Process and system for producing and recovering elemental sulfur

Details Process and system for producing and recovering elemental sulfur Process and system for producing and recovering elemental sulfur

1983-08-30

1985-04-02

Thomas, Earl C.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

423576, C01B 1704

Patent

active

045086982

ABSTRACT:
A straight-through three reactor system and process produces acceptable levels of sulfur recovery from acid gas at a cost significantly less than that required for a standard modified four reactor Claus system. The system includes two conventional Claus reactors and one cold bed adsorption (CBA) reactor in series. Four condensers are provided, one disposed before each of the catalytic reactors, and one disposed after the CBA reactor. 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 last reactor is operated below dew point of sulfur (CBA reactor). In regeneration mode, effluent from the third condenser is heated in a first heat exchanger where effluent from the first catalytic reactor is used as the heat source. Sulfur is vaporized in the CBA reactor and is recovered in the fourth condenser. Effluent from the fourth condenser is then passed to an incinerator.

REFERENCES:
patent: Re28830 (1976-05-01), Hunt, Jr. et al.
patent: 2767062 (1956-10-01), Duecker
patent: 4035474 (1977-07-01), Kunkel et al.
patent: 4180554 (1979-12-01), Goddin, Jr. et al.
patent: 4309402 (1982-01-01), Al-Muddaris
patent: 4315904 (1982-02-01), Lell et al.
"MCRC Process for Improving Claus Plant Recovery"--A. B. Coady, 6-9-1976; Presented to Canadian Natural Gas Processor's Assoc.
"MAXISULF-A Process to Enhance Sulphur Recovery In Claus Plants"--R. Lell and U. Neumann, Davy McKee AG.
"The MCRC Sub-Dewpoint Sulphur Recovery Process"--R. E. Heigold and D. E. Berkeley, Delta Projects Limited.

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