Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1976-05-21
1978-02-21
Adee, John
Gas separation
Means within gas stream for conducting concentrate to collector
55179, B01D 5304
Patent
active
040749843
ABSTRACT:
In order to recover an organic solvent from an airstream blown through one or more treatment units such as dry-cleaning machines, two adsorbers filled with activated charcoal are alternately connected between an incoming duct and an outgoing duct in series with a blower, a normally inactive air heater upstream of the adsorbers and a normally inactive air dryer downstream of the adsorbers. A programmer periodically reverses two switchover valves for passing the airstream through one or the other adsorber in respective half-cycles during which steam is blown through the inactive adsorber for regenerating its active mass. If no treatment unit requires solvent removal, the continuously circulating airstream is returned from the dryer outlet to the heater inlet through an otherwise closed bypass controlled by a valve in response to changes in duct pressure or to a switching signal from a treatment unit. At the beginning of each half-cycle, the programmer briefly activates the air heater and the air dryer to clear the newly regenerated adsorber of residual moisture; the activation command from the programmer may override a switching signal from the pressure sensor or from a treatment unit to let the drying airstream circulate through the bypass.
REFERENCES:
patent: 2428885 (1947-10-01), Luaces
patent: 3016978 (1962-01-01), Hull
patent: 3531916 (1970-10-01), Kulperger et al.
patent: 3740928 (1973-06-01), Schmid
patent: 3766713 (1973-10-01), Leonard
patent: 3883325 (1975-05-01), Fuhring et al.
patent: 3955946 (1976-05-01), Fuhring et al.
Adee John
Bowe Bohler & Weber Maschinenfabrik
Ross Karl F.
Spitzer Robert H.
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