Process of removing nitrogen oxides from flue gases from a...

Details Process of removing nitrogen oxides from flue gases from a... Process of removing nitrogen oxides from flue gases from a...

C - Chemistry, Metallurgy

10

G

C10G 11/18 (2006.01) B01D 50/00 (2006.01) B01D 53/86 (2006.01)

Patent

CA 2476997

A process for removing nitrogen oxides from flue gases of a fluidized catalytic cracking unit wherein the flue gas is introduced into a tertiary cyclone (12, 22) with percentages of separated solids being discharged in both the overflow (101, 201) and underflow (102, 202) from the cyclone, treating the overflow in a catalytic reduction unit (14, 25) to form an outlet gas and treating the underflow and outlet gas in a wet scrubber (15, 26).

La présente invention concerne un procédé permettant d'éliminer les oxydes d'azote présents dans des gaz de combustion issus d'une unité de craquage catalytique en lit fluidisé. Dans ce procédé, les gaz de combustion sont introduits dans un cyclone tertiaire (12, 22), des pourcentages de solides séparés étant déversés dans le trop-plein (101,¿ ?201) et le sous-écoulement (102, 202) à la sortie du cyclone, et le trop-plein étant traité dans une unité de réduction catalytique (14, 25) pour former un gaz de sortie et le sous-écoulement et le gaz de sortie étant traités dans un épurateur par voie humide (15, 26).

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