摘要
基于已有的动力学数据对单颗粒黄铁矿迁移转化进行了全过程模拟,分析讨论了各种因素对黄铁矿氧化过程和S释放率的影响,结果表明:随着颗粒尺寸的减小和炉膛温度的升高,黄铁矿颗粒的分解氧化过程加快,颗粒在炉内停留很短时间内温度即升高到共融点以上,使颗粒呈混熔态,进而导致灰沉积、结渣。颗粒氧化过程中S的释放主要受扩散控制,其释放速率与颗粒粒径成反比,与氧气浓度和炉膛温度成正比。
A kinetic model for describing single pyrite partition during coal combustion is developed. The influence factors on pyrite oxidation and sulfur release are also discussed. The results show that the decomposition and oxidation process of pyrite are accelerated with the decrease of particle size and increasing temperature. Pyrite particle can rise to the eutectic point in a shot time in furnace, then melt and resulting ash deposition. The release of sulfur during pyrite oxidation is governed by the diffusion resistances. The sulfur release rate is increased with the increasing of oxygen content and furnace temperature, but is inversely proportional to the particle size.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第6期1050-1052,共3页
Journal of Engineering Thermophysics
基金
国家自然科学(No.40672098)
国家重点基础研究发展规划项目(No.2002CB211602)
