Integrated aeration stirring device for sewage treatment AOA process adjustable area

Abstract

The utility model relates to an integrated aeration stirring device for a sewage treatment AOA process adjustable area, which comprises a first rod, a second rod and a third rod, a first cavity is arranged in the first rod, two ends of the first rod are respectively a first end and a second end, the first end is rotatably connected with an air pipe communicated with the first cavity, and the second end is rotatably connected with a second cavity; an air hole communicated with the first cavity is formed in the second end; a first outer gear is arranged on the periphery of the first end, and stirring blades are arranged on the periphery of the second end; a second outer gear meshed with the first outer gear is arranged outside an output shaft of the motor; the air pump communicates with the end, away from the first rod, of the air pipe and is used for supplying air to the first cavity. Through the arrangement, the stirring and aeration functions are integrated in one device, so that the occupied space of equipment is reduced, and the device is particularly suitable for a sewage treatment AOA process adjustable area with limited space.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an integrated aeration and stirring device for an adjustable zone of an AOA process of sewage treatment. Background Art

[0002] The AOA (Anaerobic-Oxic-Anoxic) process is a wastewater treatment process with three main functional zones: the anaerobic zone, the aerobic zone, and the anoxic zone. The AOA process introduces wastewater into anaerobic, aerobic, and anoxic environments in sequence, utilizing the metabolic activities of different microorganisms to effectively remove pollutants such as organic matter, nitrogen, and phosphorus from the water. It has the advantages of high efficiency and low energy consumption. The anaerobic zone is usually equipped with a stirring device to ensure solid-liquid mixing in the wastewater and enhance phosphorus release; the aerobic zone is usually equipped with an aeration device to provide sufficient oxygen for aerobic decomposition and nitrification of organic matter.

[0003] To better adapt to changes in water quality, water quantity, and environmental conditions (such as temperature) to ensure the treatment effect of the AOA process, an adjustable zone can be set between the anaerobic and aerobic zones. The adjustable zone changes the treatment function by switching the stirring / aeration mode. Similarly, an adjustable zone can also be set between the aerobic and anoxic zones.

[0004] In the prior art, the realization of stirring and oxygen supply functions usually requires two devices, which is costly and lacks flexibility. Utility Model Content

[0005] In order to solve the above-mentioned defects, the utility model proposes an integrated aeration and stirring device for the adjustable zone of the AOA process of sewage treatment.

[0006] The technical solution adopted by the utility model is an integrated aeration and stirring device for the adjustable zone of the AOA process for sewage treatment, comprising:

[0007] A first rod having a first cavity disposed therein, the first rod having first and second ends, the first end being rotatably connected to an air pipe communicating with the first cavity, and the second end being provided with an air hole communicating with the first cavity; a first external gear being disposed on the outer periphery of the first end, and a stirring blade being disposed on the outer periphery of the second end;

[0008] a motor, wherein the output shaft of the motor is provided with a second external gear meshing with the first external gear;

[0009] An air pump is communicated with an end of the air pipe away from the first rod and is used for supplying air to the first cavity.

[0010] Preferably, a second cavity communicating with the first cavity is provided in the stirring blade, and at least part of the air holes are opened on the stirring blade and communicate with the second cavity.

[0011] Preferably, the axis of the air hole forms an angle of 30 to 45 degrees with the surface of the stirring blade.

[0012] Preferably, the diameter of the air hole at one end away from the first cavity is larger than the diameter of the air hole at one end close to the first cavity.

[0013] Preferably, a filter is provided on the air hole.

[0014] Preferably, the first rod includes a plurality of sleeves with different diameters, the plurality of sleeves are slidably sleeved along the axial direction thereof, and the first cavity is arranged inside the plurality of sleeves.

[0015] Preferably, any two adjacent sleeves are sealed and connected via a sealing member, which is a sealing ring or a sealing film.

[0016] Preferably, the stirring blade is detachably connected to the first rod.

[0017] Preferably, the stirring blade is configured to be in the shape of a propeller.

