Terminal floating filter of separate rainwater drainage system

Abstract

The invention discloses a terminal floating filter of a separate rainwater drainage system. The terminal floating filter comprises: a suspended matter filtering zone horizontally communicated with a water inlet and a water outlet; a mud settling zone arranged below the suspended matter filtering zone and used for collecting impurities filtered by the suspended matter filtering zone; an overflow zone arranged above the suspended matter filtering zone; a weir filtering layer that isolates the suspended matter filtering zone to filter rainwater and which includes a container with filter holes, asuspended particle filtering material fitted in the container and a fastener to compress the suspended particle filtering material in the container, wherein the side, facing the water inlet, of the container is tilted to the water inlet. The terminal floating filter is simple in structure and low in cost, has no need for power and is convenient to maintain; suspended matters in water and other pollutants attached to the suspended matters can be effectively removed; the weir floating filter layer helps well overcome the defects that mud film easily forms on the surface of a traditional filter,a filter layer blocks easily, and a filtering material is troublesome to wash; the filtering layer herein is convenient and thorough to wash.

Description

technical field [0001] The invention relates to the technical field of drainage filtration, in particular to a terminal floating filter device of a separate rainwater drainage system. Background technique [0002] Suspended solids are one of the important pollutants in stormwater runoff. Urban stormwater runoff contains a large amount of suspended solids, which mainly come from the debris produced by the corrosion of vehicles, exhaust gas produced by motor vehicles, atmospheric dry and wet sediments, tires and Substances produced by brake friction and smoke and dust released by residents' chimneys, etc. In addition to its own pollution, suspended matter is also the carrier of many other pollutants (such as heavy metals, N, P, oily substances, toxic oil hydrocarbons (PHC) and polycyclic aromatic hydrocarbons (PAHS), etc.). Suspended particles with large surface area. Before the rainwater runoff in the drainage pipe network is discharged into the receiving water body, the ef...

AI Technical Summary

Problems solved by technology

Among them, during the cyclone sedimentation, due to the instability of the incoming water, the effect of the hydrocyclone is difficult to control stably, which will inevitably affect the sedimentation effect, and the removal rate of the total suspended solids is difficult to improve.

For the advection sedimentation tank, since the residence time is the main factor determining the sedimentation of suspended solids, the rainwater terminal treatment device of the advection sedimentation has a larger volume and requires a higher site area, which affects the promotion and application

However, the SS removal device based on the filtration principle has the problems of easy blockage of the filter layer, difficulty in cleaning the filter material, and troublesome maintenance in the later stage.

[0004] At present, the terminal purification devices of diversion system rainwater drainage systems for the removal of suspended solids in China mainly adopt the principle of advection sedimentation or swirl sedimentation tanks. These devices either occupy a large area, have high cost, or require relatively harsh hydraulic conditions. The head loss is relatively large, and there is still a big gap in the effect of rainwater pollution control

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