Aeration device for large-area wastewater basins
By independently equipping each aeration unit of a large wastewater pond with a blower and an online dissolved oxygen monitor, individual adjustment of each area is achieved, solving the problems of slow response speed and complex adjustment, and improving the response speed and energy efficiency of the aeration device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG SHUIQING ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-19
AI Technical Summary
The aeration devices in large wastewater ponds have slow response speeds and complex adjustments when the influent water quality fluctuates, leading to abnormal aerobic microorganisms and increased treatment costs.
Each aeration unit is equipped with an independent blower and an online dissolved oxygen monitor. The opening of the regulating valve or the frequency of the blower is adjusted based on the data from the monitor, so that each area can be individually regulated.
It simplifies the adjustment process, has a fast response speed, reduces energy consumption and maintenance impact, and improves operating efficiency and aeration flexibility.
Smart Images
Figure CN224377797U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment, and in particular to an aeration device for a large-area wastewater pond. Background Technology
[0002] The aeration device in the wastewater tank is one of the key pieces of equipment in the sewage treatment process. It is mainly used to oxygenate the wastewater, promote the growth of aerobic microorganisms, and thus decompose organic pollutants in the water.
[0003] Currently, for small-area wastewater ponds and wastewater ponds with relatively stable influent water quality, the dissolved oxygen in the wastewater pond is usually uniformly regulated by setting up aeration pipelines evenly distributed throughout the wastewater pond and a sufficient number of evenly distributed aerators, and supplying air through a set of blowers. For large-area wastewater ponds such as large industrial wastewater ponds and municipal sewage treatment plant wastewater ponds, while continuing to use the aeration devices for small-area wastewater ponds, in order to address the difficulty in regulating dissolved oxygen due to uneven resistance in the aeration pipeline caused by the large volume of the wastewater pond itself, technicians have divided the overall aeration pipeline into multiple aeration units. These units are connected to the main air supply pipe through several air supply branch pipes, and regulating valves are installed on each air supply branch pipe. In addition, high-power blowers are used to supply air to the main air supply pipe to improve the problem of uneven air supply.
[0004] Through extensive practical experience, the inventors discovered that, under the influence of influent water quality fluctuations and fluctuations between the inlet and outlet of large wastewater ponds, existing aeration schemes for large-area wastewater ponds require frequent adjustments to the opening of various regulating valves when the influent water quality fluctuations are relatively small. When the influent water quality fluctuations are relatively large, it involves adjusting the operating frequency of the blower. Adjusting the blower operating frequency is accompanied by adjusting the opening of all branch pipe valves. The blower operating frequency adjustment speed is slow, and this complex valve adjustment process leads to a slow response speed, which usually exceeds 2 minutes. The long response time can lead to abnormalities or even loss of aerobic microorganisms, increasing treatment costs. The abnormalities and loss of microorganisms will further generate the need to adjust the aeration volume. Therefore, existing aeration schemes have the problems of high control difficulty and slow response speed. Utility Model Content
[0005] Based on this, the purpose of this utility model is to provide an aeration device for a large-area wastewater pond. By independently setting up a blower to supply air to a group of aeration units and independently equipping them with an online dissolved oxygen monitor to monitor dissolved oxygen, the staff can adjust the opening of each regulating valve or adjust the operating frequency of each blower through the data of each dissolved oxygen monitor, so as to realize the individual adjustment of the aeration volume of each area. The adjustment process is simple and the response speed is fast.
[0006] An aeration device for a large-area wastewater pond includes a wastewater pond, several blowers, several aeration units, several main air supply pipes, several regulating valves, and several online dissolved oxygen monitors. The blowers are located outside the wastewater pond, the aeration units are arranged inside the wastewater pond, the two ends of the several main air supply pipes are respectively connected to the output ends of the several blowers and the input ends of the several aeration units, the several regulating valves are respectively installed on the several main air supply pipes, and the several online dissolved oxygen monitors are respectively fixed on the several aeration units.
[0007] The aeration device for large-area wastewater ponds described in this utility model consists of a set of aeration units, each equipped with an independent blower for air supply and an independent online dissolved oxygen monitor for monitoring dissolved oxygen. This allows staff to adjust the opening of each regulating valve or the operating frequency of each blower based on the data from each dissolved oxygen monitor, thereby achieving individual adjustment of the aeration volume for each area. The adjustment process is simple and has a fast response speed.
