Process for desulfurizing a sulfur-dioxide containing gas

Details Process for desulfurizing a sulfur-dioxide containing gas Process for desulfurizing a sulfur-dioxide containing gas

B - Operations, Transporting

01

D

B01D 53/78 (2006.01) B01D 53/50 (2006.01)

Patent

CA 2209759

A desulfurization process using magnesium sulfites in a clear solution have the discharge from a wet scrubbing unit passed to a reaction tank. A silica-containing solid particulate material, such as sand, is added to the reaction tank and lime is added to precipitate calcium sulfite solids onto the particulate material. The resulting solids, a calcium sulfite coated, silica containing solid particulate material is readily dewatered and may be used as a cement manufacturing process.

Dans un procédé de désulfuration utilisant des sulfites de magnésium dans une solution transparente, on fait passer l'évacuation d'une unité d'épuration par voie humide dans une cuve de réaction. On introduit dans la cuve une matière particulaire renfermant de la silice, p. ex. du sable, et on ajoute de la chaux pour précipiter le sulfite de calcium solide sur la matière particulaire. Les solides résultants, une matière particulaire renfermant de la silice et revêtue de sulfite de calcium, sont facilement déshydratés et peuvent servir à la fabrication du ciment.

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