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AssigneeABB Research Ltd.
InventorsFranz Joos, Tino-Martin Marling, Peter Senior
Estimating the term…
A method and device for operating a combined burner for liquid and gaseous fuels for the purpose of generating hot gases functions to raise the lean stability limit of the gas flame without impairing the atomization of the liquid fuel and improve the regulating range of the burner. According to the invention, this is achieved when the inflow rate and/or swirl of the blast air (5) into the inner burner space (16) is controlled. To this end, the blast air (5), during operation with gaseous fuel (6), is throttled back by injection of pilot fuel into the blast air, and additionally swirled by swirl generators in the burner. In addition, active regulation of the blast air inflow rate is effected at the burner inlet during the use of both gaseous fuel and liquid fuel.
A method of operating a double-cone burner having an inner burner space for selectable operation with a liquid and a gaseous fuel, the burner including means for introducing a liquid and a gaseous fuel and combustion air into inner burner space, the method comprising the steps of:
A double cone type burner for selectable operation with a liquid fuel and a gaseous fuel, comprising:
The device as claimed in clam 20, wherein the controlling means is a rotatably mounted sleeve having at least one recess corresponding to the at least one the feed opening for the blast air.
Dependencies are inferred from the claim text.