Integrated device of air curtain dam front aeration and biological purification

Abstract

The application relates to the technical field of water treatment and discloses an integrated device for air-shield dam front aeration and biological purification, which comprises a purification pool and a shield plate, further comprises a gas conveying pipe fixedly connected in the interior of the purification pool, the top of a split driving frame is located above the oblique rubber sheet, the top of a gas flow piece is located above the oblique rubber sheet, the oblique rubber sheet is always in an aeration state when the gas conveying pipe supplies gas, the split driving frame drives the gas flow piece to move up and down when rotating, and the gas flow piece intermittently aerates when moving up and down. Through the whole process of continuous oblique aeration of the oblique rubber sheet, dissolved oxygen can be stably supplemented to the water body, multi-dimensional three-dimensional water body convection is formed, dissolved oxygen in the pool is uniformly distributed, a micro-anoxic environment required for denitrification is constructed, total nitrogen removal efficiency of the device is improved, the two aeration modes are complementary, the requirements of aerobic nitrification and anoxic denitrification are considered, the water purification effect is optimized, and the device is suitable for dam front water body working conditions with high pollution and high algal load.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and in particular to an integrated device for aeration and biological purification in front of an air shield dam. Background Technology

[0002] Air-shield dams can regulate river water levels, store water to form a reservoir in front of the dam, and create a stable water area and landscape water surface. However, the water retention time is prolonged, and nitrogen and phosphorus enrichment can easily induce eutrophication. Therefore, a biological purification device is installed to circulate and purify the water in the reservoir area, relying on microorganisms to degrade pollutants and inhibit algae growth.

[0003] However, in existing technologies, the water flow velocity in front of the dam is slow and the external disturbance is poor, making it easy for algae to accumulate and settle to form ultrafine viscous sludge, creating a special water environment. The ultrafine sludge continues to settle to the bottom of the pool, and single-layer aeration can only achieve local water disturbance. Fixed flow blind zones are formed at the corners of the aeration chamber and around the partitions, and the sludge continues to accumulate and undergo anaerobic fermentation, continuously releasing endogenous pollutants such as ammonia nitrogen and sulfides, aggravating the black and odorous water. After a large number of algae die off in the reservoir area, they mix with the bottom sediment to form highly viscous algal sludge, which easily adheres to and blocks the aeration openings, resulting in uneven distribution of air volume along the chamber. In some areas, the dissolved oxygen is lower than the survival threshold of microorganisms, the activity of nitrifying bacteria decreases, and some areas continuously have excessive aeration, increasing the energy consumption of the blower. At the same time, it causes large-scale abnormal shearing of biofilm. Existing aeration pipelines are mostly arranged horizontally or vertically, and the shear strength between the airflow and the water is insufficient. The attached algal sludge cannot be peeled off autonomously by hydraulic conditions, and it is necessary to shut down the machine, drain the water, and carry out manual cleaning, which significantly increases the operation and maintenance costs. Traditional aeration methods supply equal amounts of air throughout the entire chamber, which cannot match the pollution gradient along the water body in front of the dam. The inlet section has the highest algae and organic load, and the dissolved oxygen supply cannot meet the degradation requirements. The dissolved oxygen in the outlet section is consistently high, making it difficult to create the micro-anoxic environment required for denitrification. The total nitrogen removal efficiency of the device is consistently low. Currently, common optimization methods in the industry are limited to single modifications such as replacing aeration elements, adding variable frequency fans, and adding simple guide plates. They do not have an integrated structural design for the specific working conditions of high algae and fine silt coexisting in the water body in front of the dam, and cannot stably meet the normal circulating water purification requirements of the reservoir area in front of the dam. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated aeration and biological purification device in front of the air shield dam to solve the problem of siltation and accumulation during aeration in the reservoir area.

