PLANT, COMBUSTION APPARATUS, AND METHOD FOR REDUCTION OF NOx EMISSIONS
OwnerMitchell B. COHEN, Todd D. Hellewellinventors
Life of this patent
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Abstract
A combustion apparatus includes a combustion chamber having multiple combustion zones. A first wind box is in communication with the first combustion zone to feed the fuel to be fed into the combustion chamber for initial combustion of the fuel within the first combustion zone. A second wind box has a reburner in communication with the second combustion zone. The reburner is configured to feed fuel, a reagent and a first portion of the flue gas to be recycled to the second combustion zone into the second combustion zone to reduce nitrogen oxide emissions of the apparatus. A third wind box is in communication with the third combustion zone to feed air to the third combustion zone to complete the combustion process.
Claims20
A combustion apparatus, comprising:
- a combustion chamber having multiple combustion zones for combustion of fuel, the combustion zones including a first combustion zone, a second combustion zone, and a third combustion zone wherein the second combustion zone is located between the first and third combustion zones, the combustion chamber having at least one outlet configured to emit flue gas formed from combustion of the fuel in the combustion chamber;
- a first wind box in communication with the first combustion zone for feeding of fuel into the combustion chamber for initial combustion within the first combustion zone;
- a second wind box in communication with second combustion zone to feed a first gas having oxygen into the second combustion zone;
- a third wind box in communication with the third combustion zone to feed a second gas having oxygen into the third combustion zone;
- and
- a conduit in communication with the second combustion zone to feed a reagent into the second combustion zone.
A method of operating a combustion apparatus having a combustion chamber including a first combustion zone, a second combustion zone, and a third combustion zone wherein the second combustion zone is located between the first and third combustion zones;
- the method comprising:
- providing a first fuel into the first combustion zone of the combustion chamber;
- providing a reagent and a first gas having oxygen to the second combustion zone of the combustion chamber;
- and
- providing a second gas having oxygen to the third combustion zone of the combustion chamber.
Dependencies are inferred from the claim text.