Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1989-08-29
1990-06-05
Spitzer, Robert
Gas separation
Means within gas stream for conducting concentrate to collector
55208, 55387, B01D 5304
Patent
active
049302949
ABSTRACT:
An apparatus for the continuous cleaning of solvent containing waste air operates in two phases with two identical receiving towers each with at least one microwave generator and one common vacuum evaporator. In a cleaning phase, the waste air is conducted through a first tower, where the solvents are extracted from the waste air in a closed evaporator container by a receiving medium adsorbing substances of low polarity, and pure air is exhausted to the atmosphere. As soon as the receiving medium is saturated, the first tower is switched to a regenerating phase, in which the waste air is simultaneously conducted through the second receiving tower during its cleaning phase while a vacuum evaporation device and an associated microwave generator is switched on in the first receiving tower. At a low temperature, the solvents evaporate from the evaporator container isolated in the first tower and condense to collect as reusable solvent in a collecting container. After termination of the regenerating phase of the first tower and the cleaning phase of the second tower, the described process is repeated.
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