Control of a H.sub.2 S absorber
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United States of America Patent
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-
Sep 20, 1988
Issued Date -
N/A
app pub date -
Dec 2, 1983
filing date -
Nov 24, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an absorption process in which an absorption medium is utilized to absorb H.sub.2 S from a feed gas containing H.sub.2 S, the flow rate of the lean absorption medium is manipulated so as to maintain the actual H.sub.2 S concentration in the product gas stream from the absorption process substantially equal to a desired value for the H.sub.2 S concentration. However, if the H.sub.2 S concentration in the rich absorption medium stream exceeds a high limit, the control of the lean absorption medium flow rate so as to maintain a desired H.sub.2 S concentration in the product gas stream is overridden until such time as the H.sub.2 S concentration in the rich absorption medium stream is below the high limit.
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