煤氧化放热特征及影响因素的关联分析  

Relational analysis of coal oxidation exothermic characteristics and affecting factors

作　　者：李宗翔[1,2] 张明乾 刘宇[1] 杨志斌 苗春桐 王海文 许昊宇 LI Zong-xiang;ZHANG Ming-qian;LIU Yu;YANG Zhi-bin;MIAO Chun-tong;WANG Hai-wen;XU Hao-yu(College of Safety Science and Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China;Research Institute of Safety Science and Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China;China Coal Technology and Engineering Group Shenyang Research Institute,Fushun 113122,Liaoning,China;State Key Laboratory of Coal Mine Safety Technology,Fushun 113122,Liaoning,China)

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]辽宁工程技术大学安全科学与工程研究院,辽宁阜新123000 [3]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [4]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《安全与环境学报》2023年第1期49-56,共8页Journal of Safety and Environment

基　　金：国家自然科学基金面上项目(51774170);辽宁省教育厅青年基金项目(LJ2020QNL015)。

摘　　要：为研究煤在低温氧化过程中的放热特征,确定影响煤氧化放热强度的主要因素,以4种不同煤化程度煤样为研究对象,采用封闭式煤氧化试验方法,结合键能平衡法计算煤在25~70℃、氧气体积分数0~21%范围内的氧化放热强度,获得煤氧化过程中氧氧气体积分数、温度和氧化放热强度三者间的关系表达式;运用灰色关联法分析挥发分、水分、含硫量、灰分、氧气体积分数和温度与煤氧化放热强度的关联度。结果表明,煤耗氧速度、CO释放速率和CO_(2)释放速率随温度升高呈指数增长趋势。通过比较挥发分、水分、含硫量、灰分、氧气体积分数和温度与煤氧化放热强度的关联度可知,影响不同煤化程度煤样氧化放热强度的主要因素是煤自身的挥发分质量分数,而外部因素中的温度对同一煤样氧化放热强度的影响要强于氧气体积分数。To investigate the exothermic characteristics of coal in the process of low-temperature oxidation,the main factors affecting the oxidation heat liberation intensity of coal were determined.Taking four kinds of coal samples with different ranks of coalification as research targets,the rates of coal oxygen consumption,CO release rate,and CO_(2)release rate were measured by using the closed oxygen consumption test method under the condition of a temperature of 25-70℃and oxygen volume fraction of 0-21%,and the oxidation heat liberation intensity of coal was calculated by using the bond energy balance method.The grey correlation analysis method was used to analyze the correlation degree between every single factor including volatile matter,moisture,sulfur content,ash,oxygen volume fraction and temperature,and the oxidation heat liberation intensity of coal.Based on the experimental results,the following conclusions were obtained:under the condition of the constant temperature,both the oxygen volume fraction,CO volume fraction,and CO_(2)volume fraction in the system of the closed oxygen consumption test obey the exponential distribution law;the rate of coal oxygen consumption,CO release rate and CO_(2)release rate increase exponentially with the increase of the temperature;there is an obvious corresponding relationship among the oxidation heat liberation intensity,the temperature and the oxygen volume fraction of coal;the correlation degree between every single factor including volatile matter,moisture,sulfur content,ash,oxygen volume fraction and temperature and the oxidation heat liberation intensity of coal,the corresponding figures are 0.9230,0.9007,0.8782,0.91080,0.8784 and 0.8786.The main factor affecting the oxidation heat liberation intensity of the different kinds of coal samples is the volatile matter,and the effect of temperature on the intensity of oxidation heat liberation from the same coal sample is stronger than that of volume fraction.

关 键 词：安全工程 煤自燃 键能平衡法 灰色关联分析法 煤氧化 

分 类 号：X936[环境科学与工程—安全科学]