Nitrogen oxide reduction by gaseous fuel injection in low temper

Details Nitrogen oxide reduction by gaseous fuel injection in low temper Nitrogen oxide reduction by gaseous fuel injection in low temper

1997-08-08

1999-06-01

Lazarus, Ira S.

Furnaces

Process

Treating fuel constituent or combustion product

110210, 110212, 110214, 110262, 110263, 110344, 110345, 110347, 110348, 431 2, 431 5, F23J 1100, F23D 100, F23L 100, F23B 500

Patent

active

059080035

ABSTRACT:
A process and apparatus for combustion of a solid carbonaceous material, for example coal, in which a mixture of the solid carbonaceous material and combustion air is injected into a combustion chamber and ignited, thereby forming a fuel-lean primary combustion zone. A gaseous fuel is injected into the combustion chamber in a region downstream of the primary combustion zone, thereby forming a fuel-lean secondary combustion zone. Temperature in the secondary combustion zone is in the range of about 1800.degree. F. to 2400.degree. F.

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