BAG FILTER Russian patent published in 1997 - IPC

FIELD: dedusting of gases in various industries. SUBSTANCE: bag filter is provided with additional gas line connected with contaminated and pure gas headers. Additional gas line is fitted with two cut-off valves with atmospheric valve between them. In firing up the furnace with furnace fuel, valve fitted in inlet branch pipe is shut off and contaminated gas escapes to atmosphere through additional gas line, thus excluding condensation of sulfur dioxide on filter bags. After firing up the furnace, filter is placed in operation. Contaminated gas is fed to filtering section. Atmospheric valve fitted in additional gas line opens and cut-off valves close creating excessive pressure between them, thus letting no dust-laden gas into pure gas passage. EFFECT: enhanced efficiency. 2 dwg