High-heat transfer low-NO x combustion system

Details High-heat transfer low-NO x combustion system High-heat transfer low-NO x combustion system

2005-09-06

2005-09-06

Basichas, Alfred (Department: 3749)

Combustion

Flame holder having protective flame enclosing or flame...

Including means feeding air axially spaced points of the flame

C431S352000, C431S187000, C431S008000

Reexamination Certificate

active

06939130

ABSTRACT:
A combustion apparatus comprising a pre-combustor stage and a primary combustion stage, the pre-combustor stage having two co-axial cylinders, one for oxidant and one for fuel gas, in which the fuel gas is preheated and the primary combustion stage having rectangular co-axial passages through which fuel and oxidant are admitted into a refractory burner block. Both passages converge in the vertical plane and diverge in the horizontal plane. The passage through the refractory burner block also has a rectangular profile and diverges in the horizontal plane. The outlets to the primary combustion stage are recessed in the refractory burner block at a distance which may be varied.

REFERENCES:
patent: 4488866 (1984-12-01), Schirmer et al.
patent: 4761132 (1988-08-01), Khinkis
patent: 4909727 (1990-03-01), Khinkis
patent: 5545031 (1996-08-01), Joshi et al.
patent: 5725366 (1998-03-01), Khinkis et al.
patent: 6663380 (2003-12-01), Rabovitser et al.
patent: 6702571 (2004-03-01), Abbasi et al.

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