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US 6,164,221 AGranted
Method for reducing unburned carbon in low NOx boilers
AssigneeElectric Power Research Institute, Inc.
InventorsAnthony Facchiano, Richard A. Brown, Wate T. Bakker, Robert R. Hardman
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Abstract
The invention provides a method which includes the step of locating a burner of a low NOx boiler that produces a disproportionately high quantity of unburned carbon. The air-to-fuel ratio at the burner is then increased to decrease the percentage of unburned carbon attributable to the burner. The air-to-fuel ratio at a second burner of the low NOx boiler is reduced to maintain a substantially constant total air-to-fuel ratio in the low NOx boiler.
Claims5
A method to reduce unburned carbon in a low NOx boiler, said method comprising the steps of:
- locating a first burner that produces a higher quantity of unburned carbon than other burners of the low NOx boiler;
- increasing the air-to-fuel ratio at said first burner to decrease a percentage of unburned carbon attributable to said first burner;
- and
- reducing the air-to-fuel ratio at a second burner of said low NOx boiler to maintain a substantially constant total air-to-fuel ratio in said low NOx boiler.
1 more element
Dependencies are inferred from the claim text.