Sewage treatment equipment and method

Abstract

The invention discloses sewage treatment equipment and method, and belongs to the technical field of sewage treatment.The sewage treatment equipment comprises a pool body, the pool body is a rectangular pool body and is provided with a cover body, a water inlet pipe is arranged on one side of the pool body, a water outlet pipe is arranged on the other side of the pool body, and an exhaust pipe is arranged on the cover body; a plurality of guide columns are vertically arranged, and each guide column is provided with a turntable capable of ascending, descending and rotating. Through the combination of rotation of the turntable and bidirectional aeration, in the rotating process of the turntable, the upper aeration holes and the lower aeration holes release oxygen synchronously, and meanwhile, the rotating turntable drives water flow to move, so that the laminar flow state of sewage is broken; the adjacent rotating discs rotate reversely, so that water flow forms multidirectional convection, diffusion of oxygen bubbles in sewage is accelerated, the situation that local dissolved oxygen is not uniform in the tank body is avoided, it is ensured that microorganisms keep high activity in a stable dissolved oxygen environment, and then the sewage treatment efficiency is improved.

Description

Wastewater treatment equipment and method Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to a wastewater treatment device and method. Background Technology

[0002] In the field of wastewater treatment, aeration is a crucial step in promoting the degradation of organic matter by microorganisms, and its effectiveness directly affects the overall quality of wastewater treatment. However, current mainstream aeration equipment still has many shortcomings in its structural design and functional implementation, making it difficult to meet the demands for high efficiency, convenience, and energy saving in wastewater treatment processes.

[0003] Existing aeration equipment mostly uses fixed aeration components, such as perforated pipes and membrane aerators. These components have a fixed aeration range and cannot be adjusted according to the flow of wastewater within the tank. This easily leads to significant differences in dissolved oxygen levels in different areas of the tank. Some areas become anoxic due to insufficient oxygen supply, while others experience excessive oxygen, resulting in waste. This, in turn, affects the stability of microbial activity and restricts wastewater treatment efficiency. Furthermore, after long-term operation, fixed aeration components easily accumulate sludge, impurities, and other pollutants beneath them. These pollutants not only clog aeration channels and reduce aeration efficiency but also require shutdown and disassembly for cleaning, increasing maintenance workload and interrupting the wastewater treatment process, thus affecting treatment progress.

[0004] In addition, although some equipment attempts to enhance water flow disturbance through simple stirring structures to improve aeration, the stirring direction is unidirectional, making it difficult to form multi-directional convection and preventing oxygen bubbles from spreading evenly to all corners of the tank. Furthermore, the coordination between the stirring structure and the aeration components is poor, failing to fully leverage their synergistic effect, resulting in limited improvement in dissolved oxygen efficiency. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a wastewater treatment device and method that features simultaneous release of oxygen from the upper and lower aeration holes during the rotation of the rotating disc, while the rotating disc drives water flow, breaking the laminar flow state of the wastewater; and the opposite rotation of adjacent discs creates multi-directional convection of the water flow, accelerating the diffusion of oxygen bubbles in the wastewater, avoiding uneven dissolved oxygen in the tank, and ensuring that microorganisms maintain high activity in a stable dissolved oxygen environment, thus solving the problems of the prior art.

[0006] This invention is implemented as follows: a sewage treatment device includes a rectangular pool with a cover. One side of the pool has an inlet pipe, and the other side has an outlet pipe. The cover has an air extraction pipe. Several vertically arranged guide columns are provided, each with a turntable capable of lifting, lowering, and rotating. The upper surface of the turntable has an inclined plate, and the turntable has a first inner cavity connected to an external air supply mechanism. The upper and lower surfaces of the turntable each have upper and lower aeration holes communicating with the first inner cavity. Gear rings are fixedly fitted onto the outer edges of the turntable, and several of these gear rings mesh with each other, with at least one gear ring meshing with a driving component.

[0007] As a preferred embodiment of the present invention, an upper limit rod and a lower limit rod that can adjust the height are fixedly connected to the inner wall of the pool. The lower limit rod is attached to the lower surface of the turntable, and the upper limit rod is attached to the upper surface of the turntable.

[0008] In a preferred embodiment of the present invention, the guide post is a stud, and an inner threaded cylinder is fixedly connected to the center of the turntable, wherein the inner threaded cylinder and the guide post are threadedly connected.

[0009] As a preferred embodiment of the present invention, the driving component includes: a fixed frame fixedly connected to the pool body, a motor fixedly fixed on the fixed frame, a rotating shaft fixedly connected to the output shaft of the motor, a gear fixedly connected to the lower end of the rotating shaft via a coupling, the lower end of the gear rotatably connected to the bottom wall of the pool body, and the gear meshing with one of the gear rings.

