Urban sewage treatment tank

Abstract

The utility model discloses an urban sewage treatment tank and belongs to the technical field of sewage treatment tanks. According to the urban sewage treatment tank, the upper end of a sedimentation tank body is fixedly provided with an annular purification mechanism surrounding the sedimentation tank body in all directions, four exhaust fans forming negative pressure suction are installed on the surface of the outer side of the purification mechanism, and a plurality of exhaust windows for purifying gas are formed in the surface of the inner ring of the purification mechanism; and a first air duct and a second air duct which can be used for purifying gas are arranged in the purification mechanism. According to the sewage treatment tank, the problem that an existing sewage treatment tank pollutes the surrounding environment is solved, when harmful gas is generated in the sedimentation tank body, the exhaust fan is immediately started to suck the gas into the purification mechanism, the gas firstly passes through the first filter screen to intercept large-particle impurities, then passes through the second filter screen to remove fine particles, and the gas is purified. Finally, peculiar smell and harmful substances are thoroughly adsorbed through a third filter screen, and it is ensured that exhausted air is clean and reaches the standard.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment pond technology, specifically to an urban sewage treatment pond. Background Technology

[0002] Urban sewage treatment ponds are used to collect, treat, and purify urban domestic sewage and industrial wastewater to meet discharge standards or reuse requirements. However, during the use of these ponds, harmful gases can continuously damage the surrounding environment.

[0003] The reason for the continuous damage to the surrounding environment is that sedimentation sewage treatment ponds have a long sewage treatment time. During this period, harmful gases in the sewage will continuously volatilize into the surrounding environment. For example, anaerobic sedimentation ponds, due to the long sewage retention time (usually ≥4 hours) and the presence of an oxygen-deficient environment, will continuously release harmful gases such as hydrogen sulfide (H2S) and ammonia (NH3), thereby affecting the surrounding environment and causing great damage to ecological and environmental protection.

[0004] To address this, we propose an urban wastewater treatment pond that, through preventing the volatilization of harmful gases and implementing purification treatment, can effectively reduce the damage of harmful gases to the surrounding environment. Utility Model Content

[0005] The purpose of this invention is to provide an urban sewage treatment pond that achieves efficient, energy-saving, and easy-to-maintain purification of harmful gases through a combination of multi-stage filtration, activated carbon adsorption, and negative pressure suction, thereby preventing harmful gases from harming the surrounding environment.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a municipal sewage treatment pond, including a sedimentation tank body, wherein an annular purification mechanism is fixedly installed at the upper end of the sedimentation tank body, and four exhaust fans that form negative pressure suction are installed on the outer surface of the purification mechanism. Several exhaust windows for purifying gas are opened on the inner surface of the purification mechanism, and a first air duct and a second air duct are provided inside the purification mechanism for purifying the gas.

[0007] As a preferred technical solution, a number of fasteners are fixedly installed on the outer surface of the sedimentation tank, and the upper end of the fasteners is fixedly connected to the lower surface of the purification mechanism.

[0008] As a preferred technical solution, the exhaust fan is open at both ends, with the front end communicating with the interior of the purification mechanism and the rear end communicating with the external environment.

[0009] As a preferred technical solution, a third filter screen is installed at the connection between the exhaust fan and the purification mechanism.

[0010] As a preferred technical solution, a first filter screen is installed inside the air extraction window.

[0011] As a preferred technical solution, an isolation barrier is fixedly installed in the middle of the purification mechanism, and a second filter screen is installed inside the isolation barrier.

[0012] As a preferred technical solution, the isolation barrier divides the internal space of the purification unit into a first air duct and a second air duct.

[0013] As a preferred technical solution, an appropriate amount of activated carbon is placed inside the first air duct.

[0014] As a preferred technical solution, a water level ring for monitoring the water level is provided on the upper side of the inner wall of the sedimentation tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) The urban sewage treatment pond of this utility model can effectively remove harmful gases such as H2S, NH3, and VOCs volatilized from the sewage pond through the synergistic effect of a three-stage filtration system, and significantly reduce the pollution of the surrounding environment by harmful gases.

[0017] (2) In a city sewage treatment pond of the present invention, the first filter screen intercepts large suspended particles to prevent subsequent filter screens from clogging.

