1단 분류층 석탄 가스화기의 전산수치해석 : 작동조건과 주입 노즐의 각도변화에 따른 영향

Coal gasification is heading for a great future as one of the most renewable energy sources, which can produce not only electricity and heat, but also gaseous and liquid fuels from the synthesis. The work focuses on entrained flow gasification, especially Integrated coal Gasification Combined Cycle(IGCC) plant which is commercially available on a large scale plant. As constructing an IGCC plant is considerably complicated and expensive compared with a pulverized-coal power plant, it is important to determine optimum design factors and operating conditions using a computational fluid dynamics (CFD) model. In this study, we calculated various operation conditions and swirl injections : oxygen to coal ratios(0.66-1.08), steam to coal ratios(0.003-0.075), coal particle sizes(50-300㎛), and injection angles(0-6˚, clockwise). The results of numerical calculations show that O₂/Coal ratio, 0.83, Steam/Coal ratio, 0.05, coal particle diameter, 100㎛, injection angle, 4˚-6˚, are the most optimum in this research.