[0018] Preferably, it further includes a second rod, which is rotatably connected to the inside of the first rod, the first cavity is opened in the second rod, and the air pipe is fixedly connected to one end of the second rod and communicates with the first cavity inside the second rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The integrated aeration and stirring device for the adjustable zone of the AOA process for wastewater treatment, described in this utility model, integrates stirring and aeration functions into a single device, reducing equipment procurement and installation costs and eliminating the need for two separate stirring and aeration devices. The integration of stirring blades with the aeration piping reduces the number of components requiring maintenance in the system, enabling faster equipment maintenance, reducing downtime, and improving system operational stability and maintenance efficiency. The adjustable zone allows for flexible control of oxygen supply and stirring by adjusting the operating status of the aeration and stirring device's air pump and motor. Based on process requirements, the aeration-only, stirring-only, or a combination of aeration and stirring can be selected under varying operating conditions to optimize the transition between the anaerobic and aerobic zones. Through its integrated design and intelligent control, the aeration and stirring device can precisely adjust the oxygen concentration and stirring intensity in the water, promoting the degradation of organic matter in wastewater, the release of phosphorus, and the removal of nitrogen. This enhances the efficiency of microbial metabolic activity in the AOA process, making it suitable for wastewater treatment projects of varying scales. Furthermore, by combining low-aeration with slow stirring, sludge settling can be prevented even under low aeration conditions, while also improving oxygen mass transfer.

[0021] 2. The air holes are located on the mixing blades. When the motor drives the mixing blades to rotate, the rotation of the blades not only stirs the sewage but also releases gas through the air holes on the blade surface, thereby combining the aeration process with the stirring process to achieve a more even distribution of aeration. The water flow movement caused by the rotation of the mixing blades can further help the bubbles to be distributed more evenly in the water body, making the aeration coverage larger, avoiding the problems of gas concentration or localized dissolved oxygen deficiency existing in traditional aeration devices, greatly improving aeration efficiency, reducing energy consumption and equipment complexity, and enhancing the overall sewage treatment effect. In addition, the rotation of the mixing blades will also cause intense mixing and disturbance of the water flow, causing the water flow to flush the air holes on the surface of the mixing blades, thereby reducing the adhesion of particulate matter to the air hole surface and greatly reducing air hole blockage.

[0022] 3. The retractable design of the first rod allows the aeration and stirring device to flexibly adjust the rod length according to the specific conditions of the sewage treatment site (such as pool depth and treatment volume), adapting to the needs of different water depths. It can precisely adjust the aeration position and gas distribution, improve oxygen utilization, and be applied to more types of sewage treatment scenarios, ensuring the compatibility of the aeration and stirring device in different environments. In addition, by precisely adjusting the length of the first rod, the problem of excessive air delivery path is reduced, the gas transmission efficiency from the air pump to the air hole is improved, and air pressure loss is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in detail below with reference to the embodiments and accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the adjustable area of ​​the integrated aeration and stirring device used in the AOA process for sewage treatment.

[0025] 10. Anaerobic zone;

[0026] 20. Adjustable area; 21. First rod; 22. Motor; 23. Air pump; 24. Mixing blade; 25. Air hole; 26. Air pipe;

[0027] 30. Aerobic zone;

[0028] 40. Hypoxic zone. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are illustrative and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0030] In one embodiment, an integrated aeration and stirring device for an adjustable zone of an AOA process for sewage treatment, such as Figure 1 As shown, it includes a first rod 21, a motor 22 and an air pump 23. The two ends of the first rod 21 are respectively a first end and a second end, and a first cavity is provided inside the first rod 21.

[0031] The first end of the first rod 21 is rotatably connected to an air pipe 26 that communicates with the first cavity. The second end defines an air hole 25 that also communicates with the first cavity. An air pump 23 is connected to the end of the air pipe 26 that is distal from the first rod 21 and is used to supply air to the first cavity. Thus, air pump 23 supplies air, which passes through air pipe 26 and the first cavity in sequence before being discharged through air hole 25, thereby achieving aeration of the AOA process adjustable zone 20 for wastewater treatment. This, in turn, facilitates aerobic decomposition and nitrification of organic matter in the AOA process adjustable zone 20 in an oxygen-rich environment.

[0032] A first external gear is provided on the outer periphery of the first end of the first rod 21, and a stirring blade 24 is provided on the outer periphery of the second end. A second external gear is provided on the outer periphery of the output shaft of the motor 22, which meshes with the first external gear. Driven by the motor 22, the first rod 21 can rotate the stirring blade 24 thereon. The rotating stirring blade 24 stirs the wastewater in the AOA process adjustable zone 20, ensuring solid-liquid mixing in the wastewater and enhancing phosphorus release.

