SuRe Sulphur Recovery
SuRe Sulphur Recovery : A version of the Claus process in which the capacity of the plant is increased by using air enriched in oxygen in the production of the sulfur dioxide. There are two versions: SURE SSB [Side Stream Burner., and SURE DC [Double Combustion.. In the first, a small portion of the feed stream containing hydrogen sulfide is burnt sub-stoichiometrically in a second burner; in the second, the hydrogen sulfide is oxidized in two stages, with cooling and sulfur separation between them. Both of these modifications are to provide the hydrogen sulfide/sulfur dioxide mixture at the optimum ratio and temperature for the Claus reaction
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