[0010] As a preferred embodiment of the present invention, the upper aeration holes are a plurality of holes, which are arranged in a ring at equal intervals on the upper surface of the turntable, and the upper end of the outermost upper aeration holes is inclined outward.

[0011] As a preferred embodiment of the present invention, the lower aeration holes are a plurality of those holes, which are evenly arranged on the lower surface of the turntable, and the lower ends of all the lower aeration holes are inclined outward.

[0012] As a preferred embodiment of the present invention, a support frame is fixedly connected to the lower surface of the turntable, and a brush is provided on the lower side of the support frame.

[0013] A wastewater treatment method using the aforementioned wastewater treatment equipment includes the following steps: S1: Wastewater introduction and aeration start-up: Wastewater is introduced into the tank through the inlet pipe. The air supply mechanism and motor are started, and oxygen is released through the aeration holes of the rotary disc. The motor drives the rotary disc to rotate synchronously in the opposite direction; S2: Dynamic operation of the rotary disc and enhanced dissolved oxygen: The rotary disc can be raised and lowered repeatedly. When it rises, the inclined blades drive the wastewater to dissolve oxygen a second time; the exhaust pipe recovers undissolved oxygen for recycling; S3: Impurity cleaning and tank bottom cleaning: The limit rod scrapes away impurities from the rotary disc. After a preset running time, the rotary disc descends and the tank bottom is cleaned with a brush. The impurities are discharged with the water flow; S4: Wastewater discharge and subsequent treatment: The treated wastewater is discharged and enters the sedimentation and filtration stage. The equipment is cleaned and maintained after shutdown.

[0014] As a preferred embodiment of the present invention, S2 linkage adjustment: when the sewage concentration is high, the frequency of the rotary table lifting and lowering is increased and the oxygen supply is increased; when the concentration is low, the opposite is true; S3 cooperative operation: when cleaning the bottom of the pool, the air extraction rate is accelerated to disturb the sewage, assisting in the discharge of impurities, and the normal rate is restored after cleaning.

[0015] Compared with existing technologies, the beneficial effects of this invention are as follows: 1. This equipment combines rotary disc rotation with bidirectional aeration. During the rotation of the disc, the upper and lower aeration holes release oxygen synchronously, while the rotating disc drives water flow, breaking the laminar flow state of the sewage. Furthermore, the opposite rotation of adjacent discs creates multidirectional convection, accelerating the diffusion of oxygen bubbles in the sewage and preventing uneven dissolved oxygen levels in the tank. This ensures that microorganisms maintain high activity in a stable dissolved oxygen environment, thereby improving sewage treatment efficiency. In addition, the continuously flowing sewage passes through each disc sequentially, ensuring uniform aeration throughout the entire tank flow path, further guaranteeing the stability of the treatment effect.

[0016] 2. The rotating disc's design, which allows it to rise and fall along the guide column, eliminates the need to disassemble the equipment when impurities accumulate below the disc. Simply raising the disc exposes the area of ​​accumulated impurities, enabling workers to directly clean them. This significantly simplifies the maintenance process and reduces the time and labor costs associated with maintenance. Simultaneously, it prevents aeration efficiency reduction caused by impurities clogging the aeration holes, ensuring long-term stable operation of the equipment and minimizing the impact of maintenance downtime on the wastewater treatment process.

[0017] 3. When the turntable rises to a specific position, the inclined blades on its upper surface can move the wastewater to the space above the water surface, allowing the wastewater to fully contact the abundant oxygen in that space, forming surface-contact dissolved oxygen. This works synergistically with underwater bidirectional aeration to create a dual oxygenation mechanism, significantly enhancing the dissolved oxygen effect. Simultaneously, the extraction pipe, in conjunction with the gas recovery system, enables oxygen recycling, reducing the emission of undissolved oxygen, improving oxygen resource utilization, and lowering oxygen consumption costs during equipment operation, thus meeting the development requirements of energy conservation and emission reduction.

