A process for the recovery of elemental sulfur from a sulfur water substance arms feed gas of a sulfur production plant

摘要

Claus-type processes used in the past to recover sulfur from low H2S acid gases have not been satisfactory because hydrocarbons and other impurities in the acid gas deactivate the Claus catalyst. A method is described which overcomes this problem. The method involves using only straight-through operation. Flame stability is achieved by preheating the feed gases and by burning supplemental fuel gas in a primary zone and then burning the acid gas in a secondary zone of the furnace. Two types of furnaces employing the invention are discussed.