Patent ID: 6155820
Filing Date: 2000-12-05
Classification: F23C,F23D

Abstract:
A burner for preparing a fuel and air mixture for combustion in a heat generator, the burner having a fluid flow direction and comprising a swirl generator having at least two sectional bodies, each sectional body including a tangentially acting inflow duct for the inflow of a combustion-air flow, said tangentially acting inflow duct being oriented so that the flow of the combustion-air is tangent to the fluid flow of the burner, means for injecting at least one fuel into the combustion-air flow, a mixing section being arranged downstream of the swirl generator and having, inside a first part of the mixing section in the direction of the fluid flow, a plurality of transition passages for passing the fluid flow formed in the swirl generator into a mixing tube arranged downstream of these transition passages, wherein a gas fuel-directing duct running in parallel or virtually in parallel to one of said sectional bodies is arranged in fluid communication with at least one tangentially acting inflow duct, and wherein the gas fuel-directing duct ends at a distance greater than zero upstream of the combustion-air flow from the tangentially acting inflow duct into an interior space of the swirl generator.