System and method for minimizing nitrogen oxide (nox)...

F - Mech Eng,Light,Heat,Weapons – 23 – D

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F23D 1/02 (2006.01) F23J 15/00 (2006.01)

Patent

CA 2704181

A combustion system equipped with one or more carbonaceous fuel burning combustors (e.g., slagging Cyclone combustor) and adapted to minimize nitrogen oxide (NOx) formation during staged combustion operation by selective introduction of oxygen through at least one of the combustors to create a hot sub-stoichiometric combustion zone by reducing the diluent effect of nitrogen and other inert gases present in the oxidizer/air. A method of operating the combustion system of the invention with reduced NOx emissions is also disclosed.

La présente invention concerne un système de combustion équipé d'un ou plusieurs carburateurs à brûlage de carburant carboné (par exemple, carburateur à cyclone à cendres fondues) et adapté pour minimiser la formation d'oxyde d'azote (NOx) pendant une opération de combustion étagée pour introduction sélective d'oxygène dans au moins l'un des carburateurs pour créer une zone de combustion sous-stchiométrique chaude en réduisant l'effet de dilution de l'azote et d'autres gaz inertes présents dans l'oxydant/air. Un procédé de fonctionnement du système de combustion de l'invention avec émission réduite de NOx est également révélé.

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