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

1994-10-31

1996-01-02

Lazarus, Ira S.

Combustion

Timer, programmer, retarder or condition responsive control

By combustion or combustion zone sensor

F23N 508

Patent

active

054802989

ABSTRACT:
Combustion in a boiler burner is controlled through use of flame spectroscopy in order to achieve low NO.sub.x emissions in the exhaust. By monitoring the combustion flame in the boiler burner 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 boiler burner 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.

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"Research Into a Spectral Flame Analyzer Phase 1-Final Report for the Period Apr. 21, 1983-Jun. 30, 1985" by F. Frain, US Doe Contract No. DE--AC07--83 1D12463; Jun. 1, 1985.
"Silicon Carbide UV Photodiodes" by Dale M. Brown, et al, IEEE Transactions on Electron Devices, vol. 40, No. 2, Feb. 1993, pp. 325-333.

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