A multi-layer air diffuser for increasing dissolved oxygen in an aeration tank

Abstract

The present invention discloses a multi-layer air diffuser for increasing dissolved oxygen in an aeration tank in the field of sewage treatment technology. The diffuser aims to address the problems of low oxygen transfer efficiency, easy clogging of air jets, and high maintenance costs in traditional air diffusers. The diffuser in this solution is composed of a diffusion disk with a multi-layer rotating array of air jets. Through a stepped structural design, the bubbles are evenly distributed and penetrate deeply, improving the oxygen transfer efficiency. The built-in check mechanism effectively prevents solution backflow while promoting the generation of small bubbles. The equipped cleaning mechanism can automatically clear blockages on the air jets, reducing the need for manual maintenance. The present invention solves the problems of bubble merging and reduced contact area in traditional single-layer or simple multi-layer structure air diffusers. The cleaning mechanism can regularly clean the air jets to prevent clogging by sludge and microorganisms, ensuring the long-term stable operation of the air diffuser and reducing the problems of poor airflow and reduced aeration effect caused by air jet blockage.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a multi-layer air diffuser for increasing dissolved oxygen in an aeration tank. Background Art

[0002] In the fields of wastewater treatment and water oxygenation, traditional aeration technologies often face challenges with low dissolved oxygen transfer efficiency and high energy consumption. In particular, poorly designed air diffusers in aeration tanks often lead to bubble merging and uneven dissolved oxygen distribution, which in turn impacts wastewater treatment effectiveness and microbial activity. Furthermore, air diffusers are prone to clogging over long periods of operation, requiring frequent manual cleaning and maintenance. This not only increases operating costs but also impacts equipment stability and reliability. Clogging also causes a decrease in dissolved oxygen concentration in the aeration tank, compromising aeration effectiveness.

[0003] Existing air diffusers typically utilize a single-layer or simple multi-layer structure. While this can increase bubble generation to a certain extent, the bubbles tend to merge during their ascent, increasing their size and reducing their contact area with the water, thereby reducing oxygen transfer efficiency. Furthermore, over long periods of use, the air holes in traditional air diffusers are prone to clogging with sludge and microorganisms, resulting in poor airflow and further reducing aeration effectiveness. Frequent manual cleaning and maintenance are often required to maintain proper operation of the equipment, which not only increases operating costs but can also cause equipment downtime, impacting the continuity and stability of wastewater treatment.

[0004] In order to solve these problems, the present technical solution proposes a multi-layer air diffuser for increasing the dissolved oxygen in the aeration tank. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems raised in the above background technology. The present invention provides a multi-layer air diffuser for increasing the dissolved oxygen in an aeration tank.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] A multi-layer air diffuser for increasing dissolved oxygen in an aeration tank comprises a base, a multi-layer diffuser, an air supply mechanism, a check mechanism and a cleaning mechanism, wherein:

[0008] The base is arranged in the aeration tank;

[0009] The multi-layer diffuser is arranged on the top of the base. The multi-layer diffuser is stepped and has an air cavity inside. The multi-layer diffuser is composed of a plurality of diffuser plates distributed up and down. The diameters of the diffuser plates increase from top to bottom. The top of each diffuser plate is configured with a plurality of air jet holes distributed in a rotating array. The air jet holes are connected to the air cavity. The air jet holes on the same diffuser plate surround the outside of the previous diffuser plate.

[0010] The air supply mechanism is used to supply air into the interior of the air cavity;

[0011] There are multiple check mechanisms, each of which is installed on the air jet hole and is used to control the gas in the air cavity to be ejected from the air jet hole and prevent the solution in the aeration tank from flowing into the air cavity;

[0012] The cleaning mechanism is arranged on the top of the multi-layer diffuser, and is used to clean the multi-layer diffuser to prevent the air injection holes from being blocked.

[0013] Furthermore, the base has a hollow cavity inside, and the air supply mechanism includes a blower arranged outside the aeration tank. The air outlet end of the blower is connected to an air outlet pipe, and one end of the air outlet pipe passes through the interior of the hollow cavity and is connected to the air cavity.

[0014] Furthermore, the check mechanism includes an air jet tube inserted inside the air jet hole, the bottom end of the air jet tube passes through the interior of the air cavity and is connected to the same mounting tube, the diameter of the mounting tube is larger than the diameter of the air jet tube, a mounting ring is fixed on the inner wall of the bottom end of the mounting tube, a second-stage block is movably provided inside the mounting tube, the diameter of the bottom end of the second-stage block is smaller than the diameter of the top end, the diameter of the bottom end of the second-stage block is the same as the inner diameter of the mounting ring and is movably inserted inside the mounting ring, and a spring is connected between the top of the second-stage block and the inner wall of the mounting tube.

