Patent ID: 8714095

Claim:
A device for controlling a bed height of a fluidized bed gasification furnace in a gasification facility comprising a gasification furnace having a fluidized bed of a fluid medium formed with steam to gasify a charged raw material for production of a gasification gas and a combustible solid, a combustion furnace into which the combustible solid produced by said gasification furnace is introduced along with the fluid medium to form a fluidized bed with a fluidizing gas to burn the combustible solid, and a medium separator for separating the fluid medium from a combustion exhaust gas introduced from the combustion furnace to supply the separated fluid medium to the gasification furnace, the device comprising: a plurality of fluid medium extraction ports connected to the gasification furnace at vertical intervals; and a fluid medium extraction switching means for guiding and extracting the fluid medium in the gasification furnace to and through any one of the fluid medium extraction ports.