Multi-stage dual-cycle-period sewage treatment system

Abstract

The invention discloses a multi-stage dual-cycle-period sewage treatment system. A sewage inlet is successively connected to a water pump supplying water pressure, a spiral filter for coarse filtration, and a circulating filter for fine filtration through pipelines. The circulating filter then is successively connected with an aeration tank and a separation and purification tank through pipelines.A gas source port is communicated with the upper part of the aeration tank through a gas inlet pipe. A gas source port is communicated with the upper part of the aeration tank through a gas outlet pipe. A gas recycling pump is communicated with the upper part of the aeration tank through a gas outlet pipe. A motor structure for rotation and a storage tank for collecting settlement are disposed onthe bottom of the separation and purification tank. There are a plurality of circulation pipelines in the sewage treatment system, which not only include circulation of a sewage treatment main pipeline but also include a gas pipeline circulation for gas treatment on the sewage. Due to the circulation of the sewage treatment main pipeline, the sewage can be subjected to the circulation treatment for improving treatment efficiency; and due to the design of the gas pipeline circulation, the treatment gas can be fully utilized.

Description

technical field [0001] The invention relates to a device in the field of sewage treatment, in particular to a multi-stage double-cycle sewage treatment system which improves treatment efficiency. Background technique [0002] The process of purifying sewage to meet the water quality requirements for discharge into a certain water body or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and it is also increasingly entering the daily life of ordinary people. The discharge of urban domestic sewage is already the main source of urban water pollution in China, and the treatment of domestic sewage is the top priority of urban water conservation and urban water environment protection at present and in the future. Sewage reuse has several technical difficulties to overcome: clogging, corrosion, heat transfer efficiency, etc....

AI Technical Summary

Problems solved by technology

In traditional sewage treatment, it is often necessary to use a filter structure. Most of the filter structures are superimposed by the filter screen structure. In the long-term use of filtration, a lot of pollutants and impurities will remain on the filter screen, which often leads to the filtration effect. Poor or even clogged when filtering; the design of the previous filter structure is not easy to realize when replacing the filter screen

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