[0015] Furthermore, the inner wall of the jet pipe is conical and the top diameter is larger than the bottom diameter. A vertical mounting rod is fixed to the top of the second-stage block, and a conical block corresponding to the inner wall of the jet pipe is fixed to the top of the mounting rod. The height of the conical block is much smaller than the height of the jet pipe, and a cross baffle is fixed on the inner wall of the top end of the jet pipe.

[0016] Furthermore, the cleaning mechanism includes a rotating rod vertically rotatably installed on the central axis of the multi-layer diffuser, and the two ends of the rotating rod are movable through the top and bottom ends of the multi-layer diffuser respectively. A connecting frame is fixed on the top of the rotating rod, and a plurality of cleaning components are installed on the connecting frame. The plurality of cleaning components correspond one-to-one to the tops of the plurality of diffusion plates respectively. The cleaning mechanism also includes a connecting piece connected between the air outlet pipe and the rotating rod, and the connecting piece can drive the rotating rod to rotate through the flow of gas inside the air outlet pipe.

[0017] Furthermore, the cleaning assembly is composed of a plurality of scraping members distributed in a rotating array. The plurality of scraping members in the same cleaning assembly correspond to each other, and the scraping member includes a device rod vertically fixed to the bottom of the connecting frame. The bottom end of the device rod is fixed with a scraper that fits the top side of the diffuser disk, and the extension line of the scraper length does not intersect with the central axis of the multi-layer diffuser.

[0018] Furthermore, a movable rod is movably provided at the bottom of the device rod, the scraper is fixed at the bottom end of the movable rod, the top end of the movable rod is movably inserted into the bottom end of the device rod, and connecting plates are fixed to the outer sides of the device rod and the movable rod, and a spring 2 is connected between the two connecting plates, and the bottom side of the scraper is always in contact with the top side of the diffusion plate.

[0019] Furthermore, the linkage includes a wheel box arranged in the middle of the air outlet pipe and located inside the hollow cavity, a wind wheel is rotatably installed inside the wheel box, the rotating shaft of the wind wheel is vertically arranged and the top end of the wind wheel rotating shaft is fixed with a connecting shaft that movably passes through the wheel box, the top end of the connecting shaft is rotatably installed on the bottom side of the multi-layer diffuser, a main gear is fixed on the connecting shaft, and a sub-gear meshing with the main gear is fixed on the bottom end of the rotating rod, and the diameter of the sub-gear is much larger than the diameter of the main gear.

[0020] Furthermore, a vertical support rod is fixed to the bottom of the connecting frame, and the bottom end of the support rod is connected to a ball rolling on the top side of the base.

[0021] Furthermore, an annular connecting ring is fixedly connected between several corresponding device rods, and the diameters of the several connecting rings decrease from bottom to top. Several evenly distributed cutting blades are fixed on the inner and outer sides of the connecting rings.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This solution uses a multi-layer structure and a rotating array of air jet holes to produce more and smaller bubbles, increasing the contact area between the bubbles and the water body, thereby improving the oxygen transfer efficiency and solving the problem of bubble merging and reduced contact area in traditional single-layer or simple multi-layer structure air diffusers.

[0024] The cleaning mechanism of the present invention can regularly clean the air jet holes to prevent clogging by sludge and microorganisms, thereby ensuring long-term stable operation of the air diffuser and reducing the problems of poor airflow and reduced aeration effect caused by clogging of the air jet holes.

[0025] The self-cleaning function of the present invention reduces the need for manual cleaning, reduces maintenance costs and workload, improves the operating efficiency of the equipment, and solves the problem that traditional equipment requires frequent manual cleaning and maintenance. Since the time of equipment downtime for maintenance is reduced, the continuity and stability of the sewage treatment process are enhanced, and the problem of equipment downtime due to maintenance of traditional equipment is solved.

[0026] The design of the check mechanism in the present invention prevents the solution from flowing back, reduces the risk of equipment failure, and improves the safety of the entire sewage treatment system.

[0027] By improving oxygen transfer efficiency and reducing energy consumption, the present invention has less impact on the environment, meets environmental protection requirements, and helps to achieve a more sustainable sewage treatment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 A three-dimensional cross-sectional view of

[0030] Figure 3 For the present invention Figure 2 A magnified view of the structure in center A;

[0031] Figure 4 For the present invention Figure 2 Magnified view of the structure in middle B;

[0032] Figure 5 For the present invention Figure 1 A three-dimensional cross-sectional view from another direction;

[0033] Figure 6 For the present invention Figure 1 Schematic diagram of the three-dimensional structure of the middle part;

[0034] Figure 7 For the present invention Figure 6 Schematic diagram of the three-dimensional structure of the middle part;

[0035] Figure 8 For the present invention Figure 7 Schematic diagram of the three-dimensional structure of the middle part;

[0036] Figure 9 For the present invention Figure 8 Exploded view of;

[0037] Figure 10 For the present invention Figure 7 A schematic diagram of the three-dimensional structure of another part of the structure;

[0038] Figure 11 An exploded view of the return stop mechanism of the present invention;

[0039] Figure 12 It is a schematic diagram of the three-dimensional structure of the scraping member in the present invention.

