Low NO.sub.x burners

Details Low NO.sub.x burners Low NO.sub.x burners

1982-05-17

1984-05-01

Barrett, Lee E.

Combustion

Combustion products return structure

431190, 431351, 122197, F23L 900

Patent

active

044458436

ABSTRACT:
Fired heaters, boilers and oilfield steamers include a heater radiant section adjacent a burner. A precombustion chamber is mounted between the burner and the heater radiant section and is surrounded by a combustion air plenum. A plurality of spaced tubes form a perforated combustion chamber and extend from the air plenum axially into the heater radiant section and terminate in line and in converging relationship with the exiting products of combustion. The tubes are protected by refractory members positioned along each tube in abutting end to end relationship. A plurality of openings may be spaced along each tube for progressively staging combustion air.

REFERENCES:
patent: 3146821 (1964-09-01), Wuetig
patent: 3495815 (1970-02-01), Holmes
patent: 4021188 (1977-05-01), Yamagishi et al.
patent: 4289093 (1981-09-01), Coggins et al.
patent: 4351632 (1982-09-01), Nagai

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