Method for reducing NO.sub.x using atomizing steam injection con

Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element responds proportionally to a variable signal...

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110343, 422168, B01D 5356

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active

055431160

ABSTRACT:
A method and apparatus for controlling NO.sub.x produced by a natural gas fired combustion source includes establishing a control curve for the combustion source for indicating NO.sub.x levels based on steam injection rates and fuel flow rates provided to the burners. The atomizing steam injection flow rate provided to the burner is measured as well as the fuel flow rate. A NO.sub.x level is determined for the combustion source based on the atomizing steam injection flow rate, the firing rate, and the fuel flow rate. NO.sub.x levels are lowered by adding atomized steam to the burners according to the pre-programmed control curve.

REFERENCES:
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Bailey Product Catalog E 92. 530-1, 1993.
B&W Field Service Engineering Report, Jan. 7, 1994.
Colannino, Joseph, "Low-Cost Techniques, Reduce Boiler NO.sub.x ", Chemical Engineering, Feb. 1993, pp. 100-106.

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