Back flush filter

Abstract

The invention provides a back flush filter, relating to the field of sewage purification treatment facilities. The back flush filter comprises a shell, an electrodynamic mechanism, a coarse screen, a fine screen, a sewage suction device and a gas supply unit, wherein the coarse screen and fine screen are arranged in the cavity of the shell; the coarse screen and fine screen are respectively cylindrical, and form a back flush chamber with the inner wall of the shell; one end of the shell is provided with a sewage inlet; the upper end of the shell is provided with the electrodynamic mechanism and a purified water outlet; the lower end of the shell is provided with a drainage port; the sewage suction device comprises a drainage pipe, a high-pressure gas pipe, a sewage suction pipe and an exhaust pipe; the high-pressure gas pipe is sheathed in the drainage pipe; the sewage suction pipe communicates with the inner cavity of the drainage pipe; the exhaust pipe penetrates through the wall of the drainage pipe and communicates with the inner cavity of the high-pressure gas pipe; the exhaust pipe comprises a straight-opening pipe and a bent-opening pipe; and the gas supply unit comprises a motor, a gas pump and a gas supply pipe. The back flush filter has the advantages of high cleaning efficiency and thorough cleaning, and can satisfy the quality requirements for sewage filtration and automatic drainage.

Description

technical field [0001] The invention relates to the field of sewage purification treatment equipment, in particular to a backwash filter. Background technique [0002] In the process of sewage treatment, water enters the filter from the inlet. As the filtration progresses, dirt and impurities in the water gradually accumulate on the surface of the filter material and the filter screen, and the blockage of the upper surface of the filter screen will affect the filtering effect and the quality of the effluent water. Backwashing is required to restore filter capacity. [0003] Backwash filter is a kind of filter that directly intercepts impurities in water, removes suspended solids and particulate matter in water, reduces turbidity, purifies water quality, reduces system dirt, bacteria and algae, rust, etc., to purify water quality and protect other equipment in the system Precision equipment that works properly. The water enters the body of the backwash filter from the water...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides a backwash filter, which overcomes the problems of limited backwash degree, incomplete cleaning and low cleaning efficiency of the existing backwash filter in the prior art

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