Combustion control for producing low NO.sub.x emissions through

Details Combustion control for producing low NO.sub.x emissions through Combustion control for producing low NO.sub.x emissions through

1994-04-12

1996-01-30

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 39281, F02C 928

Patent

active

054872669

ABSTRACT:
Combustion in a gas turbine is controlled through use of flame spectroscopy in order to achieve low NO.sub.x emissions in the exhaust. By detecting and monitoring the combustion flame in the turbine to determine intensity of ultraviolet spectral lines, and dynamically adjusting the fuel/air ratio of the fuel mixture such that this intensity remains below a predetermined level associated with a desired low level of NO.sub.x emissions, the engine produces significantly reduced NO.sub.x emissions in its exhaust but at a sufficiently high combustion flame temperature to avoid any undue risk of flame-out, thereby assuring stable, safe and reliable operation.

REFERENCES:
patent: 5024055 (1991-06-01), Sato et al.
patent: 5148667 (1992-09-01), Morey
patent: 5257496 (1993-11-01), Brown et al.
"Rosemount Optical Light-Off Detector for Stationary Turbine Engines", Rosemount Inc. Catalog, Rosemount Inc., Aerospace Division, 1256 Trapp Road, Eagan, Minn. 55121, Feb. 1992.
F. Frain, "Research into a Spectral Flame Analyzer Phase 1--Final Report for the Period Apr. 21, 1983-Jun. 30, 1985", Work Performed under United States Department of Energy Contract DE-AC07-831D12463; Jun. 1, 1985.
Brown et al., "Silicon Carbide UV Photodiodes", IEEE Transactions on Electron Devices, vol. 40, No. 2, Feb. 1993, pp. 325-333.

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