油页岩颗粒燃烧的高温段多相燃烧模型  

Heterogeneous combustion model for the high-temperature stage of oil shale particle combustion

作　　者：韩向新[1] 姜秀民[1] 崔志刚[1] 

机构地区：[1]上海交通大学机械与动力工程学院热能工程研究所,上海200240

出　　处：《哈尔滨工业大学学报》2007年第9期1470-1472,共3页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(50476021)

摘　　要：油页岩的燃烧过程是复杂的.基于热重燃烧曲线,可将油页岩的燃烧过程分为低温阶段、过渡阶段和高温阶段3部分:低温阶段为均相燃烧,高温阶段为多相燃烧,而过渡阶段则为高温阶段的多相燃烧准备条件.本文建立了高温段的多相燃烧模型:在能量方程中耦合了颗粒与外界环境之间的对流和辐射换热;低温阶段挥发分的大量释放使得油页岩内部孔隙增大,因而考虑了颗粒内表面积对碳的燃烧反应速率的影响;同时也考虑了挥发分和固定碳的燃烧对油页岩固体颗粒密度的影响.模型的计算结果与实验数据相吻合.Combustion process of oil shale is complex. Based on thermogravimetric combustion curves, whole combustion process of oil shale is divided into three steps： low-temperature stage with homogeneous combustion, high-temperature stage with heterogeneous combustion, and transitional combustion stage preparing for the heterogeneous combustion. A new mathematical model is developed for the heterogeneous combustion： convective and radiative heat transfer between particle and ambient are included in energy equation; the effect of inner surface area on combustion reaction rate is considered ; the influence of volatile and fixed carbon combustion on particle density has been considered in the model as well. At last, the model is validated by thermogravimetric experimental data.

关 键 词：油页岩 高温段 多相燃烧 燃烧模型 

分 类 号：TK16[动力工程及工程热物理—热能工程]