The multi-column automatic backwashing filter is composed of shell, filter element, backwashing rotary mechanism, differential pressure controller and electric control part. It is a kind of automatic filter device which is easy to operate.
First, backwash working principle
Multi-column automatic backwash filter adopts high strength wedge mesh filter element, which can be cleaned automatically by pressure difference control and timing control. When the impurities in the filter accumulate on the inner surface of the filter element and cause the inlet and outlet pressure difference to increase to the set value, or the timer reaches the preset time, the electric control box sends a signal to drive the backwashing mechanism.
When the backwash suction plate port and the filter element inlet is opposite, the blowdown valve is opened, and the system is discharged and drained. At this time, a negative pressure area with relative pressure lower than the water pressure outside the filter element appears inside the sucker and the filter element. Part of the net circulating water is forced to flow from the outside of the filter element into the inside of the filter element, and the impurity particles adsorbed on the inner wall of the filter element enter the disk with the water flow and discharge from the drain valve.
Two, the characteristics of multi-column automatic backwash filter
1. Self-cleaning function: The machine uses its own filtered water, self-cleaning filter screen, do not need to remove the filter screen cleaning, do not need to configure another cleaning system;
2. Automatic backwashing function: the machine monitors the pressure difference between the clean 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 the signal, and the electric control box controls the backwashing mechanism to start and close to realize automatic backwashing;
3. Automatic program control, automatic filtration, automatic differential pressure identification, automatic backwash, automatic blowdown, low operating cost;
4. Continuous work without interruption, clean the filter element one by one, filter without interruption, filter accuracy covers 10~3000 microns;
5. Low energy consumption, large filtering area, low backwash frequency, small amount of pollution, small resistance loss of the system;
6. Good backwashing effect, filter structure design and cleaning control mode, so that backwashing strength is high, clean.
The advantages of multi-column automatic backwash filter, so that it has been applied in many fields, play a very good filtering effect, has been praised by customers.