[0005] This invention proposes an integrated aeration and biological purification device for an air shield dam, comprising a purification tank and a shield plate, an air supply pipe fixedly connected inside the purification tank, multiple aerators equidistantly arranged and fixedly connected to the air supply pipe, an inclined rubber sheet snapped onto the top of the aerator, a drive frame rotatably connected inside the aerator, an airflow component slidably connected inside the drive frame, a microporous rubber disc snapped onto the top of the drive frame, a strap fixedly connected to one side of the shield plate, an airbag connected to the lower half of the shield plate, a rib plate fixedly connected to the other side of the shield plate, multiple guide plates equidistantly arranged and fixedly connected to the surface of the rib plate, and a connecting plate connecting the multiple guide plates. The top of the drive frame is located above the inclined rubber sheet, and the top of the airflow component is located above the inclined rubber sheet. When the air supply pipe supplies air, the inclined rubber sheet is always in an aeration state. When the drive frame rotates, it drives the airflow component to move up and down, and the airflow component performs intermittent aeration when it moves up and down.

[0006] Furthermore, the aerator includes an air guide pipe fixedly connected to the air supply pipe, and an outer disc fixedly connected to the outside of the air guide pipe. The air guide pipe has multiple flow holes opened at equal angles.

[0007] Furthermore, the drive frame includes a rotating tube rotatably connected inside the air duct, a disc fixedly connected to the top of the rotating tube, an impeller assembly fixedly connected to the bottom of the rotating tube, an arc block fixedly connected to the top surface of the disc, and a brush strip assembly snapped onto the outside of the disc. The top of the arc block is arc-shaped, and the top and bottom of the brush strip assembly gradually curve.

[0008] Furthermore, the airflow component includes a sliding tube slidably connected inside the rotating tube, an air plate fixedly connected to the top of the sliding tube, a semi-circular ring fixedly connected to the bottom of the air plate, multiple side strips equidistantly arranged and fixedly connected to the outside of the air plate, and multiple annular strips arranged and connected to the side strips.

[0009] Furthermore, the two ends of the semicircular ring are set to be arc-shaped, the diameter of the plurality of annular strips gradually decreases as they approach the center of the slide tube, and the annular strips gradually tilt away from the center of the slide tube from the middle to both sides.

[0010] Furthermore, a shaft bracket is provided at the bottom of the air guide tube, and a spring is connected between the shaft bracket and the slide tube. When the spring is in an undeformed state, the top of the shaft bracket is located inside the bottom of the slide tube.

[0011] Furthermore, the diameter of the top end of the air guide tube is smaller than the diameter of the outer disk, and multiple inclined plates are connected at equal angles between the top end of the air guide tube and the outer disk. The flow hole is located above the outer disk, and the inclined rubber sheet is installed in the area of ​​the inclined plate.

[0012] Furthermore, the brush strip assembly covers the area of ​​the inclined rubber sheet, the annular strip is located above the microporous rubber disc, and the diameter of each of the annular strips is larger than the diameter of the microporous rubber disc and smaller than the diameter of the inclined rubber sheet.

[0013] Furthermore, the connecting plate is provided with a plurality of square slots at equal intervals, and the guide plates are connected to a return flow baffle. The middle part of the return flow baffle is recessed towards the end of the shield plate away from the airbag. Two guide plates are spaced apart between two adjacent return flow baffles. The number of square slots is equal to the number of return flow baffles and their positions correspond. The return flow baffles prevent water from flowing out through the square slots.

[0014] The beneficial effects of this invention are:

[0015] 1. Through continuous oblique aeration via inclined rubber sheets, dissolved oxygen can be stably replenished to the water body, forming multi-dimensional three-dimensional water convection, evenly distributing dissolved oxygen in the pool, ensuring the activity of nitrifying bacteria, degrading algae and organic matter in the water, inhibiting anaerobic blackening and odor problems in the water body, and consolidating the basic purification effect. At the same time, the drive frame rotates autonomously by the thrust of the aeration airflow, driving the airflow components to move up and down in a regular manner. With the help of the spring reset structure, intermittent aeration is achieved, dynamically adjusting the local dissolved oxygen concentration in the water body, creating the micro-anoxic environment required for denitrification, and improving the total nitrogen removal efficiency of the device. The two aeration modes work together and complement each other, taking into account the needs of aerobic nitrification and anoxic denitrification reactions, optimizing the water purification effect, and adapting to the working conditions of the water body in front of the dam with high pollution and high algae load.

