Foam water biochemical treatment tank

Abstract

The utility model discloses a foam water biochemical treatment pond which comprises an anaerobic biochemical pond, an anoxic biochemical pond, an aerobic biochemical pond and an inclined plate sedimentation pond, shaking bed filler is arranged in the anaerobic biochemical pond, porous medium filler is arranged in the anoxic biochemical pond, inclined plate filler is arranged in the inclined plate sedimentation pond, and the aerobic biochemical pond is arranged in the inclined plate sedimentation pond. An aeration pipe is fixedly mounted at the bottom of the anoxic biochemical pool. According to the foam water biochemical treatment tank disclosed by the utility model, the anaerobic biochemical tank, the anoxic biochemical tank, the aerobic biochemical tank, the inclined plate sedimentation tank, the porous medium filler, the inclined plate filler and the rocking bed filler are matched with one another, so that the microorganism concentration of the biochemical tank can be effectively improved; anaerobic microorganisms, facultative microorganisms and aerobic microorganisms are fixed in the corresponding anaerobic biochemical pool, anoxic biochemical pool and aerobic biochemical pool, so that foam wastewater collected from the circulating cooling water of the nuclear power station can be treated more efficiently, the treatment efficiency is improved, and the treatment cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of foam water treatment, in particular to a foam water biochemical treatment pool. Background Art

[0002] The cooling circulating water of a nuclear power plant requires a large amount of seawater, and the water temperature difference between the inlet and outlet is about 8-10℃. Due to the large amount of cooling circulating water, a large number of marine organisms and various algae will enter the cooling system. Under the action of mechanical collision, thermal action and chemical action (disinfectant), the marine organisms and various algae in the cooling cycle will die and decompose, causing the circulating cooling water to contain more organic matter. The circulating cooling water is usually taken from the ocean through the grille interception by the booster pump at the water intake, and then lifted to the condensate for heat exchange and discharged into the overflow weir, and then discharged into the siphon well, and finally discharged to the ocean through the drainage pipe for natural diffusion and cooling. For safety reasons, the overflow weir has a certain height difference with the sea level, so the warm water after heat exchange is discharged from the overflow weir. When discharging into the siphon well, hydraulic jump will inevitably occur and forced aeration will be generated, forming a phenomenon of water entrainment within a certain range. When the water flows to the release sea area, the bubbles will overflow the water surface and form a very stable foam, thereby forming a long foam belt at the circulating cooling water discharge port. The foam part in the cooling circulating water is enriched with a large amount of organic matter and nutrients, forming a large area of foam area in the sea area around the nuclear power plant with strong persistence. It not only pollutes the surrounding sea area to a certain extent, but also causes people to often mistakenly believe that the nuclear power plant has discharged a large amount of toxic and harmful pollutants into the surrounding sea area, that is, the so-called sensory pollution, which greatly affects the public, especially the people in the area where the nuclear power plant is located, to accept and recognize the nuclear power plant. Therefore, it is very necessary to effectively remove the pollution of the circulating cooling seawater.

[0003] The existing technology mainly optimizes the overflow weir of the siphon well, installs baffles in the siphon well and takes defoaming measures to reduce the amount of foam generated. Some nuclear power plants also adopt the measure of adding defoaming agents, adding defoaming agents to the siphon well and mixing them with the discharged circulating cooling water to reduce the number and area of foam belts formed on the sea surface. The above measures have not fundamentally solved the problem of organic pollution caused by the fragmentation of fish, plankton and algae due to the heating and violent movement of circulating cooling water. Utility Model Content

[0004] The main purpose of the utility model is to provide a foam water biochemical treatment pool, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A foam water biochemical treatment tank comprises an anaerobic biochemical tank, an anoxic biochemical tank, an aerobic biochemical tank and an inclined plate sedimentation tank. The anaerobic biochemical tank and the anoxic biochemical tank are both provided with shaking bed fillers, the aerobic biochemical tank is provided with porous medium fillers, the inclined plate sedimentation tank is provided with inclined plate fillers, an aeration pipe is fixedly installed at the bottom of the aerobic biochemical tank, and an aeration disk is fixedly installed at the air outlet end of the aeration pipe.

[0007] Preferably, the anaerobic biochemical tank, anoxic biochemical tank, aerobic biochemical tank and inclined plate sedimentation tank are connected in sequence through a drainage pipe, the inclined plate sedimentation tank is connected to the anaerobic biochemical tank through a return pipe, and the aerobic biochemical tank is connected to the anoxic biochemical tank through a return pipe.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] In the utility model, by arranging an anaerobic biochemical tank, an anoxic biochemical tank, an aerobic biochemical tank, an inclined plate sedimentation tank, a porous medium filler, an inclined plate filler and a shaking bed filler in coordination with each other, the microbial concentration in the biochemical tank can be effectively increased, and the anaerobic microorganisms, facultative anaerobic microorganisms and aerobic microorganisms can be fixed in the corresponding anaerobic biochemical tank, anoxic biochemical tank and aerobic biochemical tank, so that the foam wastewater collected from the circulating cooling water of the nuclear power plant can be more efficiently treated, the treatment efficiency can be improved and the treatment cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the overall structural diagram of a foam water biochemical treatment pool of the utility model;

[0011] Figure 2 This is a process flow chart of a foam water biochemical treatment pool of the utility model.

