燃煤过程中微细颗粒生成机理及其模拟研究的进展  

A Review of Mechanics and Models of Fine Particles Formation During Pulverized Coal Combustion

作　　者：张丰豪[1] 柳朝晖[1] 黎春梅[1] 耿 李瑞霞[1] 郑楚光[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《燃烧科学与技术》2006年第6期507-513,共7页Journal of Combustion Science and Technology

基　　金：国家重点基础研究发展规划(973)资助项目(2002CB211602)

摘　　要：燃煤过程中产生的飞灰颗粒呈现出双峰状的尺寸分布,其中的微细颗粒因其表面富含有毒痕量元素且不易捕集,对人类健康造成极大危害,故受到广泛关注.研究表明,微细颗粒是通过煤中无机难熔矿物的还原蒸发、成核、凝结以及凝并等过程产生并长大的.针对煤中的主要无机矿物元素,系统地论述了微细颗粒形成的各个过程以及各过程子模型的建立,在深入理解微细颗粒生成机理的基础上提出了进一步的研究方向.Field and laboratory studies have demonstrated that ash generated during pulverized coal combustion is hi-modally distributed with respect to particle size. Fine particles have caused increasingly attention as their negative influence on people＇ s health as most of the trace toxic components deposit on the surfaces of the fine particles. Studies show that fine particles are formed by the deoxidization and vaporization of refractory inorganic elements followed hy nucleation, condensation, and coagulation. This paper systematically introduces each process of fine particles formation and the models formed formerly, and in the end of the paper some recommendations of the future research are given.

关 键 词：煤 微细颗粒 蒸发 成核 数值模拟 

分 类 号：TK16[动力工程及工程热物理—热能工程]