| 摘要 |
In an absorption process in which an absorption medium is utilized to absorb H2S from a feed gas containing H2S, the flow rate of the lean absorption medium is manipulated so as to maintain the actual H2S concentration in the product gas stream from the absorption process substantially equal to a desired value for the H2S concentration. However, if the H2S 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 H2S concentration in the product gas stream is overridden until such time as the H2S concentration in the rich absorption medium stream is below the high limit.
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