[0016] 2. The gradually curved brush strips on the outer side of the drive frame can fully cover the aeration surface of the inclined rubber sheet. As the equipment rotates continuously, it completes dynamic sweeping of the entire area, removing the thin layer of algae and fine silt adhering to the surface of the rubber sheet, stabilizing the aeration opening and angle of the inclined spray, and preventing the aeration gaps from being blocked and solidified by pollutants. At the same time, the gradually changing ring strips of the internal air flow components form a three-dimensional radial mesh structure, which can cut and disturb the water body at multiple angles, break the stagnant water zone above the equipment, and inhibit the adhesion and caking of pollutants on the disc surface. In addition, the inclined jet airflow of the inclined rubber sheet can continuously flush the aeration port, and the port can be autonomously peeled off with algae by relying on hydraulic shear force. The triple self-cleaning mechanism works together to improve the stability of equipment operation.

[0017] 3. The impeller assembly with the split drive frame is built into the aeration airflow channel. It can achieve autonomous and continuous rotation by fully utilizing the airflow thrust output from the air supply pipe. No external motor or transmission equipment is required, which reduces equipment energy consumption and operating costs. At the same time, the impeller installation method can be flexibly adjusted according to the actual water conditions. Concentric installation is suitable for conventional reservoirs with uniform pollution, ensuring regular and stable aeration cycles. Eccentric installation is suitable for complex conditions with turbulent flow and local pollution accumulation, eliminating transmission play and rhythm disorder problems, and has strong adaptability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the biological purification device of the present invention;

[0019] Figure 2 This is a schematic diagram of the gas pipeline structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the aerator of the present invention;

[0021] Figure 4 This is a cross-sectional view of the aerator of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the drive frame of the present invention;

[0023] Figure 6 This is a schematic diagram of the airflow component of the present invention;

[0024] Figure 7 This is a schematic diagram of the aerator of the present invention;

[0025] Figure 8 This is a schematic diagram of the air-shield dam structure of the present invention;

[0026] Figure 9 This is a cross-sectional view of the air-shield dam of the present invention;

[0027] Figure 10 This is a schematic diagram of the structure of the guide plate of the present invention.

[0028] In the picture:

[0029] 1. Purification tank; 2. Air supply pipe; 3. Aerator; 31. Air guide pipe; 311. Flow hole; 312. Inclined plate; 32. Outer disc; 301. Shaft bracket; 302. Spring; 4. Inclined rubber sheet; 5. Drive frame; 51. Rotary pipe; 52. Disc; 53. Impeller assembly; 54. Arc block; 55. Brush strip assembly; 6. Air flow component; 61. Sliding pipe; 62. Air disc; 63. Semi-circular ring; 64. Side strip; 65. Annular strip; 7. Microporous rubber disc; 8. Shield plate; 9. Pull belt; 10. Airbag; 11. Rib plate; 12. Guide plate; 121. Return flow baffle plate; 13. Connecting plate; 131. Square slot. Detailed Implementation

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0031] Reference Figures 1-10This invention provides an integrated aeration and biological purification device for an air shield dam, comprising a purification tank 1 and a shield plate 8, an air supply pipe 2 fixedly connected inside the purification tank 1, multiple aerators 3 equidistantly arranged and fixedly connected to the air supply pipe 2, an inclined rubber sheet 4 snapped onto the top of the aerator 3, a drive frame 5 rotatably connected inside the aerator 3, an air flow component 6 slidably connected inside the drive frame 5, a microporous rubber disc 7 snapped onto the top of the drive frame 5, and a pull strap 9 fixedly connected to one side of the shield plate 8. The airbag 10 in the lower half of the shield plate 8 is fixedly connected to the rib plate 11 on the other side of the shield plate 8. Multiple guide plates 12 are equidistantly arranged and fixedly connected to the surface of the rib plate 11, and a connecting plate 13 is connected between the multiple guide plates 12. The top of the drive frame 5 is located above the inclined rubber sheet 4, and the top of the air flow component 6 is located above the inclined rubber sheet 4. When the air supply pipe 2 supplies air, the inclined rubber sheet 4 is always in an aeration state. When the drive frame 5 rotates, it drives the air flow component 6 to move up and down. When the air flow component 6 moves up and down, it performs intermittent aeration.

