DUAL BUBBLING-FLUIDIZED-BED INDIRECT GASIFIER

摘要

The present invention relates to an indirect gasifier with a dual bubbling fluidized bed. The indirect gasifier comprises: a first bubbling fluidized bed reactor (100) including a gasification area (110) in which materials to be gasified are fed and gasified to be discharged as a synthetic gas; and a second bubbling fluidized bed reactor (200) that is installed adjacent to the first bubbling fluidized bed reactor (100) with a wall (300) therebetween and includes a combustion area (210) in which materials to be combusted are fed and combusted to be discharged as a combusted gas. A fluid sand transferring device (400) is installed on the wall (300) so as to move the gasification area (110) and combustion area (210), so that heat that is generated during combustion in the combustion area (210) is transferred to the gasification area (110). According to the configuration of the present invention, fluid sand is circulated by being horizontally moved in two bubbling fluidized bed reaction areas so that heat that is generated during combustion is transferred to the gasification area (110) and raw materials, which are fed in the indirect gasifier, are gasified. Fluid sand can be horizontally circulated so that the indirect gasifier can be stably and easily operated.