[0040] Figure: 1, base; 11, hollow cavity; 2, multi-layer diffuser; 21, diffuser disc; 22, air jet hole; 201, air cavity; 3, air supply mechanism; 31, blower; 32, air outlet pipe; 321, exhaust pipe; 322, filter; 4, check mechanism; 41, air jet pipe; 411, cross baffle; 42, mounting pipe; 43, mounting ring; 44, second-stage block; 441, mounting rod; 442, tapered block; 45, spring 1; 5. Cleaning mechanism; 51. Rotating rod; 52. Connecting frame; 521. Support rod; 522. Ball; 53. Cleaning assembly; 531. Device rod; 532. Scraper; 533. Movable rod; 534. Connecting plate; 535. Spring 2; 536. Connecting ring; 537. Cutting blade; 54. Linking part; 541. Wheel box; 542. Wind wheel; 543. Connecting shaft; 544. Main gear; 545. Sub-gear. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0042] The present embodiment provides a multi-layer air diffuser for increasing the dissolved oxygen in the aeration tank, which is mainly used to solve the problem that the existing air diffusers usually adopt a single-layer or simple multi-layer structure. Although it can increase the generation of bubbles to a certain extent, the bubbles are easily merged during the rising process, resulting in an increase in the size of the bubbles, reducing the contact area between the bubbles and the water body, thereby reducing the oxygen transfer efficiency. In addition, during the long-term use of traditional air diffusers, the air jet holes are easily blocked by sludge and microorganisms, resulting in poor air flow, further reducing the aeration effect. In order to maintain the normal operation of the equipment, frequent manual cleaning and maintenance are usually required, which not only increases operating costs, but may also cause equipment shutdown, affecting the continuity and stability of sewage treatment. The following technical solutions are provided, which will be combined below. Figures 1-12 Give detailed instructions:

[0043] Example 1: In this example, an innovative multi-layer air diffuser is designed and installed in an aeration tank to increase the dissolved oxygen level and solve the problems of low efficiency and nozzle clogging encountered by traditional air diffusers in the sewage treatment process. The device includes a base 1, a multi-layer diffuser 2, an air supply mechanism 3, a check mechanism 4, and a cleaning mechanism 5, wherein:

[0044] The base 1 is set in the aeration tank to provide a stable foundation for the entire system;

[0045] The multi-layer diffuser 2 is arranged on the top of the base 1. The multi-layer diffuser 2 is stepped and has an air cavity 201 inside. Its unique stepped design enables the air cavity 201 to be formed in the multi-layer structure. Such a structure is conducive to the uniform distribution and rise of bubbles. The multi-layer diffuser 2 is composed of a plurality of diffusion disks 21 distributed up and down. The diameters of the plurality of diffusion disks 21 increase from top to bottom. The top of each diffusion disk 21 is configured with a plurality of air jet holes 22 distributed in a rotating array. The air jet holes 22 are connected to the air cavity 201. The plurality of air jet holes 22 on the same diffusion disk 21 surround the outside of the previous diffusion disk 21. The layout of the air jet holes 22 makes bubble generation more uniform, thereby improving the oxygen transfer efficiency.

[0046] Specifically, the outer peripheral side surface of the diffusion disc 21 is inclined. This design helps dirt and sediment slide off and avoid accumulation. In addition, the diffusion disc 21 is sprayed with an anti-stick coating. This coating can reduce the adhesion of sludge and microorganisms to the surface of the diffusion disc 21, reducing the risk of clogging of the air jet holes 22 due to biofilm accumulation. The use of the anti-stick coating not only helps to keep the air jet holes 22 unobstructed, but also reduces the maintenance workload of the cleaning mechanism 5, thereby improving the operating efficiency of the equipment. More importantly, the diffusion disc 21 is made of corrosion-resistant material. This material selection is to cope with the corrosive environment that may exist in the aeration tank. The use of corrosion-resistant material not only extends the service life of the diffusion disc 21, but also reduces equipment failures caused by corrosion, thereby improving the reliability and stability of the entire multi-layer air diffuser. It should be noted that the anti-stick coating is a polytetrafluoroethylene coating and the corrosion-resistant material is stainless steel.

