Steam injection to zone of onset of combustion in fuel burner

Details Steam injection to zone of onset of combustion in fuel burner Steam injection to zone of onset of combustion in fuel burner

F - Mech Eng,Light,Heat,Weapons

23

L

158/3

F23L 7/00 (2006.01) F23D 11/40 (2006.01) F23D 14/64 (2006.01)

Patent

CA 1106750

ABSTRACT OF THE DISCLOSURE Apparatus for burning gaseous and liquid fuels in a furnace, to retard formation of NOx, comprising a fuel tube of selected length and diameter, closed at the end which is inserted into a combustion zone. There are a plurality of ports drilled in the closed end of the fuel tube, the axes of which lie on a conical surface coaxial with the fuel tube. The fuel tube is inserted coaxially into a burner tube of selected larger diameter, and the distant ends are substantially coplanar. A plurality of jets of low pressure steam are injected through a plurality of ports into the annular space between the fuel tube and the burner tube at the outer end of the burner tube. The steam jets flowing through the ports induce a flow of primary combustion air, which mixes with the steam and flows down the annular space to mix with the high velocity jets of fuel as they emerge from the ports on the fuel tube. The fuel, air, and steam mix together prior to entering the combustion reaction zone.

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