BURNER WITH TORCH IGNITION MECHANISM AND OPERATION METHOD THEREOF

In a burner 1 of an embodiment, a torch part 10 includes: a torch combustor liner 35 that is provided in a torch part casing and burns a fuel and an oxidant; a torch fuel supply part 25 that supplies a fuel; a torch oxidant supply part 20 that supplies an oxidant; an ignition device that ignites a fuel-air mixture; and a combustion gas pipe 40 that is arranged at the center of the torch part 10 and leads a combustion gas in the torch combustor liner 35 to one end side of the torch part 10. Amain fuel-main oxidant supply part 90 includes: a main fuel supply passage 100 formed in an annular shape on an outer periphery of the torch part 10; and a main oxidant supply passage 110 formed in an annular shape on an outer periphery of the main fuel supply passage 100.