Method and device for comprehensively purifying runoff rainwater

Abstract

The invention discloses a method and device for comprehensively purifying runoff rainwater. The runoff rainwater is collected by a collecting system and is introduced into a storing and regulating pool after being subjected to large-particle impurity removal through a grate. The runoff rainwater is subjected to water quantity regulation, water quality homogenization and primary sedimentation by the storing and regulating pool and then is introduced into a runoff rainwater purifying pool. A water inlet of the runoff rainwater purifying pool is provided with a vertical water distribution port so as to guarantee a system baffling function. A vertical baffling retaining wall is arranged downwards from the top of the purifying pool at a set distance from the water inlet of the purifying pool in a horizontal direction, and an integral baffling plate in 45-degree included angle with the retaining wall is fabricated at the bottom of the retaining wall. An oil collecting pool is arranged at the inner side of the retaining wall, a group of conical ports is arranged in the middle of the oil collecting pool in design and is used for guaranteeing the oil isolation function of the oil collecting pool. A pebble retaining wall with certain height is arranged upwards from the bottom of the purifying pool at a certain distance from an overflow gate. Slopes with certain gradient are respectivelyarranged at the bottoms of the purifying pool before and behind the pebble retaining wall, and sand collecting grooves are respectively arranged at low concave parts of the two slopes. Emptying pipesare respectively arranged at parts with certain heights at the left side and the right side of the pebble retaining wall, and are provided with valves for control.

Description

technical field [0001] The method and device proposed by the present invention can be used for bridge deck runoff treatment across sensitive water bodies and emergency response to hazardous chemical leakage accidents, water quality purification of road surface runoff near drinking water source protection areas, and construction waste water and primary rainwater water quality characteristics Similar sewage purification treatment and other fields. Background technique [0002] In addition to heavy metals, hydrocarbons and other pollutants that are harmful to the environment in the road runoff formed by precipitation, most of the pollutants in the exhaust gas of automobiles will eventually migrate to the water environment under the action of natural sedimentation or rainwater leaching , resulting in water pollution. [0003] When the road is close to the water source protection area, drinking water source and aquaculture water body, the road surface runoff formed by rainwater ...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a kind of method that can purify and treat initial rainwater road surface runoff, bridge deck runoff and water quality similar to sewage, and provide a kind of feasible device design method, can effectively overcome the low purification efficiency and no use in the prior art Degreasing function, large area, high engineering cost, complicated maintenance and management, etc., have stable and efficient removal effects on SS, petroleum, COD, ammonia nitrogen, total phosphorus and other pollutants, and have strong impact resistance

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