Nitrogen oxide control using internally recirculated flue gas

Details Nitrogen oxide control using internally recirculated flue gas Nitrogen oxide control using internally recirculated flue gas

1991-06-24

1992-08-04

Price, Carl D.

Combustion

Combustion products return structure

Recirculation about mixing or combustion chamber wall or baffle

431 9, 431181, 431187, 431173, F23L 900

Patent

active

051353873

ABSTRACT:
An improved process and apparatus for reducing NO.sub.x content of flue gas effluent from a furnace, the improvement comprising a burner assembly having a burner and flue gas recirculating system for collecting and passing internally recirculating flue gas into a combustion zone for reaction with a combustion flame. The burner preferably has a plurality of fuel dispensing nozzles peripherally disposed about the combustion zone to aspirate collected internally recirculating flue gas into the combustion zone, and has a plurality of fluid driven eductors to drive further amounts of collected internally recirculating flue gas into the combustion zone.

REFERENCES:
patent: 4257763 (1981-03-01), Reed
patent: 4277942 (1981-07-01), Egnell et al.
patent: 4575332 (1986-03-01), Oppenberg et al.
patent: 4613299 (1986-09-01), Backheim
patent: 4708638 (1987-11-01), Brazier et al.

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