WEI Yanrong;XIAO Cuiwei;WANG Naiji;WANG Yongying;

• 1:Energy Saving Engineering Technology Branch
• 2:Coal Science and Technology Research Institute Co.
• 3:Ltd.
• 4:State Key Laboratory of Coal Resources High Efficient Mining and Clean Utilization

Abstract：

In order to investigate the oxidation characteristics of coal at low temperature,the thermogravimetric experiment had been carried on under different oxygen concentration and temperature raising rates. The results showed that,the characteristic temperature of coal increased as the heating rate increased,and decreased as the oxygen concentration increased. Coats-Redfen integral formula was used to calculate the activation energy of zone from the temperature where the maximum weight lost begins to ignition temperature. The results suggested that the activation energy increased as the heating rate increased,and increased as the oxygen concentration increased. TG curves drifted to the high-temperature section with the heating rate increased,and drifted to the low-temperature section with the oxygen concentration increased. It indicated that within a certain range,the increase of the oxygen concentration could short the reaction time,while raising the heating rate could extend reaction time.

Key Words： pulverized coal spontaneous combustion;thermogravimetric experiment;characteristic temperature;kinetics;activation energy

Abstract:

Keywords:

Foundation: 煤炭科学技术研究院有限公司基础研究基金资助项目(2015JC01)

Authors: WEI Yanrong;XIAO Cuiwei;WANG Naiji;WANG Yongying;