[0018] 4. The rotary table's reciprocating lifting and rotation capabilities allow operators to flexibly adjust its height and rotation status based on changes in wastewater concentration. This, in turn, alters the aeration depth, aeration intensity, and the level of dissolved oxygen in the water, adapting to the treatment needs of wastewater with varying concentrations. Furthermore, the rectangular tank design, with wastewater flowing along its length, allows for direct integration into existing continuous wastewater treatment production lines without requiring large-scale modifications to the existing process. This lowers the barrier to entry for the equipment and enhances its compatibility with existing treatment systems. Attached Figure Description

[0019] Figure 1 is a three-dimensional structural diagram of the wastewater treatment equipment with an omitted cover provided in Embodiment 1 of the present invention; Figure 2 is an enlarged structural diagram of part A in Figure 1 provided in Embodiment 1 of the present invention; Figure 3 is a top view of the wastewater treatment equipment with an omitted cover provided in Embodiment 1 of the present invention; Figure 4 is a cross-sectional structural diagram of part BB in Figure 3 provided in Embodiment 1 of the present invention; Figure 5 is an enlarged structural diagram of part C in Figure 4 provided in Embodiment 1 of the present invention; Figure 6 is a structural diagram of the wastewater treatment equipment provided in Embodiment 1 of the present invention; Figure 7 is a top view of the wastewater treatment equipment with an omitted cover provided in Embodiment 2 of the present invention.

[0020] In the diagram: 1. Pool body; 2. Cover; 3. Inlet pipe; 4. Outlet pipe; 5. Air extraction pipe; 6. Guide column; 7. Turntable; 8. Inclined lever; 9. First inner cavity; 10. Upper aeration hole; 11. Lower aeration hole; 12. Gear ring; 13. Upper limit rod; 14. Lower limit rod; 15. Inner screw; 16. Fixing frame; 17. Motor; 18. Rotating shaft; 19. Gear bar; 20. Bearing frame; 21. Brush. Detailed Implementation

[0021] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0022] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0023] As shown in Figures 1 to 6, an embodiment of the present invention provides a wastewater treatment device, including a pool body 1, which is a rectangular pool body with a cover 2. A water inlet pipe 3 is provided on one side of the pool body 1, and a water outlet pipe 4 is provided on the other side. An air extraction pipe 5 is provided on the cover 2. Several vertically arranged guide columns 6 are fixedly connected to the bottom wall of the pool body 1. Each guide column 6 is provided with a turntable 7 that can be raised, lowered, and rotated. An inclined plate 8 is provided on the upper surface of the turntable 7. A first inner cavity 9 is provided inside the turntable 7. The first inner cavity 9 is connected to an external air supply mechanism (not shown in the figure). The upper and lower surfaces of the turntable 7 are respectively provided with upper aeration holes 10 and lower aeration holes 11 that are connected to the first inner cavity 9. A toothed ring 12 is fixedly sleeved on the outer edge of the turntable 7. Several toothed rings 12 mesh with each other, and at least one toothed ring 12 is meshed with a driving component.

[0024] In practical use, wastewater first enters the rectangular tank 1 through the inlet pipe 3 on one side of the tank 1. Guided by the structure of the tank 1, it flows smoothly along the length of the tank, passing through the various rotating discs 7 set inside the tank 1 in sequence, and finally being discharged through the outlet pipe 4 on the other side of the tank 1, forming a continuous wastewater treatment flow path. At the same time, the external air supply mechanism is connected to the first inner cavity 9 inside the rotating disc 7 through a hose, continuously injecting oxygen into the first inner cavity 9. After the oxygen is evenly distributed in the first inner cavity 9, it is simultaneously released into the wastewater through the upper aeration holes 10 on the upper surface and the lower aeration holes 11 on the lower surface of the rotating disc 7, forming bidirectional aeration covering the upper and lower areas of the rotating disc 7, providing basic oxygen supply for the wastewater and meeting the initial dissolved oxygen requirements for microbial degradation of organic matter.

[0025] Several turntables 7 are respectively mounted on vertically arranged guide columns 6, and toothed rings 12 fixedly mounted on the outer edges of each turntable 7 mesh with each other. When the drive unit is started, all turntables 7 are driven to rotate synchronously through the meshing transmission of the toothed rings 12. Due to the transmission characteristics of the meshing of the toothed rings 12, adjacent turntables 7 rotate in opposite directions. During the rotation of the turntables 7 rotating in opposite directions, on the one hand, they will drive the surrounding sewage to rotate, breaking the original laminar flow state of the sewage and forming local eddies, which will accelerate the diffusion of oxygen bubbles in the sewage; on the other hand, water flow will be counter-current between adjacent turntables 7 rotating in opposite directions, causing multi-directional convection of sewage, further aggravating the water flow disturbance, allowing oxygen bubbles to diffuse more quickly and evenly to all areas of the tank 1, avoiding the problem of uneven dissolved oxygen in some areas, and significantly improving the uniformity of aeration.

