Circulating multi-flow state aeration device and sewage treatment device

Abstract

This application discloses a circulating multi-flow aeration device and a wastewater treatment device. The circulating multi-flow aeration device includes several aerators and an air distribution connection device. The air distribution connection device is connected to the several aerators to introduce air into them. The aerators are spaced with perforated areas to form a circulating alternating structure of perforated area → aeration zone → perforated area → aeration zone, thereby creating a multi-stage circulating multi-flow state. In use, the aerator of this invention can form an alternating pattern of perforated area → aeration zone → perforated area → aeration zone, simultaneously generating multiple flow states of gas and liquid. This multi-flow state allows microorganisms in the wastewater to play different roles in different areas. This flow state results in more complete liquid flow throughout the tank. The aeration zone enhances nitrification in aerobic processes, while the perforated zone generates denitrification. This simultaneous nitrification and denitrification reaction greatly improves wastewater treatment efficiency.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment equipment technology, and in particular to a circulating multi-flow aeration device and a wastewater treatment device. Background Technology

[0002] In wastewater treatment, activated sludge treatment has become one of the important methods for treating urban wastewater, leading to the development of a series of new treatment processes, such as: two-stage activated sludge process (AB process), biological nitrogen and phosphorus removal processes (A / O, A2 / O process), biological fluidized bed, intermittent (sequencing batch reactor) activated sludge process, and biological filter, etc. These processes and methods can further improve wastewater treatment efficiency and reduce treatment costs.

[0003] However, aeration is a key step in various wastewater treatment processes. The purpose of aeration is to ensure that dissolved oxygen, organic matter, and microorganisms in the activated sludge in the aeration tank are fully mixed and in contact, thereby accelerating the degradation process of pollutants and improving wastewater treatment efficiency.

[0004] Patent CN201921992392.9 discloses a highly efficient microporous aerator for wastewater purification, comprising a front cover, an inlet one-way valve, an aeration membrane locking device, an aeration membrane, an inner air inlet pipe, and a rear cover. The aeration membrane is provided with air outlet holes, and the inner air inlet pipe is provided with an air outlet hole and an inner air inlet pipe outlet one-way valve. This patent allows airflow at a certain pressure to be input through the outer air inlet pipe. The airflow opens the inlet one-way valve and enters the inner air inlet pipe. The airflow then opens the outlet one-way valve of the inner air inlet pipe and flows directly from the air outlet holes on the aeration membrane to the wastewater for treatment.

[0005] It is evident that existing aeration devices result in a single flow pattern in the wastewater mixture during aeration, and the microorganisms are in a single state with the mixture during aeration. It is difficult to achieve multiple flow patterns and form multi-stage circulation. Therefore, the circulation of the mixed liquor is not ideal, leading to low efficiency and extremely high energy consumption in the aeration process.

[0006] Therefore, a high-efficiency and energy-saving aerator is crucial for wastewater treatment and is an important part of energy conservation and emission reduction in wastewater treatment. It plays a decisive role in the energy conservation and emission reduction of the entire wastewater treatment process. Utility Model Content

[0007] This application is made in view of the above-mentioned problems, and its purpose is to provide a circulating multi-flow aeration device and a sewage treatment device, which realizes the effective distribution and circulation of air in each level of aerator through the cooperation of several aerators and air distribution connection devices.

[0008] Specifically, the first aspect of this application provides a circulating multi-flow aeration device, including a plurality of aerators and an air distribution connection device. The air distribution connection device is connected to the plurality of aerators and is used to introduce air into the plurality of aerators. The plurality of aerators are provided with intermittent hollow areas to form a circulating alternating structure of hollow area → aeration area → hollow area → aeration area, thereby forming a multi-stage circulating multi-flow state.

[0009] Furthermore, the aforementioned aerators are two-stage or higher aerators.

[0010] Furthermore, the aerator includes a perforated area and an aeration area, with the perforated area located inside the aeration area.

[0011] Furthermore, the aeration zone includes a base plate, an aeration membrane, and fasteners, with the aeration membrane mounted on the base plate via the fasteners.

[0012] Furthermore, the fastener includes a pressure strip and a bolt, the pressure strip being disposed along the edge of the aeration membrane and the pressure strip being mounted on the base plate by the bolt.

[0013] Furthermore, the plurality of aerators includes a primary aerator and a secondary aerator, wherein the diameter of the primary aerator is smaller than the diameter of the secondary aerator, and the primary aerator is disposed inside the secondary aerator, and there is a gap between the primary aerator and the secondary aerator.

