Treatment of gas streams

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component

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Details

4232421, 42324409, 4235741, 423576, 4235768, 422171, 422172, 422173, 422190, B01D 5386, C01B 1704, C01B 1716, C01B 1748

Patent

active

054684587

ABSTRACT:
A part of the hydrogen sulphide content of a feed gas stream comprising hydrogen sulphide is burned by a burner that fires into a furnace. The combustion is supported by a stream of oxygen or oxygen-enriched air. Resulting sulphur dioxide reacts with residual hydrogen sulphide in the furnace to form sulphur vapor. Sulphur is condensed out of the resulting gas mixture in a sulphur condenser. At least part of the sulphur-free gas mixture flows through a reactor in which its sulphur dioxide content is reduced to hydrogen sulphide. Water vapor is removed from the resulting gas stream in a water condenser. At least part of the gas stream now essentially free of water vapor is recycled to the furnace. A purge stream is taken either from immediately downstream of the sulphur condenser or from intermediate the water condenser and the furnace, or from the furnace and, if desired, subjected to further treatment to remove sulphur-containing gases therefrom.

REFERENCES:
patent: 2413714 (1947-01-01), Keeling
patent: 4522747 (1985-11-01), Goar
patent: 4797268 (1989-01-01), McGovern et al.
patent: 4842843 (1989-06-01), Pendergraft
patent: 4844881 (1989-07-01), Gens et al.
patent: 4919912 (1990-04-01), Taggart et al.

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