B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 46/00 (2006.01) B01D 39/12 (2006.01) B01D 39/20 (2006.01) B01D 46/10 (2006.01) B01D 46/24 (2006.01) B01D 46/30 (2006.01) C10K 1/02 (2006.01)
Patent
CA 2147704
A fail-safe back-up filter system for filtering particles from a flow of hot gas in a coal gasifier or the like in the event of a failure of the primary filter system. In the event of a break in one of the primary filter elements of the filtration system, the back-up filters, having a higher porosity than the primary filters, begin to collect particulate matter such that the particulates become embedded in the back-up filter. After a period of time, the back-up filters become clogged and prevent the flow of particle laden gas through the back-up filter and the corresponding primary filter such that the flow of gas is diverted into communication with the remaining, properly functioning primary filters. The back-up filters also provide a thermal regenerator device for heating the flow of cleaning gas before it contacts the primary filter elements during back-flush cleaning in order to avoid the effects of extreme temperature fluctuations on the primary filters.
Bachovchin Dennis Michael
Bruck Gerald Joseph
Lippert Thomas Edwin
Bereskin & Parr
Westinghouse Electric Corporation
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