COMBUSTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a combustion device increasing a turn-down ratio while reducing NOx.

SOLUTION: A gas supply cylinder 2 whose ends are closed is disposed in a heat chamber 1 whose ends are opened so that the ends of the cylinder 2 are protruded from the ends of the chamber 1. Combustion air A is delivered through the space between the chamber 1 and the cylinder 2 toward the axial direction of the cylinder 2. A plurality of cylindrical gas nozzles 3 for spouting a fuel gas G that flows in the cylinder 2 are provided at the end of the peripheral wall of the cylinder 2 so as to be protruded from the peripheral wall and scattered in the circumferential direction. An auxiliary air supply part 12 for supplying combustion air A to the fuel gas G spouted from the nozzles 3 is provided in the state where the combustion air A is supplied in a quantity smaller than that of the combustion air A discharged through the heat cylinder 1 and the cylinder 2.

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