BURNER FOR COMBUSTION OF NITROGEN-CONTAINING FUELS

摘要

A burner for the combustion of nitrogenous fuels in a closed combustion chamber, comprises a core air tube 1 fitted with a centrally disposed oil atomiser lance, a coal dust tube 6 surrounding the core air tube, a jacket air tube 9 surrounding the dust tube with an axially displaceable ring of swirl vanes 10 disposed at the air inlet, and a burner chalice 14 which widens out towards the combustion chamber. Air nozzles for supply of additional air are arranged in a concentric arrangement around the burner chalice. The air supplied to the burner chalice is less than that required for complete combustion, and the reaction products from the partial combustion of the fuel at the burner outlet are subsequently burnt in a secondary zone by air supplied through the nozzles in excess of that required for complete combustion.