Low-water-loss rainwater filter tank

Abstract

The invention relates to a low-water-loss rainwater filter tank. The low-water-loss rainwater filter tank comprises a well body, a cover plate arranged above the well body, a water inlet pipe and a water outlet pipe which are arranged at the front end and the rear end of the well body, a retaining wall longitudinally arranged inside the well body and a supporting plate arranged between the retaining wall and the rear end of the well body, wherein the retaining wall and the supporting plate divide the interior of the well body into a presedimentation zone at the left side, the upper part of theright side is a filtering zone and the lower part of the right side is a sedimentation zone; the presedimentation zone is communicated with the water inlet pipe; the filtering zone is communicated with the water outlet pipe; the retaining wall is provided with a water flowing channel from the bottom surface of the well body, and the upper end of the retaining wall is provided with an overflow channel from the cover plate; a filtering medium is paved above the supporting plate; and a water flowing hole is formed in the supporting plate. The low-water-loss rainwater filter tank provided by theinvention has a good rainwater treatment effect, and pollution of pollutants on natural water body can be effectively reduced. External power drive is not required in a treatment process, and normal flood discharge is not influenced. Besides, water loss in the treatment process is low.

Description

technical field [0001] The invention relates to a rainwater purification device, in particular to a low water loss rainwater filter pool. Background technique [0002] With the acceleration of urbanization, the impermeable area on the ground has increased significantly, and pollutants have 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. Pollutants enter natural water bodies and cause water pollution. The pollutants exist in the form of particulate matter, suspended matter, and floating matter, and contain toxic and harmful substances such as organic matter and heavy metals. 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...

AI Technical Summary

Problems solved by technology

[0004] At present, the collection and treatment of initial rainwater in our 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. However, little consideration is given to the filtration and purification treatment of initial rainwater, and most of it is directly discharged into the municipal domestic sewage pipe 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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