[0032] Multiple square slots 131 are equidistantly provided on the connecting plate 13. A return flow baffle 121 is connected between the flow guide plates 12. The middle part of the return flow baffle 121 is recessed towards the end of the shield plate 8 away from the airbag 10. Two flow guide plates 12 are spaced apart between two adjacent return flow baffles 121 to form an intermittent blocking and diversion. The number of square slots 131 and the return flow baffle 121 are equal and their positions correspond. The return flow baffle 121 blocks the water flow from being led out through the square slots 131.

[0033] The dispersed guide plates 12 are connected into an integral load-bearing frame by the connecting plate 13, which can quickly disperse the impact force of the water flow at a single point and then transmit it to the entire rib plate 11, effectively balancing the stress of the overall structure, improving the overall rigidity and deformation resistance of the outer guide structure, and reducing the probability of component damage. The square slots 131 that are equally spaced on the connecting plate 13, together with the intermittently arranged backflow baffles 121, form a directional hydraulic control structure, which uses the principle of fluid counter-flow to achieve buffering and shock reduction. The backflow baffles 121 adopt a structure that is concave towards the shield plate 8 and corresponds one-to-one with the square slots 131. When the forward flow passes through the square slots 131, it is limited and guided by the concave baffles and can spontaneously form a local reverse backflow, which can regulate the flow pattern on the outside of the dam body, avoid turbulence and eddies from causing continuous impact on the dam body, and improve the overall impact resistance and operational durability of the air shield dam.

[0034] Specifically, the purification tank 1 features a well-organized internal cavity structure, which is adapted to the evenly arranged air supply pipe 2 and multiple sets of aerators 3. The air supply pipe 2 can stably and continuously deliver air to each aerator 3. The inclined rubber sheet 4, which is snapped onto the top of the aerator 3, forms a continuous aeration system. The equipment maintains a stable aeration state throughout the entire operation. The inclined jet structure enhances the shear strength between the airflow and the water, continuously flushing away the highly viscous algae and sludge adhering to the aeration ports. The algae and sludge are autonomously detached by hydraulic action, forming multi-dimensional water convection, evenly distributing dissolved oxygen in the tank, and ensuring the stable activity of nitrifying bacteria. The rubber material can adaptively adjust the aeration gap according to air pressure, effectively reducing aeration energy consumption while stabilizing the purification effect. The rotating drive frame 5, which is installed inside the aerator 3, extends above the inclined rubber sheet 4, effectively blocking suspended algae and sludge and reducing the risk of algae and sludge buildup. When the internal moving mechanism is blocked, the drive frame 5 can rotate autonomously by relying on the thrust generated by aeration. During operation, it can continuously drive the internally assembled airflow component 6 to make regular up-and-down reciprocating movements. The drive frame 5 can divert and disperse the concentrated aeration airflow, avoiding abnormal biofilm shedding caused by local high-intensity aeration, effectively maintaining the integrity of the biological purification membrane structure, and ensuring the long-term stable operation of the biological purification system. The airflow component 6, which is slidably assembled inside the drive frame 5, slides up and down regularly with the rotation of the drive frame 5 to complete intermittent aeration operations. It forms a complementary composite aeration system with the continuous aeration of the inclined rubber sheet 4, creating a micro-anoxic environment required for denitrification, improving the total nitrogen removal efficiency of the device. At the same time, the reciprocating movement of the airflow component 6 can enhance the composite disturbance of the water body, assist in the removal of algae and sludge, balance the aeration throughout the entire area, and effectively avoid the problem of local anoxic purification failure.

