基础内因参数对煤自燃低温临界温度的影响  

Influence of Fundamentally Inner Parameters to Critical Temperature of Low Temperature stage in Coal Self-Ignition Process

作　　者：王海燕 朱红青[3] 姚海飞[1,2] 郑忠亚[1,2] 张群 

机构地区：[1]煤炭科学技术研究院有限公司安全分院,北京100013 [2]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013 [3]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《应用基础与工程科学学报》2016年第3期499-509,共11页Journal of Basic Science and Engineering

基　　金：国家自然科学基金(煤炭联合)重点项目(U1261214);煤炭科学技术研究院科技发展基金项目(2014JC06)

摘　　要：煤自燃低温氧化过程分为缓慢氧化阶段和快速氧化阶段,为研究内在因素对煤自燃低温临界温度的影响,首先在理论分析的基础上确定了挥发分、灰分、固定碳和C、N、S、H、O元素含量8个基础内因参数以及TJR、TCO和TO23个煤自燃低温临界温度表征参数,然后对7个煤样纯氧气氛下40~180℃的自热升温特征和空气气氛下30~180℃的气体释放进行实验测试,得到基础内因参数及表征参数数值,比较了不同表征参数间及基础内因参数间的关系.在灰色关联度分析的基础上,筛选出5个关联度高的基础内因参数与表征参数进行数学公式拟合.结果表明:3个煤自燃低温临界温度表征参数从升温、CO释放以及耗氧角度表现临界状况,数值大小虽有差异,但趋向性一致、相互印证;煤自燃低温临界温度与煤中挥发分和H、O元素含量负相关,与S元素含量关系不确定,其它因素对其影响小.Low-temperature oxidation process of coal self-ignition can be divided into two stages-slow oxidation stage and fast oxidation stage. To study the effect of internal factors to critical temperature of low temperature grade in coal self-ignition process,8 fundamentally inner parameters( volatile,ash,fixed carbon,C,N,S,H and O) and 3 characterization parameters of critical temperature in low temperature grade of coal self-ignition process( TJR,TCOand TO2)were determined on theoretical analysis first,then the self-heating characteristics in pure oxygen atmosphere in the range from 40 to 180℃ and gas releasing atmosphere in the range from 30 to180℃ for 7 coal samples were tested. Based on this,the value of fundamentally inner parameters and characterization parameters for 7 coal samples were obtained. The relationship between fundamentally inner parameters and that of characterization parameters were compared.On grey relational analysis,5 important influence parameters are filtered to make mathematical formula fitting with characterization parameters. The results show that characterization parameters reflect critical temperature from different aspects-temperature rising,CO releasing and oxygen consumption. They are different for the same coal sample,but are with the same tropism and confirm each other. Critical temperatures is negatively correlated with the contents of volatiles,H and O,not of determined relationship with the content of S and having small correlation with other parameters.

关 键 词：煤自燃 临界温度 基础内因参数 程序升温实验 绝热氧化实验 灰色关联性 数值拟合 

分 类 号：TD752.2[矿业工程—矿井通风与安全]