Sewage precipitative filter tank

Abstract

The invention discloses a sewage precipitative filter tank which comprises a tank body, wherein a coagu-flocculation reaction region, a flocculation region and a precipitative filter region are sequentially arranged outward from the center of the tank body. The coagu-flocculation reaction region and the precipitative filter region are circular unit treatment regions with sealed bottom faces. The flocculation region is a circular unit treatment region with an opened bottom face and is arranged on the peripheral side of the coagu-flocculation reaction region in a sleeving manner, the precipitative filter region is arranged on the peripheral side of the flocculation region in a sleeving manner, a water inlet pipe for introducing sewage to be treated is arranged on the lower part of the coagu-flocculation reaction region in a through manner, the upper part of the coagu-flocculation reaction region is communicated and connected with the upper part of the flocculation region, the lower part of the flocculation region is communicated and connected with the precipitative filter region, and a circular fiber filter tank is arranged around the upper part of the precipitative filter region. The filter tank disclosed by the invention realizes the purpose that the whole precipitative filter system is reasonable in arrangement, small in occupied area, small in head loss, high in effective treatment volume of the water pool, convenient for operation and management and economic and effective.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment involved in civil engineering and environmental protection engineering, and in particular relates to a sewage sedimentation filter tank for advanced treatment in sewage treatment plants. Background technique [0002] With the improvement of the country's requirements for the discharge standards of sewage treatment plants, most of the new sewage treatment plants must meet the discharge standards of Class A, and many existing sewage treatment plants must be upgraded to meet the discharge standards of Class A. Therefore, in The design and construction process involves advanced sewage treatment facilities. At present, the advanced sewage treatment usually uses the effluent of the secondary sedimentation tank to be coagulated and filtered with drugs, and then the suspended solids, phosphorus and other pollutants in the sewage are further removed to achieve a Emissions after Class A emission st...

AI Technical Summary

Problems solved by technology

[0006] In a conventional filter cloth filter, there are two types of filtration: external in-out and internal in-out. The backwashing of the filter cloth adopts two kinds of vacuum suction and hydraulic flushing. The seal is difficult to handle, resulting in a large amount of water consumption for backwashing. Hydraulic flushing requires that the filtration of the flushed part be suspended during flushing, which reduces the effective area of ​​filtration.

[0007] The above situations will increase the cost of sewage treatment and require a certain area. Especially in the upgrading and transformation of existing sewage treatment plants, for some projects with tight land use and a small head reserved for tail water discharge, traditional sewage mixing Condensation sediment filtration system is difficult to adapt

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