[0035] Reference Figures 3-7 The aerator 3 includes an air guide pipe 31 fixedly connected to the air supply pipe 2, and an outer plate 32 fixedly connected to the outside of the air guide pipe 31. Multiple flow holes 311 are opened at equal angles on the air guide pipe 31.

[0036] The diameter of the top end of the air guide tube 31 is smaller than the diameter of the outer disk 32. Multiple inclined plates 312 are connected at equal angles between the top end of the air guide tube 31 and the outer disk 32. The flow hole 311 is located above the outer disk 32. The inclined rubber sheet 4 is installed in the area of ​​the inclined plate 312.

[0037] Specifically, the flow holes 311 arranged at equal angles around the circumference of the air guide pipe 31 balance the aeration pressure and output at various points, improving the uniformity of dissolved oxygen in the entire water body. The outer disc 32 is sleeved on the outside of the air guide pipe 31, and the diameter of the top end of the air guide pipe 31 is smaller than the diameter of the outer disc 32, forming a hierarchical structure. At the same time, the outer disc 32 is located below the top end of the air guide pipe 31, and the inclined plate 312 connects the two, forming an inclined structure. The inclined rubber sheet 4 is installed in the area of ​​the inclined plate 312, utilizing the inclination of the inclined plate 312. The regular layout provides a standardized assembly base for the inclined rubber sheet 4, limiting the installation angle and opening and closing gap of the rubber sheet, ensuring that the inclined air outlet angle of each aeration point is uniform, and avoiding air leakage and uneven air outlet caused by assembly deviation. At the same time, the inclined aeration area enclosed by the inclined plate 312 can guide the airflow output from the flow hole 311 to form an inclined jet water flow, improve the shear strength between the airflow and the water body, and autonomously peel off the attached trace algae mud by relying on water impact, so as to achieve self-cleaning of the aeration port.

[0038] In addition, the diameter at the connection point between the bottom of the air duct 31 and the air supply pipe 2 is larger than that of other areas of the air duct 31 to ensure sufficient air supply.

[0039] Reference Figures 3-6 The drive frame 5 includes a rotating pipe 51 rotatably connected inside the air duct 31, a disc 52 fixedly connected to the top of the rotating pipe 51, an impeller assembly 53 fixedly connected to the bottom of the rotating pipe 51, an arc block 54 fixedly connected to the top surface of the disc 52, and a brush strip assembly 55 snapped onto the outside of the disc 52. The top of the arc block 54 is arc-shaped, and the top of the brush strip assembly 55 gradually curves to the bottom.

[0040] Specifically, the rotating pipe 51 is rotatably connected inside the air guide pipe 31, forming a built-in coaxial rotation layout. Relying on the cavity of the air guide pipe 31, a closed and stable rotation trajectory is formed, avoiding the influence of external water bodies and ensuring the long-term smooth operation of the entire transmission structure. The impeller assembly 53 is directly located inside the aeration airflow channel and can achieve autonomous continuous rotation using the thrust generated by the airflow ejected from the flow holes 311. The disc 52 serves as structural support and trajectory limiter. As a unified assembly base for the top arc block 54 and the outer brush strip assembly 55, the disc 52 effectively improves the integration and synchronization of the entire dynamic structure, ensuring dynamic aeration and circumferential cleaning. The cleaning action is stable and coordinated. During continuous rotation, the arc block 54 can push the upper airflow component 6 to complete the lifting and reciprocating action. The brush strip assembly 55, which is snapped onto the outside of the disc 52, adopts a streamlined structure that gradually bends from top to bottom, adapting to the circumferential curved surface of the aeration cavity, realizing dynamic self-cleaning throughout the entire area. The gradually bending structure can contact the expanding oblique rubber sheet 4, which sweeps and brushes in a conforming manner, continuously scraping away the sticky algae and mud attached to the cavity. At the same time, the rotation generates shear force, and the resulting circumferential turbulent water flow strengthens local water convection, inhibits bottom sedimentation and siltation, and ensures that the aeration channel is unobstructed throughout the entire process from the inside, extending the maintenance-free cycle of the equipment.

