Pressure equalizing bidirectional filter and working method thereof

Abstract

The invention discloses a pressure equalizing bidirectional filter and a working method thereof. The filter comprise a communicating main pipe, communicating branch pipes, a backwashing drain pipe, a blow-down pipe, a filtering column and a filtering column base, wherein a communicating main pipe butterfly valve is arranged on the communicating main pipe; the upper end of the side face of the filtering column is connected with the upper section of the communicating main pipe by the upper communicating branch pipe; the top of the filtering column is connected with the backwashing drain pipe; the lower part of the filtering column is connected with the filtering column base; the side face of the upper part of the filtering column base is connected with the lower section of the communicating main pipe by the lower communicating branch pipe; an upper communicating branch pipe butterfly valve is arranged in the upper communicating branch pipe; a lower communicating branch pipe butterfly valve is arranged in the lower communicating branch pipe; a homogeneous filter material is filled into the filtering column; and the lower part of the filtering column base is connected with the blow-down pipe. By using the working method of the pressure equalizing bidirectional filter, an automatic balancing procedure is adopted in normal operation, and impurities in the filtering column can be cleared by performing a water filling replacing procedure at regular times. According to the invention, pressure of two water phases, namely inside water phase and outside water phase, can be dynamically balanced, water qualities are not affected by each other, and no pressure difference is formed between inside water phase and outside water phase.

Description

technical field [0001] The invention belongs to the technical field of water supply treatment, and specifically refers to a pressure-equalizing bidirectional filter and a working method thereof. Background technique [0002] In February 2001, the underwater protection project of the original site of the Baiheliang inscription in Fuling decided to adopt the "pressure-free container" cultural relics protection plan for the in-situ underwater protection of cultural relics. The core of the principle of "pressureless container" is to build a net water pressure system, which is required to be able to automatically adapt to the fluctuation of the river, so that the inscription and its protection are always in a state of flat pressure inside and outside. At the same time, the operation of the system must make the water quality in the protection body clear and transparent to ensure the underwater viewing effect. The net water pressure system constructed through various demonstration...

AI Technical Summary

Problems solved by technology

At present, conventional filters are basically one-way flow, the filter material intercepts dirt, and when the head loss reaches the set value, backwashing is started

Conventional filter filtration must provide sufficient filtration head, which cannot realize the dynamic balance of internal and external water pressure, and cannot play the role of connecting components. At the same time, it cannot meet the two-way flow under the clean water pressure system and realize the automatic backwash function by using the system program

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