[0012] In the figure: 1. Anaerobic biochemical tank; 2. Anoxic biochemical tank; 3. Aerobic biochemical tank; 4. Inclined plate sedimentation tank; 5. Porous media filler; 6. Inclined plate filler; 7. Aeration pipe; 8. Aeration disk; 9. Shaking bed filler. DETAILED DESCRIPTION

[0013] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0014] like Figure 1-2The foam water biochemical treatment tank shown includes an anaerobic biochemical tank 1, an anoxic biochemical tank 2, an aerobic biochemical tank 3 and an inclined plate sedimentation tank 4. The anaerobic biochemical tank 1 and the anoxic biochemical tank 2 are both provided with a shaking bed filler 9, the aerobic biochemical tank 3 is provided with a porous medium filler 5, and the inclined plate sedimentation tank 4 is provided with an inclined plate filler 6. An aeration pipe 7 is fixedly installed at the bottom of the aerobic biochemical tank 3, and an aeration disk 8 is fixedly installed at the air outlet end of the aeration pipe 7. The aeration pipe 7 can provide a sufficient oxygen environment to the aerobic biochemical tank 3.

[0015] The anaerobic biochemical tank 1, the anoxic biochemical tank 2, the aerobic biochemical tank 3 and the inclined plate sedimentation tank 4 are connected in sequence through the drainage pipe. The inclined plate sedimentation tank 4 is connected with the anaerobic biochemical tank 1 through the return pipe. The aerobic biochemical tank 3 is connected with the anoxic biochemical tank 2 through the return pipe. The settled microorganisms (activated sludge) in the inclined plate sedimentation tank 4 are returned to the anaerobic biochemical tank 1 through the return pipe, thereby maintaining the activated sludge concentration of the biochemical tank.

[0016] It should be noted that the present invention is a foam water biochemical treatment tank. When in use, the circulating cooling foam wastewater flows through the anaerobic biochemical tank 1, the anoxic biochemical tank 2, the aerobic biochemical tank 3 and the inclined plate sedimentation tank 4 in sequence. The organic pollutants in the foam water are degraded by the anaerobic, facultative and aerobic microorganisms in the anaerobic biochemical tank 1, the anoxic biochemical tank 2 and the aerobic biochemical tank 3. The microorganisms are then separated from the treated water by the inclined plate sedimentation tank 4. The settled microorganisms are separated by the inclined plate sedimentation tank 4, and the supernatant is discharged in compliance with the standards. The settled microorganisms (activated sludge) are returned to the anaerobic biochemical tank 1 through the return pipe, thereby maintaining the activated sludge concentration of the biochemical tank. The mixed liquid of the aerobic biochemical tank 3 is returned to the anoxic biochemical tank 2. , completing the nitrification and denitrification processes, removing ammonia nitrogen in the foam water, and setting a shaking bed filler 9 made of polymer material in the anaerobic biochemical tank 1 and the anoxic biochemical tank 2, so that a large number of anaerobic microorganisms and facultative anaerobic microorganisms can attach to the shaking bed filler 9 of the anaerobic biochemical tank 1 or the anoxic biochemical tank 2, and the pool capacity of the anaerobic biochemical tank 1 and the anoxic biochemical tank 2 can be fully utilized, so that the foam wastewater can fully contact with the microorganisms attached to the filler, thereby improving the efficiency of the anaerobic / anoxic biochemical tank. The porous medium filler 5 in the aerobic biochemical tank 3 can provide a more suitable living environment for salt-tolerant microorganisms, forming a variety of biological environments with surface aerobic, internal anoxic or anaerobic, thereby improving the removal efficiency of pollutants.

[0017] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A foam water biochemical treatment pool, characterized by: The invention comprises an anaerobic biochemical tank (1), an anoxic biochemical tank (2), an aerobic biochemical tank (3) and an inclined plate sedimentation tank (4); the interiors of the anaerobic biochemical tank (1) and the anoxic biochemical tank (2) are both provided with a shaking bed filler (9); the interior of the aerobic biochemical tank (3) is provided with a porous medium filler (5); the interior of the inclined plate sedimentation tank (4) is provided with an inclined plate filler (6); an aeration pipe (7) is fixedly installed at the bottom of the aerobic biochemical tank (3); and an aeration disk (8) is fixedly installed at the air outlet end of the aeration pipe (7).

2. A foam water biochemical treatment pool according to claim 1, characterized in that: The anaerobic biochemical tank (1), the anoxic biochemical tank (2), the aerobic biochemical tank (3) and the inclined plate sedimentation tank (4) are sequentially connected through a discharge pipe; the inclined plate sedimentation tank (4) is connected to the anaerobic biochemical tank (1) through a return pipe; and the aerobic biochemical tank (3) is connected to the anoxic biochemical tank (2) through a return pipe.

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