[0014] Furthermore, the plurality of aerators includes a plurality of aerators with the same or different diameters, and the plurality of aerators are arranged at intervals by means of a perforated area.

[0015] Furthermore, the gas distribution connection device includes an air inlet connector and a gas distribution connector. The first end of the air inlet connector is used to connect with the gas distribution connector, and the second end of the air inlet connector is used to connect with the air supply device. The gas distribution connector is provided with a plurality of ventilation connecting rods, which are used to connect with the bottom plate of the aerator.

[0016] Furthermore, both the air intake connector and the air distribution connector are hollow structures.

[0017] A second aspect of this application provides a wastewater treatment apparatus, including the aforementioned circulating multi-flow aeration device.

[0018] This utility model has the following beneficial effects:

[0019] The circulating multi-flow aeration device of this invention achieves effective distribution and circulation of air in each level of aerator through the cooperation of several aerators and air distribution connection devices. The hollowed-out areas between the aerators form a circulating alternating structure, which allows the mixed liquid to present multiple flow states during the aeration process, improves the contact efficiency between microorganisms and mixed liquids with different flow states, and enhances the nitrification reaction in aerobic processes.

[0020] The alternating structure allows the hollow areas to create pure liquid zones as the bubbles rise, while simultaneously possessing a certain denitrification capacity, thereby accelerating nitrification and denitrification and greatly improving wastewater treatment efficiency.

[0021] Furthermore, the aerator structure of this invention is rationally designed, easy to install and maintain, further improving the practicality and economy of the device. Therefore, the circulating multi-flow aeration device and wastewater treatment device of this application have broad application prospects in the field of wastewater treatment. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a circulating multi-flow aeration device;

[0024] Figure 2 This is an exploded view of a circulating multi-flow aeration device;

[0025] Figure 3 This is a schematic diagram of the gas distribution connection device.

[0026] The following are the reference numerals: 1. Primary aerator; 2. Secondary aerator; 3. Hollowed-out area; 4. Aeration zone; 5. Air distribution connection device; 6. Pressure strip; 7. Bolt; 8. Air inlet connector; 9. Air distribution connector; 10. Ventilation rod; 11. Interface; 12. Base plate; 13. Aeration membrane.

[0027] The purpose, features, and advantages of this accompanying drawing will be further explained in conjunction with the embodiments and with reference to the accompanying drawing. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following description and illustration are provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0029] Obviously, the following description is merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios without any inventive effort. Furthermore, it is understood that although the effort involved in such development may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0030] See Figures 1 to 3 An embodiment of the first aspect of this application provides a circulating multi-flow aeration device, including a plurality of aerators and an air distribution connection device 5. The air distribution connection device 5 is connected to the plurality of aerators and is used to introduce air into the plurality of aerators. The plurality of aerators are provided with intermittent hollow areas to form a circulating alternating structure of hollow area → aeration area → hollow area → aeration area, thereby forming a multi-stage circulating multi-flow state.

[0031] The air distribution connection device 5 is connected to each aerator, ensuring that air can be evenly and effectively distributed to each aerator. During aeration, air enters the aerator through the air distribution connection device 5. Because there are interspersed perforated zones 3 between the aerators, and the width of the aeration zone 4 is roughly the same as that of the perforated zone 3, the perforated zone 3 and the aeration zone 4 are arranged alternately, forming a unique circulating alternating structure. This structure allows the mixed liquor to continuously flow between the perforated zone 3 and the aeration zone 4 during aeration, achieving a multi-stage circulating multi-flow state. This flow state results in more complete liquid flow throughout the tank. The aeration zone enhances nitrification in the aerobic process, while the perforated zone produces denitrification. This simultaneous nitrification and denitrification reaction greatly improves wastewater treatment efficiency.

[0032] The circulating multi-flow aeration device of this application achieves effective distribution and circulation of air in each level of aerator through the cooperation of several aerators and air distribution connection device 5. The hollowed-out area 3 between the aerators forms a circulating alternating structure, which allows the mixed liquid to present multiple flow states during the aeration process, improves the contact efficiency between microorganisms and the mixed liquid, and thus accelerates the degradation of pollutants.

[0033] In this embodiment, the aerators are two-stage or higher aerators. The aerators are two-stage, three-stage, four-stage, or higher; setting multiple stages of aerators can further improve the aeration effect, allowing microorganisms in the mixed liquor to come into more sufficient contact with dissolved oxygen, thereby improving wastewater treatment efficiency. Air is evenly distributed between each aerator stage via an air distribution connection device 5, ensuring that each aerator receives an appropriate amount of air for aeration.

