A filtering method of flue gas of a boiler and a filter apparatus for hot gas

摘要

A filtering method of flue gas of a boiler employing a filter apparatus integrated with ceramic filters and provided with a control means for regenerating the ceramic filter by reverse cleaning and a detecting means for detecting directly or indirectly unburnt component, wherein valves of a compressed gas are operated by a signal transmitted from the control means when flying-over of the unburnt component is detected, thereby starting at once frequent reverse cleaning wherein the compressed gas is blown into the cleaned gas spaces and thereafter the frequent reverse cleaning having a period shorter than four minutes continues until the flying-over of the unburnt component decreases to a small quantity.