A FLUIDIZED BED SYSTEM IN USE WITH INDEPENDENT COMBUSTOR

摘要

The present invention relates to a fluidized bed indirect gasification system with an independent combustor which enables to obtain high quality of synthetic gas through effective indirect gasification of low grade fuels having various constellations such as biomass, waste, coal, etc. According to the present invention, the system comprises a pre-process unit having a selector (500); a gasifier (300) supplied with a first fuel selected in the pre-process unit; a combustor (100) supplied with a second fuel selected in the pre-process unit; and a riser (200) for connecting the gasifier (300) and the combustor (100) and having temperature-increasing and transporting functions of a bed material therein. According to the present invention, the system processes most impurities in the combustor since the combustor is separately provided, unlike a conventional indirect gasification system which only focuses on separation of gaseous material by separating combustion gas and synthetic gas, and separates not only gaseous material discharged from the combustor by using heat generated during combustion only for gasification, but also separates a solid material, thereby remarkably reducing operational failure by incombustible material, and at the same time, reducing impurities in the synthetic gas.