PREMIX BURNER COMPRISING A STEPPED LIQUID FUEL SUPPLY SYSTEM, AND METHOD FOR OPERATING A PREMIX BURNER

摘要

The invention relates to a premix burner provided with a stepped liquid fuel supply system. Said burner comprises at least two partially conical shells (2, 3) that are radially arranged in a partially overlapping manner and define an axially conically extending turbulence chamber (1), the central axes of said shells extending in a staggered manner and the mutually overlapping shell regions thereof respectively enclosing an air inlet vent (4, 5) extending tangentially in relation to the turbulence chamber (1). The inventive burner also comprises a lance (14) which axially protrudes into the turbulence chamber (1) and is provided with means (13) for feeding liquid fuel into the turbulence chamber (1), and other means (11) which are used to feed liquid fuel and are provided in the region of the air inlet vents (4, 5). The invention is characterised in that the other means (11) for feeding liquid fuel are embodied and arranged along at least one air inlet vent (4, 5), in such a way that the liquid fuel delivery conditioned by the other means (11) is carried out in the form of a fuel spray diffusing perpendicularly to the tangential longitudinal extension of the air inlet vent (4, 5), and perpendicularly to an air flow directed through the air inlet vent (4, 5).