[0026] The turntable 7 can move up and down along the guide column 6. This function mainly serves two needs: impurity cleaning and dynamic operation adjustment. In terms of impurity cleaning, after the equipment has been running for a period of time, sludge, impurities and other pollutants will gradually accumulate under the turntable 7. At this time, the turntable 7 can be controlled to rise along the guide column 6, so that the lower surface of the turntable 7 is separated from the impurity accumulation layer, fully exposing the accumulation area. The staff can remove the impurities through the corresponding cleaning device or manual method without disassembling the equipment, which greatly reduces the difficulty of maintenance and reduces the interference with the sewage treatment process.

[0027] In terms of dynamic operation adjustment, the depth of the lower aeration holes 11 in the sewage can be flexibly changed by adjusting the lifting height of the turntable 7 to adapt to the dissolved oxygen requirements under different sewage concentrations. When the turntable 7 rises to almost detach from the water surface (or the upper surface is completely detached from the water surface), the lower aeration holes 11 remain in the sewage for continuous aeration, ensuring a basic dissolved oxygen supply. At the same time, the inclined plates 8 on the upper surface of the turntable 7 rotate with the turntable 7, generating a directional pushing effect on the sewage on the water surface, lifting the sewage upwards and allowing it to enter the space between the tank body 1, the cover 2, and the water surface. This space contains a large amount of oxygen, and the lifted sewage can fully contact the oxygen, achieving a dual dissolved oxygen effect of "underwater aeration and surface contact dissolved oxygen". In addition, during equipment operation, the turntable 7 can be reciprocated, dynamically switching the aeration depth and the intensity of surface dissolved oxygen according to actual treatment needs, further optimizing the treatment effect.

[0028] The exhaust pipe 5 installed on the tank body 1 is connected to an external gas recovery system (not shown in the figure). During equipment operation, the exhaust pipe 5 extracts free oxygen (including oxygen in the space above the water surface and oxygen escaping from the sewage) that has not been fully dissolved by the sewage inside the tank body 1 and transports it to the gas recovery system. After being processed, this recovered oxygen is transported back to the external gas supply mechanism, which then injects it into the first inner cavity 9 of the turntable 7 through a hose, realizing the recycling of oxygen, effectively reducing the waste of oxygen resources and lowering the energy consumption of equipment operation.

[0029] Specifically, the guide post 6 is a stud, and an inner threaded cylinder 15 is fixedly connected to the center of the turntable 7. The inner threaded cylinder 15 and the guide post 6 are threaded together. The guide post 6 is designed as a stud with threads on its outer surface. The inner wall of the inner threaded cylinder 15 fixed at the center of the turntable 7 is provided with internal threads that match the stud, and the inner threaded cylinder 15 and the stud form a threaded pair connection. When an external driving force drives the turntable 7 to rotate, since the stud is fixed, the inner threaded cylinder 15 will move up and down along the axial direction of the stud under the action of thread engagement, thereby driving the entire turntable 7 to move up and down synchronously while rotating. There is no need to add an additional independent lifting drive mechanism. The rotational motion is directly converted into axial lifting motion through thread transmission.

[0030] This design simplifies the equipment drive structure, eliminating the separate rotary drive and lifting drive systems found in traditional equipment. This reduces the number of parts, lowers manufacturing costs, and reduces the probability of failure. Meanwhile, the threaded drive features high transmission precision, and the rotation and lifting of the turntable 7 are highly synchronized, allowing for precise control of the aeration depth to dynamically adjust during rotation, further optimizing the dissolved oxygen effect.

[0031] Specifically, the guide post 6 is machined into a high-precision trapezoidal stud (or ball stud) to ensure uniform thread profile and pitch; a mounting hole is opened in the center of the turntable 7, and the inner screw cylinder 15 is fixed in the mounting hole by welding or bolts to ensure the coaxiality of the inner screw cylinder 15 and the turntable 7; the lower end of the stud is fixed to the bracket at the bottom of the pool body 1 by bearings to ensure that the stud is vertical and fixed; when the drive device drives the turntable 7 to rotate, the inner screw cylinder 15 moves along the thread trajectory of the stud, so that the rotation and lifting of the turntable 7 can be synchronized.

[0032] Specifically, the driving component includes: a fixed frame 16 fixedly connected to the pool body 1, a motor 17 fixedly fixed on the fixed frame 16, a rotating shaft 18 fixedly connected to the output shaft of the motor 17, a gear 19 fixedly connected to the lower end of the rotating shaft 18 through a coupling, the lower end of the gear 19 being rotatably connected to the bottom wall of the pool body 1, and the gear 19 meshing with one of the gear rings 12.

