Novel combined sedimentation tank

Abstract

The invention discloses a novel combined sedimentation tank, which comprises a water distribution ditch, a pre-sedimentation zone, a water distribution zone, a fine sedimentation zone and a water discharging ditch. The pre-sedimentation zone is internally equipped with an inclined plate settler and a sludge thickening cone. The fine sedimentation zone is equipped with an inclined tube settler, a sludge thickening cone, a floating sludge baffle and a floating sludge discharging hopper. The pre-sedimentation zone is used for sedimentation of large flocculent particles and the fine sedimentation zone is used for sedimentation of small flocculent particles. The distance between inclined plates of the inclined plate settler is larger the distance between inclined tubes of inclined tube settler. Through the floating sludge discharging hopper, floating sludge inside the floating sludge baffle is discharged outside the sedimentation tank at a fixed period. The novel combined sedimentation tank provides partition sedimentation for large and small flocculent particles, the advantage of a dual settler is utilized, and distance arrangement of inclined plates and inclined tubes enables the problem of blocking of the inclined plates or the inclined plates to be avoided, thereby achieving a high sedimentation efficiency. Through arrangement of the floating sludge discharging hopper and the floating sludge baffle, the content of floating sludge and suspended matters in discharged water is obviously decreased.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a novel composite sedimentation tank, which can be used for sedimentation of sewage after biochemical effluent. Background technique [0002] Rural domestic sewage in my country has the characteristics of scattered distribution, complex terrain, imperfect pipe network coverage, and unstable water volume, so it is not suitable for centralized sewage treatment plants for treatment. Therefore, flexible, simple and efficient integrated sewage treatment equipment came into being. However, due to the small equipment space, cumbersome operation, and cost considerations of the existing integrated sewage treatment equipment, it is difficult to use the scraper suction machine to clean the sludge in the sedimentation tank, which makes the existing integrated sewage treatment equipment exist. The sludge in the sedimentation tank cannot be cleaned and discharged in time, ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of poor settling effect, floating sludge in settling tanks and excessive suspended matter in the effluent in the existing settling tanks, the present invention proposes a new composite settling tank structure, which can significantly improve the settling effect of sludge and significantly reduce pollution. Mud floating and effluent suspended matter content

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