Aeration system of aeration tank

Abstract

The utility model discloses an aeration system of an aeration tank, which comprises a biochemical reaction tank and an aeration system, the biochemical reaction tank is provided with a water inlet pipe and a water outlet pipe, the aeration system comprises a control cabinet, an aeration pipeline and an aeration fan, and the control cabinet controls the aeration fan to convey gas to the aeration pipeline. A temperature sensor a which is in electric signal connection with the control cabinet is arranged in the biochemical reaction tank, an air heater and a temperature sensor b are arranged on the aeration pipeline, and air is heated by the temperature sensor a and fed into the biochemical reaction tank for aeration. The aeration system of the aeration tank takes gas as a thermal medium, carries heat in a heating manner, is driven into the biochemical reaction tank in cooperation with a pipeline of an original aeration system, controls the temperature of sewage in the biochemical reaction tank, and can effectively avoid the influence of the temperature on the activity of microorganisms and maintain the aeration efficiency in winter, especially in the northern environment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an aeration system for an aeration tank. Background Technology

[0002] Aeration tanks utilize the activated sludge process for wastewater treatment. The tank provides a certain retention time for the wastewater, meeting the oxygen requirements of aerobic microorganisms and ensuring sufficient mixing between the wastewater and activated sludge. An aeration tank mainly consists of three parts: the tank body, the aeration system, and the inlet and outlet. The tank body is generally constructed of reinforced concrete and has shapes such as rectangular, square, and circular. Aeration refers to the artificial introduction of air into the biological aeration tank through appropriate equipment to achieve the desired purpose. Aeration not only allows the liquid in the tank to come into contact with air and become oxygenated, but also accelerates the transfer of oxygen from the air to the liquid due to the agitation of the liquid, thus achieving the purpose of oxygenation.

[0003] Although the aeration tank is located inside the plant, its open top causes rapid temperature loss during sedimentation and other processes, resulting in a drop in tank water temperature. The optimal temperature range for aerobic activated sludge microorganisms is 15-30℃. When the temperature is below 10℃ or above 35℃, the activity of microorganisms will be affected. At temperatures above 40℃ or below 5℃, microorganisms may even completely cease activity. Therefore, controlling the temperature within the aeration tank within a certain range is a key technology for aeration. Utility Model Content

[0004] The purpose of this invention is to provide an aeration system for an aeration tank to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An aeration system for an aeration tank includes a biochemical reaction tank and an aeration system. The biochemical reaction tank is equipped with an inlet pipe and an outlet pipe. The aeration system includes a control cabinet, aeration pipelines, and an aeration fan. The control cabinet controls the aeration fan to deliver gas to the aeration pipelines. A temperature sensor a is installed in the biochemical reaction tank and is electrically connected to the control cabinet. An air heater and a temperature sensor b are installed on the aeration pipelines. Air is heated by the temperature sensor a and then sent into the biochemical reaction tank for aeration.

[0007] As a further improvement of this utility model: a gas recovery pipeline is provided around the biochemical reaction tank, and the other end of the gas recovery pipeline is connected to the air inlet of the aeration blower.

[0008] As a further improvement of this utility model: a temperature sensor c is installed on the water inlet pipe, and both the temperature sensor b and the temperature sensor c are electrically connected to the control cabinet.

[0009] As a further improvement of this utility model: the water inlet pipe is equipped with a flow control valve controlled by a control cabinet, and the control cabinet controls the opening degree of the flow control valve through a water level sensor installed inside the biochemical reaction tank.

[0010] As a further improvement of this utility model, the aeration pipeline is also equipped with a pressure sensor and a flow sensor controlled by a control cabinet. The control cabinet controls the operating power of the aeration blower by monitoring the values ​​of the pressure sensor and the flow sensor.

[0011] As a further improvement of this utility model, the biochemical reaction tank is also equipped with a sludge concentration sensor and a dissolved oxygen sensor controlled by a control cabinet.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The aeration system of this aeration tank uses gas as a heat medium to carry heat through heating. It is then pumped into the biochemical reaction tank through the pipeline of the original aeration system to control the temperature of the sewage. In winter, especially in northern environments, it can effectively avoid the impact of temperature on the activity of microorganisms and maintain aeration efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the aeration system of an aeration tank.

[0015] In the diagram: 1. Biochemical reaction tank; 2. Inlet pipe; 3. Sludge concentration sensor; 4. Temperature sensor a; 5. Dissolved oxygen sensor; 6. Water level sensor; 7. Control cabinet; 8. Temperature sensor b; 9. Flow sensor; 10. Pressure sensor; 11. Aeration pipeline; 12. Air heater; 13. Aeration blower; 14. Air inlet; 15. Gas recovery pipeline; 16. Temperature sensor c; 17. Flow control valve. Detailed Implementation

[0016] Please see Figure 1In this embodiment of the present invention, an aeration system for an aeration tank includes a biochemical reaction tank 1 and an aeration system. The biochemical reaction tank 1 is equipped with an inlet pipe 2 and a drain pipe. The aeration system includes a control cabinet 7, an aeration pipeline 11, and an aeration blower 13. The control cabinet 7 controls the aeration blower 13 to deliver gas to the aeration pipeline 11. A temperature sensor a4 electrically connected to the control cabinet 7 is installed in the biochemical reaction tank 1. An air heater 12 and a temperature sensor b8 are installed on the aeration pipeline 11. The air is heated by the temperature sensor a4 and sent into the biochemical reaction tank 1 for aeration. By heating the aeration gas, the gas temperature reaches or exceeds 30°C. The gas is evenly delivered into the biochemical reaction tank 1 through the aeration pipeline 11 and the aeration disc of the aeration system. The gas forms bubbles in the biochemical reaction tank 1 and floats to the surface. During this process, the gas exchanges heat with the surrounding sewage, raising its temperature between 15-30°C. This prevents the water temperature from being too low during the treatment process, which would affect the activity of microorganisms and reduce the sewage treatment efficiency.

