Multistage treatment equipment for domestic sewage discharge

Abstract

The utility model provides a kind of multistage treatment equipment for domestic sewage discharge, it is related to water pollution control technical field, including: inlet channel;The inlet channel is connected with sand trap above, there is coarse grid in the front side of sand trap, fine grid is arranged behind coarse grid, adjusting tank is equipped behind sand trap, and chemical treatment tank is arranged behind adjusting tank, lifting pump is equipped on the water pipe between adjusting tank and chemical treatment tank, there is sedimentation tank in the right front side of chemical treatment tank, disinfection tank is equipped in the front side of sedimentation tank, there is outlet pipe in the upside of disinfection tank, the utility model discloses coarse grid and fine grid are diagonally arranged along sand trap, which helps to improve the water flow of grid, thereby improving its filtration rate, and by setting adjusting tank and setting anti-impact plate inside, it is beneficial to balance water quality and water quantity, actively plays a role in buffering load fluctuation, can guarantee that sewage treatment system operates stably.

Description

Technical Field

[0001] This utility model belongs to the field of water pollution control technology, and more specifically, it relates to a multi-stage treatment device for domestic sewage discharge. Background Technology

[0002] Domestic sewage contains a large amount of organic matter such as proteins and fats, as well as pathogenic microorganisms such as parasite eggs. If it is discharged directly without treatment, it will inevitably pollute water bodies and easily lead to the spread of diseases. Treating domestic sewage before discharge has many positive benefits. On the one hand, it helps protect the ecological environment and improve water quality. On the other hand, it can promote resource recycling and achieve conservation, protect public health, and generate social benefits. In addition, this approach is in line with policy and sustainable development requirements and helps optimize economic benefits and costs. However, at present, most domestic sewage treatment methods use wetland systems for purification, which is a relatively complex process and takes a long time. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a multi-stage treatment device for domestic sewage discharge, thereby solving the problems of the complex processes and lengthy processing times of existing equipment.

[0004] This utility model discloses a multi-stage treatment device for domestic sewage discharge, which is achieved by the following specific technical means:

[0005] A multi-stage treatment device for domestic sewage discharge includes: an inlet channel; the inlet channel is located above and connected to a grit chamber; a coarse screen is installed in front of the grit chamber, a fine screen is arranged behind the coarse screen, an equalization tank is installed behind the grit chamber, and a chemical treatment tank is installed behind the equalization tank; a lift pump is installed on the water pipe between the equalization tank and the chemical treatment tank; a sedimentation tank is installed on the right front side of the chemical treatment tank, a disinfection tank is installed in front of the sedimentation tank, and an outlet pipe is installed above the disinfection tank.

[0006] Furthermore, both the coarse and fine screens inside the sedimentation tank are arranged diagonally.

[0007] Furthermore, the bottom surface of the regulating tank is set as an inclined bottom surface, its water inlet is at a higher position, and an anti-surge plate is installed at the water inlet.

[0008] Furthermore, the chemical treatment tanks are arranged from left to right as follows: anaerobic tank, anoxic tank, and aerobic tank.

[0009] Furthermore, the bottom surface of the sedimentation tank is designed to be sloping.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. This utility model maximizes the usable area of ​​the screen by setting coarse and fine screens along the diagonal of the sedimentation tank, which helps to increase the water flow of the screen and thus improve its filtration rate.

[0012] 2. This utility model, by setting up an equalization tank and installing an anti-surge plate inside it, is beneficial to balance water quality and quantity, plays a positive role in buffering load fluctuations, and can ensure the stable operation of the sewage treatment system; while the anti-surge plate helps to prevent the water flow from washing up the sediment at the bottom of the equalization tank again, so as not to affect the water quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of this utility model viewed from below.

[0015] Figure 3 This is a schematic diagram of the grit chamber structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the regulating tank structure of this utility model.

[0017] Figure 5 This is a schematic diagram of the sedimentation tank structure of this utility model.

[0018] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0019] 1. Inlet canal;

[0020] 2. Sedimentation tank; 201. Coarse screen; 202. Fine screen;

[0021] 3. Equalization tank; 301. Anti-surge plate;

[0022] 4. Water pipes; 401. Booster pump;

[0023] 5. Chemical treatment tank; 501. Anaerobic tank; 502. Anoxic tank; 503. Aerobic tank;

[0024] 6. Sedimentation tank;

[0025] 7. Disinfection pool;

[0026] 8. Water outlet pipe;

[0027] 9. Ground. Detailed Implementation

[0028] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0029] Example:

[0030] As attached Figure 1 To be continued Figure 5 As shown:

[0031] This utility model provides a multi-stage treatment device for domestic sewage discharge, including: an inlet channel 1; the inlet channel 1 is located above and connected to a grit chamber 2; a coarse screen 201 is provided on the front side of the grit chamber 2, and a fine screen 202 is arranged behind the coarse screen 201; an equalization tank 3 is provided behind the grit chamber 2, and a chemical treatment tank 5 is provided behind the equalization tank 3; a lift pump 401 is equipped on the water pipe 4 between the equalization tank 3 and the chemical treatment tank 5; a sedimentation tank 6 is provided on the front right side of the chemical treatment tank 5, and the bottom surface of the sedimentation tank 6 is set as an inclined bottom surface; a disinfection tank 7 is provided on the front side of the sedimentation tank 6, and an outlet pipe 8 is provided on the upper side of the disinfection tank 7.

