(1) First, rinse with water, and then backwash water: First, the filter water level down to the surface of the filter layer on the 100 mm Department, access to the air a few minutes, and then backwash water. Applicable to surface pollution and heavy pollution of the internal filter.
High-performance fiber filter to remind you the appropriate valve, the closure must be in place; otherwise, the water level down to the filter layer surface below the upper part of the filter layer without water infiltration, particles up and down disturbance, dirt can not be effectively discharged, Filter layer depth movement.
(2) air and water combined backwash: from the bottom of the static filter layer into the air and backwash water at the same time, the air in the rise in the sand layer together to form a large bubble, when the filter material becomes small bubbles, On the filter surface scrub effect; back wash the top loose filter layer, the filter was suspended state, conducive to air on the filter material scrub. Backwash and anti-wash air expansion of the role of each other, than a single, the role of stronger.
Efficient fiber filter to remind you of the water backwashing pressure and air backwashing pressure and strength of different, should pay attention to the order, to avoid backwash water into the air pipe.
(3) After the air-water joint backwashing, the air is stopped, the backwash water keeps the same flow, and then rinsing for 3 min ~ 5 min can remove the bubbles left in the filter bed.