[0047] The air supply mechanism 3 is used to supply air to the interior of the air cavity 201 to ensure that the air injection hole 22 can continuously generate bubbles;

[0048] There are multiple check mechanisms 4, each of which is installed on the air jet hole 22. The check mechanism 4 is used to control the gas inside the air cavity 201 to be ejected from the air jet hole 22 and prevent the solution inside the aeration tank from flowing into the air cavity 201, thereby ensuring efficient operation of the system.

[0049] Over time, the air jet holes 22 may become clogged due to the accumulation of sludge and microorganisms. To address this problem, a cleaning mechanism 5 is provided on the top of the multi-layer diffuser 2. The cleaning mechanism 5 is used to clean the multi-layer diffuser 2 to prevent the air jet holes 22 from being clogged, thereby reducing the need for manual maintenance and lowering operating costs.

[0050] This multi-layer air diffuser design not only improves oxygen transfer efficiency, but also reduces maintenance workload through the automatic cleaning mechanism 5, reduces energy consumption, and enhances the durability and reliability of the equipment. In addition, by reducing equipment downtime, the continuity and stability of the sewage treatment process are improved, thus providing an economical, efficient and environmentally friendly solution for sewage treatment plants.

[0051] For details, please refer to Figure 2 、 Figure 5 and Figure 6The base 1 has a hollow cavity 11 inside, which allows air to flow inside the base 1. The air supply mechanism 3 includes a blower 31 arranged outside the aeration tank. The blower 31 is responsible for providing the necessary air to the system. The air outlet end of the blower 31 is connected to an air outlet pipe 32, which is a bridge connecting the blower 31 and the multi-layer diffuser 2. One end of the air outlet pipe 32 passes through the interior of the hollow cavity 11 and is connected to the air cavity 201 to ensure that the air can be smoothly transmitted. The air outlet pipe 32 and the air cavity 201 form a continuous airflow channel, so that the compressed air can be evenly distributed to each air jet hole 22, thereby effectively dispersing the air throughout the aeration tank.

[0052] Such a design not only ensures the continuity and uniformity of the air supply, but also simplifies the maintenance and operation process by placing the blower 31 outside the aeration tank. At the same time, the communication design of the hollow cavity 11 and the air cavity 201 allows the air to flow naturally without the need for additional energy, reducing the energy consumption of the system and improving the efficiency and reliability of the entire aeration system. The implementation of this structure provides a stable and sufficient air supply for the aeration tank, which helps to achieve a more efficient sewage treatment process.

[0053] Further, see Figure 2 、 Figure 3 and Figure 11 In this embodiment, the design of the check mechanism 4 is particularly critical. It carefully considers the dual needs of preventing air backflow and promoting bubble generation. Specifically, the check mechanism 4 includes an air injection tube 41 inserted into the air injection hole 22. The bottom end of the air injection tube 41 extends into the air cavity 201 and is connected to the same mounting tube 42. The diameter of the mounting tube 42 is larger than that of the air injection tube 41. This design facilitates smooth air flow.

[0054] The bottom end of the second-stage block 44 is separated from the inside of the mounting ring 43, and the air in the air cavity 201 is allowed to pass through the mounting tube 42 and enter the air injection pipe 41, and finally be sprayed into the inside of the aeration tank to form bubbles.

[0055] This coherent design not only ensures unidirectional air flow and prevents solution backflow, but also achieves smooth air ejection and promotes bubble generation through the movement of the second-stage block 44 and the compression of the spring 1 45 at startup. This sophisticated check mechanism 4 design improves the efficiency of bubble generation and the efficiency of oxygen transfer in the aeration tank, while also reducing maintenance requirements, lowering energy consumption, and enhancing the performance and reliability of the entire multi-layer air diffuser.

[0056] In this embodiment, the design of the cleaning mechanism 5 reflects automation and efficiency, specifically for the continuous operation and maintenance requirements of the multi-layer diffuser 2, see Figure 2 、 Figure 6 、 Figure 7 and Figure 10 The cleaning mechanism 5 includes a rotating rod 51 vertically rotatably mounted on the central axis of the multi-layer diffuser 2, and the two ends of the rotating rod 51 are respectively movable through the top and bottom ends of the multi-layer diffuser 2. A connecting frame 52 is fixed to the top of the rotating rod 51, and a plurality of cleaning components 53 are installed on the connecting frame 52. The plurality of cleaning components 53 correspond to the tops of the plurality of diffusion disks 21 one by one, ensuring that each air jet 22 can be effectively cleaned. The cleaning mechanism 5 also includes a linkage 54 connected between the outlet pipe 32 and the rotating rod 51. The flow of gas inside the outlet pipe 32 can make the linkage 54 drive the rotating rod 51 to rotate, thereby realizing automatic cleaning of the multi-layer diffuser 2;

[0057] The design of the cleaning mechanism 5 cleverly utilizes the flow of gas inside the outlet pipe 32, transmits power to the rotating rod 51 through the connecting piece 54, and then drives the scale cleaning component 53 to continuously clean the air jet 22. This automated cleaning mechanism not only improves the cleaning efficiency and reduces manual intervention, but also ensures the long-term stable operation of the multi-layer air diffuser, reduces the risk of performance degradation due to blockage of the air jet 22, thereby improving the efficiency and reliability of the entire sewage treatment process.

