Sewage pretreatment tank

Abstract

The invention relates to the field of sewage treatment, providing a sewage pretreatment tank. The sewage pretreatment tank comprises a sludge collecting device positioned at the lower part of a tank body, wherein the sludge collecting device is connected with a mobile sludge discharging device; the upper part of the sludge collecting device is communicated with a settlement oil separating region; a raw water inlet device and a water outlet end opposite to the raw water inlet device are arranged at two transverse ends of the settlement oil separating region; a water outlet device is arranged at the water outlet end; the settlement oil separating region comprises a water level adjusting device which forms an adjusting region at the upper part of the settlement oil separating region; a water seepage device is transversely arranged at the upper part of the adjusting region; the tank body is divided into sludge drying regions above the tank body by using the water seepage device; a filtering layer is attached to the upper part of the water seepage device; and an oil collecting device is arranged at the water outlet end of the settlement oil separating region. By using one tank body, multiple diversified functions of adjustment, settlement, oil separation, oil collection, filtering, sludge drying, and the like are achieved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an integrated sewage pretreatment pool. Background technique [0002] In the process of sewage treatment, especially when the water volume fluctuates greatly and the content of oil and suspended solids is high, the pretreatment part plays a key role in the final treatment effect of the sewage, often through the pretreatment process. Oil, suspended solids, and sludge are treated. The traditional pretreatment tank mainly adopts the method of independently setting up each pretreatment structure such as adjustment, sedimentation, oil separation, filtration, and sludge drying, so there are defects that the tank body occupies a large area and requires a large investment. [0003] Chinese patent document CN201609613 discloses an inclined tube sedimentation tank for sewage treatment, the sedimentation tank includes a sedimentation tank body, the upper part of the sedimentation tank body ...

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Problems solved by technology

[0006] Those skilled in the art, according to the patent documents disclosed above, combine the structures of the two patents after simple functional transformation to obtain a sedimentation tank capable of removing mud and suspended particles, but the sedimentation tank is It cannot realize the sewage regulating function, cannot have a good degreasing effect, and cannot realize the integrated process of the comprehensive pretreatment stage

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