Method and device for implementing primary rainwater closure in municipal network system

Abstract

The invention provides a method and a device for implementing primary rainwater closure in a municipal network system. In the method, primary closure rainwater at each rainwater port in a water catchment area is taken as an object, and a floating ball control chamber and a main flow-splitting chamber are arranged on two sides of the rainwater port. When a rainfall runoff is formed, heavily-polluted primary surface chemical runoff is subjected to quantitative closure to the municipal sewage pipe network by using the difference between the two chambers and a rainwater inspection well in vertical elevation. A floating ball control valve is arranged at a primary rainwater inlet of the main flow-splitting chamber; the floating ball water level in the floating ball control chamber controls the opening and closing of the floating ball control valve; the flow-splitting effluent flows into the municipal sewage inspection well in the neighborhood; and the split flow can be realized by the effective volume of the floating ball control chamber and the opening and closing of the floating ball water level control valve. By integrally arranging the primary rainwater closure and the rainwater port, inspection well and other closure devices in the municipal network system, the method and the device can effectively realize the closure control of the primary polluted rainwater under various working conditions of actual rainfall.

Description

technical field [0001] The invention belongs to the technical field of initial rainwater pollution control, and in particular relates to a method and a technical facility for realizing initial rainwater interception by diverting water catchment areas in a municipal pipe network system. Background technique [0002] Rainwater runoff pollution is a non-point source pollution. Studies have shown that during a rainfall process, the initial runoff, which accounts for 20% of the total runoff, scours and discharges 80% of the runoff pollutant discharge. The initial rainwater runoff carried a large amount of organic matter, nitrogen, phosphorus and other pollutants, which became a direct threat to urban water bodies. According to the survey, the range and maximum value of the pollutant indicators of initial rainwater in many areas are much higher than that of typical urban domestic sewage. In some foreign cities where industrial and living point sources have been effectively contr...

AI Technical Summary

Problems solved by technology

(1) It cannot fundamentally solve the problem of effective quantitative interception of initial rainwater under different rainfall intensities; (2) It has poor connection and matching with the existing municipal pipe network system; (3) It is difficult to operate and manage, and it is not feasible to implement sex etc.

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