Patent ID: 7585343

Claim:
A cleaning system for use with a filter mounted to a tubesheet and in which the filter has an upstream side where particulates are separated from a fluid stream passing through the filter and collected and a downstream side that is substantially free of the particulates, the cleaning system comprising: a blowpipe for supplying a pressurized fluid and having an opening therein; a one-piece nozzle made from a tubular member having a substantially constant cross-section extending along the length of the member, the nozzle being attached to the blowpipe at a first end portion adjacent the opening in the blowpipe, the nozzle in fluid communication with the blowpipe to provide a cleaning pulse of the pressurized fluid from a second opposite end portion of the nozzle to the downstream side of the filter to dislodge particulates from the upstream side; and an aspirator formed in the first end portion of the nozzle at an upstream location spaced from the second end portion of the nozzle, the aspirator enabling an additional volume of fluid to be delivered from the second end portion of the nozzle than is delivered from the opening in blowpipe, at least a portion of the aspirator located along the nozzle upstream of the opening in the blowpipe.