| abstract |
A tubular flame burner, and a method and a device for controlling combustion are disclosed. The tubular flame burner has a tubular combustion chamber whose one end is opened, and a fuel injection nozzle and an oxygen-containing gas injection nozzle of which each nozzle opening are opened at an inner face of the combustion chamber, and injection directions of both fuel injection nozzle and oxygen-containing gas injection nozzle substantially correspond to a tangential direction of an inner peripheral face of the combustion chamber. An igniting device is at the position corresponding to r/2 (r: combustion chamber radius) from a tube axis of the combustion chamber. The combustion chamber is structured from an inner tube and an outer periphery that slides along the outer peripheral face of the inner tube. The length of the combustion chamber is adjustable, the burner is structured as a multiple step-type burner using plural tubular burners, and a gas passage formed by a gap between the inner tube and an outer tube. In the method for controlling combustion of the tubular flame burner, an opening/closing valve is controlled for opening and closing by the device for controlling combustion so that injection speed of each nozzle is, depending on combustion load, a value in a preset range. |