| 초록 |
Recently, low-grade coal has attracted tremendous attention due to abundant reserves, cheap price and stable supply. Since low-grade coal has higher moisture content than conventional bituminous coal, its moisture has to be removed to be used in conventional plants. However, there are not enough databases for drying characteristics of low-grade coal. In this study, the drying characteristics of low grade coals (moisture contents: 17.8%, 22.5%) was investigated in a pressurized micro-riser. The effect of operation conditions such as pressure (1-40bar), drying temperature (200-600oC), particle size (212-300um and 300-355um), and residence time on drying ratio was studied and analyzed in this study. |