[0033] The integrated aeration and stirring device for the adjustable zone of the AOA process for sewage treatment in this embodiment reduces the purchase and installation costs of the equipment by integrating the stirring and aeration functions into one device, and no longer requires two independent stirring and aeration devices. The mixing blades 24 are combined with the aeration pipes 26 to reduce the number of components that need to be maintained in the system, enabling rapid equipment maintenance, reducing downtime, and improving the stability and maintenance efficiency of the system operation. The adjustable zone 20 can achieve flexible control of oxygen supply and stirring by adjusting the working state of the air pump 23 and the motor 22 of the aeration and stirring device. According to process requirements, under different operating conditions, a combination of aeration only, stirring only, or simultaneous aeration and stirring can be selected to optimize the transition effect between the anaerobic zone 10 and the aerobic zone 30. Through integrated design and intelligent control, the aeration and stirring device can accurately adjust the oxygen concentration and stirring intensity in the water body, promote the degradation of organic matter in sewage, the release of phosphorus and the removal efficiency of nitrogen, enhance the efficiency of microbial metabolic activities in the AOA process, and is suitable for sewage treatment projects of different scales. Furthermore, by combining a small amount of aeration with slow stirring, it is possible to ensure that the sludge does not settle under low aeration conditions, and also to increase the oxygen mass transfer effect.

[0034] The air holes may be provided in the middle of the plurality of stirring blades on the second end of the first rod.

[0035] An adjustable zone may also be provided between the aerobic zone and the anoxic zone. The integrated aeration and stirring device for the adjustable zone of the sewage treatment AOA process in this embodiment may also be used in the adjustable zone between the aerobic zone and the anoxic zone.

[0036] In one embodiment, a second cavity is provided in the stirring blade 24, and at least some of the air holes 25 are provided on the stirring blade 24. The air holes 25 are connected to the second cavity, and the second cavity is connected to the first cavity, that is, the air holes 25 are connected to the first cavity through the second cavity, so that the gas provided by the air pump 23 can diffuse into the sewage through the air holes 25 on the stirring blade 24. The air holes 25 can be distributed on the upper surface, lower surface or side edge of the stirring blade 24. When the motor 22 drives the stirring blade 24 to rotate, the rotation of the blade not only stirs the sewage, but also releases gas through the air holes 25 on the blade surface, thereby combining the aeration process with the stirring process to achieve a more uniform distribution of aeration. The water flow movement brought about by the rotation of the stirring blade 24 can further help the bubbles to be distributed more evenly in the water body, so that the aeration coverage area is larger, avoiding the problems of gas concentration or local dissolved oxygen deficiency existing in traditional aeration devices, greatly improving the aeration efficiency, reducing energy consumption and equipment complexity, and enhancing the overall effect of sewage treatment. In addition, the rotation of the stirring blade 24 will also cause strong mixing and disturbance of the water flow, so that the water flow has a flushing effect on the pores 25 on the surface of the stirring blade 24, thereby reducing the adhesion of particles to the surface of the pores 25 and greatly reducing the blockage of the pores 25.

[0037] In one embodiment, the axis of the air hole 25 forms an angle of 30 to 45 degrees with the surface of the stirring blade 24. The air hole 25 is opened on the stirring blade 24 at an inclined angle, so that when the air hole 25 releases gas, the diffusion path of the bubble in the liquid is longer, which increases the contact time between the bubble and water, reduces gas loss, and optimizes the uniformity and efficiency of aeration.

[0038] In one embodiment, when the air hole 25 is opened at the end of the first rod 21, the axis of the air hole 25 and the end surface of the first rod 21 can also be set to form an angle of 30 degrees to 45 degrees to optimize the uniformity of aeration.

[0039] In one embodiment, the diameter of the end of the pore 25 away from the first cavity is larger than the diameter of the end closer to the first cavity, that is, the pore 25 is tapered or funnel-shaped, gradually expanding from the inside out. The larger outer opening of the pore 25 provides a wider air outlet space for the pore 25, making it difficult for particulate matter and dirt to accumulate at the outlet of the pore 25, thereby significantly reducing the risk of clogging of the pore 25. In addition, the smaller inner diameter of the pore 25 can appropriately compress the airflow upon entry. When the gas passes through the pore 25, it is released at the enlarged outer opening, producing a stronger jet effect, helping the bubbles to be ejected from the pore 25 more quickly and diffuse rapidly into the sewage, thereby increasing the surface area of ​​the bubbles and improving the efficiency of oxygen transfer.

