Patent ID: 9103547
Filing Date: 2015-08-11
Classification: F23C,F23D,F23R

Abstract:
1. A method for operating a burner, comprising: providing a burner comprising a swirl generator which forms a swirl flow of a combustion air stream, the swirl generator being upstream of a mixing zone in which, within a first transitional portion, a flow guide is arranged and extends in a flow direction and transfers the swirl flow formed in the swirl generator into a mixing pipe downstream of the flow guide, a device for injecting a liquid and/or gaseous fuel into the combustion air stream being present in the swirl generator, and a fuel/air mixture thus obtained being ignited and burnt in a combustion chamber downstream of the mixing zone, at the same time forming a recirculation flow in the form of a backflow bubble in the combustion chamber; and introducing a gaseous fuel containing hydrogen or consisting of hydrogen within the flow guide and/or downstream of the flow guide into a flow of the fuel/air mixture, with a tangential component oriented in a swirl direction of fuel/air swirl flow and with a radial component oriented longitudinally with respect to an axis of the burner, in such a way that a flow irritation disturbance of the fuel/air swirl flow is minimized, wherein the fuel containing hydrogen or consisting of hydrogen is fed into the first transitional portion with a flow impulse which corresponds to the flow impulse of the fuel/air swirl flow propagating along the first transitional portion, and wherein the fuel is injected corresponding to local flow angles within the flow guide.