Controlling concentration of chemical treatment for flue gas reduction of the oxides of nitrogen

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United States of America Patent

PATENT NO 5277135
SERIAL NO

07980600

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Abstract

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In a furnace (boiler) installation where oxides of nitrogen are to be reduced to elemental nitrogen by treatment with a reactant such as a solution of urea, the desired amount of reactant (dependent on furnace specifics) is determined by comparing the fluorescent light intensity of a sample of the treating solution to the fluorescent light intensity of a calibration standard representing the desired amount of reactant concentration; in the case of non-comparison the concentration of reactant in the treating solution is altered until the intensities are substantially identical.

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Patent Owner(s)

Patent OwnerAddress
NALCO CHEMICAL COMPANYONE NALCO CENTER NAPERVILLE ILLINOIS 60563-1198
NALCO FUEL TECH1001 FRONTENAC ROAD P O BOX 3031 NAPERVILLE IL 60566-7031

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dubin, Leonard Skokie, IL 12 294
Hoots, John E St. Charles, IL 78 1871

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