补连塔煤低温氧化特性的热重研究  

Thermogravimetric experimental study on low-temperature oxidation of coal in Bulianta mine

作　　者：魏琰荣 肖翠微 王乃继 王永英 

机构地区：[1]煤炭科学技术研究院有限公司节能工程技术研究分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室,北京100013 [3]国家能源煤炭高效利用与节能减排技术装备重点实验室,北京100013

出　　处：《洁净煤技术》2016年第1期77-81,共5页Clean Coal Technology

基　　金：煤炭科学技术研究院有限公司基础研究基金资助项目(2015JC01)

摘　　要：为研究煤粉的低温氧化特性,对实验煤样在不同升温速率和氧气体积分数条件下进行了热重实验,并利用Coats-Redfen积分法计算了不同实验条件下最大失重开始时的温度至燃点间的活化能。结果表明:在实验条件范围内煤样的特征温度随升温速率的增大而升高,随氧气体积分数的增加而降低;活化能随升温速率的增大而增大,随氧气体积分数的增大而增大。同时,TG曲线随着升温速率的增加向高温段漂移,随着氧气体积分数的增大向低温段漂移,说明在一定范围内,氧气体积分数的增加可以缩短反应时间,而增大升温速率则会延长反应时间。In order to investigate the oxidation characteristics of coal at low temperature,the thermogravimetric experiment had been carried on under different oxygen concentration and temperature raising rates. The results showed that,the characteristic temperature of coal increased as the heating rate increased,and decreased as the oxygen concentration increased. Coats-Redfen integral formula was used to calculate the activation energy of zone from the temperature where the maximum weight lost begins to ignition temperature. The results suggested that the activation energy increased as the heating rate increased,and increased as the oxygen concentration increased. TG curves drifted to the high-temperature section with the heating rate increased,and drifted to the low-temperature section with the oxygen concentration increased. It indicated that within a certain range,the increase of the oxygen concentration could short the reaction time,while raising the heating rate could extend reaction time.

关 键 词：煤粉自燃 热重 特征温度 动力学 活化能 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程]