An aeration system for a sewage treatment tank

Abstract

The utility model relates to an aeration system of sewage treatment, including setting up in the aeration zone's aeration pipe, still including the air supply fan that is linked with aeration pipe through the air pipe, the aeration system still includes control mechanism and the dissolved oxygen meter that sets up in the aeration zone when using, and the air pipe is connected with the gas release pipe, and the gas release pipe electric valve is arranged on the gas release pipe, and the dissolved oxygen meter is connected with control mechanism sampling, and control mechanism is connected with the fan and the gas release pipe electric valve control. The utility model solves the technical problem that when the air supply fan runs in the minimum frequency state in the prior art, the dissolved oxygen content of aeration zone is still too big.

Description

Technical Field

[0001] This utility model relates to wastewater treatment equipment in the field of environmental protection, and particularly to an aeration system for a wastewater treatment pond. Background Technology

[0002] Wastewater treatment systems are complex, and the biological treatment unit is a particularly important part of it. Modern wastewater treatment ponds include an aeration system, which is the core component of the biological treatment unit.

[0003] The aeration system includes a suspended blower, which aerates the aeration zone through aeration pipes to increase dissolved oxygen. When the dissolved oxygen content is appropriate, the sludge in the aeration zone is in optimal condition, with a large number of microorganisms, obvious sludge flocs, large flocs, many dominant species, a distinct earthy smell, reasonable sludge settling speed, and good wastewater treatment effect.

[0004] When the dissolved oxygen in the aeration zone is too high, it will cause sludge bulking, turbid effluent, and poor biological treatment effect. Therefore, controlling the dissolved oxygen content in the aeration zone is particularly important, especially when the blower is running at its lowest frequency and the blower air volume is too high. In such cases, it is especially important to reduce the dissolved oxygen in the aeration zone.

[0005] In existing technologies, there are generally two methods to solve the problem of excessive air volume from fans: 1. Replacing the fan; 2. Adjusting the fan frequency. The first method, replacing the fan, can solve the problem of excessive air volume, but the cost of replacing the fan is high, and reducing the minimum frequency air volume of the fan will also affect the maximum air volume output of the fan; the second method cannot solve the problem of excessive air volume even when the fan is running at its minimum frequency. Utility Model Content

[0006] The purpose of this invention is to provide an aeration system for a sewage treatment pond to solve the technical problem in the prior art that the dissolved oxygen content in the aeration zone is still too high when the blower is running at its lowest frequency.

[0007] To solve the above-mentioned technical problems, the technical solution of the aeration system for a sewage treatment pond in this utility model is as follows:

[0008] An aeration system for wastewater treatment includes an aeration pipe installed in an aeration zone, a blower connected to the aeration pipe via a duct, a control mechanism, and a dissolved oxygen meter installed in the aeration zone during use. An vent pipe is connected in parallel to the duct, and an electric vent valve is installed on the vent pipe. The dissolved oxygen meter is connected to the control mechanism for sampling, and the control mechanism is connected to the blower and the electric vent valve for control.

[0009] Furthermore, the venting pipe electric valve is an electric ball valve.

[0010] Furthermore, the control mechanism is a DOCS control mechanism.

[0011] Furthermore, an electric valve is installed on the duct downstream of the vent pipe, and a control mechanism is connected to the electric valve.

[0012] Furthermore, the vent pipe includes a main vent pipe connected to the air duct and multiple branch vent pipes connected in parallel to the main vent pipe. Each branch vent pipe is equipped with a power valve for the vent pipe, and the valve diameter of the power valve for the vent pipe on each branch vent pipe is different.

[0013] Furthermore, a makeup air fan is connected to the main venting pipe or at least one venting branch pipe, and a makeup air electric valve is installed at the makeup air fan.

[0014] Furthermore, each venting branch pipe is arranged in parallel from near to far along the direction away from the duct. Relative to the duct, the valve diameter of the electric valve on each venting branch pipe decreases sequentially from near to far.

