Hot gas filtration system fail-safe and thermal regeneration dev

Details Hot gas filtration system fail-safe and thermal regeneration dev Hot gas filtration system fail-safe and thermal regeneration dev

1994-04-25

1995-07-18

Bushey, C. Scott

Gas separation: processes

Filtering

With cleaning of filter

55267, 55302, 55486, 55487, 55523, 55525, 95288, B01D 4600

Patent

active

054337712

ABSTRACT:
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.

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