upper side of the arc-shaped plate via a rotating shaft. The movable blades are distributed on both sides of the rotating shaft, with one side longer than the other, and multiple movable blades are symmetrically distributed on the arc. On both sides of the plate, several arc blocks are symmetrically fixed to the two sides of the arc-shaped plate, and the ends of the arc blocks abut against the movable blades. Since the movable blades are distributed on both sides of the rotating shaft with one long and one short blade, the movable blades on both sides of the arc-shaped plate are basically in a vertical state under the action of their own weight. They will not generate buoyancy that affects the adhesion between the soft scraper and the surface of the aeration disc. During the aeration period, the thrust of the bubbles can rotate the several vertical movable blades into a horizontal overlapping state. And through the limiting abutment of the arc blocks, the rotation range of the movable blades is limited, which can stably maintain the horizontal overlapping state. At this time, the movable blades on both sides of the arc-shaped plate are horizontally overlapping each other, forming an arc-shaped plate, which greatly increases the force-bearing area and makes the soft scraper float. This avoids the soft scraper from causing any obstruction to the release of bubbles during the high-efficiency aeration stage, ensuring the maximum aeration efficiency. With the suspended soft scraper rotating, it can stir and cut the dense rising bubble flow, break up the bubbles, promote more thorough mixing of gas and lake water, and improve the gas-liquid mass transfer efficiency and oxygen utilization rate.

[0010] Preferably, the self-rotating mechanism further includes a plurality of first valves fixedly connected to the side wall of the vent pipe, and the side wall of the vent pipe is also fixedly connected to a plurality of air inlet pipes, the air inlet pipes being fixedly connected to the bottom of the exhaust pipe through second valves.

[0011] Preferably, a soft scraper is fixed to the bottom of the arc-shaped plate, and the end of the soft scraper abuts against the surface of the aeration disc. The soft scraper is also arc-shaped, and its curvature is consistent with the surface of the aeration disc. Since there is an angle between the jet direction and the pipe axis, according to Newton's third law, the resulting reaction force will form a rotational torque, driving the elbow pipe to rotate. This rotational motion is transmitted to the arc-shaped plate connected at the bottom through the U-shaped frame, thereby causing the soft scraper installed at the bottom of the arc-shaped plate to rotate in close contact with the surface of the aeration disc, effectively cleaning impurities.

[0012] Preferably, the disturbance mechanism includes a sleeve block fixed to the end of the arc-shaped plate, and the bottom of the sleeve block slidably abuts against a grooved ring block.

[0013] Preferably, the grooved ring block is fixed to the top edge of the conical base plate, and an annular groove is provided on the top of the grooved ring block.

[0014] Preferably, a sliding column is slidably connected to the middle of the sleeve block, and a slider is fixed to the bottom of the sliding column. The slider is slidably connected to the annular groove of the grooved ring block. When the arc plate rotates, it will drive the sleeve block to push the sliding column, so that the slider will continuously slide in the grooved ring block for guidance and limiting, ensuring that the soft scraper does not produce torsional displacement.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] This invention, through the combination of a bend, an arc-shaped plate, and a soft scraper, facilitates the continuous rotation of the soft scraper at the bottom of the arc-shaped plate on the surface of the aeration disc, scraping away settled impurities. During non-aeration periods, the second valve is opened to allow air to pass through. Because the end of the bend is obliquely cut, the exhaust direction is deflected. Furthermore, the bend is rotatably connected to the exhaust pipe via a collar. Therefore, when gas exits the bend, the gas exit direction forms an angle with the pipe axis, generating a torque that drives the bend to rotate. This, in turn, causes the soft scraper to continuously rotate and scrape away impurities on the surface of the aeration disc, automatically cleaning the aeration disc surface and effectively preventing the aeration disc from being clogged by impurities, thus extending maintenance time.

