Sedimentation basin for mud-water separation and secondary sedimentation basin system

Abstract

The invention provides a sedimentation basin for mud-water separation, and relates to the field of sewage treatment. The sedimentation basin comprises a basin body, which comprises an upper sedimentation area and a lower mud area, the lower mud area is arranged in a funnel shape, the bottom of the basin body is provided with a mud falling hole, an air-blocking plate is fixedly arranged on the lateral part of, below or above the mud falling hole, and the vertical projection of the mud falling hole falls on the air-blocking plate completely. The invention further relates to a secondary sedimentation basin system for the mud-water separation. The system comprises a sewage pool, an aeration device and the sedimentation basin for the mud-water separation. The sedimentation basin provided by theinvention can cause sludge to slide down automatically through the funnel-shaped lower mud area, the mud discharge efficiency is high, and a stable sedimentation area can form in the sedimentation basin through the air-blocking plate. The secondary sedimentation basin system provided by the invention can fully aerate the sludge at the bottom of the sewage pool, the sludge floating upward pheonomena are reduced, the water distribution requirement is low, the structure is simple, the use is convenient, and the operation is stable and reliable.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a sedimentation tank used for mud-water separation. The invention also relates to a secondary sedimentation tank system for mud-water separation. Background technique [0002] With the improvement of environmental protection requirements, in order to protect the ecological environment, some sewage needs to be treated by sewage biochemical treatment, and the treated sewage can only be discharged after reaching the discharge standard. The mud-water separation process is the core part of the sewage biochemical treatment process. In the mud-water separation process, the secondary sedimentation tank is mainly used for the mud-water separation treatment of the sewage. In the prior art, advective secondary sedimentation tanks and inclined plate (tube) type secondary sedimentation tanks are commonly used. Factors such as oxygen denitrification and sludge mobility. In the prior art, the...

AI Technical Summary

Problems solved by technology

In the prior art, the Chinese patent document with the publication number CN108434795A discloses a secondary settling tank for continuous sewage biological treatment. There is no aeration device in this secondary settling tank, which cannot avoid the sludge at the bottom of the tank. Oxygen denitrification, easy to form denitrification floating mud phenomenon

There is no baffle under the diversion tank, and the floating mud that floats up is easy to float into the diversion tank

Another example is that the Chinese patent literature with the publication number CN206853198U discloses a novel vertical flow secondary settling tank. The vertical flow secondary settling tank needs to adopt a center water inlet, and a central water inlet pipe needs to be set, and then the water is evenly distributed through the reflection plate at the bottom of the water inlet pipe. , when the pool area is too large and the height is insufficient, short flow is likely to occur, and the aeration device of this vertical flow secondary sedimentation tank is only set directly below the central barrel, which cannot aerate all the sludge at the bottom of the tank, which will cause the pool Insufficient aeration of the bottom sludge results in floating phenomena, and the above-mentioned vertical flow secondary sedimentation tank needs to be equipped with sloping plates around the inner side of the middle of the tank body and mud buckets at the bottom of the tank, which has a complicated structure and high manufacturing cost

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