Method and device for distributing fuel in a burner suitable for both liquid and gaseous fuels

摘要

In order to improve the combustion of the liquid fuel (4) in such a burner (1) without influencing that of the gaseous fuel (7), the liquid fuel (4) is directed at high flow and swirl velocity into the settling chamber (13) of the airblast nozzle (2). Then the flow and swirl velocity is reduced and a thin fluid film is formed on the prefilming lip (15). The blast air (15) is directed with a quantity ratio of less than 1:1 to the liquid fuel (4) into the airblast nozzle (2) and separates small fuel droplets at the tip (27) of the prefilming lip (15). In a double-cone burner (1), the combustion mixture (28) is injected against the swirl of its main air flow (8) and at a spray angle (26) of less than or equal to 30 DEG .