Patent ID: 11911718
Assignee: ASIA CONNECTION LLC
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A method of operating a filter to remove debris from a fluid stream, comprising the steps of:
filtering a fluid stream within a filtration housing having a top end above a bottom end, and building up a mass of the filtered debris from the fluid stream to a filter substrate within the housing during a first filtering mode of operation;
after the first filtering mode of operation, directing a spray of fluid tangentially downward onto an outside surface of the filter substrate and dislodging the debris from the filter substrate during a maintenance mode of operation; and
after the maintenance mode of operation, filtering the fluid stream with the filter substrate during a second filtering mode of operation;
wherein the spray is directed from an assembly of nozzles positioned at the top of the housing;
wherein the nozzle assembly comprises a conduit having multiple nozzles thereon, the nozzles spray the iets of fluid onto the filtration substrate and the filtration substrate comprises a pleated fan-type filter cartridge having multiple folds of filtration material with the pleats having a fold line and a flat surface extending along a longitudinal axis of the housing and there is one nozzle for every three or fewer pleats, spraying the fluid along a longitudinal axis of the pleats.