Circulating multi-flow-state aeration device and sewage treatment device

Abstract

The invention relates to a circulating multi-flow-state aeration device and a sewage treatment plant, the circulating multi-flow-state aeration device comprises a plurality of aerators and an air distribution connecting device, the air distribution connecting device is connected with the plurality of aerators and is used for introducing air into the plurality of aerators, spaced hollow areas are arranged among the plurality of aerators, and the air distribution connecting device is connected with the plurality of aerators and is used for introducing air into the plurality of aerators. The device is used for forming a circulation alternating structure of a hollow area, an aeration area, a hollow area and an aeration area, and further is used for forming a multi-stage circulation multi-flow state. When the aerator is used, the hollow area-aeration area-hollow area-aeration area alternation can be formed, meanwhile, gas-liquid alternation multiple flow states can be generated, microorganisms in sewage can play different roles in different areas through the multiple flow states, liquid in the whole pool can flow more sufficiently through the generation of the flow states, and the aeration effect is better. The aeration area enhances the nitrification effect in the aerobic process, the hollow area generates the denitrification effect, and the nitrification and the denitrification react at the same time, so that the sewage treatment efficiency is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment devices, and in particular to a circulating multi-flow aeration device and a sewage treatment device. Background Art

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

[0003] However, in various sewage treatment processes, aeration is a key link. The purpose of aeration is to allow the dissolved oxygen, organic matter and microorganisms in the aeration tank to fully mix and contact, thereby accelerating the degradation process of pollutants and improving sewage treatment efficiency.

[0004] Patent CN201921992392.9 discloses a microporous aerator for efficient sewage purification, including a front cover, an air inlet check valve, an aeration diaphragm locking device, an aeration diaphragm, an inner air inlet pipe, and a rear cover: the aeration diaphragm is provided with an aeration diaphragm air outlet hole, and the inner air inlet pipe is provided with an air outlet hole and an inner air inlet pipe air outlet check valve. The patent inputs a certain air pressure through the outer air inlet pipe, and the airflow pushes open the air inlet check valve and enters the inner air inlet pipe. The airflow then pushes open the inner air inlet pipe air outlet check valve and flows directly from the air hole on the aeration diaphragm to the sewage for sewage treatment.

[0005] It can be seen that when the existing aeration device is aerating, the mixed liquid in the sewage has a single flow state, and the microorganisms are in a single state with the mixed liquid during aeration, making it difficult to achieve multiple flow states and difficult to form a multi-stage cycle. Therefore, the circulation flow of the mixed liquid is not ideal, resulting in low efficiency and huge energy consumption in the aeration treatment process.

[0006] Therefore, an efficient and energy-saving aerator is crucial for sewage treatment. It is also an important link in energy conservation and emission reduction of sewage treatment. It plays a decisive role in energy conservation and emission reduction of the entire sewage treatment process. Summary of the invention

[0007] The present 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 circulating flow of air in each level of aerators through the cooperation of several aerators and air distribution connection devices.

[0008] Specifically, the first aspect of the present application provides a circulating multi-fluid state aeration device, including a number of aerators and an air distribution connection device. The air distribution connection device is connected to the number of aerators for introducing air into the number of aerators. There is an interval hollow area between the number of aerators for forming a circulating alternating structure of hollow area → aeration area → hollow area → aeration area, and further for forming a multi-stage circulating multi-fluid state.

[0009] Further, the number of aerators is two-stage or above two-stage aerators.

[0010] Further, the aerator includes a hollow area and an aeration area, and the hollow area is arranged inside the aeration area.

[0011] Further, the aeration area includes a bottom plate, an aeration membrane and fasteners, and the aeration membrane is arranged on the bottom plate through the fasteners.

[0012] Further, the fasteners include a pressing strip and bolts. The pressing strip is arranged along the edge of the aeration membrane and the pressing strip is installed on the bottom plate through the bolts.

[0013] Further, the number of aerators includes a primary aerator and a secondary aerator. The diameter of the primary aerator is smaller than that of the secondary aerator, and the primary aerator is arranged inside the secondary aerator, and there is an interval between the primary aerator and the secondary aerator.

[0014] Further, the number of aerators includes a number of aerators with the same or different diameters, and the number of aerators are arranged at intervals through the hollow areas.

