Substoichiometric fuel firing for minimum NO.sub.x emissions

Details Substoichiometric fuel firing for minimum NO.sub.x emissions Substoichiometric fuel firing for minimum NO.sub.x emissions

1989-02-24

1989-11-07

Green, Randall L.

Combustion

Process of combustion or burner operation

Flame shaping, or distributing components in combustion zone

431 75, 423235, F23M 304

Patent

active

048788309

ABSTRACT:
Disclosed is a method for combusting hydrocarbonaceous fuels such that minimal amounts of NO.sub.x are produced. This is accomplished by combusting the fuel in a first stage at substoichiometric conditions followed by a second stage combustion at conditions to complete combustion wherein the temperature of the combustion gases exiting the first stage is specifically controlled by a heat transfer device so that they are at least 500.degree. F. lower than the combustion temperature of the first stage but not lower than the ignition temperature of the combustion gases exiting the heat transfer device.

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patent: 4405587 (1983-09-01), McGill et al.
Application of NO.sub.x Control Techniques to Industrial Boilers, M. P. Heap et al., AIChE Symposium Series, No. 175, vol. 74, pp. 115-125, 1978.
Controlling Nitrogen Oxides, Research Seminar, EPA-600/8-80-004, Feb. 1980.
Combustion, 2nd Edition, Irvin Glassman, Academic Press, Inc., 1987.

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