Premix burner

Details Premix burner Premix burner

1996-11-06

1998-08-11

Dority, Carroll B.

Combustion

Separately supplied or controlled, physically related flame...

Coaxial

431285, 431175, 431183, 431354, F23Q 900

Patent

active

057918929

ABSTRACT:
In a premix burner for the combustion of gaseous and/or liquid fuel, in which the fuel is injected as secondary flow into a gaseous, ducted main flow, the premix duct (20) through which flow occurs being annular and being defined by an inner (21a) and an outer cylinder wall (21b), and the main flow being guided via vortex generators (9, 9a) which generate longitudinal vortices without a recirculation area and of which a plurality are arranged next to one another over the periphery of the annular duct (20) on at least one duct wall (21), and means for injecting fuel being arranged directly downstream of the vortex generators (9, 9a) on the inner and/or outer duct wall (21a, 21b), the vortex generators (9, 9a) generate such vortices which leave behind a residual vortex after the complete mixing of the fuel with the air of the fuel/air mixture flow. In this case, the annular main flow duct (20) of constant height (H) has a length (L) downstream of the vortex generators (9) and the fuel injection which is in the region of 5 to 20 times its height (H). It subsequently widens to form a circular main flow duct.

REFERENCES:
patent: 3958416 (1976-05-01), Hammond, Jr. et al.
patent: 4094625 (1978-06-01), Wang et al.
patent: 4701124 (1987-10-01), Maghan et al.
patent: 5518395 (1996-05-01), Maughan

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