Removal procedure sulfur compounds H2S, SO2, COS and / or CS2 contained in a residual sulfur factory gas with recovery of such compounds in the form of sulfur.

摘要

The waste gas (6) is hydrolyzed catalytically (1) to form a hydrolyzate (15) containing gas H 2 and SO 2 and COS-FREE CS 2. After cooling (17), gas hydrolyzate is introduced into a (2A) of the two zones catalytic CLAUS (2A, 2B) mounted in parallel, the other being catalytic zone (2B) for regeneration, COS and / or CS2 RESIDUAL CONTENT IN A GAS fACTORY AYA CONTINUATION cooling. REGENERATION IS DONE IN OPEN CIRCUIT, with a gaseous stream (19, 36) obtained from the gas (15) before cooling (17), the offgas (24b) REGENERATION reinjected (29, 30) on the GAS, between extraction (19) and cooling (17). THE COOLING REACTOR (2B) is performed, OPEN CIRCUIT, with a gaseous stream (11, 36) obtained from waste gas (6), the offgas (24B) COOLING Reintroduced (29, 13) in the waste gas (6) between extraction (11) and heating.