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Method and apparatus for filtering gas with a moving granular filter bed

United States Patent

7,309,384
December 18, 2007
View the Complete Patent at the US Patent & Trademark Office
A method and apparatus for filtering gas (58) with a moving granular filter bed (48) involves moving a mass of particulate filter material (48) downwardly through a filter compartment (35); tangentially introducing gas into the compartment (54) to move in a cyclonic path downwardly around the moving filter material (48); diverting the cyclonic path (58) to a vertical path (62) to cause the gas to directly interface with the particulate filter material (48); thence causing the gas to move upwardly through the filter material (48) through a screened partition (24, 32) into a static upper compartment (22) of a filter compartment for exodus (56) of the gas which has passed through the particulate filter material (48).
Brown; Robert C. (Ames, IA), Wistrom; Corey (Ames, IA), Smeenk; Jerod L. (Ames, IA)
Iowa State University Research Foundation, Inc. (Ames, IA)
10/ 487,130
20050016377
August 21, 2002
GRANT REFERENCE Work for this invention was funded in part by a grant from the United States Department of Energy, Contract No. DE-FG26-99FT40588. The government may have certain rights in this invention.