Initial rainwater and mixed rain-sewage overflow water impounding sewage facility

Abstract

The invention discloses an initial rainwater and mixed rain-sewage overflow water impounding sewage facility comprising a rainwater guide canal and a regulation reservoir arranged beside the rainwater guide canal. The rainwater guide canal is provided with a sinking intercepting channel which is provided with a side guide port communicated with the regulation reservoir. A grille area, a wetland filter plant area and a seepage filter area are arranged in the regulation reservoir sequentially along the water flow direction. Initial rainwater and mixed rain-sewage overflow water are low in flow; when guided via the rainwater guide canal, the initial rainwater and the mixed rain-sewage overflow water fall and flow into the intercepting channel at first and then flow into the regulation reservoir for purification, through the side guide port of the intercepting channel; with the passage of time, water level of the regulation reservoir rises, the intercepting channel is supported up to raise the water level thereof, and accordingly when flowing by the intercepting channel, late rainwater directly overflows from the intercepting channel and flows into downstream water through the lower segment of the rainwater guide canal; therefore, the initial rainwater and mixed rain-sewage overflow water which are severely contaminated, and the late rainwater, which is clean, are discharged separately.

Description

technical field [0001] The invention relates to the technical field of rainwater and sewage treatment and purification, in particular to a facility for retaining and storing seepage of mixed overflow water of initial rainwater and rainwater. Background technique [0002] In the early stage of rainfall, road dust, sand, oil, and even garbage quickly flow into the drainage pipes (canals) along with the initial rainwater; in addition, the mixed flow of rainwater and sewage often overflows due to the limitation of the interception multiple of the sewage pipe. Water has not been fully diluted, and its pollutant concentration is also high. If the above-mentioned polluted initial rainwater and overflow rain-sewage mixed water are directly discharged into the downstream water body, it will often cause serious pollution impacts, and the pollution will be dispersed throughout the water body. , It is difficult to clean up, and it has become one of the main reasons for the poor water q...

AI Technical Summary

Problems solved by technology

In order to reduce surface occupation and affect the landscape, storage tanks are often buried or half-buried underground. The number of earthworks, reinforced concrete structures, and emptying water pumps in the storage tank project is large, and the construction cost is high; After the rain, the initial rainwater needs to be pumped back to the sewage pipe network system through the water pump, and the sediment sediment in the pond needs to be cleaned regularly, so the daily maintenance and management cost is also high; Except for coarse mud and sand, it is only used as a temporary retention place for initial rainwater, and it is difficult to effectively purify water quality

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