| 主权项 |
1. Burner for a catalytic reactor comprising:
a central oxidizer supply tube for providing oxidant flow to a combustion zone of the reactor with a stationary swirler element, having an internal portion and an external portion, an oxidant inlet and an oxidant nozzle tip; an outer concentric fuel supply tube for providing fuel flow to the combustion zone with an inner side, an outer side, a fuel inlet and a fuel nozzle tip concentric with and proximate the oxidant nozzle tip; and a recycle gas duct arranged within the fuel supply tube, the recycle gas duct being further arranged within a space between the central oxidizer supply tube and the outer concentric fuel supply tube, and wherein said recycle gas duct has an inlet and a recycle gas nozzle tip the recycle gas nozzle tip comprising an inner recycle gas nozzle tip and an outer recycle gas nozzle tip, wherein the inner recycle gas nozzle tip is between the oxidizer supply tube and the outer recycle gas nozzle tip, the recycle gas duct allowing recycle gas to flow in between the central oxidizer supply tube and the outer concentric fuel supply tube, wherein the recycle gas duct is arranged so the inner recycle gas nozzle tip has a distance X from the outer side of the oxidizer supply tube, and the outer recycle gas nozzle tip has a distance Y from the inner side of the fuel supply tube, and where X is large enough to provide fuel flow passage between the outer side of the oxidizer supply tube and the inner recycle gas nozzle tip and Y is large enough to provide fuel flow passage between the inner side of the fuel supply tube and the outer recycle gas nozzle tip, and wherein the oxidant nozzle tip, the fuel nozzle tip, and the recycle gas nozzle tip are curved in direction toward the central axis of the burner such that the fluid ejected from the nozzles is directed toward the central axis of the burner, and wherein said recycle gas duct is an annular duct comprising two concentric recycle gas tubes, an inner recycle gas tube with the inner recycle gas nozzle tip and an outer recycle gas tube with the outer recycle gas nozzle tip, and wherein the recycle pas nozzle tip is upstream of the oxidant nozzle tip and the fuel nozzle tip, and the oxidant nozzle tip is upstream of the fuel nozzle tip. |
