抄録
Recently, high-temperature and high-pressure coal gasification combined cycle systems have been under developed to realize more efficient and ecological coal utilization technologies. In the gasification process, however, slugging and fouling troubles sometimes occur in the section of furnace wall and heat exchanger, respectively, since the operating temperature exceeds the ash melting temperature. Therefore, it is necessary to predict ash behaviors in the gasification process, based on the properties of mineral particles in the raw coals. Objective of this study is to elucidate the formation behaviors of ash particles and deposition characteristic during coal gasification. The experiments were conducted, using a horizontal high-temperature pulverized coal reactor. Ash particles in the reacting particles sampled during reaction were analyzed, using a Computer Controlled Scanning Electron Microscope (CCSEM).