[0058] Further, see Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 7 and Figure 10The design details of the dirt cleaning component 53 reflect its important role in the multi-layer air diffuser. The dirt cleaning component 53 is composed of a plurality of scraping members distributed in a rotating array. The plurality of scraping members in the same dirt cleaning component 53 corresponds to each other, ensuring the comprehensiveness and uniformity of the cleaning process. The scraping member includes a device rod 531 vertically fixed to the bottom of the connecting frame 52, and a scraper 532 is fixed to the bottom end of the device rod 531 and is in contact with the top side of the diffusion disk 21, so as to effectively remove dirt and sediment around the air jet 22 during the cleaning process. The extension line of the length of the scraper 532 does not intersect with the central axis of the multi-layer diffuser 2. Such a geometric layout avoids unnecessary obstruction during the rotation process, ensuring that the scraper 532 can perform the cleaning work smoothly and continuously, and the inclined scraper 532 can remove dirt and sediment from the diffusion disk 21 of the corresponding layer;

[0059] When the cleaning mechanism 5 is started, the rotation of the rotating rod 51 drives the dirt cleaning component 53 on the connecting frame 52 to rotate accordingly, and the scraper 532 on the scraper is close to the top side of the diffusion disk 21, and the sediment around the air injection hole 22 is removed by the rotational motion. This design not only improves the cleaning efficiency, but also reduces the need for manual maintenance through the automated cleaning mechanism, reduces operating costs, and improves the stability and reliability of the equipment.

[0060] For further information, see Figure 2 、 Figure 5 and Figure 6 The linkage 54 includes a wheel box 541 arranged in the middle of the outlet pipe 32 and located inside the hollow cavity 11. A wind wheel 542 is rotatably installed inside the wheel box 541. The rotating shaft of the wind wheel 542 is vertically arranged and the top of the rotating shaft of the wind wheel 542 is fixed with a connecting shaft 543 that movably penetrates the wheel box 541. The top of the connecting shaft 543 is rotatably installed on the bottom side of the multi-layer diffuser 2. A main gear 544 is fixedly sleeved on the connecting shaft 543. The bottom end of the rotating rod 51 is fixedly sleeved with a sub-gear 545 that meshes with the main gear 544. The diameter of the sub-gear 545 is much larger than the diameter of the main gear 544. This design enables the rotating rod 51 to be connected to the air flow inside the outlet pipe 32 through the linkage 54.

[0061] When the gas inside the outlet pipe 32 flows, the wind wheel 542 rotates accordingly, and then drives the main gear 544 on the bottom side of the multi-layer diffuser 2 to rotate through the connecting shaft 543. Since the main gear 544 is engaged with the sub-gear 545 at the bottom end of the rotating rod 51, the rotating rod 51 also rotates accordingly, realizing the automatic start of the cleaning mechanism 5. This design cleverly utilizes the flow energy of the gas inside the outlet pipe 32. Through the transmission system of the wind wheel 542 and the gear, it realizes the automatic cleaning of the multi-layer diffuser 2, reduces the need for manual maintenance, and improves the degree of automation and operating efficiency of the equipment. At the same time, this automatic cleaning mechanism helps to keep the air jet 22 unobstructed, ensures the efficient operation of the air diffuser, and thus improves the efficiency and reliability of the entire sewage treatment process.

[0062] Example 2: In Example 2, we further optimize the multi-layer air diffuser to enhance its performance and ensure the smooth flow of the air jet holes 22. Figure 3 and Figure 11 The inner wall of the jet tube 41 is tapered, and the top diameter is larger than the bottom diameter, which helps the dynamic characteristics of the air flow and promotes the generation of bubbles. A vertical mounting rod 441 is fixed to the top of the second-stage block 44, and a tapered block 442 corresponding to the inner wall of the jet tube 41 is fixed to the top of the mounting rod 441. The height of the tapered block 442 is much smaller than the height of the jet tube 41. This design helps to form local airflow acceleration in the jet hole 22 and further refine the bubbles. The provision of the tapered block 442 has another advantage. When the bottom end of the second-stage block 44 is inserted into the interior of the mounting ring 43, the outer peripheral side of the tapered block 442 fits exactly against the inner wall of the jet tube 41, while sealing it and preventing dirt and sediment from entering the mounting tube 42 and causing the return check mechanism 4 to fail. When the air pressure inside the air cavity 201 increases, it pushes the second-stage block 44 up, and the tapered block 442 rises with it. The tapered block 442 does not contact the inner wall of the jet tube 41, which can ensure the gas is ejected.