[0034] See Figure 1 In this embodiment, the aerator includes a perforated area 3 and an aeration area 4, with the perforated area 3 disposed inside the aeration area 4. The diameter of the perforated area 3 is approximately equal to the width of the aeration area 4. By designing the perforated area 3 inside the aeration area 4, aeration is achieved by air flowing upwards from the aeration area 4. The perforated area 3 serves as a mixed liquid flow circulation area, forming a cyclical alternation of perforated area 3 → aeration area → perforated area → aeration area on the aeration device containing multi-stage aerators, thereby creating a multi-stage circulating multi-flow state.

[0035] See Figure 1 In this embodiment, the aeration zone 4 includes a base plate 12, an aeration membrane 13, and fasteners. The aeration membrane 13 is mounted on the base plate 12 using fasteners. The base plate 12 and the aeration membrane 13 have the same structure, namely a frame structure with a central hollow core. The aeration membrane 13 is mounted on the base plate 12 using fasteners, forming a sealed aeration space. The fasteners securely fix the aeration membrane 13 to the base plate 12 along the edge of the aeration zone 4, preventing displacement or damage to the aeration membrane 13 during aeration and ensuring the aeration effect. Meanwhile, the aeration membrane 13 is made of high-quality materials, possessing good air permeability and corrosion resistance, enabling long-term stable operation in harsh wastewater environments. Furthermore, the base plate 12 is also provided with an interface 11 for connecting to the air distribution connection device 5, through which air is introduced into the aeration membrane 13.

[0036] In this embodiment, the fasteners include a pressure strip 6 and bolts 7. The pressure strip 6 is disposed along the edge of the aeration membrane 13 and is installed on the base plate 12 by bolts 7 and nuts. The tight connection between the pressure strip 6 and bolts 7 ensures a stable connection between the aeration membrane 13 and the base plate 12, improving the overall stability and durability of the aeration device. During aeration, air enters the aeration membrane 13 through the air distribution connection device 5. Due to the good permeability of the aeration membrane 13, the air can be evenly distributed within the aeration zone 4, fully contacting the microorganisms in the mixed liquid and accelerating the degradation process of pollutants.

[0037] See Figure 1 and Figure 2In this embodiment, the plurality of aerators includes a primary aerator 1 and a secondary aerator 2. The diameter of the primary aerator 1 is smaller than the diameter of the secondary aerator 2, and the primary aerator 1 is disposed inside the secondary aerator 2. A gap is provided between the primary aerator 1 and the secondary aerator 2. This embodiment takes a two-stage aerator as an example, with the primary aerator 1 disposed inside the secondary aerator 2. In another preferred embodiment, a three-stage aerator or more aerators can also be disposed, and the same progressively contained structure can be adopted. This multi-stage design with different diameters makes the distribution of air in each stage of the aerator more uniform, while increasing the flow path and flow pattern diversity of the mixed liquid, further improving the wastewater treatment efficiency. During use, the secondary aerator 2 surrounds the primary aerator 1, creating two hollow areas and two aeration areas. The hollow areas are areas for the flow and circulation of mixed liquid, thus forming an alternation of hollow area → aeration area → hollow area → aeration area, generating multiple flow states of gas and liquid alternation. These multiple flow states enable microorganisms in the wastewater to play different roles in different areas, thereby greatly improving the wastewater treatment efficiency.

[0038] In another preferred embodiment, the plurality of aerators includes a plurality of aerators with the same or different diameters, which are spaced apart. The aerators with the same or different diameters can be arranged on the same plane or different planes, and the aeration zones are spaced apart by the perforated areas. This design provides greater flexibility, allowing the layout and number of aerators to be adjusted according to specific wastewater treatment needs and conditions. When using aerators with the same diameter, it ensures relatively uniform air distribution in each aerator, suitable for treating relatively uniform wastewater. When using aerators with different diameters, the air distribution and mixed liquor flow can be further optimized by adjusting the combination and arrangement of aerators with different diameters to adapt to the needs of different water qualities and treatment processes.