DOI: 10.13226/j.issn.1006-6772.2016.01.015

References：

• [1]邓军,徐精彩,阮国强,等.国内外煤炭自然发火预测预报技术综述[J].西安矿业学院学报,1999,19(4):293-297.Deng Jun,Xu Jingcai,Ruan Guoqiang,et al.Review of the prediction and forecasting techniques of coal self-heating both at home and abroad[J].Journal of Xi'an University of Science&Technology,1999,19(4):293-297.
• [2]王永春,何文明,卓思忠.煤粉仓底部着火的处理措施[J].水泥,2013(3):61.Wang Yongchun,He Wenming,Zhuo Sizhong.Measures on powdered coal warehouse bottom fire[J].Cement,2013(3):61.
• [3]郭子然.一次煤粉仓自燃的处置[J].水泥,2007(6):31-32.Guo Ziran.A handling of spontaneous combustion of powdered coal warehouse[J].Cement,2007(6):31-32.
• [4]王继仁.煤自燃量子化学理论[M].北京:科学出版社,2007.Wang Jiren.Quantum chemistry theory of spontaneous combustion of coal[M].Beijing:Science Press,2007.
• [5]邓军,徐精彩,陈晓坤.煤自燃机理及预测理论研究进展[J].辽宁工程技术大学学报(自然科学版),2003,22(4):455-459.Deng Jun,Xu Jingcai,Chen Xiaokun.Perspectives on spontaneous combustion mechanism and prediction theory of coal[J].Journal of Liaoning Technical University(Natural Science Edition),2003,22(4):455-459.
• [6]Nugroho Y S,Mc Intosh A C,Gibbs B M.Low-temperature oxidation of single and blended coals[J].Fuel,2000,79(15):1951-1961.
• [7]Yuan L,Smith A C.Numerical study on effects of coal properties on spontaneous heating in longwall gob areas[J].Fuel,2008,87(15/16):3409-3419.
• [8]肖旸,马砺,王振平,等.采用热重分析法研究煤自燃过程的特征温度[J].煤炭科学技术,2007,35(5):73-76.Xiao Yang,Ma Li,Wang Zhenping,et al.Research on characteristic temperature in coal spontaneous combustion with thermal gravity analysis method[J].Coal Science and Technology,2007,35(5):73-76.
• [9]Garcia P,Hall P J,Mondragon F.The use of differential scanning calorimetry to identify coals susceptible to spontaneous combustion[J].Thermochemical Act,1999,336(1):41-46.
• [10]徐朝芬,胡松,孙学信,等.热重-红外联用技术在煤燃烧特性研究中的应用[J].热力发电,2005,34(3):39-41.Xu Chaofen,Hu Song,Sun Xuexin,et al.Application of tga ftir integrated technology in study on coal burning behavior[J].Thermal Power Generation,2005,34(3):39-41.
• [11]张斌,刘建忠,赵卫东,等.褐煤自燃特性热重实验及动力学分析[J].热力发电,2014,43(6):71-76.Zhang Bin,Liu Jianzhong,Zhao Weidong,et al.Thermogravimetric experiments and dynamic analysis on spontaneous combustion characteristics of lignite[J].Thermal Power Generation,2014,43(6):71-76.
• [12]余明高,王清安.煤与氧反应动力学数学模型及其求解[J].湘潭矿业学院学报,2001,16(3):20-23.Yu Minggao,Wang Qing'an.The dynamics mathematical model of reaction between coal and oxygen and its calculating method[J].Journal of Xiangtan Mining Institute,2001,16(3):20-23.
• [13]刘剑,陈文胜,齐庆杰.基于活化能指标煤的自燃倾向性研究[J].煤炭学报,2005,30(1):67-70.Liu Jian,Chen Wensheng,Qi Qingjie,et al.Study on the spontaneous combustion tendency of coal based on activation energy index[J].Journal of China Coal Society,2005,30(1):67-70.
• [14]梁栋,王云鹤,王进,等.升温速率与煤氧化特征关系的实验研究[J].煤炭科学技术,2008,36(3):72-74.Liang Dong,Wang Yunhe,Wang Jin,et al.Test and research on relationship between temperature rising rate and coal oxidized features[J].Coal Science and Technology,2008,36(3):72-74.
• [15]朱红青,沈静,王海燕,等.氧气浓度与煤氧化特征关系的热重实验研究[J].煤矿安全,2014,45(5):16-19.Zhu Hongqing,Shen Jing,Wang Haiyan,et al.Thermo gravimetry experiment study on relationship between oxygen concentration and characteristics of coal oxidation[J].Safety in Coal Mines,2014,45(5):16-19.
• [16]刘国伟,董芃,韩亚芬,等.富氧条件下煤燃烧特性的热重分析实验研究[J].哈尔滨工业大学学报,2011,43(1):104-108.Liu Guowei,Dong Fan,Han Yafen,et al.Experimental study on combustion characteristics of coals under enriched-oxygen condition by thermo-gravimetric analysis[J].Journal of Harbin Institute of Technology,2011,43(1):104-108.
• [17]王长安,刘银河,车得福,等.低氧浓度下煤燃烧特性的热重实验研究[J].工程热物理学报,2010,31(10):1785-1788.Wang Chang'an,Liu Yinhe,Che Defu,et al.Experimental investigation on combustion characteristics of coals in low oxygen concentration with thermogravimetry[J].Journal of Engineering Thermophysics,2010,31(10):1785-1788.
• [18]Benfell Kathy E,Beamish B Basil,Rodgers K A.Thermogravimetric analytical procedures for characterizing New Zealand and Eastern Australian coals[J].Thermochimica Acta,1996,286(1):67-74.
• [19]何启林,王德明.TG-DTA-FTIR技术对煤氧化过程的规律性研究[J].煤炭学报,2005,30(1):53-57.He Qilin,Wang Deming.Comprehensive study on the rule of spontaneous combustion[J].Journal of China Coal Society,coal in oxidation process by TG-DTA-FTIR technology,2005,30(1):53-57.
• [20]余明高,郑艳敏,路长,等.煤自燃特性的热重-红外光谱实验研究[J].河南理工大学学报(自然科学版),2009,28(5):547-551.Yu minggao,Zheng Yanmin,Lu Zhang,et al.Experiment research on coal spontaneous combustion characteristics by TG-FTI[J].Journal of Henan Polytechnic University(Natural Science),2009,28(5):547-551.
• [21]Xu Y,Lin S,Yuan H,et al.Thermogravimetric Analysis on the Combustion Characteristics for Blended Coals[C]//Challenges of Power Engineering&Environment.Berlin Heidelberg:Springer,2006:153-156.