[0063] To further improve the efficiency of bubble generation, a cross baffle 411 is fixed to the inner wall of the top end of the air injection pipe 41. This baffle not only limits the conical block 442, but also effectively divides the air to generate more bubbles. This improvement helps to increase the concentration of dissolved oxygen in the aeration tank, thereby improving the sewage treatment effect.

[0064] In addition, the design of the conical block 442 and the cross baffle 411 also helps prevent the air jet hole 22 from being blocked. The use of the conical block 442 and the cross baffle 411 can generate vortices when the airflow passes through. This vortex helps to clear the sediment in the air jet hole 22, thereby reducing maintenance requirements and extending the service life of the equipment.

[0065] Example 3: Example 3 is a further optimization of Example 1. Please refer to Figure 3 、 Figure 4 and Figure 12 The bottom of the device rod 531 is movably provided with a movable rod 533, the scraper 532 is fixed to the bottom end of the movable rod 533, and the top of the movable rod 533 is movably inserted into the bottom end of the device rod 531. The outer side of the device rod 531 and the outer side of the movable rod 533 are fixed with connecting plates 534, and a spring 2 535 is connected between the two connecting plates 534. The bottom side of the scraper 532 is always in contact with the top side of the diffusion disk 21. This design allows the scraper 532 to adapt to the irregularities of the surface of the diffusion disk 21 more flexibly during the cleaning process, thereby improving the cleaning efficiency. This elastic connection not only improves the cleaning effect, but also helps to reduce the damage that the scraper 532 may cause to the diffusion disk 21 during the cleaning process.

[0066] Example 4: Example 4 is a further optimization of Example 1. Please refer to Figure 7 and Figure 10 A vertical support rod 521 is fixed to the bottom of the connecting frame 52. This design provides additional stability and support force, ensuring the stability of the scale cleaning component 53 during operation. The bottom end of the support rod 521 is connected to a ball 522 that rolls on the top side of the base 1, reducing friction, so that the scale cleaning component 53 can move more flexibly with the rotation of the diffusion disk 21.

[0067] Through this optimization, the introduction of the ball 522 not only improves the flexibility of the cleaning mechanism 5, but also reduces the wear caused by friction, thereby extending the service life of the cleaning mechanism 5. In addition, this design also helps to distribute force more evenly during the cleaning process, ensuring that the scraper 532 can always maintain contact with the top side of the diffuser plate 21, thereby effectively removing dirt and sediment around the air jet hole 22.

[0068] Example 5: Example 5 is a further optimization of Example 1. Please refer to Figure 7 and Figure 10 , a number of corresponding device rods 531 are fixedly connected with an annular connecting ring 536, and the diameters of the several connecting rings 536 decrease from bottom to top, forming a stepped structure, which helps to adapt to diffusion disks 21 of different diameters. A number of evenly distributed cutting blades 537 are fixed on the inner and outer sides of the connecting ring 536. The design of these cutting blades 537 can perform secondary cutting on the rising bubbles and increase the dissolved oxygen.

[0069] Example 6: Example 6 is a further optimization of Example 1. Please refer to Figure 2 、 Figure 5 and Figure 6The outlet pipe 32 is connected to the exhaust pipe 321. The exhaust pipe 321 and the blower 31 are respectively located on both sides of the wind wheel 542. The other end of the exhaust pipe 321 passes through the base 1 and the aeration tank in sequence. A control valve is provided on a section of the exhaust pipe 321 located outside the aeration tank. This design makes the exhaust process more direct and efficient. In order to more accurately control the exhaust process, a control valve is provided on a section of the exhaust pipe 321 located outside the aeration tank. This control valve allows the operator to flexibly adjust the exhaust volume according to actual needs, thereby better controlling the air pressure and dissolved oxygen level in the aeration tank.

[0070] When the multi-layer diffuser 2 needs to be cleaned but the inside of the aeration tank does not need dissolved oxygen, the control valve can be opened, and the blower 31 ventilates the outlet pipe 32. The airflow drives the rotating rod 51 to rotate, thereby cleaning the multi-layer diffuser 2. At the same time, the airflow is discharged from the exhaust pipe 321 and will not push the check mechanism 4 open. This optimized design not only improves the operating efficiency of the air diffuser, but also increases the flexibility and controllability of the system. By precisely controlling the exhaust volume, the oxygen level in the aeration tank can be more effectively managed, thereby improving the sewage treatment effect. At the same time, this design also helps to reduce energy consumption and maintenance costs because it allows for less air waste when aeration is not required. In general, this optimized design further improves the performance and practicality of the multi-layer air diffuser.