[0041] Reference Figures 1-7 The airflow component 6 includes a sliding tube 61 slidably connected inside the rotating tube 51, an air plate 62 fixedly connected to the top of the sliding tube 61, a semi-circular ring 63 fixedly connected to the bottom of the air plate 62, multiple side strips 64 equidistantly arranged and fixedly connected to the outside of the air plate 62, and multiple annular strips 65 arranged and connected to the side strips 64.

[0042] The two ends of the semicircular ring 63 are set to be arc-shaped, and the diameter of the multiple ring bars 65 gradually decreases as they approach the center of the slide tube 61. The ring bars 65 gradually tilt away from the center of the slide tube 61 from the middle to both sides.

[0043] A shaft bracket 301 is provided at the bottom of the air guide tube 31. A spring 302 is connected between the shaft bracket 301 and the slide tube 61. When the spring 302 is in an undeformed state, the top of the shaft bracket 301 is located inside the bottom of the slide tube 61, forming a closed state.

[0044] Specifically, the bottom of the shaft bracket 301 serves as a fixed bearing base for the spring 302, limiting its radial displacement and torsional deformation, ensuring that the spring 302 always operates along a coaxial extension and contraction trajectory. Furthermore, the spring 302 ensures the stable reset of the airflow component 6. After the arc block 54 rotates, it contacts the semi-circular ring 63, using extrusion force to cause the airflow component 6 to slide upwards, stretching the spring 302. This causes the bottom end of the slide tube 61 to separate from the top end of the shaft bracket 301, opening the aeration port for intermittent aeration. When the arc block 54 disengages from the contact with the rotating disc... Upon contact, spring 302 releases its elastic potential energy, pulling slide tube 61 back to its original position. Shaft bracket 301 is inserted into the bottom of slide tube 61, closing the aeration passage. Continuous aeration serves as a basic air source guarantee, providing stable and comprehensive replenishment of dissolved oxygen in the water body. This meets the aerobic degradation and nitrification requirements of algae and organic matter in the high-load water section ahead of the dam, continuously suppressing anaerobic blackening and odor, and ensuring the basic purification effect of the water body. Intermittent aeration relies on the split drive frame 5 and the reset of spring 302 to achieve irregular on / off gas distribution, dynamically adjusting the local dissolved oxygen concentration and effectively improving the device's total nitrogen removal capacity.

[0045] Due to the influence of airflow, the impeller assembly 53 can be eccentrically installed, making the rotation position singular and forming a more regular compression. Concentric installation results in uniform force and stable speed, which is suitable for conventional working conditions where the pollution distribution in the reservoir area is uniform and the algae and sludge accumulation is stable. It can ensure regular opening and closing cycles of intermittent aeration and uniform air distribution. Eccentric installation is suitable for complex working conditions with large pollution gradients, turbulent flow, and localized algae and sludge accumulation. The impeller forms a single rotational positioning under the action of airflow, generating a regular compression and linkage structure, which can eliminate transmission play and rhythm disorder problems, making the start and stop of intermittent aeration more stable and suitable for the stable purification needs of complex polluted water bodies.

[0046] Meanwhile, the annular strip 65 gradually slopes and diffuses from the center to both sides away from the center of the slide tube 61. Combined with the gradually changing diameter layout of smaller inner diameter and larger outer diameter, it forms a three-dimensional radial grid structure. The outwardly inclined diffusion structure can break the local stagnant water zone above the component. Compared with the traditional horizontal straight structure, it can cut and disturb the surrounding water at multiple angles, driving the water above the microporous rubber disc 7 to flow radially. This inhibits the adhesion and caking of pollutants on the microporous disc surface from the source, reducing the risk of microporous blockage. At the same time, the vertical movement cuts the water, dispersing the concentrated airflow that rises vertically, and transforming the single bundle of airflow into a divergent and uniform airflow. This effectively improves the dissolved oxygen efficiency of the water and prevents impurities from accumulating and getting stuck in the gaps of the annular strip 65, ensuring the long-term stable and low-maintenance continuous operation of the composite aeration system.

