Reduction of nox emissions

Details Reduction of nox emissions Reduction of nox emissions

B - Operations, Transporting

01

D

B01D 53/34 (2006.01) B01D 3/00 (2006.01) B01D 53/56 (2006.01) C07D 301/19 (2006.01)

Patent

CA 2128748

REDUCTION OF NOX EMISSIONS (Docket No. 81,172 -F ) ABSTRACT OF THE DISCLOSURE A method for reducing NOX emissions in a chemical reaction process wherein ammonia is formed as a by-product of the chemical reaction, wherein the chemical reaction product is separated into desired fractions by distillation in distillation columns utilizing steam-heated reboilers, wherein the steam for use in the reboilers is generated in a steam generator comprising a wet steam generation segment and a superheated steam generation segment, wherein hot combustion gases are generated by the burning of a hydrocarbon fuel with air, whereby NOX combustion by-products are formed, wherein the hot combustion gases are channeled to provide a flowing stream of hot combustion gas that countercurrently sequential- ly flows through the superheated steam generation segment and the wet steam generation segment to a flue, and wherein the by-product ammonia is injected into the steam generator into the flowing stream of combustion gases at an injection point intermediate the superheated steam generation segment and the wet steam generation segment to thereby convert at least a portion of the NOX combustion products to molecular nitrogen and water vapor.

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