Emission reduction process for moving fluidized bed equipment

Details Emission reduction process for moving fluidized bed equipment Emission reduction process for moving fluidized bed equipment

B - Operations, Transporting

01

D

B01D 53/34 (2006.01) B01D 45/12 (2006.01) B01D 53/50 (2006.01)

Patent

CA 2109659

This invention concerns a process for reducing pollutant emissions in a circulating fluidized bed combustion facility, comprising a furnace (1), the dust from which is recovered at least in part by a cyclone (12) passing through a recovery furnace (3) and a dust collector (7) and by means of which a desulphurizing agent is introduced into the furnace (1). In the said invention, fumes are desulphurized downstream from the recovery furnace (3) and upstream from the dust collector (7) by means of a wet-dry system in a reaction chamber (4) equipped with a water spray (5). Downstream from the said dust collector (7), the resulting desulphurization products are subjected to thermal oxidation. Figure to be published: one.

La présente invention concerne un procédé de réduction des émissions de polluants dans une installation de combustion à lit fluidisé circulant, comportant un foyer (1) dont les poussières sont récupérées au moins partiellement par un cyclone (12), les gaz partiellement dépoussiérés sortant de ce cyclone (12) passant dans une chaudière de récupération (3), puis dans un dépoussiéreur (7), et selon lequel un agent désulfurant est introduit dans le foyer (1). Selon l'invention, en aval de ladite chaudière de récupération (3) et en amont du dépoussiéreur (7), les fumées sont désulfurées par voie semi-humide dans une enceinte de réaction (4) équipée d'une injection d'eau (5). En aval dudit dépoussiéreur (7), les produits de désulfuration obtenus sont oxydés thermiquement. Figure à publier : unique.

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