Head start partial premixing for reducing oxides of nitrogen emi

Details Head start partial premixing for reducing oxides of nitrogen emi Head start partial premixing for reducing oxides of nitrogen emi

1991-12-23

1993-09-28

Bertsch, Richard A.

Power plants

Combustion products used as motive fluid

Combustion products generator

60734, F02C 100

Patent

active

052477975

ABSTRACT:
Reducing NO.sub.x emission levels from a gas turbine combustor having a premixer section by mixing a small portion of air into the fuel prior to injection into the premixer section. The portion of diverted air is approximately five percent of the total amount of air injected into the premixer section or such that the resulting fuel-air mixture in the fuel line is approximately half fuel and half air. The injection of air into the fuel line, referred to as "head start partial premixing," is effective to reduce the fluctuations and nonuniformities in the fuel concentration levels which increase NO.sub.x output.

REFERENCES:
patent: 3743258 (1973-07-01), Florentine
patent: 3940460 (1976-02-01), Graybill
patent: 3942493 (1976-03-01), Linder et al.
patent: 4010723 (1977-03-01), Suzuki et al.
patent: 4090485 (1978-05-01), LaCreta
patent: 4223615 (1980-09-01), Breen et al.
patent: 4320731 (1982-03-01), Braun et al.

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