Method for removal of hydrogen sulfide from geothermal steam and condensate
AssigneeMulti-Chem Group, LLC
InventorsMichael L. Harless, Daniel K. Durham
Life of this patent
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Abstract
A method for scavenging hydrogen sulfide from geothermal steam in a condenser under vacuum. A fine curtain of atomized acrolein-water droplets may be sprayed into geothermal steam condensers in an amount of approximately 2:1 molar ratio of acrolein to H2S based on hydrogen sulfide in the incoming steam from the turbine. The range being approximately 0.1 ppm to 500 ppm of sulfide. The acrolein is allowed to react with the gas phase H2S to form non-volatile aldehyde byproducts which partition into the water phase, are returned to the cooling tower and ultimately removed by normal cooling-tower blow down.
Claims5
A method for removal of hydrogen sulfide from geothermal steam in a condenser comprising the steps of:
- injecting acrolein in an effective amount into cooling water sprayed into said condenser to provide within said condenser a curtain of fine water droplets containing said acrolein in an aqueous phase;
- allowing said fine water droplets containing said acrolein in an aqueous phase to react with vapor phase hydrogen sulfide in said geothermal steam in said condenser to produce 4-hydroxyl-tetrahydro-2H-triopyran-3-carbaldehyde and β,β′-thiodipropionaldehyde byproducts;
- and
- disposing of said byproducts in a non-volatile aqueous phase.
Dependencies are inferred from the claim text.