1. Working principle

The multi-column automatic backwash filter is composed of a shell, a filter element, a backwash rotation mechanism, a differential pressure controller and an electric control part. The filter element adopts high-strength wedge-shaped filter screen or metal woven mesh filter element, and the filter element is automatically cleaned by pressure difference control and timing control. When the impurities in the filter accumulate on the inner surface of the filter element, the pressure difference between the inlet and outlet increases to the set value, or when the timer reaches the preset time, the electric control box sends a signal to drive the backwashing mechanism. When the mouth of the backwash suction cup is directly opposite to the inlet of the filter element, the drain valve is opened, at this time the system is depressurized and drained, and a negative pressure area with a relative pressure lower than the water pressure outside the filter element appears on the inside of the suction cup and the filter element, forcing part of the net circulation The water flows into the inner side of the filter element from the outside of the filter element, and the impurity particles adsorbed on the inner wall of the filter element enter the pan with the water flow and are discharged from the drain valve. 

2. Application field

Widely used in metallurgy, chemical industry, petroleum, papermaking, medicine, food, mining, electric power, and urban water supply.

Other relevant product recommendations

self-cleaning filter

Brush type self-cleaning filter

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