Integrated cyclic scrubbing and condensate stripping process for the removal of gaseous impurities from gaseous mixtures
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United States of America Patent
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Oct 11, 1983
Grant Date -
N/A
app pub date -
Jan 4, 1982
filing date -
Jan 4, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for removing acid gases such as CO.sub.2 and H.sub.2 S from gas streams using a cyclic aqueous alkaline scrubbing solution which is circulated between an absorption and regeneration stage is disclosed. This process is improved by integrating within this cyclic system a process scheme wherein condensed steam having gaseous impurities dissolved therein is recovered from the feed gas and subjected to a pressure below which scrubbing solution regeneration takes place. While maintaining this pressure, the process condensate is heated, boiled and stripped to evolve a vaporous mixture comprising steam and gaseous impurities which are compressed and introduced into the regeneration stage. By this process, useful work is performed by low temperature process streams thereby improving the overall efficiency of the cyclic process.
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