基于吸氧量的煤低温氧化动力学参数测定.pdfVIP

采矿与安全工程学报 Vo l. 24 No.2 第 24 卷第2 期 2007 年 06 月 Journal of Mining . Safety Engineering June 2007 文章编号:1673-3363(2007)02-0137-04 基于吸氧量的煤低温氧化动力学参数测定 李增华，齐 峰，杜长胜，潘尚昆，杨永良 (中国矿业大学煤炭资源与安全开采国家重点实验室，江苏徐州 22100的 摘要:活化能是表征煤自燃倾向性的重要指标.建立了基于吸氧量的煤低温氧化动力学参数计 算模型、实验方法及实验装置.研究分析了供气氧体积分数及煤样粒径对测定结果的影响，确定 了最佳实验条件，即供气氧体积分数为 10% ，煤样粒径为 O. 125~0. 25 mm. 最后，测定了张集、 杨庄和永城煤样的化学动力学参数，其活化能的大小很好的反映了煤样的自燃倾向性. 关键词:煤低温氧化;化学动力学参数;活化能;吸氧量;粒径;气流量 中图分类号: TD 75 文献标识码:A Measurement of Dynamic Parameters of Coal Oxidation at Low Temperature Based on Oxygen Consumption LI Zeng-hua , QI Feng , DU Chang-sheng , PAN Shang-kun , YANG Yong-liang (State Key Laboratory of Coal Resource and Mine Safety , China University of Mining . Technology Xuzhou , Jiangsu 221008 , China) Abstract: Activation energy is an important index reflecting the spontaneous combustion ten- dentiousness of coal. The model for calculating dynamic parameters of coal oxidation at low temperature based on oxygen absorption was established and the experimental method and de vices developed. The influence of oxygen concentration of air supply and particle size on experi mental results were researched and analyzed and the optimum experimental conditions deter- mined in which the oxygen concentration of air supply is 10% and the particle size is O. 125~0. 25 mm. Finally , the chemical dynamic parameters of the coal samples from Zhangji , Yang- zhuang , and Yongcheng were determined , showing that the activation energy of these samples can well reflect the spontaneous combustion tendentiousness. Key words: coal oxidation at low temperature; chemistry dynamic pa