Patent ID: 8545579

Claim:
A gasification furnace structure in a gasification facility comprising a gasification furnace which has a fluidized bed of bed material formed by vapor to gasify a raw material fed to thereby produce a gasification gas and a flammable solid content, a combustion furnace which is fed with the flammable solid content produced in the gasification furnace together with the bed material and which has a fluidized bed formed by fluidizing gas to burn said flammable solid content, and a material separator which separates the bed material from a combustion gas from the combustion furnace to feed said separated bed material to said gasification furnace, characterized in that said gasification furnace is divided into a plurality of gasification furnace units formed in rectangular parallelepipeds through which the raw and bed materials pass sequentially in a longitudinal direction extending horizontally of the rectangular parallelepipeds, each of said gasification furnace units being horizontally arranged longitudinal of said gasification furnace units, each of said gasification furnace units having an inlet on a lower portion at a longitudinally upstream end in a direction of travel of the raw and bed materials and having an outlet on an upper portion at a longitudinally downstream end in the direction of travel of the raw and bed materials, the outlet of each upstream gasification furnace unit among the gasification furnace units being connected to the inlet of the gasification furnace unit downstream thereof, said inlet of the downstream gasification furnace unit being fed with the hot bed material from said material separator, the inlet of the gasification furnace unit arranged mostupstream among the gasification furnace units is fed with the raw material and the hot bed material from said material separator, the outlet of the gasification furnace unit arranged mostdownstream among the gasification furnace units being connected to said combustion furnace.