Method for operating a corner burner for a tangential burner system and

Abstract

In a method for operating a corner burner of a tangential burner system, at least a first air stream of coal dust and primary air is tangentially introduced to a imaginary horizontal circle in the combustion chamber of the tangential burner system via a nozzle of the corner burner. An additional air stream is introduced into the combustion chamber in a direction toward a chamber wall of the combustion chamber at an adjustable offset angle relative to the first air stream. The offset angle can be adjusted by providing the additional air stream as mixed air stream of at least two partial air streams of different adjustable flow velocity. A first partial air stream within the nozzle flows straight into the outlet opening of the nozzle, and the second partial air stream flows angularly into the first partial air stream upstream of the outlet opening. The nozzle has a mixing chamber arranged upstream of the outlet opening. The mixing chamber has a slanted wall and a parallel wall such that the mixing chamber widens in the direction away from the outlet opening. At least two air inlet channels are connected to the mixing chamber remote from the outlet opening. A first air inlet channel is arranged such that a first partial stream air exiting from the first inlet channel flows straight into the outlet opening and a second air inlet channel is arranged such that a second partial air stream exiting from the second air inlet channel is directed onto the slanted wall and deflected at the slanted wall into the first partial air stream. The flow velocity of the first and second partial air streams is adjustable.