DEVICE AND METHOD FOR SEPARATING DUST COMPONENTS FROM AN EXPLOSIVE DUST-AIR MIXTURE

摘要

Prior to being put on-line, the filter (26, 30) of a dust extraction unit for potentially explosive products is pre-charged with an inerting agent, e.g. a mixture of silicon dioxide and calcium carbonate powder, by blowing a known amount from a weigh-receiver (64). The hazardous product dust dislodged from the filter is also discharged into the receiver under weighing or time control. Independent claims are included for; (a) A dust extraction arrangement having a filter (26) and a separate dust receiver (64) which has at least one weighing device (122,124), and a compressed air powered facility enabling inerting agent to be blown from the dust receiver into the filter, prior to putting the dust extraction unit on-line; and (b) The use of a sinter perforated floor (134) in conjunction with a funnel chimney (160) for facilitating blowing of inerting powder.