变氧浓度及元素对煤自燃的影响  

Influence of Variable Oxygen Concentration and Elements on Spontaneous Combustion of Coal

作　　者：周旋旋 张修峰[2] ZHOU Xuan-xuan;ZHANG Xiu-feng(School of Industrial Safety and Occupational Health,Jiangsu College of Safety Technology,Xuzhou 221116,China;School of Transportation Engineering,Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China)

机构地区：[1]江苏安全技术职业学院工业安全与职业健康学院,江苏徐州221116 [2]江苏建筑职业技术学院交通工程学院,江苏徐州221116

出　　处：《煤炭技术》2021年第6期142-146,共5页Coal Technology

摘　　要：为研究不同氧气浓度对煤自燃指标气体的影响程度,采用绝热氧化实验系统,得到褐煤、烟煤和无烟煤3种不同变质程度煤的指标气体随温度的变化规律。同时,归纳了煤自燃特征温度与微观元素的多元线性回归模型。结果表明:氧气浓度对不同煤样的指标气体有显著影响,随着氧气浓度的增加,煤样氧化程度加深,CO浓度快速增加,且C_(2)H_(4)的初现温度降低;相同氧浓度下,褐煤、烟煤、无烟煤的CO/CO_(2)的拐点温度依次增加。交叉点温度和着火点温度与C、H元素质量分数正相关,与O元素质量分数负相关,且C元素质量分数对交叉点温度和着火点温度的影响权重最小。In order to study the influence of different oxygen concentrations on the index gases of coal spontaneous combustion,an adiabatic oxidation experiment system was used to obtain the variation law of index gas of lignite,bituminous and anthracite coal with different metamorphism degree with temperature.At the same time,the multiple linear regression model of characteristic temperature and microelement of coal spontaneous combustion is summarized.The results show that the oxygen concentration has a significant influence on the index gas of different coal samples.With the increase of oxygen concentration,the oxidation degree of coal samples deepens,the concentration of CO increases rapidly,and the initial temperature of C_(2)H_(4) decreases.Under the same oxygen concentration,the inflection point temperature of CO/CO_(2) of lignite,bituminous coal and anthracite increases successively.The crossing point temperature and the flaming point temperature are positively correlated with elements C and H,and negatively correlated with elements O,and the influence weight of element C on the intersection point temperature and the ignition point temperature is the least.

关 键 词：微观元素 变氧浓度 煤自燃倾向性 交叉点温度 回归分析 

分 类 号：TD752.2[矿业工程—矿井通风与安全]