A disposable non-woolen filter, and a panel type washable coarse aluminum filter are installed in the front panel of return air duct of each room, to trap powder generated, if any.
This paper expounds the adaptibility of coarse sand filter with simultaneous air and water backwash to tertiary filtration plant.
阐述了粗石英砂气水同时冲洗滤池，在污水深度处理中的适用性。
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Abstract: : According to the test of evaporative air handing units, it was consisted of an inertial coarsefilter, bag type filter, the hydrophilic polymer fiber filler, double fan.