[0017] This invention, through the coordinated arrangement of movable blades, arc blocks, and sliding columns, facilitates the automatic floating of the soft scraper during aeration, without affecting the release of bubbles from the aeration disc. As the aeration disc continuously releases dense bubbles, the thrust of the bubbles rotates several vertical movable blades into a horizontally overlapping state. The arc blocks then stabilize this horizontal overlap, causing the movable blades to form an arc-shaped spread plate, significantly increasing the contact area. This allows the soft scraper to be pushed away from the surface of the aeration disc by the bubbles, floating within them to avoid obstructing bubble discharge. At this point, the second valve is opened, causing the elbow pipe and the soft scraper to rotate as a whole. The dense bubbles continuously agitate and diffuse outwards, disturbing the water and promoting thorough mixing of the water and bubbles. This is beneficial for the growth of microorganisms in the biological packing zone. Thus, the number of microorganisms can be controlled according to the degree of water pollution, thereby enhancing the adaptability of the device and saving energy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the circulating purification process of the present invention;

[0019] Figure 2 This is a schematic diagram showing the structural fit between the aeration disc and the air pipe of the present invention;

[0020] Figure 3 For the present invention Figure 2 A magnified view of the structure at point A in the middle;

[0021] Figure 4 This is a top view of the structure of the present invention;

[0022] Figure 5 This is a side view of the structure of the present invention;

[0023] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at point B in the middle;

[0024] Figure 7 This is a schematic diagram showing the structural fit between the movable blade and the arc block of the present invention;

[0025] Figure 8 This is a schematic diagram showing the structural fit between the arc-shaped plate and the soft scraper of the present invention;

[0026] Figure 9 This is a side view cross-sectional structural diagram of the present invention;

[0027] Figure 10 For the present invention Figure 9 A magnified schematic diagram of the structure at point C in the middle;

[0028] Figure 11 This is a schematic diagram showing the structural fit between the ferrule and the elbow pipe of the present invention.

[0029] In the picture:

[0030] 100. Ventilation pipe; 200. Conical base plate; 300. Aeration disc; 400. Biological packing material; 500. Self-rotating mechanism; 510. Elbow pipe; 520. Exhaust pipe; 530. Collar ring; 540. U-shaped frame; 550. Compression sleeve; 560. Second valve; 570. Arc plate; 580. Sealing ring; 590. Air inlet pipe; 5100. Soft scraper; 5110. First valve; 600. Disturbance mechanism; 610. Grooved ring block; 620. Sleeve block; 630. Sliding column; 640. Movable blade; 650. Rotating shaft; 660. Arc block; 670. Sliding block. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1 to 11 As shown, the present invention provides a circulating treatment device for lake water purification, including an air pipe 100 located at the bottom of the lake and externally connected to an air pump. A plurality of conical base plates 200 are fixedly connected to the side wall of the air pipe 100. An aeration disc 300 is fixedly connected to the top of the conical base plate 200. Biological packing material 400 is disposed on the side of the aeration disc 300 and floats in the lake water. The device also includes:

[0033] The self-rotating mechanism 500 is located on the aeration disc 300;

[0034] The disturbance mechanism 600 is connected to the self-rotation mechanism 500;

[0035] The self-rotating mechanism 500 includes a sealing ring 580 fixedly attached to the center of the aeration disc 300. An exhaust pipe 520 is slidably sleeved on the inner side of the sealing ring 580. An elbow pipe 510 is rotatably connected to the top of the exhaust pipe 520 via a collar 530. The end of the elbow pipe 510 is obliquely cut. A retaining sleeve 550 is fixedly attached to the outer wall of the elbow pipe 510. A U-shaped frame 540 is slidably sleeved on the outer wall of the retaining sleeve 550. The U-shaped frame 540 is elastically connected to the elbow pipe 510 via a spring. An arc-shaped plate 570 is fixedly connected to the bottom of the 540. The curvature of the arc-shaped plate 570 is adapted to the aeration disc 300. Several movable blades 640 are equidistantly connected to the upper side of the arc-shaped plate 570 through a rotating shaft 650. The movable blades 640 are distributed on both sides of the rotating shaft 650, with one side longer than the other. Multiple movable blades 640 are symmetrically distributed on both sides of the arc-shaped plate 570. Several arc blocks 660 are symmetrically fixed to both sides of the arc-shaped plate 570. The ends of the arc blocks 660 abut against the movable blades 640.

