BURNER DEVICE

PURPOSE:To obviate the need for a large installation area and reduce the investment cost by providing vanes constituting an impeller in a fuel gas feed pipe disposed concentrically in an air duct having openings on its opposite ends to feed a predetermined amount of combustion air. CONSTITUTION:When a fuel gas feed pipe 3 is rotated by means of a rotary drive source 8, vanes 4 are rotated so that the air is admitted from an opening 2a located upstream of an air duct 1 to send it to an opening 2b on the downstream side, while fuel gas is fed into the pipe 3 via a fuel gas inlet 11 from a fuel gas feed member 10 to be blown off form a fuel gas blow section 5 into the duct 1. In this manner, the air fed by the vanes 4 is mixed with the fuel gas from the section 5 to effect combustion and high temperature combustion gas flows out of the openings 2b as a hot gas flow. The amount of the air fed into the duct 1 by means of the vanes 4 can be increased or decreased by changing number of revolution of the pipe 3 by means of the source 8. As a result, a blower and an air feed pipe connecting the blower and the air duct are not required, with the result that a large installation area is not needed and thereby the investment cost can be reduced.