[0071] Example 7: In Example 7, the multi-layer air diffuser is carefully optimized to improve air quality and protect the components inside the system. Specifically, a filter 322 is added inside the outlet pipe 32. This filter 322 is located between the blower 31 and the wind wheel 542 and can effectively intercept possible impurities and particulate matter before the air flows into the multi-layer diffuser 2.

[0072] The provision of the filter 322 is crucial for maintaining the performance of the wind wheel 542 and the entire air diffuser. By adding this filtering link to the air flow path, large particles can be prevented from entering and damaging the wind wheel 542. At the same time, the air injection pipe 41 is also protected from being blocked, thereby maintaining the efficient operation of the equipment. In addition, the filter 322 can also reduce the wear caused by impurities and extend the service life of the rotating rod 51 and the dirt cleaning component 53.

[0073] When operating this device:

[0074] First, when the system is started, the blower 31 located outside the aeration tank begins to work, compressing the air and delivering it through the outlet pipe 32. One end of the outlet pipe 32 passes through the hollow cavity 11 of the base 1 and is connected to the air cavity 201, thereby ensuring that the air can be smoothly delivered to every part of the multi-layer diffuser 2. The filter 322 inside the outlet pipe 32 intercepts impurities and particulate matter in the air, protecting the wind wheel 542 and the air injection hole 22 from being blocked;

[0075] As the air flows, the impeller 542 rotates in the wheel box 541 in the middle of the outlet pipe 32, and then drives the rotating rod 51 to rotate through the engagement of the connecting shaft 543 and the main gear 544. The top of the rotating rod 51 is fixed with a connecting frame 52, and the dirt cleaning assembly 53 installed on it rotates accordingly, continuously cleaning the air injection holes 22 of the multi-layer diffuser 2.

[0076] When the air supply mechanism 3 is started, the air pressure inside the air cavity 201 increases, pushing the second-stage block 44 to move, compressing the spring 1 45, so that the bottom end of the second-stage block 44 is separated from the inside of the mounting ring 43, thereby allowing air to be ejected from the air injection hole 22 to form bubbles. At the same time, the cross baffle 411 at the top can effectively divide the air and generate more bubbles. At the same time, the rotation of the connecting frame 52 drives the multiple connecting rings 536 to rotate. The multiple cutting blades 537 on the connecting rings 536 perform secondary cutting on the rising bubbles, thereby increasing the dissolved oxygen in the aeration tank.

[0077] When aeration is not in progress, the control valve on the exhaust pipe 321 can be opened. At this time, the blower 31 ventilates the exhaust pipe 32. The airflow drives the rotating rod 51 to rotate to clean the multi-layer diffuser 2. At the same time, the airflow is discharged from the exhaust pipe 321 without pushing open the check mechanism 4.

[0078] It should be noted that the specific model and specifications of the blower 31 need to be selected and determined based on the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail. The principles of these components are clear to those skilled in the art and do not need to be described in detail here.

