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US 2013/0260323 A1Published application
METHOD AND APPARATUS FOR A DUAL MODE BURNER YIELDING LOW NOx EMISSION
AssigneeEclipse, Inc.
InventorsJianhui Hong, John William Wheeler
Life of this patent
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Abstract
A method and apparatus for a burner adapted to heat a furnace or other environment of use. In particular, a burner for providing a fuel gas in combination with an oxidant to effect controlled reaction of the fuel gas in a manner to reduce NOx emissions is described. Combustion of the fuel gas is shifted from the burner combustor to a location outside the burner once the temperature within the furnace/radiant tube has reached a sufficient level to complete combustion of the fuel gas.
Claims20
A method of operating a burner comprising:
- providing a burner including a combustion chamber, a combustor outlet, a movable fuel tube, and a fuel tube movement device coupled to the movable fuel tube;
- supplying the burner with fuel and oxidant, the fuel being supplied such that the fuel enters the movable fuel tube;
- igniting the fuel and oxidant mixture in the combustion chamber;
- heating a space exterior to the combustion chamber to a temperature at or above an auto-ignition temperature of a mixture of the fuel and oxidant;
- and
- activating the fuel tube movement device to move the movable fuel tube in a direction toward the combustor outlet to extinguish the flame in the combustion chamber such that combustion occurs in the space exterior to the combustion chamber in the absence of a flame in the combustion chamber.
3 more elements
A burner comprising:
- a combustion chamber terminating at a combustor outlet;
- a movable fuel tube, the movable fuel tube including a first end disposed near the combustion chamber;
- and
- a fuel tube movement device coupled to the movable fuel tube for moving the fuel tube toward and away from the combustor outlet.
1 more element
Dependencies are inferred from the claim text.