[0047] Reference Figures 2-7 The brush strip group 55 covers the area of ​​the inclined rubber sheet 4, and can dynamically sweep the entire aeration working surface of the inclined rubber sheet 4 during rotation. It cleans the thin layer of algae and fine sludge adhering to the surface of the rubber sheet in real time, and prevents the inclined aeration gaps from being blocked and solidified by the mucus and algae. It continuously ensures the stability of the aeration opening and spray angle of the inclined rubber sheet 4, and ensures that the airflow shear force and self-cleaning ability of continuous aeration do not decrease. It ensures the long-term unobstructed flow of the basic aeration channel from the outside. The annular strip 65 is located above the microporous rubber disc 7. The diameter of multiple annular strips 65 is larger than the diameter of the microporous rubber disc 7 and smaller than the diameter of the inclined rubber sheet 4, forming a layered protection and disturbance structure from the inside to the outside and from the bottom to the top. It enhances the adaptability and structural synergy, forms an effective shear force, and avoids affecting the aeration convergence.

[0048] The working principle of this invention is as follows: External air source is evenly distributed to the interior of each air guide pipe 31 via air supply pipe 2. Part of the airflow is transported outward through the circumferential flow holes 311 of the air guide pipe 31, forming a continuous oblique jet airflow at the oblique rubber sheet 4, constituting a continuous aeration system. The obliquely jetted airflow generates a high-intensity shearing action with the water body. At the same time, the airflow from air supply pipe 2 impacts the impeller assembly 53 inside the air guide pipe 31, driving the drive frame 5 to rotate continuously coaxially around the rotating pipe 51. During the rotation, the brush strip assembly 55 on the outer side of the disc 52 follows the circumferential movement, sweeping the entire aeration working surface of the oblique rubber sheet 4, continuously scraping away the accumulated algae and mud on the surface, preventing the aeration gaps from clogging. The arc block 54 on the top surface of the disc 52 periodically pushes the semi-circular ring 63 along the circumferential trajectory. When the arc block 54 pushes up the semicircular ring 63, it pushes the slide tube 61 to slide upward along the inside of the rotating tube 51, stretching the spring 302. The bottom end of the slide tube 61 separates from the top end of the shaft frame 301, opening the airflow channel. The airflow is released upward through the slide tube 61 and the air plate 62 to carry out intermittent aeration. After the arc block 54 rotates past the contact position, the spring 302 rebounds and pulls the slide tube 61 downward to reset. The top end of the shaft frame 301 re-extends into the bottom end of the slide tube 61 to close the airflow channel, and the intermittent aeration stops. As the drive frame 5 continues to rotate, the airflow component 6 rises and falls in a cycle to achieve periodic intermittent aeration. With the continuous dynamic cleaning and disturbance of the brush strip group 55 and the ring strip 65, the integrated operation of aeration and oxygenation, algal sludge self-cleaning, and biological denitrification is achieved, ensuring the long-term purification effect of the water body in front of the dam.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An integrated aeration and biological purification device for an air-shield dam, comprising a purification pool (1) and a shield plate (8), characterized in that: It also includes an air supply pipe (2) fixedly connected inside the purification tank (1), multiple aerators (3) equidistantly arranged and fixedly connected to the air supply pipe (2), an inclined rubber sheet (4) snapped onto the top of the aerator (3), a drive frame (5) rotatably connected inside the aerator (3), an air flow component (6) slidably connected inside the drive frame (5), a microporous rubber disc (7) snapped onto the top of the drive frame (5), a pull strap (9) fixedly connected to one side of the shield plate (8), an airbag (10) connected to the lower half of the shield plate (8), and a fixed connection to the other side of the shield plate (8). The rib (11) has multiple guide plates (12) that are equidistantly arranged and fixedly connected to the surface of the rib (11), and a connecting plate (13) connecting the multiple guide plates (12). The top of the drive frame (5) is located above the inclined rubber sheet (4), and the top of the air flow component (6) is located above the inclined rubber sheet (4). When the air supply pipe (2) supplies air, the inclined rubber sheet (4) is always in an aeration state. When the drive frame (5) rotates, it drives the air flow component (6) to move up and down. When the air flow component (6) moves up and down, it performs intermittent aeration.

