ROTARY BURNER

PROBLEM TO BE SOLVED: To suppress adherence of soot to a ceiling surface of a cap covering an outer periphery of a rotary scattering cup while expediting secondary combustion by supplying secondary air from interior and exterior of a flame. SOLUTION: The rotary burner comprises a cylindrical burner body 18 with a bottom having an air supply port 15 provided at a bottom wall 18A and outer secondary air supply ports 16, 17 provided at a peripheral wall, a rotary shaft 12A inserted into the body 18 via the port 15, a rotary scattering cup 20 mounted at its ceiling surface 20B at an end of the shaft 12A to scatter liquid fuel supplied from a fuel supply tube 31 by a shaking-off unit 20A, a cap 36 mounted at its ceiling surface at an end of the shaft 12A to cover an outer periphery of the cup 20 except the unit 20A, and an igniter 21 disposed at a fuel scattering position of the cup 20. An inner secondary air hole 38 for injecting the air from the port 15 forward of a front surface of the cap 36 as inner secondary air is provided at the ceiling surface of the cap 36.