[0036] The above-mentioned scheme is adopted: In this lake water purification and circulation treatment device, the self-rotating mechanism 500 constitutes the core of dynamic operation. When the air pump delivers gas to the elbow pipe 510 through the air pipe 100 and the exhaust pipe 520, the gas is ejected from its oblique end. The resulting reaction force pushes the elbow pipe 510 to rotate around the axis of the collar 530, thereby driving the exhaust pipe 520, which is fixed to it, to rotate stably within the sealing ring 580. This rotational motion causes the disturbance mechanism 600 to agitate, effectively preventing the surface of the aeration disc 300 from clogging and ensuring the long-term stability of aeration efficiency. The system generates directional water flow through the flow promoter installed in the lake. This has a dual purpose: first, to break the thermocline layer of the water caused by temperature difference, preventing the water from stagnating and stratifying, which would lead to hypoxia in the lower layer; and second, to continuously push the polluted lake water towards the biological packing material 400 area at the core of the system. At the same time, the aeration device located in the middle of the lake is activated, and the air pump delivers compressed air to the conical bottom plate 200, which is fixedly connected to it, through the air pipe 100. When the first valve 5110 is opened, air is introduced into the upper aeration disc 300, causing it to expand and release dense, fine bubbles from the micropores on the disc surface. As these bubbles rise, they inject dissolved oxygen into the water, providing sufficient oxygen for the aerobic microorganisms attached to the biological packing material 400, thereby increasing their decomposition rate of organic pollutants and ammonia nitrogen. Simultaneously, the bubble clusters, in conjunction with the water flow propelled by the flow promoter, reach the biological packing material 400 area, forming a highly efficient reaction zone where air, water, and biofilm fully contact and mix. The polluted lake water, after being decomposed and transformed by microorganisms, is released as purified water from the other side of the packing area. This purified water then flows back to heavily polluted water areas for dilution, thus constructing a complete dynamic purification cycle that effectively enhances the water body's self-purification capacity.

[0037] like Figures 1 to 5 , Figures 9 to 11As shown, the self-rotating mechanism 500 also includes several first valves 5110 fixed to the side wall of the vent pipe 100. Several air inlet pipes 590 are also fixedly connected to the side wall of the vent pipe 100. The air inlet pipes 590 are fixedly connected to the bottom of the exhaust pipe 520 through second valves 560. A soft scraper 5100 is fixedly connected to the bottom of the arc plate 570. The end of the soft scraper 5100 abuts against the surface of the aeration disc 300. The soft scraper 5100 is also arc-shaped, and its curvature is consistent with the surface of the aeration disc 300.

[0038] Using the above scheme: When gas exits from the elbow pipe 510, it exerts a reaction force on the elbow pipe 510 that is opposite to the direction of gas movement. Because the end of the elbow pipe 510 is bent, the gas exit direction is L-shaped with the pipe axis, creating an angle. Therefore, the direction of the reaction force is not collinear with the pipe axis, thus generating a torque. At this time, the momentum changes: the gas is accelerated inside the elbow pipe 510 before exiting, and its rate of change of momentum, i.e., the direction of the force, is opposite to the gas exit direction. Since the bent part of the elbow pipe 510 rotates freely, the torque overcomes friction or inertia, driving the elbow pipe 510 to rotate. During non-aeration, the first valve 5110 is closed, and the second valve 560 is opened. Through the rotating connection of the elbow pipe 510, the airflow from the air pump no longer enters the aeration disc 300, but instead is introduced into the exhaust pipe 520 via the air inlet pipe 590, and finally exits from the oblique end of the elbow pipe 510. Because the jet direction forms an angle with the pipe axis, according to Newton's third law, the resulting reaction force generates a rotational torque, driving the elbow pipe 510 to rotate. This rotational motion is transmitted through the U-shaped frame 540 to the arc-shaped plate 570 connected at the bottom, thereby causing the soft scraper 5100 installed at the bottom of the arc-shaped plate 570 to rotate in close contact with the surface of the aeration disc 300, effectively cleaning impurities. To ensure the scraping effect, the U-shaped frame 540 and the elbow pipe 510 are connected by a spring, so that the soft scraper 5100 can always adaptively press against the surface of the aeration disc 300 during rotation.

[0039] like Figure 2 , Figures 5 to 10 As shown, the disturbance mechanism 600 includes a sleeve block 620 fixed to the end of the arc plate 570, and a grooved ring block 610 slidably abutting the bottom of the sleeve block 620; the grooved ring block 610 is fixed to the top edge of the conical base plate 200, and an annular groove is provided on the top of the grooved ring block 610; a sliding post 630 is slidably sleeved in the middle of the sleeve block 620, and a slider 670 is fixed to the bottom of the sliding post 630, and the slider 670 is slidably connected in the annular groove of the grooved ring block 610.