[0015] Further, the air distribution connection device includes an air inlet connection part and an air distribution connection part. The first end of the air inlet connection part is used to connect with the air distribution connection part, and the second end of the air inlet connection part is used to connect with a gas supply device; a number of ventilation connecting rods are arranged on the air distribution connection part, and the ventilation connecting rods are used to connect with the bottom plate of the aerator.

[0016] Further, both the air inlet connection part and the air distribution connection part are internal hollow structures.

[0017] The second aspect of the present application provides a sewage treatment device, including the circulating multi-fluid state aeration device described above.

[0018] The present invention has the following beneficial effects: The circulating multi-fluid state aeration device of the present invention realizes the effective distribution and circulating flow of air in each stage of aerators through the cooperation of a number of aerators and an air distribution connection device. The interval hollow area between the aerators forms a circulating alternating structure, enabling the mixed liquid to present multiple fluid states during the aeration process, improving the contact efficiency between microorganisms and the mixed liquid in different fluid states, and enhancing the nitrification reaction in aerobic conditions.

[0019] The alternating structure enables pure liquid regions to be generated in the hollowed-out areas when the bubbles rise, and at the same time has a certain denitrification ability, thus accelerating nitrification and denitrification and greatly improving the sewage treatment efficiency.

[0020] In addition, the aerator of the present invention has a reasonable structural design, is easy to install and maintain, and further improves the practicability and economy of the device. Therefore, the circulating multi-fluid state aeration device and the sewage treatment device of the present application have broad application prospects in the field of sewage treatment. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present drawings or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present drawings. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of the circulating multi-fluid state aeration device; Figure 2 It is an exploded view of the circulating multi-fluid state aeration device; Figure 3 It is a schematic structural diagram of the gas distribution connection device.

[0023] Explanation of the reference numerals in the drawings: 1. Primary aerator; 2. Secondary aerator; 3. Hollowed-out area; 4. Aeration area; 5. Gas distribution connection device; 6. Press strip; 7. Bolt; 8. Intake connection part; 9. Gas distribution connection part; 10. Ventilation connecting rod; 11. Interface; 12. Bottom plate; 13. Aeration membrane. The realization, functional features and advantages of the purpose of the present drawings will be further described with reference to the embodiments and the drawings. Detailed Embodiments

[0024] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will describe and explain the present application in combination with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided by the present application without creative efforts belong to the scope of protection of the present application.

[0025] Obviously, the following description is only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing, or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be understood as the content disclosed in the present application being insufficient.

[0026] See Figures 1 to 3 , an embodiment of the first aspect of the present application provides a circulating multi-fluid state 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. There is an interval hollow area between the plurality of aerators, which is used to form a circulating alternating structure of hollow area → aeration area → hollow area → aeration area, and further used to form a multi-stage circulating multi-fluid state.

[0027] The air distribution connection device 5 is connected to each aerator to ensure that air can be evenly and effectively distributed to each aerator. During the aeration process, air enters the aerator through the air distribution connection device 5. Since there is an interval hollow area 3 between the aerators, there is an interval hollow area 3 between the plurality of aerators, and the width of the aeration area 4 is quite the same as that of the hollow area 3, and the hollow area 3 and the aeration area 4 are arranged alternately, thus forming a unique circulating alternating structure. This structure enables the mixed liquid to continuously flow between the hollow area 3 and the aeration area 4 during the aeration process, realizing a multi-stage circulating multi-fluid state. The generation of this fluid state makes the liquid flow in the whole pool more sufficient. The aeration area enhances the nitrification in aerobic conditions, and the hollow area generates denitrification. The simultaneous reaction of nitrification and denitrification greatly improves the sewage treatment efficiency.

[0028] The circulating multi-fluid state aeration device of the present invention realizes the effective distribution and circulating flow of air in each stage of aerators through the cooperation of a plurality of aerators and the air distribution connection device 5. The interval hollow area 3 between the aerators forms a circulating alternating structure, enabling the mixed liquid to present multiple fluid states during the aeration process, improving the contact efficiency between microorganisms and the mixed liquid, and thus accelerating the degradation of pollutants.

[0029] In this embodiment, the plurality of aerators are two-stage or more than two-stage aerators. The aerators are two-stage, three-stage, four-stage or more stages. Setting multiple stages of aerators can further improve the aeration effect, enabling the microorganisms in the mixed liquid to contact the dissolved oxygen more fully, thereby improving the sewage treatment efficiency. The air is evenly distributed between each stage of aerators through the air distribution connection device 5 to ensure that each aerator can obtain an appropriate amount of air for aeration.

