PROBLEM TO BE SOLVED: To enhance gasification efficiency of a gasification furnace, and to prevent fluidity deterioration of unreacted particles caused by steam condensed by a temperature drop of a take-out tube for taking out the unreacted particles separated by a particle separator.;SOLUTION: A circulation-type fluidized-bed gasification furnace includes a gasification furnace 1 where a fluidized bed 5 of a fluid medium 4 is formed by steam 3 and a raw material 2 is gasified in the fluidized bed 5 to form a gasified gas 6 and inflammable solids 7, a combustion furnace 8 that receives the fluid medium and inflammable solids of the gasification furnace through an overflow pipe 9 and burns the inflammable solids to heat the fluid medium, a medium separator 16 for separating the fluid medium from a combustion gas 14 of the combustion furnace to supply the fluid medium to the gasification furnace, sealing means 10 that is installed in the overflow pipe 9 and forms a particle holding part A to inhibit gas movement between the gasification furnace and combustion furnace, and a particle separator 24 that receives the gasified gas of the gasification furnace to separate unreacted particles 25. A take-out tube 26 for taking out the unreacted particles 25 separated by the particle separator 24 is connected to the particle holding part A of the sealing means 10.;COPYRIGHT: (C)2014,JPO&INPIT
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