Removing pollutants from aqueous liquor used to scrub fuel gasification product

A process of treating an aqueous liquor which has been used to scrub a hot raw gas produced by the gasification of a solid, liquid or gaseous fuel, which liquor has dissolved therein gaseous pollutant, comprising flashing said liquor from a temperature of at least 100 DEG C and a pressure of at leas...

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Bibliographic Details
Main Authors POCKRANDT; GUNTER, FELLNER; HELMUT
Format Patent
LanguageEnglish
Published 19.09.1978
Subjects
CHEMISTRY
FUELS
LUBRICANTS
METALLURGY
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLEGASES CONTAINING CARBON MONOXIDE
TECHNICAL GASES CONTAINING CARBON MONOXIDE
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Summary:A process of treating an aqueous liquor which has been used to scrub a hot raw gas produced by the gasification of a solid, liquid or gaseous fuel, which liquor has dissolved therein gaseous pollutant, comprising flashing said liquor from a temperature of at least 100 DEG C and a pressure of at least about 5 bars in at least on preliminary flashing stage to an intermediate pressure in the range of about 1.1 to 4 bars, separating the flashed-off gases containing the bulk of the pollutants from the residual aqueous liquor, and then flashing off the residual liquor to atmospheric pressure. The pollutant gas may contain H2S and the gas product of the preliminary flashing can be fed to a Claus process for removing sulfur compounds.
Bibliography:Application Number: US19770789302