Method and device for the treatment of a gas containing the 1996 sulphide and sulphur dioxide, comprising a step of depletion in sulphur of the recycled solvent

摘要

Describes a process and a device for the treatment of a gas containing hydrogen sulphide and sulphur dioxide having for its object to substantially reduce the emissions of sulphur vapour in the gases treated, the method being characterized in that it is brought into contact in a reactor - contactor (2) gas - liquid the gas with a solvent (5) and one recovers a gas (20) which is sent into a second reactor (102), where it is brought into contact again with a solvent (105), said solvent being cooled by suitable means (190), which makes it possible to separate a portion of the sulphur of the solvent. This solvent is desaturated of sulfur is used to make contact with the gas (20) from the first reactor (2). The gas (120) from the second reactor is very low content of sulphur vapour. At least one of the reactors contains a catalyst. & br / application to the purification of effluents of the claus units.