Process and device for the removal of H.sub.2 S
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United States of America Patent
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Jul 28, 1992
Grant Date -
N/A
app pub date -
Jan 19, 1990
filing date -
May 20, 1988
priority date (Note) -
Expired
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Abstract
Process for removing hydrogen sulfide at low concentration in a gas containing water vapor. The gas is cooled to a temperature below the dew point of water, which condenses and separates the water. The dry gas is scrubbed free of hydrogen sulfide by an H.sub.2 S-absorbent solvent forming a purified gas. The purified gas is contacted and rehydrated with heated water so that the water content as water vapor corresponds to a mass flow rate of water substantially equal to the mass flow rate of the water present in the H.sub.2 S-containing gas before cooling. The condensed water circulates in a closed circuit to contact and rehydrate the purified gas, and then is cooled to the appropriate temperature for cooling the H.sub.2 S-containing gas. An apparatus, appropriate for carrying out the process is disclosed.
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