FIELD: cleaning ventilation effluents of aerosols by filtration through grainy layers. SUBSTANCE: device is made in form of filter with several inclined filtering cells mounted in several rows in tiers. Cells are isolated by horizontal partitions. Cells consist of several layers of grainy filtering material separated by screen which makes it possible to adjust resistance of air passing through it by removal of contaminated surface layer of filtering material from first (in way of gas flow) screen. EFFECT: enhanced efficiency. 4 cl, 3 dwg
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