Flame stabilizing/NO.sub.x reduction device for pulverized coal

Details Flame stabilizing/NO.sub.x reduction device for pulverized coal Flame stabilizing/NO.sub.x reduction device for pulverized coal

1986-01-27

1987-03-31

Focarino, Margaret A.

Combustion

Mixer and flame holder

110263, 110347, F23D 1462, F23D 100

Patent

active

046540016

ABSTRACT:
A combustion method and burner nozzle system having a DeNO.sub.x Stabilizer concentrically secured within a burner nozzle such that the fuel stream is separated into an outer fuel-rich stream and an inner fuel-lean stream. The outer fuel-rich stream passes around the exterior of the DeNO.sub.x Stabilizer where its flow area is increased thereby decreasing its velocity before it is discharged from the burner nozzle. Concurrently, the inner fuel-lean stream passes through the DeNO.sub.x Stabilizer where its flow area is reduced thereby increasing its velocity before this stream is discharged from the burner nozzle central to the slower fuel-rich stream. Mixing members interior of the burner nozzle further mix the fuel-rich stream before exiting the nozzle.

REFERENCES:
patent: 4057021 (1977-11-01), Schoppe
patent: 4270895 (1981-06-01), Vatsky
patent: 4274343 (1981-06-01), Kokkinos
patent: 4448135 (1984-05-01), Dougan et al.
patent: 4457241 (1984-07-01), Itse et al.
patent: 4471703 (1984-09-01), Vatsky et al.
patent: 4611543 (1986-09-01), Collette

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