[0015] The beneficial effects of this utility model are as follows: When the aeration system is in normal use, the blower sends air to the aeration pipe through the air duct, and the aeration pipe aerates the aeration zone. The dissolved oxygen meter detects the dissolved oxygen content in the aeration zone, and this information is fed back to the control mechanism. The control mechanism adjusts the air supply of the blower according to the dissolved oxygen content in the aeration zone. For example, when the dissolved oxygen content is lower than the set value, the air supply of the blower is increased; when the dissolved oxygen content is higher than the set value, the air supply of the blower is decreased. When the blower is running at the lowest frequency, if the dissolved oxygen content is still higher than the set value, the control mechanism will control the corresponding vent pipe electric valve to open, thereby further reducing the aeration amount from the aeration pipe to the aeration zone. This solves the technical problem that the dissolved oxygen content in the aeration zone is still too high when the blower is running at the lowest frequency.

[0016] Furthermore, since the valve diameters of the electric valves on each venting branch pipe are different, one electric valve can be opened to achieve different venting volumes, or at least two electric valves can be opened simultaneously to further adjust the venting volumes.

[0017] Furthermore, when the dissolved oxygen content still does not meet the requirements even when the blower is operating at the highest frequency, the make-up air electric valve can be opened, and the make-up air blower can supply air into the air duct, thereby increasing the aeration rate in the aeration zone. Attached Figure Description

[0018] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding portions, wherein:

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of an aeration system for a sewage treatment pond according to the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the connection between the aeration pipe and the aeration tank;

[0021] Figure 3 This is a schematic diagram of the control mechanism of the present invention, along with the control principle of the dissolved oxygen meter, the air supply fan, and the electric valve of the venting pipe.

[0022] 1. Dissolved oxygen meter; 2. Aeration zone; 3. Wastewater treatment tank; 4. Aeration pipe; 5. Air duct; 6. Air supply fan; 7. Control mechanism; 8. Air duct electric valve; 9. Main vent pipe; 10. Branch vent pipe; 11. Make-up air fan; 12. Make-up air electric valve; 13. Vent pipe electric valve. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings show preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0024] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention.

[0025] An example of an implementation of an aeration system for a wastewater treatment pond in this utility model. Figures 1-2 As shown:

[0026] The system includes an aeration pipe 4 connected to the aeration pipe 4 via an air duct 5 and a blower 6. When in use, the aeration pipe 4 is placed in the aeration zone of the wastewater treatment tank. In this embodiment, the blower 6 is a suspended blower. There are multiple aeration pipes, each extending in the front-to-back direction. The aeration pipes are arranged side by side at intervals in the left-to-right direction. The air duct 5 is connected to the middle of each aeration pipe. The blower 6, the aeration pipe 4, and the connection between the blower 6 and the aeration pipe 4 are existing technologies and will not be described in detail here.

[0027] The aeration system also includes a control mechanism and a dissolved oxygen meter 1 installed in the aeration zone 2 during use. In this embodiment, the control mechanism 7 is a DOCS system. The DOCS system is a distributed control system that can realize centralized monitoring and control of various devices, sensors and actuators. Its specific structure belongs to the prior art and will not be described in detail here.

[0028] A vent pipe is connected in parallel to the air duct 5, and a vent pipe electric valve 13 is installed on the vent pipe. The dissolved oxygen meter 1 is connected to the control mechanism 7 for sampling, and the control mechanism is connected to the air supply fan 6 and the vent pipe electric valve for control. In this embodiment, the vent pipe electric valve 13 is an electric ball valve.

[0029] An electric valve 8 is installed on the duct downstream of the vent pipe, and the control mechanism is connected to the electric valve 8.

[0030] In this embodiment, the vent pipe includes a main vent pipe 9 connected to the air duct and a plurality of vent branch pipes 10 connected in parallel to the main vent pipe. Each vent branch pipe 10 is provided with the aforementioned vent pipe electric valve 13. The valve diameter of the vent pipe electric valve on each vent branch pipe is different. Therefore, when the corresponding vent pipe electric valve on each vent branch is opened, different venting volumes can be adjusted.

