Treatment of a combustible gas stream

摘要

In a process and apparatus for recovering sulphur from a combustible gas stream comprising hydrogen sulphide, air, commercially pure oxygen or oxygen-enriched air, and the combustible gas stream are fed to a burner 4 which fires into an elongate furnace 2. A longitudinally extending flame 12 is created which as a relatively oxygen-poor endothermic hydrogen sulphide dissociation region 14, and a relatively oxygen-rich, intense hydrogen sulphide combustion region 16. Residual hydrogen sulphide reacts with sulphur dioxide formed by the combustion to produce sulphur vapour. The furnace 2 has an aspect ratio of 8:1. The flame 12 diverges from its root to occupy at its maximum cross-sectional area at least 80% of the cross-sectional area of the furnace interior coplanar therewith.