Patent ID: 6331109
Filing Date: 2001-12-18
Classification: F23C,F23D,F23R

Abstract:
A premix burner comprising:an axial throughflow direction, an upstream end, and a downstream end,a swirl generator for swirling a gaseous oxidizing medium;means for injecting at least one fuel into a swirl flow when generated by the swirl generator, the oxidizing medium flowing through the swirl generator into the premix burner when swirled by the swirl generator, said swirl generator having an axial throughflow direction, the swirl generator including and enclosing a cavity and having at least one tangential slit which runs in the axial throughflow direction and through which the oxidizing medium can flow in a tangential direction into the cavity, said cavity having a throughflow cross section, the cross-sectional area of said cavity at least partly increases toward the downstream end of the swirl generator;a carrier structure;a sudden cross-sectional increase at the downstream end of the premix burner, the premix burner being fastened at the downstream end of the premix burner to the carrier structure;a heat shield arranged downstream of the carrier structure and fastened to the carrier structure so that there is no direct contact between the carrier structure and the heat shield and there is a distance between the carrier structure and the heat shield;fastening means by which the heat shield is fastened to the carrier structure for ensuring relative displaceability between the heat shield and the carrier structure;a displacement body in the cavity, the displacement body narrowing, at least in stages, toward the downstream end of the burner.