Self-adjusting micro negative pressure suction device for sewage pool

Abstract

The utility model discloses a sewage pool self-adjusting micro negative pressure suction device which is characterized in that two groups of waste gas collecting pipes are arranged on the upper surface of a capping plate in a penetrating manner, the upper ends of the waste gas collecting pipes are connected with connecting pipes, one end of each connecting pipe is connected with a tail gas fan, and the gas outlet end of each tail gas fan is connected with the outside through a pipeline; a second micro-negative-pressure suction device and a first micro-negative-pressure suction device are respectively arranged on one side of the two groups of waste gas collecting pipes above the capping plate from left to right, and each of the first micro-negative-pressure suction device and the second micro-negative-pressure suction device comprises a collecting vertical pipe, a pressure regulating valve and a pressure transmitter. The utility model relates to the technical field of waste gas collection of sewage pools. According to the self-adjusting micro-negative-pressure suction device for the sewage pool, the interior of the sewage pool is divided into a plurality of areas, and the self-adjusting micro-negative-pressure suction device is arranged between every two areas, so that waste gas is not dissipated, and a large amount of organic matters are not volatilized.

Description

Technical Field

[0001] This utility model relates to the field of waste gas collection technology for sewage tanks, specifically a self-regulating micro-negative pressure suction device for sewage tanks. Background Technology

[0002] Wastewater treatment plants in industries such as petrochemicals, refining, and fine chemicals often contain odorous gases and VOCs in their biochemical front-end (including biochemical wastewater tanks). These gases are generally required to be collected in a closed system. Currently, in order to prevent the odorous gases from escaping and causing environmental pollution, the common practice is to cover the tank and apply sealant or gaskets between the tank and the cover (fiberglass cover or inverted membrane cover) to completely isolate the wastewater tank from the atmosphere.

[0003] This approach suffers from poor control of the micro-negative pressure, resulting in the extraction of a large amount of VOCs and leading to high concentrations of organic matter in the emitted waste gas. If the sealing cover is not airtight, the micro-negative pressure state will not be formed, and the waste gas will escape from the wastewater tank. Controlling the micro-negative pressure state inside the cover and ensuring a certain number of air exchanges for effective waste gas collection is a challenge in wastewater treatment plant waste gas collection. Therefore, those skilled in the art have provided a self-regulating micro-negative pressure suction device for wastewater tanks to solve the problems mentioned in the background art. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a self-regulating micro-negative pressure suction device for sewage tanks, thereby solving the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-regulating micro-negative pressure suction device for a wastewater tank, comprising a wastewater tank and a cover plate disposed on the upper surface of the wastewater tank. Two sets of exhaust gas collection pipes are disposed through the upper surface of the cover plate. The upper end of each exhaust gas collection pipe is connected to a connecting pipe, and one end of the connecting pipe is connected to a tail gas fan. The outlet of the tail gas fan is connected to the outside through a pipe. A second micro-negative pressure suction device and a first micro-negative pressure suction device are respectively disposed on one side of the two sets of exhaust gas collection pipes from left to right above the cover plate. Both the first and second micro-negative pressure suction devices include a collection vertical pipe, a pressure regulating valve, and a pressure transmitter.

[0006] Preferably, the inlet end of the pressure regulating valve is connected to one end of the exhaust gas collection pipe, and the outlet end of the pressure regulating valve is connected to the other end of the exhaust gas collection pipe.

[0007] Preferably, one end of the pressure transmitter is connected to the collection riser, and the collection riser is in communication with the interior of the wastewater tank.

[0008] Preferably, the upper surface of the cover plate is also provided with ventilation holes.

[0009] Preferably, one end of the pressure transmitter is also connected to a pressure display for pressure values.

[0010] Preferably, the pressure regulating valve is interlocked with the pressure transmitter.

[0011] Beneficial effects

[0012] This invention provides a self-regulating micro-negative pressure suction device for sewage tanks. Compared with the prior art, it has the following advantages:

[0013] This self-regulating micro-negative pressure suction device for sewage tanks divides the interior of the sewage tank into multiple zones and sets up a self-regulating micro-negative pressure suction device between two zones to achieve a pressure of -50Pa to -100Pa inside the sewage tank, which prevents both the escape of waste gas and the large-scale volatilization of organic matter. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a self-regulating micro-negative pressure suction device for a sewage tank.

[0015] Figure 2 This is a schematic diagram of the structure of a micro-negative pressure suction device in a self-regulating micro-negative pressure suction device for sewage tanks.

