Baghouse cleaning method

Claim 1

In a baghouse comprising a housing, a partition disposed within and sealed against said housing defining a first chamber on one side of said partition and a second chamber on the other side thereof, an inlet conduit connected to said housing for directing a process gas stream containing particulate matter into said first chamber, an outlet conduit communicating with said second chamber to exhaust process gas therefrom, a plurality of gas passages through said partition establishing communication between said first and second chambers, and a plurality of filter assemblies associated with said gas passages for removing particulate matter from process gas flowing from said first chamber to second chamber, each said filter assembly comprising a cylindrical fabric sleeve having an open end portion sealingly secured to a gas passage through said partition, an elongate tubular portion and a closed end portion extending into said first chamber, and a cylindrical foraminous cage disposed with said sleeve for skeletal support; a method of cleaning said filter assemblies comprising the steps of: restricting process gas flow through said housing to establish a pressure drop from said first chamber to said second chamber in the range of 1/4 to 11/2inches water gauge; and delivering an intermittent blast of high pressure cleaning gas to said filter assemblies to dislodge particulate matter collected thereon.