Methods and characteristics of quartz sand filter backwashing
there are two kinds of quartz sand filter backwashing way, is a kind of air water backwashing, the other is a kind of backwashing water.
air water backwashing is the use of air bubbles and quartz sand filter material friction between the two, moreover is in using quartz sand filter material of the friction between particle and particle, the last is the use of quartz sand filter material and water photograph rushs friction, four interaction, on the maximum limit increased the backwash effect, so that after the water washing of the quartz sand filter material can be used. The commonly used in the filter tank is bigger, quartz sand filter material is more. Advantages are: the backwashing time is shorter, less water consumption.
water backwashing mainly through quartz sand filter material and water photograph rushs friction friction and sand and sand off the impurities in the water, commonly used in the small filter is more, the backwash water in 2 times running flow, features are: do not need to provide pouring, water consumption is bigger, the operation is simple.