Gas separation – With means securing or retaining separating media – Unit or cohesive sheet-like media in flow line or frame
Patent
1990-04-02
1991-11-05
Chiesa, Richard L.
Gas separation
With means securing or retaining separating media
Unit or cohesive sheet-like media in flow line or frame
55490, B01D 4612
Patent
active
050628640
ABSTRACT:
Described herein is a gas filter including a plural number of axially stacked filtration units, each unit having filter membranes bonded by thermal fusion bonding to the opposite sides of a flat holder. Influent gas channels are formed between adjacent unit of the filter, and an axial gas passage for effluent filtrate gas is provided by axially aligned center openings through the flat holders. A large number of parallel ribs are provided in closely spaced relation on each side of each flat holder, each of the ribs in turn having a gradually diminishing width in section toward the outer end thereof. A large number of gas flow apertures are defined by the ribs, and gas flow passages communicate the gas flow apertures with the center openings forming the axial gas passage. In order to increase the effective filtration area of the filter, the rubs are shaped to have a gradually diminishing width in secton toward an outer tip end presenting an arcuate surface of a small radius of curvature in section, the filter membranes are fixed to the holder by thermal fusion bonding only at inner and outer mount portions, and the respective units are securely connected with each other by thermal fusion bonding at the joint portions.
REFERENCES:
patent: 2708521 (1955-05-01), Saloum
patent: 3019905 (1962-02-01), Baker et al.
patent: 3082587 (1963-03-01), Brimberg
patent: 3209915 (1965-10-01), Gutkowski
patent: 4501663 (1985-02-01), Merrill
patent: 4704207 (1987-11-01), Chu
patent: 4783262 (1988-11-01), Ostreicher et al.
Hasegawa Yoshitomo
Tsuchiya Teruyuki
Chiesa Richard L.
SMC Corporation
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