Method for reducing nitrogen oxide emissions

Details Method for reducing nitrogen oxide emissions Method for reducing nitrogen oxide emissions

B - Operations, Transporting

01

D

B01D 53/56 (2006.01) D21C 11/12 (2006.01)

Patent

CA 2579390

The present invention relates to a method for reducing nitrogen oxide emissions in combustion. Fuel is combusted in a first zone, whereby nitrogen oxides are generated. Supplementary fuel is fed in another zone under reducing conditions. At the same time, the temperature is adjusted so that nitrogen oxides convert essentially to hydrogen cyanide. Finally, air is fed in for finalizing the combustion and converting the hydrogen cyanide into nitrogen.

L'invention concerne un procédé pour réduire des émissions d'oxyde d'azote pendant la combustion. Du carburant est brûlé dans une première zone, et les oxydes d'azote sont produits. Du carburant supplémentaire est introduit dans une autre zone dans des conditions de réduction. Au même moment, la température est régulée, de sorte que les oxydes d'azote sont convertis sensiblement en cyanure d'hydrogène. Enfin, de l'air est introduit pour finaliser la combustion et la conversion de cyanure d'hydrogène en azote.

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