[0008] Furthermore, the aeration unit includes an outer air supply pipe, an aeration pipe, and an aeration disc. The input end of the outer air supply pipe is connected to the main air supply pipe. The aeration pipe is located between the outer air supply pipes and communicates with them. The aeration pipe is provided with aeration holes. The aeration disc is fixed to the aeration pipe and communicates with the aeration holes.
[0009] Furthermore, the distance between the peripheral air supply pipe and the inner wall of the wastewater pool is 280-320 mm, and the distance between adjacent aeration units is 280-320 mm.
[0010] Furthermore, the outer air supply pipe forms a rectangle, the input end of the outer air supply pipe is located in the middle of one side of the rectangular outer air supply pipe, the aeration pipe is arranged parallel to the side where the input end of the outer air supply pipe is located, and both ends of the aeration pipe are connected to the outer aeration pipe.
[0011] Furthermore, the detection end of the online dissolved oxygen monitor is located in the middle of the aeration unit.
[0012] Furthermore, the fan is an air-suspended fan. Using an air-suspended fan helps reduce energy consumption.
[0013] Furthermore, the regulating valve is an electrically operated regulating valve. Using an electrically operated regulating valve improves the convenience of regulation.
[0014] Furthermore, the main gas transmission pipe includes a heat-resistant section and a corrosion-resistant section. The heat-resistant section is located above the liquid surface of the wastewater tank, and the corrosion-resistant section is located below the liquid surface of the wastewater tank. The gas transmission pipe below the liquid surface of the wastewater tank uses corrosion-resistant pipes such as UPVC pipes to reduce the corrosion caused by wastewater on the pipes, while the gas transmission pipe above the liquid surface of the wastewater tank uses heat-resistant pipes to avoid pipe deformation caused by exposure to sunlight.
[0015] Furthermore, the system also includes several safety valves, which are located between the fan and the regulating valve. These safety valves are manual valves. The safety valves are installed to provide protection in case of a malfunction in the regulating valve.
[0016] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the aeration device for a large-area wastewater pond according to one embodiment;
[0018] Figure 2 This is a schematic diagram of the aeration device for a large-area wastewater pond according to one embodiment;
[0019] The components include: wastewater tank 1, blower 2, aeration unit 3, external air supply pipe 31, aeration pipe 32, aeration disc 33, main air supply pipe 4, heat-resistant section 41, corrosion-resistant section 42, regulating valve 5, safety valve 6, and online dissolved oxygen monitor 7. Detailed Implementation
[0020] It should be understood that the described embodiments are merely some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.
[0021] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0022] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0023] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0024] It should be understood that the embodiments of this application are not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments of this application is limited only by the appended claims.
[0025] This utility model embodiment provides an aeration device for a large-area wastewater pond. Please refer to [link / reference]. Figure 1 and Figure 2 The system includes a wastewater tank, several blowers, several aeration units, several main air supply pipes, several regulating valves, several safety valves, and several online dissolved oxygen monitors. In this embodiment, the bottom of the wastewater tank is rectangular. The blowers are air-suspended blowers located outside the wastewater tank. The aeration units are arranged inside the wastewater tank and include an outer air supply pipe, aeration pipes, and aeration discs. The outer air supply pipes form a rectangle, with a distance of 280-320 mm between them and the inner wall of the wastewater tank. The distance between adjacent aeration units is also 280-320 mm. The input end of the outer air supply pipe is located at the middle of one side of the rectangular outer air supply pipe and is connected to the main air supply pipe. The aeration pipes are located between the outer air supply pipes and are parallel to the side where the input end of the outer air supply pipe is located. Both ends of the aeration pipes are connected to the outer aeration pipes. Each aeration pipe has several aeration holes facing the top of the wastewater tank. The aeration discs are fixed to the aeration pipes. The position of the aeration disc corresponds to the position of several aeration holes, and the aeration disc is connected and communicates with the aeration holes; in other embodiments, the density of aeration holes and the spacing between adjacent aeration pipes can be set according to the service surface of the aeration disc to ensure uniform aeration; both ends of several main air supply pipes are connected and communicated with the output ends of several blowers and the input ends of several aeration units (i.e., the input ends of the peripheral air supply pipes), respectively. The main air supply pipes include a heat-resistant section and a corrosion-resistant section. The heat-resistant section is located above the liquid surface of the wastewater tank and uses UPVC pipe, while the corrosion-resistant section is located below the liquid surface of the wastewater tank and uses steel pipe. The heat-resistant section and the corrosion-resistant section are connected by flanges. Several regulating valves are respectively installed on the heat-resistant sections of several main air supply pipes, and several safety valves are respectively installed on the heat-resistant sections of several main air supply pipes. The safety valves are located between the blowers and the regulating valves. In this embodiment, the regulating valves are electric regulating valves, and the safety valves are manual valves; several online dissolved oxygen monitors are respectively fixed on several aeration units and located in the middle of the aeration units.
