Anti-sewage-blockage water inlet and return method for filter

Abstract

The invention discloses an anti-sewage-blockage water inlet and return method for a filter. In a forward water inlet process, water flow enters water distribution channels in an annular wall of a water distribution body through a water guide part to be guided out in a divergent mode, the water flow in the water distribution body applies reverse water flow pressure to a non-return unit, the reversewater flow pressure enables a sheet-shaped tail of the non-return unit to deform, and a non-return channel formed in the sheet-shaped tail block the water flow from passing through the non-return unit along with deformation. In the backwashing process, a water flow path is divided into two parts, and water flows of a water flow path I and a water flow path II are gathered in the water distribution body to flow out through the water guide part. When water or gas-water backwashing is carried out, the non-return unit is opened at different opening degrees according to the pressure change generated by the sewage and blockage conditions of a water distribution unit, the opening degree is large if the backwashing pressure is large, conversely, the opening degree is small. According to the invention, the influence of sewage blockage on forward or reverse water flow is reduced, continuous backwashing operation of the filter can still be carried out under the condition of serious sewage blockage, the water filtering effect is improved, and the operation is simple.

Description

technical field [0001] The invention relates to a method for anti-pollution blocking and water return for filters, which belongs to the technical field of water treatment. Background technique [0002] The filter in the water treatment equipment is used to filter the particles in the water, etc. After a period of positive water production, the surface of the filter material will form a pollution layer, especially when there are many suspended solids in the incoming water , It is more likely to cause rapid fouling of the filter, reduce the water pressure of the filter, and deteriorate the filtering effect. At this time, the filter needs to be backwashed, including water backwashing or water-air backwashing, and then forward water washing. [0003] At present, when the upper water distributor is backwashing water, the pollution layer on the surface of the filter material is likely to form a huge block blockage, and the backwash water or backwash air water has a large discharge...

AI Technical Summary

Problems solved by technology

[0003] At present, when the upper water distributor is backwashing water, the pollution layer on the surface of the filter material is likely to form a huge block blockage, and the backwash water or backwash air water has a large discharge resistance, or even cannot be discharged. At this time, the filter needs to be cleaned. The clogging can be alleviated by positive washing, that is, positive water inflow, but the subsequent backwashing work will still cause clogging. Such repeated flushing with return water is cumbersome, which seriously affects the cleaning effect and reduces the cleaning efficiency.

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