[0017] In a preferred embodiment, a gas recovery pipeline 15 is provided around the biochemical reaction tank 1. The other end of the gas recovery pipeline 15 is connected to the air inlet 14 of the aeration blower 13. By recovering the gas with a certain temperature near the biochemical reaction tank 1, the working intensity of the air heater 12 is reduced, thereby achieving the purpose of heat recovery and energy consumption reduction. A thin film or sealing cover can be provided on one side of the top of the biochemical reaction tank 1 to reduce heat loss and heat gas dissipation, and improve heat recovery efficiency.

[0018] In a preferred embodiment, a temperature sensor c16 is installed on the inlet pipe 2. Both the temperature sensor b8 and the temperature sensor c16 are electrically connected to the control cabinet 7. The control cabinet 7 collects the temperature of the sewage entering the biochemical reaction tank 1 through the temperature sensor c16, and changes the heating efficiency of the air heater 12 so that the output temperature can exchange heat with the sewage after entering the biochemical reaction tank 1, thereby improving the accuracy of temperature control.

[0019] In a preferred embodiment, a flow control valve 17 controlled by a control cabinet 7 is installed on the inlet pipe 2. The control cabinet 7 controls the opening of the flow control valve 17 through a water level sensor 6 installed inside the biochemical reaction tank 1. After the flow rate changes, the sewage circulation speed in the biochemical reaction tank 1 decreases, so the heating efficiency of the air heater 12 needs to be adjusted accordingly.

[0020] In a preferred embodiment, the aeration pipeline 11 is also equipped with a pressure sensor 10 and a flow sensor 9 controlled by the control cabinet 7. The control cabinet 7 controls the operating power of the aeration blower 13 by monitoring the values ​​of the pressure sensor 10 and the flow sensor 9. In order to maintain the aeration pressure and aeration volume, the pressure will be affected during the process of reducing the gas temperature. Therefore, the operating power of the aeration blower 13 needs to be increased accordingly so as not to affect the aeration efficiency.

[0021] In a preferred embodiment, the biochemical reaction tank 1 is further equipped with a sludge concentration sensor 3 and a dissolved oxygen sensor 5 controlled by a control cabinet 7 to further monitor the aeration efficiency and adjust the aeration rate.

[0022] It should be noted that all the above embodiments belong to the same utility model concept, and the descriptions of each embodiment have different focuses. Where the description in a particular embodiment is not detailed, please refer to the description in other embodiments.

[0023] The embodiments described above merely illustrate the implementation 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 these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An aeration system for an aeration tank, comprising a biochemical reaction tank (1) and an aeration system, wherein the biochemical reaction tank (1) is provided with an inlet pipe (2) and an outlet pipe, and the aeration system comprises a control cabinet (7), an aeration pipeline (11), and an aeration blower (13), wherein the control cabinet (7) controls the aeration blower (13) to deliver gas to the aeration pipeline (11), characterized in that, The biochemical reaction tank (1) is equipped with a temperature sensor a (4) that is electrically connected to the control cabinet (7). An air heater (12) and a temperature sensor b (8) are installed on the aeration pipeline (11). The air is heated by the temperature sensor a (4) and sent into the biochemical reaction tank (1) for aeration.

2. The aeration system for an aeration tank according to claim 1, characterized in that, The biochemical reaction tank (1) is surrounded by a gas recovery pipeline (15), and the other end of the gas recovery pipeline (15) is connected to the air inlet (14) of the aeration blower (13).

3. The aeration system for an aeration tank according to claim 1 or 2, characterized in that, Temperature sensor c (16) is installed on the water inlet pipe (2). Temperature sensor b (8) and temperature sensor c (16) are both electrically connected to the control cabinet (7).

4. The aeration system for an aeration tank according to claim 3, characterized in that, The inlet pipe (2) is equipped with a flow control valve (17) controlled by the control cabinet (7). The control cabinet (7) controls the opening degree of the flow control valve (17) through the water level sensor (6) installed inside the biochemical reaction tank (1).

5. The aeration system for an aeration tank according to claim 1, characterized in that, The aeration pipeline (11) is also equipped with a pressure sensor (10) and a flow sensor (9) controlled by the control cabinet (7). The control cabinet (7) controls the operating power of the aeration blower (13) by monitoring the values ​​of the pressure sensor (10) and the flow sensor (9).

6. The aeration system for an aeration tank according to claim 1, characterized in that, The biochemical reaction tank (1) is also equipped with a sludge concentration sensor (3) and a dissolved oxygen sensor (5) controlled by a control cabinet (7).

Images