Bag filters for dust-laden gas filtration

摘要

A bag (1) for filtering dust-laden gas in a bag filter that extends between a perforated plate (22) having holes (23) and support and positioning structure adjacent to a far end (17) of a filter box, is in the form of a tubular bag made from a U-shaped tube (1) having a flexible filtering wall that is permeable to the gas but that retains the dust transported thereby, the gas penetrating into the bag (1) and flowing in filtered form to an end opening (1f) of the wall that opens out in a hole (23) of the plate (22). The U-shaped tube of the bag (1) is mounted in the enclosure in such a manner as to present two tubular filtering lengths (1a, 1b) that are substantially parallel, with the base (1c) thereof being pinched to form a substantially gastight joint and being disposed towards the far end (17) of the enclosure. The invention is applicable to bag filters for cleaning dusty premises, and to filtering discharges made to the outside.