Temperature moderation of an oxygen enriched Claus sulfur plant
AssigneesGAA Engineered Systems, Inc., Air Products and Chemicals, Inc.
InventorB. Gene Goar
Life of this patent
Estimating the term…
Abstract
A process and system are set forth for improving an oxygen-enriched Claus plant by recycling effluent from the first condenser back to the reaction furnace to moderate oxygen induced high temperatures and thus allow additional oxygen-enrichment and attendant throughput in the Claus plant.
Claims12
In a process for recovering sulfur from a feed gas stream rich in hydrogen sulfide wherein the gas stream is partially combusted with an oxygen-enriched gas in a Claus reaction furnace zone, the combustion effluent is cooled with the attendant condensation and separation of sulfur in a first condensation zone and the remaining effluent stream is passed through at least one stage of reheating, conversion in a catalytic Claus reaction zone and cooling with attendant condensation and separation of sulfur in an additional condensation zone, the improvement comprising recycling a portion of the reacted effluent stream from the first condensation zone to the reaction furnace zone in order to moderate the temperature of the reaction furnace zone.
In a system for recovering sulfur from a feed gas stream containing a significant amount of hydrogen sulfide by the Claus reaction including:
- a reaction furnace for partially combusting the feed gas stream with an oxygen-enriched gas, a first condensing means for cooling and condensing sulfur from the combustion effluent, at least one train comprising a reheater means, a catalytic Claus reactor and an additional condensing means for rewarming, further reacting and recovering sulfur from said effluent, the improvement comprising recycle means for recycling a portion of the reacted effluent stream from said first condensing means to said reaction furnace.
Dependencies are inferred from the claim text.