[0026] This utility model embodiment provides an aeration device for a large-area wastewater tank 1. Please refer to [link / reference]. Figure 1 and Figure 2 The system includes a wastewater tank 1, several blowers 2, several aeration units 3, several main air supply pipes 4, several regulating valves 5, several safety valves 6, and several online dissolved oxygen monitors 7. In this embodiment, the bottom surface of the wastewater tank 1 is rectangular. The blowers 2 are air-suspended blowers located outside the wastewater tank 1. The aeration units 3 are arranged inside the wastewater tank 1. Each aeration unit 3 includes an outer air supply pipe 31, an aeration pipe 32, and an aeration disc 33. The outer air supply pipe 31 forms a rectangle, and the distance between the outer air supply pipe 31 and the inner wall of the wastewater tank 1 is 280-300 mm. The distance between adjacent aeration units 3 is 280-320mm. The input end of the outer air supply pipe 31 is located at the middle of one side of the rectangular outer air supply pipe 31. The input end of the outer air supply pipe 31 is connected to the main air supply pipe 4. The aeration pipe 32 is located between the outer air supply pipes 31 and is parallel to the side where the input end of the outer air supply pipe 31 is located. Both ends of the aeration pipe 32 are connected to the outer aeration pipe 32. The aeration pipe 32 is provided with several aeration holes, which are set towards the top of the wastewater tank 1. The aeration disc 33 is fixed on the aeration pipe 32. The positions of several aeration discs 33 correspond to the positions of several aeration holes, and the aeration discs 33 are connected and communicate with the aeration holes; in other embodiments, the density of aeration holes and the spacing of adjacent aeration pipes 32 can be set according to the service surface of the aeration discs 33 to ensure uniform aeration; the two ends of several air supply main pipes 4 are respectively connected and communicated with the output ends of several blowers 2 and the input ends of several aeration units 3 (i.e., the input ends of peripheral air supply pipes 31). The air supply main pipes 4 include a heat-resistant section 41 and a corrosion-resistant section 42. The heat-resistant section 41 is located above the liquid surface of the wastewater tank 1 and adopts... Using UPVC pipe, the corrosion-resistant section 42 is located below the liquid surface of the wastewater tank 1. Steel pipe is used, and the heat-resistant section 41 and the corrosion-resistant section 42 are connected by flanges. Several regulating valves 5 are respectively installed on the heat-resistant sections 41 of several gas transmission main pipes 4. Several safety valves 6 are respectively installed on the heat-resistant sections 41 of several gas transmission main pipes 4. The safety valves 6 are located between the blower 2 and the regulating valves 5. In this embodiment, the regulating valves 5 are electric regulating valves, and the safety valves 6 are manual valves. Several online dissolved oxygen monitors 7 are respectively fixed on several aeration units 3 and located in the middle of the aeration units 3.