[0040] In one embodiment, a filter is provided on the air hole 25 to further prevent particles or dirt from entering the air hole 25, thereby reducing the risk of clogging of the air hole 25. The filter can be made of materials such as stainless steel, plastic, or polyester fiber. The mesh size of the filter needs to be designed according to the characteristics of the particles in the sewage, such as approximately 0.1-1 mm, which can effectively intercept larger particles (such as suspended solids, sediment, etc.) while ensuring smooth passage of gas.

[0041] In one embodiment, a hydrophobic membrane may be provided on the pore 25. The hydrophobic membrane may be made of high-performance polymer materials such as PTFE (polytetrafluoroethylene) and PVDF (polyvinylidene fluoride), which can effectively prevent moisture from passing through while maintaining good gas permeability.

[0042] In one embodiment, first rod 21 comprises multiple sleeves of varying diameters, with the smaller-diameter sleeve located internally and the larger-diameter sleeve located externally. The multiple sleeves are slidably coupled together along their axial direction, and each sleeve can slide axially relative to the others, allowing first rod 21 to freely extend and retract. A first cavity is disposed within the multiple sleeves. This cavity is responsible for conveying gas from air pump 23 through air pipe 26 into the sleeves, and then to air holes 25 for aeration. The extension and retraction of first rod 21 can be manually or automatically adjusted, with automatic adjustment utilizing pneumatic, hydraulic, or electric devices.

[0043] The retractable design of the first rod 21 allows the aeration and stirring device to flexibly adjust its rod length based on the specific conditions of the sewage treatment site (such as pool depth and treatment volume), adapting to the needs of different water depths. This allows precise adjustment of aeration position and gas distribution, improving oxygen utilization, and enabling its application in a wider range of sewage treatment scenarios, ensuring the aeration and stirring device's compatibility in diverse environments. Furthermore, by precisely adjusting the length of the first rod 21, the problem of excessively long air delivery paths is reduced, improving the efficiency of gas transmission from the air pump 23 to the air holes 25 and reducing air pressure loss.

[0044] In one embodiment, any two adjacent sleeves are sealed and connected by a seal, and the seal is a sealing ring or a sealing film. By providing a seal, the two adjacent sleeves can maintain sealing performance when they are extended and retracted, preventing gas leakage and sewage intrusion, and greatly improving the safety and operational reliability of the device. The seal can be made of elastic materials such as silicone and rubber. When the seal is a sealing ring, the sealing ring is embedded in the contact surface of the two adjacent sleeves to play a sealing role. When the sleeves slide against each other, the sealing ring can maintain close contact to prevent gas and water leakage. When the seal is a sealing film, the sealing film can be made of a flexible film material, such as polytetrafluoroethylene (PTFE), etc. The sealing film is coated on the connection between the two sleeves to form a protective film to prevent sewage from invading the interior of the rod body. The sealing film is thinner than the sealing ring and can reduce sliding friction.

[0045] In one embodiment, locking structures, such as snap-on, threaded, or pin-type locking structures, may be provided between the multiple sleeves of the first rod 21. When the first rod 21 is extended or retracted to a target length, the locking structures can tightly lock adjacent sleeves to prevent displacement or loosening of the device due to external forces, thereby ensuring the reliability of the integrated aeration and stirring device during long-term use.

[0046] In one embodiment, the stirring blades 24 are detachably connected to the first rod 21. The stirring blades 24 are a component that is prone to wear and tear. Their detachable design eliminates the need to replace the entire aeration and stirring device when necessary, effectively reducing maintenance costs and extending the device's overall service life. Furthermore, operators can replace different types of stirring blades 24 based on varying sewage treatment requirements, improving treatment efficiency and broadening the device's applicability.

[0047] In one embodiment, the stirring blade 24 is configured to be propeller-shaped. By rotating the propeller-shaped stirring blade 24 , the sewage can generate an obvious circulation flow in the adjustable area 20 , thereby more efficiently promoting the flow and mixing of the liquid.

