Abstract
Internally Circulating Fluidized-bed Gasifire (ICFG) is composed of two chambers with different specific functions in a single furnace, one is the gasification chamber and the other is the combustion chamber. In each of these chambers, there are bed materials (quartz sand, etc.) as the fluidizing medium and they are circulating between these two chambers. Gasification residue including char is transferred from gasification chamber to combustion chamber by this bed circulation. In the combustion chamber, combustion of char supplies heat to bed materials. This heated bed materials is returned to gasification chamber and supply heat needed for pyrolysis reaction. ICFG can produce high-calorific gas from low-calorific solid fuels, such as biomass and wastes that are fed into gasification chamber, because pyrolysis gas under no-oxygen and no-nitrogen and char combustion gas are separately discharged from those chambers without mixing. Thus ICFG can realize some unique gasification process.