[0027] An aeration device for a large-area wastewater tank 1 according to an embodiment of this utility model consists of a group of aeration units 3 each independently equipped with a blower 2 for air supply and an online dissolved oxygen monitor 7 for dissolved oxygen monitoring. This allows each group of aeration units 3, along with their corresponding blowers 2 and regulating valves 5, to operate independently without interfering with each other. Operators can adjust the opening of each regulating valve 5 or the operating frequency of each blower 2 based on the data from each dissolved oxygen monitor, achieving individual adjustment of the aeration volume for each area without considering the impact of adjustments on other aeration units 3. This simplifies the adjustment process. Furthermore, the pipeline length between the blower 2 and each aeration unit 3 is relatively short. The response time can be controlled between 10 and 30 seconds, and it also has the advantage of fast response speed, which can more effectively deal with water quality fluctuations, especially large water quality fluctuations. On the other hand, since each blower 2 is independent of each other, the load variation range of blower 2 is relatively limited, which can ensure that blower 2 operates at the optimal efficiency point, improve operating efficiency, and reduce aeration energy consumption by 15% to 30% compared with the scheme of a single blower 2 supplying air to multiple aeration units 3. In addition, the aeration device of a large-area wastewater pool 1 in this embodiment of the utility model does not require a complete shutdown when performing local maintenance, and local failure will not lead to a complete shutdown, which can reduce the impact of maintenance and repair on wastewater treatment.
[0028] As a specific usage method, when the online dissolved oxygen monitor 7 detects a dissolved oxygen concentration of less than 2 mg / L, if the regulating valve 5 is not fully open, the opening of the regulating valve 5 is slowly increased, for example, by increasing the valve opening by 10° every hour, until the dissolved oxygen concentration is in the range of 2-4 mg / L. If the regulating valve 5 is fully open, the flow output of the corresponding fan 2 is increased until the dissolved oxygen concentration is in the range of 2-4 mg / L. When the online dissolved oxygen monitor 7 detects a dissolved oxygen concentration of 4 mg / L, if the opening of the regulating valve 5 is >10°, the opening of the regulating valve 5 is slowly decreased, for example, by decreasing the valve opening by 10° every hour, until the dissolved oxygen is in the range of 2-4 mg / L. If the opening of the regulating valve 5 reaches 10°, the flow output of the corresponding fan 2 is reduced until the dissolved oxygen is in the range of 2-4 mg / L.
[0029] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.
Claims
1. An aeration device for a large-area wastewater pond, characterized in that, The system includes a wastewater tank, several blowers, several aeration units, several main air supply pipes, several regulating valves, and several online dissolved oxygen monitors. The blowers are located outside the wastewater tank, the aeration units are arranged inside the wastewater tank, the two ends of the several main air supply pipes are respectively connected to the output ends of the several blowers and the input ends of the several aeration units, the several regulating valves are respectively installed on the several main air supply pipes, and the several online dissolved oxygen monitors are respectively fixed on the several aeration units.
2. The aeration device for a large-area wastewater pond according to claim 1, characterized in that, The aeration unit includes an outer air supply pipe, an aeration pipe, and an aeration disc. The input end of the outer air supply pipe is connected to the main air supply pipe. The aeration pipe is located between the outer air supply pipes and communicates with them. The aeration pipe is provided with aeration holes. The aeration disc is fixed to the aeration pipe and communicates with the aeration holes.
3. The aeration device for a large-area wastewater pond according to claim 2, characterized in that, The distance between the outer air supply pipe and the inner wall of the wastewater pool is 280-320mm, and the distance between adjacent aeration units is 280-320mm.
4. The aeration device for a large-area wastewater pond according to claim 2, characterized in that, The outer air supply pipes form a rectangle, with the input end of the outer air supply pipe located at the middle of one side of the rectangular outer air supply pipe. The aeration pipe is arranged parallel to the side where the input end of the outer air supply pipe is located, and both ends of the aeration pipe are connected to the outer air supply pipe.
5. The aeration device for a large-area wastewater pond according to claim 1, characterized in that, The detection end of the online dissolved oxygen monitor is located in the middle of the aeration unit.
6. The aeration device for a large-area wastewater pond according to claim 1, characterized in that, The fan is an air suspension fan.
7. The aeration device for a large-area wastewater pond according to claim 1, characterized in that, The regulating valve is an electric regulating valve.
8. The aeration device for a large-area wastewater pond according to claim 1, characterized in that, The main gas transmission pipe includes a heat-resistant section and a corrosion-resistant section. The heat-resistant section is located above the liquid surface of the wastewater tank, and the corrosion-resistant section is located below the liquid surface of the wastewater tank.
9. The aeration device for a large-area wastewater pond according to claim 1, characterized in that, It also includes several safety valves, which are disposed between the fan and the regulating valve, and the safety valves are manual valves.