[0031] Each vent branch pipe 10 is arranged in parallel from near to far along the direction away from the duct 5. Relative to the duct, the valve diameter of the electric vent valve on each vent branch pipe 10 decreases sequentially from near to far. This is because the pressure loss is greater for the vent branch pipe farther from the duct, and using the electric vent valve with the smallest valve diameter on the vent branch pipe is beneficial for adjusting the minimum airflow range.

[0032] A makeup air fan 11 is connected to the venting main pipe, and a makeup air electric valve 12 is installed at the makeup air fan 11. The control mechanism 7 is connected to the makeup air fan 11 and the makeup air electric valve 12.

[0033] During use, the dissolved oxygen meter 1 monitors the dissolved oxygen level in the aeration zone. When the dissolved oxygen level is lower than the set value, the make-up air electric valve 12 and the electric valves 13 of each vent pipe are closed, and the air supply fan 11 increases the air supply volume. When the air supply fan 6 is operating at the highest frequency, if the dissolved oxygen level still cannot reach the set value, the make-up air electric valve 12 is opened, and the make-up air fan 11 and the air supply fan 6 work simultaneously to further increase the aeration volume of the aeration pipe 4. When the dissolved oxygen level is higher than the set value, the make-up air electric valve 12 and the electric valves 13 of each vent pipe are closed, and the air supply fan reduces the air supply volume. When the air supply fan is operating at the lowest frequency, if the dissolved oxygen level is still higher than the set value, the corresponding air pipe electric valve can be opened as needed to release air and reduce the aeration volume of the aeration pipe to the aeration zone. By opening the air pipe electric valves of different vent branches or by combining the air pipe electric valves of different vent branches, different air release volume adjustments can be achieved.

[0034] This invention eliminates the need to replace the suspension blower, reducing equipment investment and construction intensity; it enables precise control of dissolved oxygen in the biological system, requiring no manual operation and achieving full automation, thus reducing errors caused by human factors; and through precise control of dissolved oxygen in the aeration zone, it reduces problems such as sludge bulking and poor effluent quality in the biological system.

[0035] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "joined" should be interpreted broadly. For example, the term "joined" can refer to 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 refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0037] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An aeration system for wastewater treatment, comprising an aeration pipe disposed in an aeration zone, and a blower connected to the aeration pipe via a duct, characterized in that: The aeration system also includes a control mechanism and a dissolved oxygen meter installed in the aeration zone during use. An air vent pipe is connected in parallel to the air duct, and an electric valve for the air vent pipe is installed on the air vent pipe. The dissolved oxygen meter is connected to the control mechanism for sampling, and the control mechanism is connected to the fan and the electric valve for the air vent pipe for control.

2. The aeration system according to claim 1, characterized in that: The venting pipe electric valve is an electric ball valve.

3. The aeration system according to claim 1, characterized in that: The control mechanism is the DOCS control mechanism.

4. The aeration system according to claim 1, characterized in that: An electric valve is installed on the duct downstream of the vent pipe, and a control mechanism is connected to the electric valve.

5. The aeration system according to any one of claims 1 to 4, characterized in that: The vent pipe includes a main vent pipe connected to the air duct and multiple branch vent pipes connected in parallel to the main vent pipe. Each branch vent pipe is equipped with a power valve for the vent pipe, and the valve diameter of the power valve on each branch vent pipe is different.

6. The aeration system according to claim 5, characterized in that: A makeup air fan is connected to the venting main pipe or at least one venting branch pipe, and a makeup air electric valve is installed at the makeup air fan.

7. The aeration system according to claim 5, characterized in that: Each venting branch pipe is arranged in parallel from near to far along the direction away from the duct. Relative to the duct, the valve diameter of the electric valve on each venting branch pipe decreases sequentially from near to far.

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