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.

Abstract: A method and firing equipment for burning solid, liquid, or gaseous fuels, especially pulverized coal. The method includes the steps of tangentially introducing main fuel via main burners into a combustion chamber, where the fuel is burned, introducing reducing fuel via reduction burners into the combustion chamber to reduce the nitrogen oxides produced during the combustion of the main fuel, with the reducing fuel being burned under partial stoichiometric conditions, and, to ensure the burning-out of the fuel introduced into the combustion chamber, introducing burn-air above the feed of the main fuel and the reducing fuel, with a helically rising flow being provided in the combustion chamber. The reducing fuel of a given reduction burner is mixed, at a given distance from the opening of the associated main burner, with the curved afflux leaving that main burner for helical flow about the center of the combustion chamber.

Abstract: A method of reducing the NO.sub.x content in combustion gases by introducing secondary fuel, via a liquid carrier, into the combustion chamber at a location disposed between the supply of fuel and air for the primary combustion, and the supply of secondary air for the complete combustion.