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US 4,933,163 AGranted
Process of removing hydrogen sulfide from exhaust gas
AssigneeMetallgesellschaft Aktiengesellschaft
InventorsHerbert Fischer, Manfred Kriebel
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AssigneeMetallgesellschaft Aktiengesellschaft
InventorsHerbert Fischer, Manfred Kriebel
Estimating the term…
A feed gas which contains H.sub.2 S is combusted with oxygen and air in at least one burner, which opens into a combustion chamber. The resulting gas mixture contains H.sub.2 S and SO.sub.2 and is intended to be converted to elementary sulfur by the Claus process. The combustion chamber is supplied with oxygen through a central tube of the burner, with the H.sub.2 S-containing feed gas through a second tube, which coaxially surrounds the central tube, and with air through a coaxial outer tube. The feed gas supplied to the burner contains H.sub.2 S and at least 5% by volume hydrocarbons or CO.sub.2. Velocities of flow of oxygen of 50 to 250 m/sec. and of the H.sub.2 S-containing feed gas of 10 to 30 m/sec. are adjusted at the outlet of the burner. Temperatures in the range from 2000.degree. to 3000.degree. C. are generated in the core zone of the burner flame. A gas mixture which contains at least 2% by volume CO and at least 8% by volume H.sub.2 and is at temperatures from 1350.degree. to 1650.degree. C. is withdrawn from the combustion chamber.
A process of combusting an H.sub.2 S-containing feed gas with oxygen and air in at least one burner, which opens into a combustion chamber, to produce a gas mixture which contains H.sub.2 S and SO.sub.2 for conversion to sulfur by the Claus process, wherein the combustion chamber is supplied with oxygen through the central tube of the burner, with the H.sub.2 S-containing feed gas through at least one second tube, which coaxially surrounds the central tube, and with air through a coaxial outer tube, where in the burner is supplied with an H.sub.2 S-containing feed gas which contains at least 5% by volume hydrocarbons or CO.sub.2, velocities of flow of oxygen of 50 to 250 m/sec and of the H.sub.2 S-containing feed gas of 100 to 3 m/sec are adjusted at the outlet of the burner, temperatures in the range from 2000.degree. to 3000.degree. C. are generated in the core zone of the burner flame, and a gas mixture which contains at least 2% by volume CO and at least 8% by volume H.sub. 2 and is at temperatures from 1350 to 1650.degree. C. is withdrawn from the combustion chamber.
Dependencies are inferred from the claim text.