Analysis of multi-column automatic backwash filter

The multi-column automatic backwash filter is composed of a housing, a filter element, a backwash rotating mechanism, a pressure difference controller and an electronic control part. It is an advanced, efficient and easy-to-operate fully automatic liquid filtration device.

How backwash works

The multi-column automatic backwash filter uses a high-strength wedge-shaped wire mesh filter element, which automatically cleans the filter element through pressure difference control and timing control. When impurities in the filter accumulate 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 a signal to drive the backwash mechanism.

When the backwash suction cup mouth is directly opposite the filter core inlet, the drain valve is opened. At this time, the system is depressurized and drained. A negative pressure zone appears between the suction cup and the filter core where the relative pressure is lower than the water pressure outside the filter core (backwash pressure difference). Control it at 3 to 4 times the filtration pressure difference).

Part of the clean circulating water is forced to flow from the outside of the filter core into the inside of the filter core. The impurity particles adsorbed on the inner wall of the filter core enter the plate with the water flow and are discharged from the drain valve.

Product Features

1. Self-cleaning function: This machine uses the clean water filtered by itself to self-clean the filter. There is no need to remove the filter for cleaning, and there is no need to configure an additional cleaning system.

2. Continuous water supply function: There are several filters installed in the tank of this machine that work at the same time. During backwash, each filter is cleaned one by one, and other filters continue to work, thereby achieving continuous water supply.

3. Automatic backwash function: This 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 backwash mechanism is controlled by the electronic control box to start. and close to achieve automatic backwashing.

Performance Characteristics

1. Automatic program control, automatic filtration, automatic identification of pressure difference, automatic backwashing, automatic sewage discharge, and low operating cost;

2. Work continuously without interruption, cleaning the filter elements one by one, with uninterrupted filtration, and the filtration accuracy covers 10~3000 microns;

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

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