煤粉富氧燃烧特性及动力学分析  

Combustion Characteristics and Kinetics of Pulverized Coal in Oxygen-Enriched Environments

作　　者：张建良[1] 王广伟[1] 邢相栋[1] 庞清海[1] 邵久刚[1] 任山[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁研究学报》2013年第4期9-14,共6页Journal of Iron and Steel Research

基　　金："十二五"国家科技支撑计划资助项目(2011BAC01B02)

摘　　要：利用热分析法研究了富氧条件下高炉喷吹煤粉的燃烧特性。结果表明,富氧气氛可以改善煤粉燃烧特性,使煤粉着火点、失重峰提前,失重峰值增大,燃尽温度降低,综合燃烧特性指数明显提高,燃烧特性得到改善。当氧的体积分数小于40%时,煤粉燃烧特性改善幅度较大;氧的体积分数大于40%时,煤粉燃烧特性改善趋势变缓。同时采用非等温模型Flynn-Wall-Ozawa(FWO)对富氧之后煤粉燃烧过程进行动力学分析,当氧的体积分数由21%增加到100%,煤粉燃烧活化能从95.15kJ.mol-1增加到169.99kJ.mol-1。Combustion characteristic of pulverized coal injection （PCI） under different oxygen rates were investiga- ted with thermal analysis device. It is shown in the result that combustion characteristic of PC are different from different oxygen rate. Ignition point is lower, initial and maximum weight loss peaks are achieved at relatively lower temperature. Meanwhile, combustion characteristic index are enhanced. The improvement in combustion of PC is more significant when volume fraction of oxygen is under 40%, the trend of which is slower above 40% vol- ume fraction of oxygen. Kinetic calculation was carried out from 21 % to 100 % oxygen volume fraction with Flynn- Wall-Ozawa （FWO） model. The results show that activation energy of PC is improved from 95.15 kJ·mol^-1 to 169.99 kJ·mol^-1 with the increase of oxygen.

关 键 词：煤粉 富氧 燃烧特性 动力学 

分 类 号：TK16[动力工程及工程热物理—热能工程]