[0033] The fixed frame 16 on the pool body 1 provides stable support for the motor 17. The output shaft of the motor 17 is fixedly connected to the rotating shaft 18. The lower end of the rotating shaft 18 is connected to the rack 19 through a coupling. The lower end of the rack 19 is rotatably connected to the bottom wall of the pool body 1 through a bearing, ensuring that the rack 19 is vertical and stable. The rack 19 meshes with the gear ring 12 of one of the turntables 7. Since the rack 19 runs through the pool body 1 vertically and is fixed in a fixed position, the gear ring 12 always remains meshed with the rack 19, no matter what height the turntable 7 is raised or lowered along the guide column 6. After the motor 17 starts, it drives the rack 19 to rotate through the rotating shaft 18. The rack 19 drives the gear ring 12 connected to it to rotate through meshing transmission. Then, through the mutual meshing of each gear ring 12, all the turntables 7 are driven to rotate synchronously.

[0034] The above-mentioned design solves the problem of transmission failure during the lifting and lowering of the turntable 7. Traditional gear transmission is prone to tooth disengagement due to the lifting and lowering of the turntable 7. However, this structure ensures that the turntable 7 can stably obtain rotational power throughout its entire lifting and lowering range by meshing the fixed-position rack 19 with the liftable gear ring 12, thus ensuring the continuous operation of the equipment. At the same time, the rack 19 transmission is a rigid transmission with high transmission efficiency and large torque, which can drive multiple sets of turntables 7 to rotate synchronously, avoiding water flow turbulence caused by inconsistent rotation speeds of the turntables 7 and improving aeration uniformity.

[0035] Specific implementation method: A portal frame 16 is welded or bolted to the top of the pool body 1. A motor 17 (a servo motor 17 with a reduction mechanism is selected to ensure controllable speed) is installed at the center of the crossbeam of the frame 16. The output shaft of the motor 17 is fixedly connected to the rotating shaft 18 through a coupling. The lower end of the rack 19 is connected to the support of the bottom wall of the pool body 1 through a thrust bearing to ensure that the rack 19 can rotate freely and its axial position is fixed. A matching rack 19 (tooth pitch and module are consistent with the rack 12) is machined according to the size of the rack 12 so that the rack 19 is fully engaged with the rack 12 of one of the turntables 7. After the motor 17 is powered on, it can drive all the turntables 7 to rotate through the rack 19.

[0036] Furthermore, the upper aeration holes 10 are a plurality of those arranged in a ring at equal intervals on the upper surface of the turntable 7, and the upper end of the outermost upper aeration holes 10 is inclined outward.

[0037] The upper aeration holes 10 are distributed in a ring at equal intervals on the upper surface of the turntable 7, ensuring that oxygen is released evenly from the upper surface of the turntable 7 and avoiding local concentration or lack of aeration. At the same time, the upper end of the outermost upper aeration holes 10 is inclined outward (that is, the axis of the aeration hole forms a certain angle with the upper surface of the turntable 7, and the opening faces the outside of the turntable 7). When oxygen is sprayed out from the inclined aeration holes, it will form an outward diffusion airflow trajectory. Compared with the vertically upward aeration holes, the inclined aeration holes can push oxygen bubbles to a more distant area outside the turntable 7, expand the coverage of the upper surface aeration, and allow the oxygen bubbles to mix more fully with the surrounding water flow. This design further enhances aeration uniformity. The equidistant ring distribution ensures no dead zones in aeration on the upper surface of the rotating disc 7, while the outward-sloping design of the outer aeration holes breaks through the limitations of traditional vertical aeration, expanding the diffusion radius of oxygen above the water surface and in the upper wastewater. It also reduces the aeration blank area between adjacent rotating discs 7, allowing the upper wastewater in the tank 1 to come into more full contact with oxygen, enhancing the aeration effect of dissolved oxygen above the water and the upper wastewater, while avoiding resource waste caused by the concentrated accumulation of oxygen bubbles directly above the rotating disc 7.

[0038] Specifically, on the upper surface of the turntable 7, multiple concentric rings of aeration holes are machined with the center of the turntable 7 as the center. The number of aeration holes on each ring is evenly distributed (e.g., 8-12 per ring), and the aeration holes of adjacent rings are staggered. For the outermost ring of aeration holes, the angle between its axis and the upper surface of the turntable 7 is set to 30°-60° (adjusted according to the width of the tank 1 to ensure that the outer aeration areas of adjacent turntables 7 can be connected), and the opening direction is towards the outside of the turntable 7. The diameter of the aeration holes is set according to the air supply flow rate to ensure that oxygen can be sprayed out at a stable flow rate.

[0039] Furthermore, the lower aeration holes 11 are of several kinds and are evenly arranged on the lower surface of the turntable 7, and the lower ends of all the lower aeration holes 11 are inclined outward.