[0040] The above scheme is adopted as follows: During non-aeration periods, since the movable blades 640 are distributed with one long and one short on both sides of the rotating shaft 650, the movable blades 640 located on both sides of the arc plate 570 are basically in a vertical state under their own weight, and will not generate buoyancy that affects the adhesion between the soft scraper 5100 and the surface of the aeration disc 300. During the aeration period, the thrust of the bubbles can rotate several vertical movable blades 640 into a horizontal overlapping state, and the rotation range of the movable blades 640 is limited by the limiting abutment of the arc block 660, which can stably maintain the horizontal overlapping state. At this time, the movable blades 640 on both sides of the arc plate 570 are horizontally overlapping each other, forming an arc-shaped spread plate, which greatly increases the force-bearing area and makes the soft scraper 5100 float. This avoids the soft scraper 5100 causing any obstruction to the release of bubbles during the high-efficiency aeration stage, ensuring the maximization of aeration efficiency. At this point, opening the second valve 560 causes the elbow pipe 510 and the soft scraper 5100 to rotate as a whole. The dense bubbles continuously agitate the air, causing the air to diffuse outwards. The suspended soft scraper 5100, while rotating, stirs and cuts the densely rising bubble flow, breaking up the bubbles and promoting more thorough mixing of gas and lake water, thus improving gas-liquid mass transfer efficiency and oxygen utilization.

[0041] Working principle and usage process of this invention:

[0042] Firstly, the purification device can be installed in the landscape lake from the beginning of its construction to ensure the lake water remains clear and pristine, with relatively few overall pollutants. Furthermore, the area below the aeration pipe 100 is paved with concrete, preventing the growth of aquatic plants and facilitating future maintenance. This also ensures that the movable blades 640 and the grooved ring block 610 within the device are not easily entangled or blocked by algae or other plant debris. The flow promoter propels the lake water, breaking up the thermocline and preventing oxygen depletion in the lower layers caused by stagnant water stratification. The water is continuously circulated to the biological filler 400 in the following direction: Figure 1 As indicated by the arrows, the middle of the lake is continuously oxygenated by an aeration device, providing sufficient nutrients for the metabolic activities of aerobic organisms within the biological packing material 400, thereby increasing the rate of pollutant decomposition. Polluted lake water is pushed towards the biological packing material 400 by a flow promoter. During this process, air is pumped into the aeration pipe 100 via an air pump. Then, the first valve 5110 is opened, allowing oxygen to fill the conical bottom plate 200. The aeration disc 300 expands, continuously releasing air bubbles from the micropores into the water. These bubbles travel with the water flow to the area of ​​the biological packing material 400, where microorganisms continuously decompose pollutants. The purified lake water is then released from the other side of the biological packing material 400, and then the clean water is returned to the polluted side of the lake to dilute the polluted water. This cycle repeats continuously, effectively enhancing the water body's self-purification capacity.

[0043] During non-aeration periods, the first valve 5110 is closed and the second valve 560 is opened. Gas in the vent pipe 100 passes through the inlet pipe 590 to the outlet pipe 520, and then exits through the elbow pipe 510. Because the end of the elbow pipe 510 is obliquely cut, the exhaust direction will be deflected. Furthermore, the elbow pipe 510 is rotatably connected to the outlet pipe 520 via a collar 530. Therefore, when gas exits the elbow pipe 510, the gas exit direction makes an angle with the pipe axis, and the direction of the reaction force will not be collinear with the pipe axis, generating a torque that drives the elbow pipe 510 to rotate. When the elbow pipe 510 rotates, the U-shaped frame 540 fitted onto the elbow pipe 510 also rotates, and the arc-shaped plate 570 fixed to the bottom of the U-shaped frame 540 also rotates. This causes the soft scraper 5100 at the bottom of the arc-shaped plate 570 to continuously rotate on the surface of the aeration disc 300, scraping away the settled impurities. Furthermore, since the U-shaped frame 540 and the elbow pipe 510 are connected by a spring, the soft scraper 5100 remains in contact with the surface of the aeration disc 300 during rotation. Because the movable blades 640 are distributed on both sides of the rotating shaft 650, one long and one short, the movable blades 640 located on both sides of the arc plate 570 are essentially vertical under their own weight, and will not generate buoyancy that affects the fit between the soft scraper 5100 and the surface of the aeration disc 300.

