Reduction of nitric oxide emissions from a combustor

Details Reduction of nitric oxide emissions from a combustor Reduction of nitric oxide emissions from a combustor

1977-09-08

1980-05-27

Garrett, Robert E.

Power plants

Combustion products used as motive fluid

60733, 60746, F02C 722

Patent

active

042044022

ABSTRACT:
A turbojet combustor and method for controlling nitric oxide emissions is provided by employing successive combustion zones wherein after combustion of an initial portion of the fuel in a primary combustion zone, the combustion products of the primary zone are combined with the remaining portion of fuel and additional plenum air and burned in a secondary combustion zone under conditions that result in low nitric oxide emissions. Low nitric oxide emissions are achieved by a novel turbojet combustor arrangement which provides flame stability by allowing stable combustion, which usually result in large emissions of nitric oxide in a primary combustion zone, to be accompanied by low nitric oxide emissions resulting from controlled fuel-lean combustion, ignited by the emission products from the primary zone, in a secondary combustion zone at a lower combustion temperature resulting in low emissions of nitric oxide.

REFERENCES:
patent: 3729285 (1973-04-01), Schwedersky
patent: 3730668 (1973-05-01), Iida et al.
patent: 3746498 (1973-07-01), Stengel
patent: 3788065 (1974-01-01), Markowski
patent: 3872664 (1975-03-01), Lohmann et al.
patent: 3925002 (1975-12-01), Verdouw
patent: 3946553 (1976-03-01), Roberts
patent: 4062182 (1977-12-01), Fehler et al.

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