Initial rainwater filter

Abstract

The invention discloses an initial rainwater filter. The initial rainwater filter comprises a support bottom plate and a cover plate, wherein an outer filter screen and an inner filter screen are coaxially fixed on the support bottom plate; the cover plate covers tops of the outer filter screen and the inner filter screen; filter media are arranged between the outer filter screen and the inner filter screen; a drainage cavity is defined by the inner side of the inner filter screen; the bottom of the drainage cavity is connected with a drain pipe; a floating flow limit device is arranged at an inlet of the drain pipe. The filter adopts the outer filter screen, the filtering media and the inner filter screen to perform triple filtering on rainwater and adopts the floating flow limit device to guarantee sufficient contact of rainwater and the filtering media, and pollutants are effectively removed; when the filtering media are blocked by the pollutants, the floating flow limit device can increase flow of rainwater passing through the filter; when the filter does not work, the pollutants intercepted by the filtering media are washed out of the filter through washing, and the infiltration capacity of the filtering media is improved.

Description

technical field [0001] The invention relates to rainwater treatment equipment, in particular to an initial rainwater filter. Background technique [0002] With the acceleration of urbanization, the impermeable area on the ground is getting larger and larger, and pollutants are gradually accumulated on these impermeable ground. When it rains, the rainwater washes the ground and the pollutants are washed into the rainwater runoff system to form rainwater runoff pollution. Rainwater runoff pollution is a kind of diffuse pollution, and then enters the natural water body, causing water pollution. The pollutants include particulate matter, organic matter, heavy metals and other toxic and harmful substances. Therefore, the process of urbanization and industrialization has led to increasingly serious water crisis and rain and flood hazards. [0003] With the aggravation of water source crisis and rain and flood damage, it has become an important emerging topic to collect and utiliz...

AI Technical Summary

Problems solved by technology

[0004] At present, the collection and treatment of initial rainwater in my country is still in its infancy. The collection of initial rainwater is only to prevent it from being discharged into the water body to pollute the water quality. The purification treatment and reuse of initial rainwater are rarely considered, and most of them are directly discharged into municipal domestic sewage pipes. network

The concentration of pollutants contained in the initial rainwater is relatively high, especially the initial rainwater on the road. Direct discharge into the domestic sewage pipe network will bring a greater load to the sewage plant

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