[0018] (3) A city sewage treatment pond of the present invention, wherein the second filter screen adsorbs aerosols and some gaseous pollutants.

[0019] (4) The urban sewage treatment pond of this utility model has a third filter screen for deep purification of residual harmful gases. The three-stage filtration has a clear division of labor, which reduces the load on the single-stage filter material and extends the overall service life. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the entire utility model;

[0021] Figure 2 This is a schematic diagram of the entire utility model from another angle;

[0022] Figure 3 This is a schematic diagram of the layout of the purification mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the isolation barrier structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the exhaust fan structure of this utility model.

[0025] In the diagram: 1. Sedimentation tank body; 11. Water level ring; 12. Fixture; 2. Purification mechanism; 21. Exhaust fan; 211. Third filter screen; 22. Exhaust window; 221. First filter screen; 23. Isolation railing; 231. Second filter screen; 24. First air duct; 25. Second air duct. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-5 A type of urban sewage treatment pond includes a sedimentation tank 1. A ring-shaped purification mechanism 2 is fixedly installed at the upper end of the sedimentation tank 1, surrounding the sedimentation tank 1 in all directions. Four exhaust fans 21 that form negative pressure suction are installed on the outer surface of the purification mechanism 2. Several air extraction windows 22 for purifying gas are opened on the inner surface of the purification mechanism 2. The purification mechanism 2 is equipped with a first air duct 24 and a second air duct 25 for purifying gas. In use, the sewage treatment pond purification system adopts a three-stage filtration technology. When harmful gas is generated in the sedimentation tank 1, the exhaust fans 21 are immediately activated to draw the gas into the purification mechanism 2. The gas first passes through the first filter screen 221 to intercept large particulate impurities, then passes through the second filter screen 231 to remove fine particles, and finally passes through the third filter screen 211 to completely adsorb odors and harmful substances, ensuring that the discharged air is clean and meets the standards. The entire purification process is highly efficient and stable, and can effectively prevent harmful gas from leaking and polluting the environment.

[0028] Furthermore, several fasteners 12 are fixedly installed on the outer surface of the sedimentation tank 1, and the upper end of the fasteners 12 is fixedly connected to the lower surface of the purification mechanism 2. In use, the fasteners 12 are used to reinforce the purification mechanism 2 and ensure its stability.

[0029] Furthermore, the exhaust fan 21 is open at both ends, with its front end communicating with the interior of the purification mechanism 2 and its rear end communicating with the external environment. When in use, when the sedimentation tank 1 is treating sewage, harmful gases slowly evaporate upwards. At this time, the exhaust fan 21 can be started. The exhaust fan 21 forms an exhaust airflow at the upper end of the sedimentation tank 1, drawing the harmful gases into the purification mechanism 2 for purification treatment before they evaporate to the external environment.

[0030] Furthermore, a third filter 211 is installed at the connection between the exhaust fan 21 and the purification mechanism 2. In use, the gas is purified and filtered by the second filter 231 and then drawn to the third filter 211. The third filter 211 is specifically an activated carbon filter. The activated carbon filter is used to deeply purify odorous and toxic gases such as hydrogen sulfide (H2S), ammonia (NH3), and volatile organic compounds (VOCs) emitted from the sewage tank through the microporous adsorption physical action of activated carbon and surface chemical modification such as KMnO4 impregnation. Finally, the exhaust fan 21 discharges the qualified gas, reducing the harm of harmful gases to the surrounding environment.

[0031] Furthermore, a first filter screen 221 is installed inside the air extraction window 22. In use, the first filter screen 221 is set as a primary physical filter, specifically a stainless steel wire mesh. The stainless steel wire mesh can effectively intercept suspended particles such as sludge flocs, water droplets, and large organic particles volatilized from the sewage tank, preventing blockage of subsequent purification units. At the same time, the stainless steel wire mesh also has the effects of corrosion resistance and washability.

[0032] Furthermore, an isolation barrier 23 is fixedly installed in the middle of the purification mechanism 2. A second filter screen 231 is installed inside the isolation barrier 23. In use, harmful gases are filtered by the first filter screen 221 and then enter the first air duct 24. The activated carbon inside the first air duct 24 will preliminarily filter the harmful gases again. Then the gas passes through the second filter screen 231 on the isolation barrier 23. The second filter screen 231 is a glass fiber composite filter screen, which is a filter medium composed of glass fiber and other functional materials such as PTFE membrane, activated carbon layer, adhesive, etc. It is mainly used for the interception and purification of particulate matter, aerosols and some gaseous pollutants in gaseous or liquid environments.

