Process for removing nitrogen from flue gases

Details Process for removing nitrogen from flue gases Process for removing nitrogen from flue gases

B - Operations, Transporting

01

D

B01D 53/56 (2006.01) B01D 53/86 (2006.01) F23J 15/00 (2006.01)

Patent

CA 2241119

A process for deNOxing combustion flue gases, in particular flue gases produced in an incineration plant, in which a reducing agent, which gives off ammonia at the reaction temperature, is added to the combusted gases in the post-combustion. The ammonia-containing flue gases are cooled downstream of the post-combustion. The reducing agent is once more added to the cooled ammonia-containing flue gases, and the flue gases treated in this way are subsequently fed to a catalyst element in order to catalyze the reduction of nitrogen oxides.

Méthode pour éliminer les oxydes d'azote dans les gaz de carneau, notamment dans les gaz de carneau d'une usine d'incinération, dans laquelle un agent réducteur, libérant de l'ammoniac à la température de réaction, est ajouté aux gaz de combustion dans la phase de post-combustion. Les gaz de carneau renfermant l'ammoniac sont refroidis en aval de la zone de post-combustion. L'agent réducteur est encore une fois ajouté aux gaz de carneau refroidis, renfermant de l'ammoniac; les gaz de carneau ainsi traités sont ensuite mis en contact avec un élément catalytique pour catalyser la réduction des oxydes d'azote.

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