METHOD AND APPARATUS FOR REDUCING NOX EMISSION TO THE ATMOSPHERE

摘要

An improved method and apparatus for reducing NOx emissions to the atmosphere from stationary combustion sources. The improvement is accomplished by providing a plurality of zone and/or stages for injecting a suitable reducing gas and then injecting the reducing gas through one or more of said zones. The particular zone or zones actually used will be determined by temperature of the combustion effluen? gas in the immediate vicinity thereof. Similarly, the exact composition of the reducing gas employed will be determined by the same temperature.