[0040] The lower aeration holes 11 are evenly distributed on the lower surface of the rotating disk 7 (such as in a matrix or radial pattern) to ensure that oxygen is released from the lower surface of the rotating disk 7 in all directions, covering the sewage area below the rotating disk 7. The lower ends of all the lower aeration holes 11 are inclined outward (the axis of the aeration hole forms a certain angle with the lower surface of the rotating disk 7, and the opening faces the lower outer side of the rotating disk 7). When oxygen is sprayed out from the inclined lower aeration holes 11, it will form an airflow that diffuses to the lower outer side of the rotating disk 7. On the one hand, this pushes the sewage below to form an outward circulation, accelerating the diffusion of oxygen bubbles in the lower sewage layer. On the other hand, it prevents oxygen bubbles from directly impacting the lower surface of the rotating disk 7, reducing the impact force of the bubbles on the rotating disk 7, and at the same time expanding the coverage of the lower aeration layer, covering the sewage area below and around the rotating disk 7. This design solves the problem of limited aeration range below the rotary disc 7. The uniform distribution and outward tilting design of the lower aeration holes 11 allow oxygen to cover a larger area of ​​wastewater below the rotary disc 7, preventing oxygen-deficient areas from appearing in the lower layer of wastewater. At the same time, the outward-tilted airflow can drive the flow of the lower layer of wastewater, reducing the accumulation of sludge at the bottom of the tank 1, reducing the difficulty of cleaning impurities at the bottom of the tank, and the airflow direction is away from the rotary disc 7, avoiding the vibration of the rotary disc 7 caused by bubble impact, thus improving the stability of equipment operation.

[0041] In practice, CNC drilling is used on the lower surface of the turntable 7 to process a matrix of lower aeration holes 11 (the hole spacing is set according to the diameter of the turntable 7 to ensure full coverage without dead angles); when processing all the lower aeration holes 11, the angle between their axis and the lower surface of the turntable 7 is set to 20°-45°, and the opening direction is towards the outside of the turntable 7 (the angle of the turntable 7 can be fixed by tooling fixtures to ensure that the tilt direction of all the lower aeration holes 11 is consistent); the inner wall of the aeration holes is smoothed to reduce airflow resistance and ensure that oxygen can be sprayed out smoothly.

[0042] Furthermore, a support frame 20 is fixedly connected to the lower surface of the turntable 7, and a brush 21 is provided on the lower side of the support frame 20.

[0043] A ring-shaped (or radial) support frame 20 is fixed to the lower surface of the turntable 7 by bolts or welding. A flexible brush 21 (such as a nylon brush 21) is fixed to the lower side of the support frame 20 by clips or adhesive. When the turntable 7 descends to the bottom along the guide column 6, the brush 21 will adhere to the bottom wall of the tank body 1. At this time, the turntable 7 rotates around the guide column 6, causing the support frame 20 and the brush 21 to rotate synchronously. The brush 21 generates relative friction with the bottom wall of the tank body 1. Utilizing the toughness and friction of the brush bristles, the sludge and impurities accumulated at the bottom of the tank are swept up. The swept-up impurities flow with the water flow and can be separated and removed through subsequent sewage treatment processes (such as sedimentation tanks), avoiding the long-term accumulation and hardening of impurities at the bottom of the tank. This setup enables "active cleaning" of impurities on the bottom wall of pool 1. Without the need for manual entry into the pool or the use of specialized cleaning equipment, the bottom of the pool can be automatically cleaned by rotating the turntable 7 and driving the brush 21. This reduces the labor intensity and safety risks associated with pool bottom maintenance. At the same time, it avoids problems such as reduced effective volume of pool 1 and increased water flow resistance caused by the accumulation of impurities at the bottom of the pool, ensuring long-term stable operation of the equipment and reducing downtime caused by pool bottom cleaning.

[0044] In specific implementation: Installation of the support frame 20: Based on the diameter of the turntable 7, fabricate a ring-shaped stainless steel support frame 20 (or 3-4 radial stainless steel rods), and fix the support frame 20 to the lower surface of the turntable 7 with bolts (ensuring the support frame 20 is coaxial with the turntable 7); Installation of the brush 21: A slot is opened on the lower side of the support frame 20, and a prefabricated strip-shaped nylon brush 21 (brush bristle length is set according to the distance between the bottom wall of the pool 1 and the lowest position of the turntable 7, ensuring the brush bristles can fit against the pool bottom when the turntable 7 is lowered to the lowest point) is embedded into the slot, and the brush 21 is fixed with a buckle; Cleaning control: Set the lifting stroke of the turntable 7. When it is necessary to clean the bottom of the pool, control the turntable 7 to lower to the lowest point, start the rotation of the turntable 7, and the brush 21 will rotate with the turntable 7 to clean the bottom of the pool. After cleaning, control the turntable 7 to rise back to the normal operating height.