[0048] In one embodiment, the integrated aeration and stirring device for the adjustable zone of the sewage treatment AOA process further includes a second rod, which is rotatably connected to the interior of the first rod 21. For example, the two rods can be rotatably connected via a bearing or a sliding device. The outer diameter of the second rod is smaller than the inner diameter of the first rod 21, so that the first rod 21 can rotate freely under the drive of the motor 22, and the second rod will not be interfered with by the rotation of the first rod 21. The first cavity is opened in the second rod, and the air pipe 26 is fixedly connected to one end of the second rod and communicates with the first cavity therein, so that the gas provided by the air pump 23 is transmitted from the air pipe 26 and the first cavity in the second rod to the air hole 25. The second rod can remain stationary when the first rod 21 rotates, ensuring that the aeration function of the device is not affected by the stirring function, improving the operational stability of the device, reducing maintenance costs, and enhancing the reliability of the device.

[0049] In this specification, the use of terms such as "Embodiment 1," "this embodiment," or "in one embodiment" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example; furthermore, the specific features, structures, materials, or characteristics described may be appropriately combined in any one or more embodiments or examples.

[0050] In the description of this specification, the terms "connect," "install," "fix," "dispose," and "have" are to be understood in a broad sense. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0051] In the description of this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.

[0052] The above description of the embodiments is to facilitate ordinary technicians in this technical field to understand and apply the technology of this case. People familiar with the technology in this field can obviously make various modifications to these examples easily and apply the general principles described here to other embodiments without having to go through creative work. Therefore, this case is not limited to the above embodiments. Modifications to the following situations should all be within the scope of protection of this case: ① A new technical solution implemented based on the technical solution of this utility model and combined with existing common knowledge, the technical effect produced by the new technical solution does not exceed the technical effect of this utility model; ② The equivalent replacement of some features of the technical solution of this utility model with common technology, the technical effect produced is the same as the technical effect of this utility model; ③ The technical solution of this utility model can be expanded, and the substantive content of the expanded technical solution does not exceed the technical solution of this utility model; ④ The equivalent transformation made by using the contents of the description and drawings of this utility model is directly or indirectly applied to other related technical fields.

Claims

1. An integrated aeration and stirring device for the adjustable zone of the AOA process for sewage treatment, characterized in that: include: A first rod having a first cavity disposed therein, the first rod having first and second ends, the first end being rotatably connected to an air pipe communicating with the first cavity, and the second end being provided with an air hole communicating with the first cavity; a first external gear being disposed on the outer periphery of the first end, and a stirring blade being disposed on the outer periphery of the second end; a motor, wherein the output shaft of the motor is provided with a second external gear meshing with the first external gear; An air pump is communicated with an end of the air pipe away from the first rod and is used for supplying air to the first cavity.

2. The aeration and stirring device according to claim 1, characterized in that: A second cavity communicating with the first cavity is provided in the stirring blade, and at least part of the air holes are opened on the stirring blade and communicate with the second cavity.

3. The aeration and stirring device according to claim 2, characterized in that: The axis of the air hole forms an angle of 30 to 45 degrees with the surface of the stirring blade.

4. The aeration and stirring device according to any one of claims 1 to 3, characterized in that: A diameter of an end of the air hole away from the first cavity is larger than a diameter of an end of the air hole close to the first cavity.

5. The aeration and stirring device according to any one of claims 1 to 3, characterized in that: A filter is provided on the air hole.

6. The aeration and stirring device according to claim 1, characterized in that: The first rod includes a plurality of sleeves with different diameters. The plurality of sleeves are slidably sleeved along the axial direction of the first rod, and the first cavity is arranged inside the plurality of sleeves.

7. The aeration and stirring device according to claim 6, characterized in that: Any two adjacent sleeves are sealed and connected via a sealing member, which is a sealing ring or a sealing film.

8. The aeration and stirring device according to claim 1, characterized in that: The stirring blade is detachably connected to the first rod.

9. The aeration and stirring device according to claim 1, characterized in that: The stirring blade is configured in a propeller shape.

10. The aeration and stirring device according to claim 1, characterized in that: It also includes a second rod, which is rotatably connected to the inside of the first rod. The first cavity is opened in the second rod. The air pipe is fixedly connected to one end of the second rod and communicates with the first cavity inside the second rod.

Images