PROCESS FOR THE REMOVAL OF HYDROGEN SULPHIDE AND OTHER SOUR GAS COMPONENTS FROM INDUSTRIAL GASES UNDER PRESSURE

摘要

The invention related to a process for the removal of hydrogen sulphide and other sour gas components from industrial gases under pressure by means of physical scrubbing agents and for the recovery of sulphur from hydrogen sulphide using a Claus plant, implementing the steps listed below: .cndot. the hydrogen sulphide and the other sour gas components are absorptively dissolved in a physically acting scrubbing agent; .cndot. the physical scrubbing agent undergoes a multi-step regeneration; .cndot. the multi-step regeneration unit be equipped with one device each for CO enrichment, H2S enrichment, CO2 stripping and thermal regeneration; .cndot. the various regeneration steps operate at pressure levels that differ from each other and are lower than that of the absorption unit; .cndot. a Claus gas rich in hydrogen sulphide is withdrawn from one of the regeneration steps and fed to a Claus plant which produces sulphur; .cndot. the tail gas leaving the Claus plant undergoes hydration and is compressed to a pressure that corresponds to that of a regeneration step, and .cndot. the compressed tail gas is piped to the device for CO enrichment. The device for CO enrichment can be designed as a flash column.