Dual-fuel pre-mixing burner assembly

Details Dual-fuel pre-mixing burner assembly Dual-fuel pre-mixing burner assembly

1993-04-07

1994-09-13

Bertsch, Richard A.

Power plants

Combustion products used as motive fluid

Combustion products generator

60742, F23R 336

Patent

active

053457684

ABSTRACT:
The burner assembly includes a flow body 12 having a central liquid fuel injection nozzle 14, inner and outer concentric passages 24 and 26, respectively, and a flow duct comprising a venturi downstream of the liquid injection nozzle. The inner passage 24 communicates air and gaseous fuel into the flow duct 16. Swirlers 30 and 38 are provided at the exit ends of the inner and outer passages, respectively, to create counterrotating flows which form a shear layer at the exit of the burner assembly body. The extent of the flow duct 16 facilitates liquid fuel atomization and vaporization, while affording sufficient time for gaseous fuel/air pre-mixing. The arrangement creates a recirculation zone 40 and a shear layer 42 at the exhaust of the burner assembly body which affords flame stabilization.

REFERENCES:
patent: 3605405 (1971-09-01), Du Bell et al.
patent: 3853273 (1974-12-01), Bahr et al.
patent: 4194358 (1980-03-01), Stenger
patent: 4222243 (1980-09-01), Mobsby
patent: 4982570 (1991-01-01), Waslo et al.
patent: 5165241 (1992-11-01), Joshi et al.

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