Method for desulphurization of gases

Details Method for desulphurization of gases Method for desulphurization of gases

B - Operations, Transporting

01

D

B01D 53/52 (2006.01) B01D 53/84 (2006.01) C01B 17/05 (2006.01) C01B 17/16 (2006.01) C02F 3/34 (2006.01)

Patent

CA 2361676

The present invention relates to a method of removing hydrogen sulphide from a gas stream wherein the hydrogen sulphide is scrubbed from the gas phase by means of an aqueous solution, the hydrogen sulphide in the aqueous solution is biologically oxidized in a bioreactor to produce elemental sulphur, and the elemental sulphur is separated from the aqueous solution, characterized in that the gas stream to be treated is cooled to such a degree that at least sufficient water vapour condenses from said gas stream to compensate for the discharge stream for the purpose of removing salts. This means that no water need be supplied to the bioreactor. This method is suitable, in particular, for gas streams which contain hydrogen sulphide, the hydrogen sulphide having been obtained by catalytic conversion of sulphur compounds.

La présente invention concerne une méthode utilisée pour retirer de l'hydrogène sulfuré d'un flux gazeux, selon laquelle la phase gazeuse est épurée de l'hydrogène sulfuré au moyen d'une solution aqueuse, l'hydrogène sulfuré introduit dans la solution aqueuse est oxydé biologiquement dans un bioréacteur afin de produire du soufre élémentaire, et ce dernier est séparé de la solution aqueuse. Cette méthode se caractérise en ce que: le flux gazeux à traiter est refroidit à un degré tel qu'au moins une quantité suffisante de vapeur d'eau dudit flux gazeux se condense pour compenser le flux d'évacuation en vue du retrait des sels. Ceci signifie qu'il n'est pas nécessaire d'approvisionner le bioréacteur en eau. Cette méthode convient, en particulier, pour les flux gazeux qui contiennent de l'hydrogène sulfuré provenant de la conversion catalytique de composés sulfurés.

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