The multi-column automatic backwash filter is composed of a shell, a filter element, a backwash rotary mechanism, a differential pressure controller and an electric control part. It is an advanced, efficient and easy-to-operate fully automatic filter device.

How Backwashing Works

   The multi-column automatic backwash filter adopts a high-strength wedge-shaped wire mesh filter element, which automatically cleans the filter element through pressure difference control and timing control. When the impurity in the filter is accumulated on the inner surface of the filter element, causing the inlet and outlet pressure difference to increase to the set value, or when the timer reaches the preset time, the electric control box sends out a signal to drive the backwashing mechanism.

   When the mouth of the backwash suction cup is directly facing the inlet of the filter element, the drain valve opens, and the system releases pressure and drains water, and a negative pressure zone 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 (backwash pressure difference value Controlled at 3~4 times of the filter differential pressure value).

Part of the net circulating water is forced to flow from the outside of the filter element to the inside 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.

Three major product functions

Self-cleaning function: This machine uses the clear water filtered by itself to self-clean the filter screen. It does not need to remove the filter screen for cleaning, and does not need to configure an additional cleaning system.

Continuous water supply function: Several filters are installed in the tank of the machine to work at the same time. When backwashing, each filter is cleaned one by one, and the other filters are still working, so as to realize continuous water supply.

Automatic backwashing function: The machine monitors the pressure difference between the clear water area and the muddy water area through the pressure difference controller. When the pressure difference reaches the set value, the pressure difference controller outputs a signal, and the backwashing mechanism is controlled by the electric control box to start and stop , to achieve automatic backwashing.

Four performance characteristics

Automatic program control, automatic filtration, automatic identification of differential pressure, automatic backwashing, automatic sewage discharge, low operating cost;

Uninterrupted continuous work, cleaning the filter elements one by one, uninterrupted filtration, the filtration accuracy covers 10~3000 microns;

High efficiency and low energy consumption, large effective filtration area, low backwash frequency, small sewage discharge, and small system resistance loss;

The backwashing effect is good, and the unique filter structure design and cleaning control method make the backwashing intensity high and the cleaning thorough.

Application field