[0016] In the diagram: 1. Wastewater tank; 2. Ventilation hole; 3. Exhaust gas fan; 4. Exhaust gas collection pipe; 5. First micro-negative pressure suction device; 6. Second micro-negative pressure suction device; 7. Cover plate; 8. Connecting pipe; 9. Pressure transmitter; 10. Pressure regulating valve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-2 This utility model provides a technical solution: a self-regulating micro-negative pressure suction device for a sewage tank, including a wastewater tank 1 and a cover plate 7 installed on the upper surface of the wastewater tank 1. Two sets of exhaust gas collection pipes 4 are installed through the upper surface of the cover plate 7. The upper end of the exhaust gas collection pipe 4 is connected to a connecting pipe 8. One end of the connecting pipe 8 is connected to a tail gas fan 3. The exhaust gas fan 3 is connected to the outside through a pipe. A second micro-negative pressure suction device 6 and a first micro-negative pressure suction device 5 are respectively installed on one side of the two sets of exhaust gas collection pipes 4 from left to right above the cover plate 7. The first micro-negative pressure suction device 5 and the second micro-negative pressure suction device 6 both include a collection vertical pipe, a pressure regulating valve 10 and a pressure transmitter 9.

[0019] Specifically in this embodiment, the inlet end of the pressure regulating valve 10 is connected to one end of the exhaust gas collection pipe 4, and the outlet end of the pressure regulating valve 10 is connected to the other end of the exhaust gas collection pipe 4.

[0020] In this specific embodiment, one end of the pressure transmitter 9 is connected to the collection vertical pipe, and the collection vertical pipe is connected to the interior of the wastewater tank 1.

[0021] Specifically, in this embodiment, the upper surface of the cover plate 7 is also provided with ventilation holes 2.

[0022] Specifically in this embodiment, one end of the pressure transmitter 9 is also connected to a pressure display for pressure values.

[0023] Specifically in this embodiment, the pressure regulating valve 10 is interlocked with the pressure transmitter 9.

[0024] During operation (or use), the self-regulating micro-negative pressure suction device for sewage tanks is effective. For large sewage tanks, setting up a single gas collection port often fails to collect gas effectively. Based on the waste gas volume calculation, the sewage tank is divided into multiple areas, and a self-regulating micro-negative pressure suction device is set between two areas to achieve a pressure of -50Pa to -100Pa in the sewage tank, which prevents waste gas from escaping and prevents a large amount of organic matter from volatilizing.

[0025] Example: A wastewater treatment plant has a large wastewater pool 1. After being covered by a cover plate 7, the waste gas is discharged through a waste gas collection pipe 4 and a tail gas fan 3 to the subsequent waste gas treatment facilities. This wastewater pool 1 is relatively large, estimated at 500m³. 3 The collection area is divided into units of / h. One or two sets of micro-negative pressure suction devices are set between the two areas, for a total of two sets of micro-negative pressure suction devices: the first micro-negative pressure suction device 5 and the second micro-negative pressure suction device 6. Each micro-negative pressure suction device is equipped with a collection riser, a pressure regulating valve 10 and a pressure transmitter 9 to achieve micro-negative pressure control in different areas. In the first micro-negative pressure suction device 5 and the second micro-negative pressure suction device 6, the pressure regulating valve 10 and the pressure transmitter 9 are interlocked to achieve a pressure of -50Pa to -100Pa in the sewage tank in each area, so as to achieve effective collection of waste gas.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A self-regulating micro-negative pressure suction device for a wastewater tank, comprising a wastewater tank (1) and a cover plate (7) disposed on the upper surface of the wastewater tank (1), characterized in that: Two sets of exhaust gas collection pipes (4) are provided through the upper surface of the cover plate (7). The upper end of the exhaust gas collection pipe (4) is connected to a connecting pipe (8). One end of the connecting pipe (8) is connected to a tail gas fan (3). The exhaust gas fan (3) is connected to the outside through a pipe. A second micro-negative pressure suction device (6) and a first micro-negative pressure suction device (5) are respectively provided on one side of the two sets of exhaust gas collection pipes (4) from left to right above the cover plate (7). The first micro-negative pressure suction device (5) and the second micro-negative pressure suction device (6) both include a collection vertical pipe, a pressure regulating valve (10) and a pressure transmitter (9).

2. The sewage tank self-regulating micro-negative pressure suction device according to claim 1, characterized in that: The inlet of the pressure regulating valve (10) is connected to one end of the exhaust gas collection pipe (4), and the outlet of the pressure regulating valve (10) is connected to the other end of the exhaust gas collection pipe (4).

3. The sewage tank self-regulating micro-negative pressure suction device according to claim 1, characterized in that: One end of the pressure transmitter (9) is connected to the collection vertical pipe, which is connected to the interior of the wastewater tank (1).

4. The sewage tank self-regulating micro-negative pressure suction device according to claim 1, characterized in that: The upper surface of the cover plate (7) is also provided with ventilation holes (2).

5. The sewage tank self-regulating micro-negative pressure suction device according to claim 1, characterized in that: One end of the pressure transmitter (9) is also connected to a pressure display for pressure values.

6. The sewage tank self-regulating micro-negative pressure suction device according to claim 1, characterized in that: The pressure regulating valve (10) is interlocked with the pressure transmitter (9).

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