[0039] In this embodiment, the air distribution connection device 5 includes an air inlet connector 8 and an air distribution connector 9. The first end of the air inlet connector 8 is used to connect to the air distribution connector 9, and the second end of the air inlet connector 8 is used to connect to the air supply device. The air distribution connector 9 is provided with several ventilation rods 10, which are used to connect to the bottom plate of the aerator. The air inlet connector 8 is a hollow screw, or other components that can achieve the same function. The ventilation rods 10 are fixedly connected to or detachably connected to the bottom plate. Furthermore, both the air inlet connector 8 and the air distribution connector 9 have an internal hollow structure, allowing air to smoothly enter the air distribution connector 9 from the air supply device through the air inlet connector 8, and then be evenly distributed to each aerator through the ventilation rods 10. The internal hollow structure of the air inlet connector 8 and the air distribution connector 9 not only reduces the overall weight of the device but also facilitates smooth air transmission and reduces energy consumption. The connection between the ventilation connecting rod 10 and the aerator base plate is flexible and diverse. It can be either a fixed connection to ensure long-term operational stability or a detachable connection to facilitate device maintenance and repair.

[0040] A second aspect of this application provides a wastewater treatment apparatus, including the aforementioned circulating multi-flow aeration device.

[0041] This wastewater treatment device significantly improves wastewater treatment efficiency by introducing a circulating multi-flow aeration system. In practical applications, the air supply device delivers air into the air inlet connector, which then distributes it through the air distribution connector. The air is then evenly distributed into each aerator via the air venting rod. The perforated and aeration zones inside the aerators ensure full contact between the air and the mixed liquor during aeration. Simultaneously, the perforated areas between the aerators promote multi-stage circulation of the mixed liquor, increasing the diversity of flow patterns.

[0042] Furthermore, the circulating multi-flow aeration device in this wastewater treatment unit is easy to install and maintain. The flexible connection between the air linkage and the aerator base plate allows for easy disassembly and replacement of components when needed, reducing maintenance costs. At the same time, the aerator's rational structural design can withstand significant water pressure and airflow impact, ensuring the long-term stable operation of the unit.

[0043] In summary, the circulating multi-flow aeration device and wastewater treatment device of this application, through innovative structural design, achieve effective distribution and circulation of air in each stage of the aerator, improving the contact efficiency between microorganisms and the mixed liquor, and accelerating the degradation process of pollutants. This device has broad application prospects in the field of wastewater treatment and can provide a more efficient and energy-saving solution for urban wastewater treatment.

[0044] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A circulating multi-flow aeration device, characterized in that, It includes several aerators and a gas distribution connection device (5). The gas distribution connection device (5) is connected to several aerators and is used to introduce air into several aerators. There are spaced hollow areas between several aerators to form a circulating alternating structure of hollow area → aeration area → hollow area → aeration area, which is used to form a multi-stage circulating multi-flow state.

2. The circulating multi-flow aeration device according to claim 1, characterized in that, The aforementioned aerators are two-stage or higher aerators.

3. The circulating multi-flow aeration device according to claim 1, characterized in that, The aerator includes a hollow area (3) and an aeration area (4), wherein the hollow area (3) is disposed inside the aeration area (4).

4. The circulating multi-flow aeration device according to claim 3, characterized in that, The aeration zone (4) includes a base plate (12), an aeration membrane (13), and fasteners. The aeration membrane (13) is mounted on the base plate (12) by fasteners.

5. The circulating multi-flow aeration device according to claim 4, characterized in that, The fasteners include a pressure strip (6) and a bolt (7), the pressure strip (6) being arranged along the edge of the aeration membrane and the pressure strip (6) being mounted on the base plate (12) by the bolt (7).

6. The circulating multi-flow aeration device according to claim 3, characterized in that, The plurality of aerators include a primary aerator (1) and a secondary aerator (2). The diameter of the primary aerator (1) is smaller than that of the secondary aerator (2), and the primary aerator (1) is located inside the secondary aerator (2). There is a gap between the primary aerator (1) and the secondary aerator (2).

7. The circulating multi-flow aeration device according to claim 3, characterized in that, The plurality of aerators includes a plurality of aerators with the same or different diameters, and the plurality of aerators are arranged at intervals by means of a hollow area.

8. The circulating multi-flow aeration device according to claim 4, characterized in that, The gas distribution connection device (5) includes an air inlet connector (8) and a gas distribution connector (9). The first end of the air inlet connector (8) is used to connect with the gas distribution connector (9), and the second end of the air inlet connector (8) is used to connect with the gas supply device. The gas distribution connector (9) is provided with a plurality of ventilation rods (10), and the ventilation rods (10) are used to connect with the bottom plate of the aerator.

9. The circulating multi-flow aeration device according to claim 8, characterized in that, Both the intake connector (8) and the air distribution connector (9) are hollow structures.

10. A wastewater treatment device, characterized in that, Includes the circulating multi-flow aeration device as described in any one of claims 1-9.

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