[0044] During the aeration period, when the second valve 560 is closed, the elbow pipe 510 and the soft scraper 5100 remain stationary. At this time, the first valve 5110 is open, releasing gas to cause the aeration disc 300 to expand and bulge, and dense bubbles are released upwards from the surface of the aeration disc 300. Under the thrust of the bubbles, several vertical movable blades 640 can be rotated into a horizontal overlapping state. The rotation range of the movable blades 640 is limited by the limiting abutment of the arc block 660, which can stably maintain the horizontal overlapping state. At this time, the movable blades 640 on both sides of the arc plate 570 are horizontally overlapping each other, forming an arc-shaped plate, which greatly increases the force-bearing area. This causes the soft scraper 5100 to be pushed by the bubbles to separate from the surface of the aeration disc 300, avoiding affecting the release of bubbles from the aeration disc 300.

[0045] Furthermore, during the aeration period, when the second valve 560 is also opened, the soft scraper 5100 is suspended in the dense air bubbles by the movable blade 640. When the gas is discharged from the elbow pipe 510, it can drive the elbow pipe 510 and the soft scraper 5100 to rotate as a whole. After being continuously stirred by the dense air bubbles, the gas diffuses outward, promoting the full mixing of water and air bubbles. And when the arc plate 570 rotates, it will drive the sleeve block 620 to push the sliding column 630, so that the slider 670 continuously slides within the grooved ring block 610 for guidance and limitation, ensuring that the soft scraper 5100 does not twist or deviate.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circulating treatment device for lake water purification, comprising an air pipe (100) located at the bottom of the lake and connected to an external air pump, wherein a plurality of conical bottom plates (200) are fixedly connected to the side wall of the air pipe (100), an aeration disc (300) is fixedly connected to the top of the conical bottom plate (200), and biological packing material (400) is provided on the side of the aeration disc (300), the biological packing material (400) floating in the lake water, characterized in that: Also includes: A self-rotating mechanism (500) is located on an aeration disc (300); A disturbance mechanism (600) is connected to a self-rotating mechanism (500); The self-rotating mechanism (500) includes a sealing ring (580) fixed at the center of the aeration disc (300). An exhaust pipe (520) is slidably sleeved on the inner side of the sealing ring (580). A bend pipe (510) is rotatably connected to the top of the exhaust pipe (520) via a collar (530). The end of the bend pipe (510) is obliquely cut. A retainer (550) is fixed to the outer wall of the bend pipe (510). A U-shaped frame (540) is slidably sleeved on the outer wall of the retainer (550). The U-shaped frame (540) is elastically connected to the bend pipe (510) via a spring. An arc-shaped plate (570) is fixed to the bottom of the frame (540). The curvature of the arc-shaped plate (570) is adapted to the aeration disc (300). Several movable blades (640) are equidistantly connected to the upper side of the arc-shaped plate (570) through a rotating shaft (650). The movable blades (640) are distributed on both sides of the rotating shaft (650) with one side longer than the other. Multiple movable blades (640) are symmetrically distributed on both sides of the arc-shaped plate (570). Several arc blocks (660) are symmetrically fixed to both sides of the arc-shaped plate (570). The ends of the arc blocks (660) abut against the movable blades (640).

2. The circulating treatment device for lake water purification according to claim 1, characterized in that: The self-rotating mechanism (500) also includes a number of first valves (5110) fixed to the side wall of the vent pipe (100), and the side wall of the vent pipe (100) is also fixedly connected to a number of air inlet pipes (590), and the air inlet pipes (590) are fixedly connected to the bottom of the exhaust pipe (520) through second valves (560).

3. The circulating treatment device for lake water purification according to claim 2, characterized in that: A soft scraper (5100) is fixed to the bottom of the arc plate (570). The end of the soft scraper (5100) abuts against the surface of the aeration disc (300). The soft scraper (5100) is also arc-shaped, and its curvature is consistent with the surface of the aeration disc (300).

4. The circulating treatment device for lake water purification according to claim 1, characterized in that: The disturbance mechanism (600) includes a sleeve block (620) fixed to the end of the arc plate (570), and the bottom of the sleeve block (620) slides against a grooved ring block (610).

5. The circulating treatment device for lake water purification according to claim 4, characterized in that: The grooved ring block (610) is fixed to the top edge of the conical base plate (200), and the top of the grooved ring block (610) is provided with an annular groove.

6. The circulating treatment device for lake water purification according to claim 5, characterized in that: The middle part of the sleeve block (620) is slidably sleeved with a sliding column (630), and the bottom of the sliding column (630) is fixedly connected with a slider (670). The slider (670) is slidably connected in the annular groove of the grooved ring block (610).

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