Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1986-02-19
1987-08-25
Prunner, Kathleen J.
Gas separation
Means within gas stream for conducting concentrate to collector
55261, 55266, 55267, 55270, 55338, 7386312, 7386323, B01D 4504
Patent
active
046890521
ABSTRACT:
Disclosed is a virtual impactor for separating particles of a predetermined size range from an aerosol, and for transporting the separated particles from the region they are separated from the aerosol to an analysis/collection region remote therefrom. The device comprises a conduit member having an inlet end and an outlet end. The conduit member is configured to define a substantially enclosed passageway between the inlet end and the outlet end. At least a portion of the conduit member is gas-permeable. The outlet end of the conduit member is positioned adjacent to the analysis/collection region. The virtual impactor is moved relative to the aerosol to be sampled (or the aerosol is moved relative to the impactor). The virtual impactor utilizes an operating gas that is introduced into the impactor through the gas-permeable portion of the conduit member. The operating gas is then bifurcated into a counterflow fraction that exits the inlet end of the conduit member, and a transporting flow fraction that passes along the conduit member to the analysis/collection region. The counterflow fraction is readily adjustable to control the size of the particles entering the analysis/collection region. Since the operating gas is introduced into the conduit member through the permeable portion of that member, separated particles transported therein are prevented from colliding with the inner surface of the conduit member and are thus not lost or contaminated.
REFERENCES:
patent: 2550933 (1951-05-01), McEvoy
patent: 3011336 (1961-12-01), Weiss
patent: 3193991 (1965-07-01), Browning et al.
patent: 3199270 (1965-08-01), Oehlrich
patent: 3252323 (1966-05-01), Torgeson
patent: 3315806 (1967-04-01), Sigwart et al.
patent: 3938390 (1976-02-01), Grey
patent: 4004882 (1977-01-01), Byrne et al.
patent: 4060001 (1977-11-01), Archerd
patent: 4154088 (1979-05-01), Werner
patent: 4191541 (1980-03-01), Jenkins
Charlson Robert L.
Heinzenberg Jost
Ogren John A.
Prunner Kathleen J.
Washington Research Foundation
LandOfFree
Virtual impactor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Virtual impactor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Virtual impactor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1921265