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Patents

Filtration System and Method:

U.S. Patent No. 10,046,261

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By: Karen McIntyre

Editor, Nonwovens Industry

Todd Dietz, Atlanta, GA.
Assigned to Osprey Corporation, Atlanta, GA.

Filed: 9/18/15
Issued: 8/14/18

A multi-stage drum filtration system comprising: (a) a primary rotary drum filter stage comprising a rotary drum and filtration media, wherein the filtration media is configured to achieve a pressure differential between 0.5-1.5 inches at 100 ft/min face velocity when the filtration media is clean and between 1.0-4.0 inches at 100 ft/min face velocity when the filtration media is loaded; (b) at least two passive filter stages coupled to an outlet side of the primary rotary drum filter stage; (c) a main fan coupled to the stages and configured to create a vacuum on an inlet side of the primary rotary drum filter stage; (d) a pressure sensor configured to monitor inlet pressure to the primary rotary drum filter stage; and (e) a controller connected to the pressure sensor and the main fan and configured to control a speed of the main fan to maintain the inlet pressure to the primary rotary drum filter stage at a pre-set level.

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