초록 ▼

To allow liquid and/or gaseous fuels to be burned with decreased NOx formation, the combustion air is fed in at axial intervals one after the other. The percentage of primary air is higher than that of secondary air. The injector effect of the primary air draws flue gas out of the firebox and suppli

To allow liquid and/or gaseous fuels to be burned with decreased NOx formation, the combustion air is fed in at axial intervals one after the other. The percentage of primary air is higher than that of secondary air. The injector effect of the primary air draws flue gas out of the firebox and supplies it to a flame-initiation point between the primary-air and secondary-air feeds.

대표청구항 ▼

Method of burning liquid or gaseous fuels in a firebox with reduced formation of NOx, comprising the steps of: supplying combustion air in portions of primary and secondary air; feeding said portions in one after the other at axial intervals parallel to flow of combustion gases, said primary air gen

Method of burning liquid or gaseous fuels in a firebox with reduced formation of NOx, comprising the steps of: supplying combustion air in portions of primary and secondary air; feeding said portions in one after the other at axial intervals parallel to flow of combustion gases, said primary air generating an injector effect for drawing combustion gases in, said primary air being supplied at a percentage of the total combustion air that is higher than that of the secondary air; and drawing out extensively burned combustion gases from the firebox downstream of the feeding of said secondary air and conducting to a flame-initiation point between primary-air and secondary-air feeds, so that said burned combustion gases produce a gaseous separating layer between said primary air and said secondary air, said gaseous layer being comprised of substantially inert combustion gas and delaying access of the secondary air to said flame-initiation point for delaying combustion with reduced formation of NOx.