Automatic backwashing filter and working method

Abstract

The invention discloses an automatic backwashing filter and a working method, which are suitable for filtering impurities in sewage. The filter comprises a runner switching main valve, a valve plate and a barrel, the valve plate is arranged on an upper opening of the barrel, and the main valve is arranged on the valve plate and communicated with the interior of the barrel through a runner; two flow channels are arranged on the valve plate, one flow channel is a filtering flow channel communicated with the inner space of the filter screen, and the other flow channel is a backwashing flow channel communicated with the space between the filter screen and the cylinder body; the flow channel switching main valve comprises a valve body, a sewage draining exit, a water inlet and a water outlet are sequentially formed in the valve body from left to right, and a filtering outlet connected with the filtering flow channel and a backwashing outlet connected with the backwashing flow channel are sequentially formed in the lower portion of the valve body from left to right; wherein a two-position five-way reversing valve group capable of automatically switching a normal working mode or a backwashing mode according to the blockage condition of the filter screen is arranged among the drain outlet, the water inlet, the water outlet, the filter outlet and the backwashing outlet. The filter is simple in structure, does not consume energy, and automatically switches backwashing.

Description

technical field [0001] The invention relates to an automatic backwash filter and a working method, and is especially suitable for an automatic backwash filter used for filtering impurities in sewage in the production of industrial and mining enterprises. Background technique [0002] 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 backwash filter can be installed vertically, horizontally, or upside down in any direction, and can be used for water filtration in various industries such as industry, agriculture, municipal power, electronics, medicine, food, printing and dyeing, construction, steel, metallurgy, and papermaking. [0003] Due to the development of intelligence (PLC, PAC...

AI Technical Summary

Problems solved by technology

The existing automatic backwash filter basically flows slowly in the cylinder when filtering, and impurities are more likely to be trapped on the inner wall of the filter to block the filter holes, resulting in a smaller filtration area and insufficient sewage treatment capacity.

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