[0045] This application also provides a wastewater treatment method using the aforementioned wastewater treatment equipment, comprising the following steps: S1: Wastewater introduction and aeration start-up. Wastewater is introduced into the tank 1 through the inlet pipe 3. The air supply mechanism and motor 17 are started, and oxygen is released through the aeration holes of the turntable 7 for aeration. The motor 17 drives the turntable 7 to rotate synchronously in the opposite direction; S2: Dynamic operation and enhanced dissolved oxygen of the turntable 7. The turntable 7 can be raised and lowered repeatedly. When it rises, the inclined plate 8 drives the wastewater to dissolve oxygen a second time; the exhaust pipe 5 recovers undissolved oxygen for recycling; S3: Impurity cleaning and tank bottom cleaning. The limit rod scrapes away impurities from the turntable 7. After a preset running time, the turntable 7 descends and the bottom of the tank is cleaned with the brush 21. The impurities are discharged with the water flow; S4: Wastewater discharge and subsequent treatment. After treatment, the wastewater is discharged and enters the sedimentation and filtration stage. The equipment is cleaned and maintained after shutdown.

[0046] Furthermore, S2 linkage adjustment: when the wastewater concentration is high, the lifting frequency of rotary table 7 is increased, and the oxygen supply is increased; when the concentration is low, the opposite is true. S3 cooperative operation: when cleaning the bottom of the pool, the air extraction rate is accelerated to disturb the wastewater and assist in the discharge of impurities; after cleaning, the normal rate is restored.

[0047] Unlike Embodiment 1, referring to Figure 7, the inner wall of the pool body 1 is fixedly connected with an upper limit rod 13 and a lower limit rod 14 that can adjust the height. The lower limit rod 14 is attached to the lower surface of the turntable 7, and the upper limit rod 13 is attached to the upper surface of the turntable 7.

[0048] For example, the upper limit rod 13 and the lower limit rod 14 can be fixedly connected to the inner wall of the pool body 1 using screws. The height of both rods can be adjusted by removing the screws, thereby driving the turntable 7 to rise and fall. Alternatively, a telescopic mechanism can be used to drive the upper limit rod 13 and the lower limit rod 14 to rise and fall, stopping them at the desired position. Specifically, the upper limit rod 13 and the lower limit rod 14 are fixed to the inner wall of the pool body 1, and their height is adjustable. They respectively conform to the upper and lower surfaces of the turntable 7, forming a bidirectional limit on the turntable 7. In terms of height adjustment, the installation position of the limit rod on the pool wall can be changed by removing the fixing screws, or the limit rod can be driven to rise and fall by means of a telescopic mechanism (such as an electric push rod or a hydraulic rod). The limit rod will drive the mating turntable 7 to rise and fall synchronously, thereby precisely controlling the running height of the turntable 7. In terms of impurity cleaning, when the turntable 7 rotates around the guide column 6, the limit rod mating with its upper and lower surfaces will slide relative to the surface of the turntable 7. By using the contact friction between the limit rod and the turntable 7, the sludge and impurities attached to the surface of the turntable 7 are scraped off, preventing impurities from accumulating and clogging the aeration holes.

[0049] This design addresses two key aspects. First, it solves the problem of low control precision in raising and lowering the turntable 7. The rigid limit rod ensures that the turntable 7 is stably fixed at the target height, preventing it from shifting due to water flow impact and guaranteeing the stability of aeration depth and dissolved oxygenation. Second, when raising and lowering is achieved through the telescopic mechanism, the turntable 7 can be cleaned while running. This eliminates the need for additional shutdowns or cleaning devices, allowing for the simultaneous removal of impurities from the turntable 7 surface. This reduces the risk of aeration hole blockage, lowers equipment maintenance frequency and costs, and prevents impurities from spreading with the water flow and affecting wastewater treatment efficiency.

[0050] Specifically, the screw-fixed adjustment type: A vertically arranged mounting strip is set on the inner wall of the pool body 1. Multiple sets of mounting holes are pre-set on the mounting strip. The upper limit rod 13 and the lower limit rod 14 are fixed in the corresponding mounting holes with bolts. The bolts are removed as needed, and the limit rods are moved to the target mounting holes and re-fixed, which can drive the turntable 7 to adjust to the corresponding height. The telescopic mechanism driven type: Electric telescopic push rods (or hydraulic telescopic cylinders) are installed at the top and bottom of the pool body 1 respectively. The output end of the telescopic push rod is fixedly connected to the upper limit rod 13 and the lower limit rod 14. The telescopic push rod is set with a controller to extend or retract. The push rod drives the limit rod to rise or fall. When the limit rod is in contact with the turntable 7 and reaches the target height, the telescopic push rod locks in position, realizing precise control of the height of the turntable 7.