[0030] See Figure 1 In this embodiment, the aerator includes a hollow area 3 and an aeration area 4, and the hollow area 3 is arranged inside the aeration area 4. The diameter of the hollow area 3 is equivalent to the width of the aeration area 4. Through the design of arranging the hollow area 3 inside the aeration area 4, the aeration is such that air flows upward from the aeration area 4, and the hollow area 3 is the circulating area for the mixed liquid to flow. A circulating and alternating state of hollow area 3 → aeration area → hollow area → aeration area is formed on the aeration device including multiple-stage aerators, thereby forming a multi-stage circulating multi-flow state.

[0031] See Figure 1 In this embodiment, the aeration area 4 includes a bottom plate 12, an aeration membrane 13 and fasteners. The aeration membrane 13 is arranged on the bottom plate 12 through the fasteners. The bottom plate 12 and the aeration membrane 13 have the same structure, that is, a frame structure with a hollow center. The aeration membrane 13 is arranged on the bottom plate 12 through the fasteners to form a sealed aeration space. The fasteners firmly fix the aeration membrane 13 on the bottom plate 12 along the edge of the aeration area 4, preventing the aeration membrane 13 from shifting or being damaged during the aeration process and ensuring the aeration effect. At the same time, the aeration membrane 13 is made of high-quality materials, has good air permeability and corrosion resistance, and can operate stably in a harsh sewage environment for a long time. In addition, an interface 11 for connecting to the air distribution connection device 5 is also provided on the bottom plate 12, and air is introduced onto the aeration membrane 13 through the air distribution connection device 5.

[0032] In this embodiment, the fasteners include a pressing strip 6 and bolts 7. The pressing strip 6 is arranged along the edge of the aeration membrane 13 and is installed on the bottom plate 12 through the bolts 7 and nuts. Through the tight combination of the pressing strip 6 and the bolts 7, the stable connection between the aeration membrane 13 and the bottom plate 12 is ensured, improving the overall stability and durability of the aeration device. During the aeration process, air enters the aeration membrane 13 through the air distribution connection device 5. Due to the good air permeability of the aeration membrane 13, the air can be evenly distributed in the aeration area 4, fully contacting the microorganisms in the mixed liquid and accelerating the degradation process of pollutants.

[0033] See Figure 1 and Figure 2, in this embodiment, the several 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 disposed inside the secondary aerator 2, with a gap between the primary aerator 1 and the secondary aerator 2. Taking two - stage aerators as an example in this embodiment, the primary aerator 1 is arranged inside the secondary aerator 2. In another preferred embodiment, three - stage aerators or more aerators can also be set, and the structure of gradually containing each other can also be adopted. This design with multiple stages and different diameters makes the distribution of air in each stage of the aerator more uniform. At the same time, it increases the flow path and flow pattern diversity of the mixed liquid, further improving the sewage treatment efficiency. During use, the secondary aerator 2 surrounds the primary aerator 1, generating two hollow areas and two aeration areas. The hollow areas are the flow - circulation areas of the mixed liquid, thus forming an alternation of hollow area → aeration area → hollow area → aeration area, and at the same time generating various gas - liquid alternating flow patterns. The multiple flow patterns enable microorganisms in the sewage to play different roles in different areas, thereby greatly improving the sewage treatment efficiency.

[0034] In another preferred embodiment, the several aerators include several aerators with the same or different diameters, and the several aerators are arranged at intervals. The several aerators with the same or different diameters can be arranged on the same plane or different planes. Through the hollow areas, the aeration areas are formed in a structure with intervals. This design provides greater flexibility and can adjust the layout and quantity of the aerators according to specific sewage treatment requirements and conditions. When using aerators with the same diameter, it can ensure relatively uniform distribution of air in each aerator, which is suitable for treating relatively uniform sewage. When using aerators with different diameters, the combination and arrangement of aerators with different diameters can be adjusted to further optimize air distribution and mixed - liquid flow to meet the requirements of different water qualities and treatment processes.