[0079] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A multi-layer air diffuser for increasing dissolved oxygen in an aeration tank, comprising a base (1), a multi-layer diffuser (2), an air supply mechanism (3), a check mechanism (4) and a cleaning mechanism (5), characterized in that: in: The base (1) is arranged in the aeration tank; The multi-layer diffuser (2) is arranged on the top of the base (1), the multi-layer diffuser (2) is stepped and has an air cavity (201) inside. The multi-layer diffuser (2) is composed of a plurality of diffusion disks (21) distributed up and down, the diameters of the plurality of diffusion disks (21) increase from top to bottom, and the top of each diffusion disk (21) is constructed with a plurality of air jet holes (22) distributed in a rotating array, the air jet holes (22) are connected to the air cavity (201), and the plurality of air jet holes (22) on the same diffusion disk (21) surround the outside of the previous diffusion disk (21); The air supply mechanism (3) is used to supply air into the interior of the air cavity (201); The number of the check mechanisms (4) is plural, and the check mechanisms (4) are installed on the air jet hole (22). The check mechanisms (4) are used to control the gas inside the air cavity (201) to be ejected from the air jet hole (22) and prevent the solution inside the aeration tank from flowing into the air cavity (201). The check mechanism (4) includes an air jet pipe (41) inserted into the air jet hole (22), the bottom end of the air jet pipe (41) penetrates into the air cavity (201) and is connected to a mounting pipe (42), the diameter of the mounting pipe (42) is larger than the diameter of the air jet pipe (41), a mounting ring (43) is fixed on the inner wall of the bottom end of the mounting pipe (42), and a second-stage block (44) is movably provided inside the mounting pipe (42). The diameter of the bottom end of the second-stage block (44) is smaller than the diameter of the top end. The diameter of the bottom end of the second-stage block (44) is the same as the inner diameter of the mounting ring (43) and is movably inserted into the interior of the mounting ring (43). A spring (45) is connected between the top of the second-stage block (44) and the inner wall of the mounting tube (42). The inner wall of the jet tube (41) is tapered and the top diameter is larger than the bottom diameter. A vertical mounting rod (441) is fixed to the top of the second-stage block (44). A conical block (442) corresponding to the inner wall of the jet tube (41) is fixed to the top of the mounting rod (441). The height of the conical block (442) is much smaller than the height of the jet tube (41). A cross baffle (411) is fixed to the inner wall of the top end of the jet tube (41). The cleaning mechanism (5) is arranged at the top of the multi-layer diffuser (2), and the cleaning mechanism (5) is used to clean the multi-layer diffuser (2) to prevent the jet hole (22) from being blocked. The cleaning mechanism (5) includes a rotating rod (51) vertically rotatably mounted on the central axis of the multi-layer diffuser (2), and the two ends of the rotating rod (51) are movable through the top and bottom ends of the multi-layer diffuser (2). A connecting frame (52) is fixed on the top of the rotating rod (51), and a plurality of cleaning components (53) are installed on the connecting frame (52). The plurality of cleaning components (53) correspond to the tops of the plurality of diffusion discs (21) respectively. The cleaning mechanism (5) also includes a connecting member (54) connected between the outlet pipe (32) and the rotating rod (51), through which the gas inside the outlet pipe (32) is moved. The flow can cause the linkage (54) to drive the rotating rod (51) to rotate, and the linkage (54) includes a wheel box (541) arranged in the middle of the air outlet pipe (32) and located inside the hollow cavity (11), and a wind wheel (542) is rotatably installed inside the wheel box (541), and the rotating shaft of the wind wheel (542) is vertically arranged and the top end of the rotating shaft of the wind wheel (542) is fixed with a connecting shaft (543) that movably passes through the wheel box (541), and the top end of the connecting shaft (543) is rotatably installed on the bottom side of the multi-layer diffuser (2), and a main gear (544) is fixed on the connecting shaft (543), and a sub-gear (545) meshing with the main gear (544) is fixed on the bottom end of the rotating rod (51), and the diameter of the sub-gear (545) is much larger than the diameter of the main gear (544).

2. A multi-layer air diffuser for increasing dissolved oxygen in an aeration tank according to claim 1, characterized in that: The base (1) is internally structured with a hollow cavity (11), and the air supply mechanism (3) comprises a blower (31) arranged outside the aeration tank, the air outlet end of the blower (31) is connected to an air outlet pipe (32), and one end of the air outlet pipe (32) passes through the interior of the hollow cavity (11) and is in communication with the air cavity (201).

3. A multi-layer air diffuser for increasing dissolved oxygen in an aeration tank according to claim 2, characterized in that: The cleaning assembly (53) is composed of a plurality of scraping members distributed in a rotating array. The plurality of scraping members in the same cleaning assembly (53) correspond to each other, and the scraping member includes a device rod (531) vertically fixed to the bottom of the connecting frame (52). A scraper (532) is fixed at the bottom end of the device rod (531) and is in contact with the top side of the diffusion plate (21). The extension line of the length of the scraper (532) does not intersect with the central axis of the multi-layer diffuser (2).

4. A multi-layer air diffuser for increasing dissolved oxygen in an aeration tank according to claim 3, characterized in that: A movable rod (533) is movably provided at the bottom of the device rod (531), the scraper (532) is fixed to the bottom end of the movable rod (533), and the top end of the movable rod (533) is movably inserted into the bottom end of the device rod (531). Connecting plates (534) are fixed to the outer sides of the device rod (531) and the movable rod (533), and a second spring (535) is connected between the two connecting plates (534). The bottom side of the scraper (532) is always in contact with the top side of the diffusion plate (21).

5. A multi-layer air diffuser for increasing dissolved oxygen in an aeration tank according to claim 4, characterized in that: A vertical support rod (521) is fixed to the bottom of the connecting frame (52), and the bottom end of the support rod (521) is ball-connected to a ball (522) that rolls on the top side of the base (1).

6. The multi-layer air diffuser for increasing dissolved oxygen in an aeration tank according to claim 5, characterized in that: An annular connecting ring (536) is fixedly connected between a plurality of corresponding device rods (531), and the diameters of the plurality of connecting rings (536) decrease from bottom to top. A plurality of evenly distributed cutting blades (537) are fixed on the inner and outer circumferential sides of the connecting ring (536).

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