[0051] 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.

[0052] 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 wastewater treatment device, characterized in that, include: The pool body (1) is a rectangular pool body with a cover (2). One side of the pool body (1) is provided with an inlet pipe (3) and the other side is provided with an outlet pipe (4). The cover (2) is provided with an air extraction pipe (5). Several vertically arranged guide columns (6) are provided with a turntable (7) that can be raised, lowered and rotated. The upper surface of the turntable (7) is provided with a slanted paddle (8). The turntable (7) is provided with a first inner cavity (9). The first inner cavity (9) is connected to an external air supply mechanism. The upper and lower surfaces of the turntable (7) are respectively provided with an upper aeration hole (10) and a lower aeration hole (11) that are connected to the first inner cavity (9). The outer edge of the turntable (7) is fixedly fitted with a toothed ring (12). Several toothed rings (12) mesh with each other, and at least one toothed ring (12) is meshed with a driving component.

2. The wastewater treatment equipment as described in claim 1, characterized in that: The inner wall of the pool body (1) is fixedly connected with an upper limit rod (13) and a lower limit rod (14) that can adjust the height. The lower limit rod (14) is attached to the lower surface of the turntable (7), and the upper limit rod (13) is attached to the upper surface of the turntable (7).

3. The wastewater treatment equipment as described in claim 1, characterized in that: The guide post (6) is a stud, and an inner screw cylinder (15) is fixedly connected to the center of the turntable (7). The inner screw cylinder (15) and the guide post (6) are threadedly connected.

4. A wastewater treatment device as described in claim 2 or 3, characterized in that: The driving component includes: a fixed frame (16) fixedly connected to the pool body (1), a motor (17) fixedly connected to the fixed frame (16), a rotating shaft (18) fixedly connected to the output shaft of the motor (17), a gear (19) fixedly connected to the lower end of the rotating shaft (18) through a coupling, the lower end of the gear (19) being rotatably connected to the bottom wall of the pool body (1), and the gear (19) meshing with one of the gear rings (12).

5. The wastewater treatment equipment as described in claim 1, characterized in that: The upper aeration holes (10) are a plurality of those arranged in a ring at equal intervals on the upper surface of the turntable (7), and the upper end of the outermost upper aeration holes (10) is inclined outward.

6. The wastewater treatment equipment as described in claim 1, characterized in that: The lower aeration holes (11) are numerous and are evenly arranged on the lower surface of the turntable (7), and the lower ends of all the lower aeration holes (11) are inclined outward.

7. The wastewater treatment equipment as described in claim 1, characterized in that: The lower surface of the turntable (7) is fixedly connected to a support frame (20), and a brush (21) is provided on the lower side of the support frame (20).

8. A wastewater treatment method, using the wastewater treatment equipment according to any one of claims 1-7, Includes the following steps: S1: Wastewater introduction and aeration start-up Wastewater is introduced into the tank (1) through the inlet pipe (3), and the air supply mechanism and motor (17) are started. Oxygen is released through the aeration holes of the turntable (7) and the motor (17) drives the turntable (7) to rotate synchronously in the opposite direction; S2: Dynamic operation of the turntable (7) and enhanced dissolved oxygen The turntable (7) can be raised and lowered repeatedly. When it rises, the inclined plate (8) drives the wastewater to dissolve oxygen a second time; the exhaust pipe (5) recovers undissolved oxygen for recycling; S3: Impurity cleaning and tank bottom cleaning The limit rod scrapes the impurities of the turntable (7). After the preset running time, the turntable (7) descends and the bottom of the tank is cleaned with a brush (21). The impurities are discharged with the water flow; S4: Wastewater discharge and subsequent treatment. After treatment, the wastewater is discharged and enters the sedimentation and filtration stage. The equipment is cleaned and maintained after shutdown.

9. A wastewater treatment method as described in claim 8, characterized in that: S2 Linkage Adjustment: When the sewage concentration is high, increase the lifting frequency of the turntable (7) and increase the oxygen supply; when the concentration is low, the opposite is true; S3 Cooperative Operation: When cleaning the bottom of the pool, speed up the air pumping rate to disturb the sewage and assist in the discharge of impurities. After cleaning, restore the normal rate.

Images