Process for removing sulfur dioxide and nitrogen oxides from...

Details Process for removing sulfur dioxide and nitrogen oxides from... Process for removing sulfur dioxide and nitrogen oxides from...

B - Operations, Transporting

01

D

B01D 53/60 (2006.01) B01D 53/75 (2006.01)

Patent

CA 2072161

A process for removing sulfur dioxide and nitrogen oxide from flue gases in a wet scrubbing system using lime to remove the sulfur dioxide and ferrous-EDTA to remove the nitrogen oxides, where an initial reducing agent, such as sodium sulfide, and an antioxidant, such as hydrazine, are added to the scrubbing system, with oxidation of the ferrous-EDTA to ferric-EDTA curtailed while removal of nitrogen oxides is increased.

Méthode pour éliminer le dioxyde de soufre et l'oxyde d'azote dans les gaz de carneau grâce à un système de lavage par voie humide, utilisant de la chaux pour éliminer le dioxyde de soufre, et de l'EDTA ferreux pour éliminer les oxydes d'azote; un agent réducteur initial, comme le sulfure de sodium, et un antioxydant, comme l'hydrazine, sont ajoutés au système de lavage; l'oxydation de l'EDTA ferreux en EDTA ferrique est réduite à mesure que l'élimination des oxydes d'azote progresse.

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