[0032] Among them, such as Figure 3 As shown, both the coarse screen 201 and the fine screen 202 inside the sedimentation tank 2 are arranged diagonally to maximize the usable area of ​​the screen, which helps to increase the flow rate of the screen and thus improve its filtration rate.

[0033] Among them, such as Figure 4 As shown, the bottom surface of the equalization tank 3 is set as an inclined bottom surface, and its water inlet is in a higher position. An anti-surge plate 301 is installed at the water inlet, which is beneficial to balance water quality and quantity, plays a positive role in buffering load fluctuations, and can ensure the stable operation of the sewage treatment system. The anti-surge plate 301 helps to prevent the water flow from washing up the sediment at the bottom of the equalization tank 3 again, so as not to affect the water quality.

[0034] Among them, such as Figure 1 As shown, the chemical treatment tank 5, from left to right, contains an anaerobic tank 501, an anoxic tank 502, and an aerobic tank 503, respectively. Figure 2 As shown, the height difference between each treatment pool and the ground 9 is designed according to the actual situation, making reasonable use of natural factors and reducing the frequency of use of the booster pump, which is very beneficial to saving costs.

[0035] The specific usage and function of this embodiment are as follows:

[0036] In this invention, domestic sewage enters the grit chamber 2 through the inlet channel 1. A coarse screen 201 intercepts large suspended solids, while a fine screen 202 intercepts small suspended solids. The water then flows into the equalization tank 3 for sedimentation and water quality balancing, while also buffering fluctuations in water volume and load. A lift pump 401 first pumps the water into the anaerobic tank 501. Under anaerobic conditions, polyphosphate-accumulating bacteria release phosphorus and absorb easily degradable organic matter such as lower fatty acids. Simultaneously, large organic molecules are converted into low-molecular-weight volatile organic acids. After anaerobic treatment, the sewage is transferred by the lift pump to the anoxic tank 502, where denitrifying bacteria utilize organic matter as a carbon source to purify the returned mixed liquor. Nitrate is reduced to nitrogen, thus achieving denitrification. At the same time, polyphosphate-accumulating bacteria absorb volatile fatty acids and excessively absorb phosphorus. Finally, the wastewater enters the aerobic tank 503. In the aerobic environment, nitrifying bacteria oxidize ammonia nitrogen and organic nitrogen to nitrate. Heterotrophic microorganisms use organic matter for metabolism, producing energy and new microbial cells. Polyphosphate-accumulating bacteria excessively absorb phosphorus during the aerobic stage, and phosphorus removal is achieved through the discharge of excess sludge. The treated water flows into the sedimentation tank 6 for further sedimentation. After sedimentation, it enters the disinfection tank 7 for disinfection. After meeting the discharge standards, it is discharged through the drain pipe 8. The generated sludge is further treated before being used in the appropriate time.

[0037] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

Claims

1. A multi-stage treatment device for domestic sewage discharge, comprising: Water inlet channel (1); the water inlet channel (1) is located above and connected to the sedimentation tank (2). A coarse screen (201) is provided on the front side of the sedimentation tank (2), and a fine screen (202) is arranged behind the coarse screen (201). The feature is that: an equalization tank (3) is provided behind the sedimentation tank (2), and a chemical treatment tank (5) is provided behind the equalization tank (3). A booster pump (401) is provided on the water pipe (4) between the equalization tank (3) and the chemical treatment tank (5). A sedimentation tank (6) is provided on one side of the chemical treatment tank (5), and a disinfection tank (7) is provided on the front side of the sedimentation tank (6). An outlet pipe (8) is provided on the upper side of the disinfection tank (7).

2. The multi-stage treatment equipment for domestic sewage discharge as described in claim 1, characterized in that: The coarse screen (201) and fine screen (202) inside the sedimentation tank (2) are both arranged diagonally.

3. The multi-stage treatment equipment for domestic sewage discharge as described in claim 1, characterized in that: The bottom surface of the regulating tank (3) is set as an inclined bottom surface, and an anti-surge plate (301) is installed at the water inlet.

4. The multi-stage treatment equipment for domestic sewage discharge as described in claim 1, characterized in that: The chemical treatment tank (5) consists of an anaerobic tank (501), an anoxic tank (502), and an aerobic tank (503) arranged from left to right.

5. The multi-stage treatment equipment for domestic sewage discharge as described in claim 1, characterized in that: The bottom surface of the sedimentation tank (6) is set as an inclined bottom surface.

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