Pollution discharge method for rotational flow automatic backwashing water filter

Abstract

The invention discloses a pollution discharge method for a rotational flow automatic backwashing water filter. An adopted device comprises a back-flushing driving motor, a filter inner cylinder, a filter outer cylinder, a cylindrical filter element, a driving main shaft, a filter element cover plate, a rotating arm type blow-off pipe, a filtered water discharge pipe, a sewage inlet pipe, a floating object discharge pipe, a back-flushing blow-off pipe, a sand discharge pipe, a floating object discharge electromagnetic valve, a back-flushing electromagnetic valve and a sand discharge electromagnetic valve, the method is characterized by comprising a drifting method, a back flushing method and a desilting method. Compared with the prior art, smooth pollution discharge of the water filter is realized, shutdown maintenance is not needed during operation, floating objects, filter cartridge adhesion objects and sediments are discharged out of the water filter through different pollution discharge channels, a single filter cartridge backwashing structure of the water filter is adopted, the backwashing effect is improved, branches can be cut into small sections by arranging a rotating plate and an edge notch of a pollution discharge pipe, dirt can be conveniently discharged out of the water filter through the sewage discharging channel, blocking is prevented, the filtering efficiency is improved, and application and popularization value is achieved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage discharge method for a cyclone automatic backwash water filter. Background technique [0002] During the flood season of the hydroelectric power station, the water quality is poor. There are a lot of floating debris such as foam plastics, wood chips, plastic bags, woven bags, and sediments in the water, and the water filter and the sewage valve are seriously blocked. Cover to access water filter. Affect the blowdown effect of the water filter. Although the water filter in the prior art is designed with upper and lower chambers, the upper chamber is a dirty water chamber, and the lower chamber is a clean water chamber. When the water containing a large amount of silt and floating matter enters the turbid water chamber from the water inlet, according to the principle of gravity separation, the silt and floating matter are first separated, and the sediment enters ...

AI Technical Summary

Problems solved by technology

At present, the filter screen installed at the liquid outlet of the cyclone desander on the market does not have the automatic backwash function. When the filter screen is clogged, it needs to be shut down to manually clean the filter screen, which does not meet the requirements for continuous and safe operation of power station automation.

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