Method for starting up pressurized fluidized bed incinerator system

A method for starting up a pressurized fluidized bed incinerator system including a pressurized fluidized bed incinerator for burning a material to be treated having a water-containing organic substance with silica sand as a bed material filled up in a bottom portion of the pressurized fluidized bed incinerator, a turbocharger having a turbine rotated by a flue gas discharged from the pressurized fluidized bed incinerator and a compressor rotated according to the rotation of the turbine to supply a compressed air as a combustion air to the pressurized fluidized bed incinerator, a start-up blower for supplying the combustion air to the pressurized fluidized bed incinerator, and a heating unit for heating inside the pressurized fluidized bed incinerator, the method comprising:

• supplying the combustion air to the pressurized fluidized bed incinerator by driving the start-up blower;
• increasing a temperature of a freeboard of the pressurized fluidized bed incinerator by heating the silica sand as the bed material using the heating unit;
• increasing the amount of the flue gas by feeding the material to be treated to the pressurized fluidized bed incinerator after the temperature of the freeboard is increased to 750 to 900° C.;
• and
• supplying the combustion air to the pressurized fluidized bed incinerator by driving the turbocharger with the flue gas and after that, stopping the operation of the start-up blower.