[0033] Furthermore, the isolation barrier 23 divides the internal space of the purification mechanism 2 into a first air duct 24 and a second air duct 25. In use, gas purification materials can be placed inside the first air duct 24, while the second air duct 25 is a cavity, allowing airflow to be smoothly discharged from the rear end of the exhaust fan 21.

[0034] Furthermore, an appropriate amount of activated carbon is placed inside the first air duct 24. When in use, placing an appropriate amount of activated carbon inside the first air duct 24 can further improve the purification effect of harmful gases without significantly affecting the airflow.

[0035] Furthermore, a water level ring 11 for monitoring the water level is provided on the upper side of the inner wall of the sedimentation tank 1. When in use, the staff can judge the position of the sewage according to the water level ring 11 to prevent sewage from flowing into the interior of the purification unit 2 from the air extraction window 22.

[0036] Working Principle: This utility model relates to a municipal sewage treatment tank. During operation, the sedimentation tank 1 produces unpleasant and harmful gases while treating sewage. These gases naturally rise. At this time, the exhaust fan 21 installed on the outer surface of the purification mechanism 2 activates, creating suction to draw the harmful gases into the purification mechanism 2, preventing them from being directly released into the air. The harmful gases first pass through the first filter screen 221 (stainless steel wire mesh). This layer primarily intercepts large particles of impurities such as sludge and dust floating from the sewage tank, preventing them from entering the subsequent purification layers and avoiding blockages. The gases that have undergone preliminary filtration... The air continues to flow into the second filter, 231, a glass fiber composite filter. This layer can adsorb smaller dust particles, smoke, and some harmful gases, making the air cleaner. At the same time, the appropriate amount of activated carbon in the first air duct 24 can further improve the purification effect of harmful gases. Finally, the air enters the third filter, 211, an activated carbon filter. The activated carbon acts like a "super sponge," firmly adsorbing the remaining odors and harmful gases, making the exhaust air almost odorless and meeting environmental protection standards. After being purified through three layers, the air is discharged to the outside by the exhaust fan 21, thereby reducing pollution to the surrounding environment.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A municipal wastewater treatment pond, comprising a sedimentation tank (1), characterized in that, The sedimentation tank (1) is fixedly provided with an annular purification mechanism (2) that surrounds the sedimentation tank (1) in all directions. The purification mechanism (2) has four exhaust fans (21) installed on its outer surface to form negative pressure suction. The purification mechanism (2) has several gas extraction windows (22) on its inner surface, and the purification mechanism (2) has a first air duct (24) and a second air duct (25) inside for purifying the gas.

2. A municipal sewage treatment tank as claimed in claim 1 wherein: Several fasteners (12) are fixedly installed on the outer surface of the sedimentation tank (1), and the upper end of the fasteners (12) is fixedly connected to the lower surface of the purification mechanism (2).

3. A municipal sewage treatment tank as claimed in claim 2 wherein: The exhaust fan (21) is open at both ends, with the front end connected to the interior of the purification mechanism (2) and the rear end connected to the external environment.

4. A municipal sewage treatment tank as claimed in claim 3 wherein: A third filter (211) is installed at the connection between the exhaust fan (21) and the purification mechanism (2).

5. The municipal sewage treatment pond according to claim 1, characterized in that: The first filter screen (221) is installed inside the air extraction window (22).

6. The municipal sewage treatment pond according to claim 1, characterized in that: The purification mechanism (2) has an isolation barrier (23) fixedly installed in the middle, and a second filter screen (231) is installed inside the isolation barrier (23).

7. A municipal sewage treatment pond according to claim 6, characterized in that: The isolation barrier (23) divides the internal space of the purification unit (2) into a first air duct (24) and a second air duct (25).

8. A municipal sewage treatment tank as claimed in claim 7 wherein: An appropriate amount of activated carbon is placed inside the first air duct (24).

9. The municipal sewage treatment pond of claim 1, wherein: A water level ring (11) for monitoring water level is provided on the upper side of the inner wall of the sedimentation tank (1).

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