[0035] In this embodiment, the air distribution connection device 5 includes an air inlet connecting piece 8 and an air distribution connecting piece 9. The first end of the air inlet connecting piece 8 is used to connect with the air distribution connecting piece 9, and the second end of the air inlet connecting piece 8 is used to connect with the air supply device; several ventilation connecting rods 10 are arranged on the air distribution connecting piece 9, and the ventilation connecting rods 10 are used to connect with the bottom plate of the aerator. The air inlet connecting piece 8 is a hollow screw, or it can be other components that can achieve the same function. The ventilation connecting rod 10 and the bottom plate are fixedly connected or detachably connected. Further, both the air inlet connecting piece 8 and the air distribution connecting piece 9 have an internal hollow structure, so that air can smoothly enter the air distribution connecting piece 9 from the air supply device through the air inlet connecting piece 8, and then be evenly distributed to each aerator through the ventilation connecting rod 10. The internal hollow structures of the air inlet connecting piece 8 and the air distribution connecting piece 9 not only reduce the overall weight of the device, but also facilitate the smooth transmission of air, reducing energy consumption. The connection method between the ventilation connecting rod 10 and the bottom plate of the aerator is flexible. It can either choose a fixed connection to ensure the stability of long-term operation, or choose a detachable connection to facilitate the maintenance and repair of the device.

[0036] An embodiment of the second aspect of the present application provides a sewage treatment device, including the circulating multi-flow state aeration device described above.

[0037] By introducing the circulating multi-flow state aeration device, the sewage treatment efficiency of this sewage treatment device is significantly improved. In practical applications, the air supply device sends air into the air inlet connecting piece. After being distributed by the air distribution connecting piece, the air evenly enters each aerator through the ventilation connecting rod. The design of the hollow area and the aeration area inside the aerator enables the air and the mixed liquid to fully contact during the aeration process. At the same time, the spaced hollow areas between the aerators promote the multi-stage circulating flow of the mixed liquid, increasing the flow state diversity.

[0038] In addition, the circulating multi-flow state aeration device in this sewage treatment device is easy to install and maintain. The flexible connection method between the ventilation connecting rod and the bottom plate of the aerator enables convenient disassembly and replacement of components when needed, reducing the maintenance cost. At the same time, the structure design of the aerator is reasonable, and it can withstand large water pressure and air flow impacts, ensuring the long-term stable operation of the device.

[0039] In summary, through the innovative structural design, the circulating multi-flow state aeration device and the sewage treatment device of the present application achieve the effective distribution and circulating flow of air in each stage of the aerator, improve the contact efficiency between microorganisms and the mixed liquid, and accelerate the degradation process of pollutants. This device has a wide application prospect in the field of sewage treatment and can provide a more efficient and energy-saving solution for urban sewage treatment.

[0040] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are only examples, and embodiments having the same composition and achieving the same effects as the technical idea within the scope of the technical solution of this application are all included in the technical scope of this application. In addition, within the scope of not departing from the gist of this application, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways constructed by combining some constituent elements in the embodiments are also included in the scope of this application.

Claims

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

2. The circulating multi-fluidized state aeration device according to claim 1, wherein The number of aerators is two-stage or more than two-stage aerators.

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

4. The circulating multi-fluid state aeration device according to claim 3, characterized in that, The aeration area (4) includes a bottom plate (12), an aeration membrane (13) and fasteners. The aeration membrane (13) is arranged on the bottom plate (12) through the fasteners.

5. The circulating multi-fluidized-bed aeration device according to claim 4, wherein, The fasteners include a pressing strip (6) and bolts (7). The pressing strip (6) is arranged along the edge of the aeration membrane and the pressing strip (6) is installed on the bottom plate (12) through the bolts (7).

6. The circulating multi-fluid state aeration device according to claim 3, characterized in that, The number of aerators includes 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 arranged inside the secondary aerator (2). There is a gap between the primary aerator (1) and the secondary aerator (2).

7. The circulating multi-fluid state aeration device according to claim 3, characterized in that, The number of aerators includes a number of aerators with the same or different diameters. The number of aerators is spaced apart through the hollow areas.

8. The circulating multi-fluidized-bed aeration device according to claim 4, characterized in that The air distribution connecting device (5) includes an air inlet connecting piece (8) and an air distribution connecting piece (9). The first end of the air inlet connecting piece (8) is used to connect with the air distribution connecting piece (9), and the second end of the air inlet connecting piece (8) is used to connect with a gas supply device; a number of ventilation connecting rods (10) are arranged on the air distribution connecting piece (9), and the ventilation connecting rods (10) are used to connect with the bottom plate of the aerator.

9. The circulating multi-fluidized-bed aeration device according to claim 8, wherein, Both the air inlet connecting piece (8) and the air distribution connecting piece (9) are of an internally hollow structure.

10. A sewage treatment device, characterized in that, It includes the cyclic multi-flow state aeration device according to any one of claims 1-9.

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