Process for producing and recovering elemental sulfur from acid gas
A system and process produce high actual levels of sulfur recovery from acid gas. The system includes two conventional Claus reactors and two cold bed adsorption (CBA) reactors. Four condensers are provided, one disposed before each of the catalytic reactors, and one disposed after the CBA reactor. The system includes a gas clean-up treatment zone for hydrogenation, drying and oxidation of gas to provide stoichiometric ratio of H/sub 2/S and SO/sub 2/. The gas is passed through the clean-up treatment zone prior to being fed to the first of the CBA reactors. The system is designed to operate either in a recovery mode or in a regeneration mode. In the recovery mode, the reactors are in series and the CBA reactors are operated below dew point of sulfur. In regeneration mode, effluent from the clean-up treatment zone is heated in a heat exchanger using effluent from the first catalytic reactor as the heat source. The resulting regeneration gas is fed to one of the two CBA reactors to vaporize sulfur and regenerate the catalyst. The vaporized sulfur is recovered in the condenser. The effluent from the condenser is passed to the other CBA reactor which is operated in the recovery mode during regeneration.
- Assignee:
- Standard Oil Co. (Indiana)
- Patent Number(s):
- US 4507275
- OSTI ID:
- 5497718
- Resource Relation:
- Patent File Date: Filed date 30 Aug 1983; Other Information: PAT-APPL-527909
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GASEOUS WASTES
CLAUS PROCESS
DESULFURIZATION
HYDROGEN SULFIDES
REMOVAL
SULFUR
PRODUCTION
CHEMICAL REACTORS
MATERIALS RECOVERY
SULFUR DIOXIDE
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
HYDROGEN COMPOUNDS
MANAGEMENT
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
SULFIDES
SULFUR COMPOUNDS
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management