Three steps to combating moisture problems in pulse-jet baghouses for dryers
All bulk material drying systems require an air pollution control device -- a dust collector, wet scrubber, or cyclone. In explaining how to combat problems from moisture-laden dryer gas, this article focuses on one type of dust collector -- the pulse-jet baghouse. The principles discussed here can be applied to a pulse-jet baghouse in any high-temperature application, including systems with kilns, calciners, smelters, and boilers.
A pulse-jet baghouse in a drying application handles one of the toughest dust collection challenges: moisture-laden gas. Water vapor in the dryer's exhaust gas affects the baghouse's efficiency whether the unit is serving as the primary product collector (separating all the dried powder from the gas) or the secondary collector (capturing only fines and powder carryover).