COMBUSTION SYSTEMS AND PROCESSES FOR BURNING FOSSIL FUEL WITH REDUCED NITROGEN OXIDE EMISSIONS

摘要

A combustion system (200) is provided. The combustion system (200) includes a combustion zone (220) including a burner for converting a fuel, under fuel rich conditions, to a flue gas, an intermediate staged air inlet (232) downstream from the combustion zone for supplying intermediate staged air to the flue gas and producing fuel lean conditions, and a reburn zone (224) downstream from the intermediate staged air inlet for receiving the flue gas.