步允川, 徐永亮, 陈蒙磊, 等.氧气体积分数对不同粒径烟煤低温氧化燃烧特性的影响研究[J].河南理工大学学报（自然科学版）,2022,41(5):38-45.

BU Y C, XU Y L, CHEN M L, et al.Study of oxygen volume fraction influence on the low-temperature oxidation characteristics of bituminous coal with different particle sizes[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(5):38-45.

氧气体积分数对不同粒径烟煤低温氧化燃烧特性的影响研究

步允川, 徐永亮, 陈蒙磊, 王兰云

河南理工大学 安全科学与工程学院，河南 焦作 454000

摘要:为研究氧气体积分数对不同粒径烟煤低温氧化、燃烧特性的影响，利用煤氧化动力学测试系统，对0.20~0.30 mm，＞0.30~0.45 mm，＞0.45~0.60 mm，＞0.60~0.90 mm 4种粒径烟煤煤样在21%，18%，14%，5%氧气体积分数下进行程序升温实验，分析煤样CO与C₂H₄指标性气体产生量、产热速率和动力学参数的变化规律，并运用煤氧反应微观演化机理进行论证。结果表明：氧气体积分数为14%时，不同粒径煤样的交叉点温度相差较小，指标性气体释放量相差较大，且最大升温速率拟合曲线斜率减小较快（减小近50%）；随着氧气体积分数增加，煤样最大产热速率和总放热量增大，初始放热温度降低；控制氧气体积分数在14%以下能有效预防氧化放热作用导致的煤自燃事故。

关键词:氧气体积分数;粒径;低温氧化;烟煤;燃烧特性

doi:10.16186/j.cnki.1673-9787.2020080069

基金项目:国家自然科学基金资助项目（52074108，51874124）；中国博士后科学基金资助项目（2017M612397）；河南省高等学校重点科研项目（18A440005）

收稿日期:2020/08/26

修回日期:2021/03/02

出版日期:2022/09/25

Study of oxygen volume fraction influence on the low-temperature oxidation characteristics of bituminous coal with different particle sizes

BU Yunchuan, XU Yongliang, CHEN Menglei, WANG Lanyun

College of Safety Science and Engineering，Henan Polytechnic University，Jiaozuo 454000，Henan，China

Abstract:To study the effect of oxygen volume fraction on low-temperature oxidation and combustion characteristics of bituminous coal samples with different particle sizes，the programmed heating experiments of coal samples with four particle sizes as 0.2~0.3 mm，＞0.3~0.45 mm，＞0.45~0.60 mm and ＞0.6~0.90 mm were carried out under the oxygen volume fraction of 21%，18%，14% and 5% by using the coal oxidation kinetics test system.The change rules of CO and C₂H₄（index gas）production，heat production rate and kinetic parameters of coal samples were analyzed and demonstrated by the micro-evolution mechanism of coal-oxygen reaction.The results showed that when the oxygen volume fraction was 14%，the temperature difference at the intersection of coal samples with different particle sizes was small，the gap of index gas release was large，and the slope of the fitting curve of the maximum heating rate decreased rapidly （by nearly 50%）.The higher the oxygen concentration，the greater the maximum heat generation rate，the higher the total heat output was and the lower the initial heat release temperature was controlling the oxygen volume fraction below 14% could effectively prevent.

Key words:oxygen volume fraction;particle size;low-temperature oxidation;bituminous coal;combustion characteristic

 006_2020080069_步允川_H.pdf