Premixed/high-velocity fuel jet low no burner

Details Premixed/high-velocity fuel jet low no burner Premixed/high-velocity fuel jet low no burner

1992-04-09

1993-04-13

Yeung, James C.

Combustion

Process of combustion or burner operation

Flame shaping, or distributing components in combustion zone

431115, 431187, 431285, F23M 300

Patent

active

052016501

ABSTRACT:
The invention is a process for combusting a gaseous fuel in a burner to result in low NO.sub.x emissions by first feeding a gaseous fuel stream and an air stream to a premixer where the fuel and air streams are mixed to form a fuel-air mixture. The fuel and air streams are fed to the premixer at a fuel to air equivalence ratio of less than 1 (i.e., fuel-lean). Second, the fuel-air mixture is passed to a combustion chamber where the fuel is substantially combusted to produce a combustion chamber jet and flue gases. The combustion chamber jet and flue gases pass into a heating zone which may include a furnace, heater, or boiler. Third, at least two high-velocity fuel streams, optionally diluted with a nonreactive thermal ballast, are passed to the heating zone contemporaneously with the second step. The high-velocity fuel streams entrain at least a portion of the flue gases. The fuel in the high-velocity fuel streams is partially combusted prior to coming into contact with the combustion chamber jet. Last, the flue gases are removed from the heating zone.

REFERENCES:
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patent: 4351632 (1982-09-01), Nagai
patent: 4388062 (1983-06-01), Bartok et al.
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patent: 4496306 (1985-01-01), Okigami et al.
patent: 4505666 (1985-03-01), Martin et al.
patent: 4533314 (1985-08-01), Herberling
patent: 4629413 (1986-12-01), Michelson
patent: 4669399 (1987-06-01), Martin et al.
patent: 4995807 (1991-02-01), Rampley et al.

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