焦炭颗粒在不同控制区域中的燃烧特性  

Combustion Characteristics of Char Particles in Different Controlling Regions

作　　者：陈明磊[1] 李保卫[1] 武文斐[1] 

机构地区：[1]内蒙古科技大学、内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室省部共建国家重点实验室培养基地,内蒙古包头014010

出　　处：《过程工程学报》2014年第2期291-295,共5页The Chinese Journal of Process Engineering

基　　金：重大基础研究前期研究专项基金资助项目(编号:2005CCA00600);内蒙古自治区自然科学基金重大项目(编号:20080404ZD07)

摘　　要：针对焦炭颗粒在煤粉炉内的复杂燃烧过程,建立相互耦合的导热、气相传质模型及改进的随机孔模型.通过FORTRAN编程,研究了焦炭颗粒在不同控制区域中的燃烧特性,应用改进的随机孔模型,研究了焦炭颗粒在扩散-化学反应动力学控制区中的燃烧特性.结果表明,在扩散-化学反应动力学控制区,碳基上的小孔内部存在O2浓度梯度,焦炭颗粒的转化速率在转化率约为0.39时出现最大值,随燃烧过程进行先增大后减小.For the complex combustion of char particles in a pulverized coal furnace, mutually coupled thermal models of the gas phase mass and heat transfer and the improved random pore model were set up. The combustion characteristics of char particles in different controlling regions were studied by programming with FORTRAN. The combustion characteristics in the diffusion-chemical reaction kinetics controlling region were analyzed with improved random pore model. The results show that in the diffusion-chemical reaction kinetics controlling region, the micro-pore on the carbon matrix had the O2 concentration gradient, when the conversion rate of char particles reached 0.39, the reaction rate of char particles had a maximum value. During the combustion process, the conversion rate of char particles increased first, and then decreased.

关 键 词：焦炭颗粒 扩散-化学反应动力学控制 燃烧特性 随机孔模型 

分 类 号：TK6[动力工程及工程热物理—生物能]