2. The integrated aeration and biological purification device in front of the air shield dam according to claim 1, characterized in that: The aerator (3) includes an air guide pipe (31) fixedly connected to the air supply pipe (2) and an outer disk (32) fixedly connected to the outside of the air guide pipe (31). Multiple flow holes (311) are opened at equal angles on the air guide pipe (31).

3. The integrated aeration and biological purification device in front of the air shield dam according to claim 2, characterized in that: The drive frame (5) includes a rotating tube (51) rotatably connected inside the air duct (31), a disc (52) fixedly connected to the top of the rotating tube (51), an impeller assembly (53) fixedly connected to the bottom of the rotating tube (51), an arc block (54) fixedly connected to the top surface of the disc (52), and a brush strip assembly (55) snapped onto the outside of the disc (52). The top of the arc block (54) is arc-shaped, and the top of the brush strip assembly (55) gradually bends from the bottom to the top.

4. The integrated aeration and biological purification device in front of the air shield dam according to claim 3, characterized in that: The airflow component (6) includes a sliding tube (61) slidably connected inside the rotating tube (51), an air plate (62) fixedly connected to the top of the sliding tube (61), a semi-circular ring (63) fixedly connected to the bottom of the air plate (62), multiple side strips (64) equidistantly arranged and fixedly connected to the outside of the air plate (62), and multiple annular strips (65) arranged and connected to the side strips (64).

5. The integrated aeration and biological purification device in front of the air shield dam according to claim 4, characterized in that: The two ends of the semicircular ring (63) are set to be arc-shaped, and the diameter of the plurality of annular strips (65) gradually decreases as they approach the center of the slide tube (61). The annular strips (65) gradually tilt away from the center of the slide tube (61) from the middle to both sides.

6. The integrated aeration and biological purification device in front of the air shield dam according to claim 5, characterized in that: The bottom of the air guide tube (31) is provided with a shaft bracket (301), and a spring (302) is connected between the shaft bracket (301) and the slide tube (61). When the spring (302) is in an undeformed state, the top of the shaft bracket (301) is located inside the bottom of the slide tube (61).

7. The integrated aeration and biological purification device in front of the air shield dam according to claim 2, characterized in that: The diameter of the top end of the air guide tube (31) is smaller than the diameter of the outer disk (32), and multiple inclined plates (312) are connected at equal angles between the top end of the air guide tube (31) and the outer disk (32).

8. The integrated aeration and biological purification device in front of the air shield dam according to claim 7, characterized in that: The flow hole (311) is located above the outer disk (32), and the inclined rubber sheet (4) is installed in the area of ​​the inclined plate (312).

9. The integrated aeration and biological purification device in front of the air shield dam according to claim 4, characterized in that: The brush strip group (55) covers the area of ​​the inclined rubber sheet (4), and the annular strip (65) is located above the microporous rubber disc (7). The diameter of the multiple annular strips (65) is larger than the diameter of the microporous rubber disc (7) and smaller than the diameter of the inclined rubber sheet (4).

10. The integrated aeration and biological purification device in front of the air shield dam according to claim 2, characterized in that: The connecting plate (13) is provided with a plurality of square slots (131) at equal intervals. The guide plates (12) are connected to each other with a return flow baffle (121). The middle part of the return flow baffle (121) is recessed towards the end closer to the shield plate (8) and away from the airbag (10). There are two guide plates (12) between two adjacent return flow baffles (121). The number of square slots (131) and the return flow baffles (121) are equal and their positions correspond. The return flow baffles (121) block the water flow from being led out through the square slots (131).

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