Influence of coal metamorphism on minimum ignition temperature of coal dust clouds

doi:10.16265/j.cnki.issn1003-3033.2020.05.004

Abstract

Abstract: In order to study combustion characteristics of coal dust of different metamorphism, 9 kinds of coal samples from various mines were selected and their industrial components such as moisture, volatiles, ash and fixed carbon were analyzed. Secondly, minimum ignition temperature experiments of coal dust clouds were performed. Finally, statistical and gray correlation analysis was conducted between industrial analysis index and minimum ignition temperature. The results show that the minimum ignition temperature differ sharply, varying from 405 to 515 ℃, and it is strongly correlated with industrial analysis index.Volatile and fixed carbon content are negatively correlated with it while ash and moisture content positively correlated with it. In other words, The higher volatile and fixed carbon content, the more likely coal dust is to catch fire, and the higher ash and moisture content, the more unlikely coal dust is to ignite. In addition, volatile content is mostly linked to minimum ignition temperature.

Key words: coal dust cloud, ignition performance, minimum ignition temperature, industrial analysis, gray interrelation

CLC Number:

X936

ZHANG Chao , LIU Shanjun, YANG Li'na, TIAN Dongmei, YANG Tao, XU A'meng. Influence of coal metamorphism on minimum ignition temperature of coal dust clouds[J]. China Safety Science Journal, 2020, 30(5): 21-26.

References

[1] 王克全. 煤尘与矿井特大爆炸伤亡事故的关系[J]. 工业安全与防尘,1998, 24(1): 25-29.
WANG Kequan. Relation between the coal dust and the large scale explosion injury accidents in coal mines[J]. Industrial Safety and Dust Control, 1998, 24(1): 25-29.
[2] KRAZINSKI J L, BUCKIUS R O, KRIER H. Coal dust flames: a review and development of a model for flame propagation[J]. Progress in Energy & Combustion Science, 1979, 5(1): 31-71.
[3] 闵凡飞, 张明旭. 生物质与不同变质程度煤混合燃烧特性的研究[J]. 中国矿业大学学报, 2005, 34(2): 236-241.
MIN Fanfei, ZHANG Mingxu. Research on combustion characteristics of biomass and coals with different ranks [J]. Journal of China University of Mining & Technology, 2005,34(2): 236-241.
[4] 程根银, 任强, 司俊鸿,等. 蒙西侏罗纪煤层自燃机理参数测定分析研究[J]. 煤矿安全,2020, 51(4): 26-30.
CHENG Genyin, REN Qiang, SI Junhong, et al. Determination and analysis of spontaneous combustion mechanism parameters of western inner mongolia jurassic coal seam [J]. Safety in Coal Mines, 2020, 51(4): 26-30.
[5] 张骁博, 赵虹, 杨建国. 不同粒径煤粉煤质变化及燃烧特性研究[J]. 煤炭学报, 2011, 36(6): 999-1 003.
ZHANG Xiaobo, ZHAO Hong, YANG Jianguo. Study on the variation of coal properties for different coal diameters and its effects on combustion characteristics[J]. Journal of China Coal Society, 2011, 36(6): 999-1 003.
[6] 亓冠圣,李敏, 杨虎胜,等. 煤堆水平阴燃传播特性试验研究[J]. 中国安全科学学报, 2019, 29(9): 47-52.
QI Guansheng, LI Min, YANG Husheng, et al. Experimental study on propagation characteristics of horizontal smoldering combustion of coal pile [J]. China Safety Science Journal, 2019, 29(9): 47-52.
[7] 王宝晴, 张超, 刘建. 不同风速下巷道断面微细粉尘分布模拟试验研究[J]. 中国安全科学学报, 2018, 28(3): 44-49.
WANG Baoqing, ZHANG Chao, LIU Jian. Simulation experimental study on fine dust distribution over roadway section under different wind speeds[J]. China Safety Science Journal, 2018, 28(3): 44-49.
[8] 朱群益, 秦裕琨, 吴少华. 采用热天平研究煤粉燃烧特性时的一维燃烧模型[J]. 动力工程, 2003, 23(4): 2 519-2 523.
ZHU Qunyi, QIN Yukun, WU Shaohua. Research on one dimension combustion model of pulverized coal burning performance with the thermobalance[J]. Power Engineering, 2003, 23(4): 2 519-2 523.
[9] 邓军, 屈姣, 王秋红,等. 烟煤煤尘云最低着火温度实验研究[J]. 矿业安全与环保, 2014, 41(6): 13-18.
DENG Jun, QU Jiao, WANG Qiuhong, et al. Experimental study on minimum ignition temperature of bituminous coal dust cloud [J]. Mining Safety ＆ Environmental Protection, 2014, 41(6): 13-18.
[10] 刘天奇. 不同煤质煤尘云与煤尘层最低着火温度实验研究[J]. 燃烧科学与技术, 2019, 25(5): 445-450.
LIU Tianqi. Experimental study on minimum ignition temperature of coal dust cloud and coal dust layer of different metamorphism[J]. Journal of Combustion Science and Technology, 2019, 25 (5): 445-450.
[11] GB/T30732—2014, 煤的工业分析方法仪器法[S].
GB/T30732-2014, Proximate analysis of coal:instrumental method[S].
[12] GB/T16429—1996, 粉尘云最低着火温度测定方法[S].
GB/T16429-1996,Determination of the minimum ignition temperature of dust cloud [S].
[13] ASTM E1491-06(2012), Standard test method for minimum auto ignition temperature of dust clouds [S].
[14] 邓聚龙. 灰理论基础[M]. 武汉:华中科技大学出版社, 2002: 122-141.
[15] 胡鷹, 叶义成, 李丹青,等. 建筑安全事故灰色季节指数预测模型及应用[J]. 中国安全科学学报, 2014, 24(4): 86-91.
HU Ying, YE Yicheng, LI Danqing, et al. Grey seasonal index prediction model for construction safety accident and its application[J]. China Safety Science Journal, 2014,24(4): 86-91.
[16] 张超, 张云鹏, 周金龙, 等. 兴隆县中小煤矿突水事故因素的灰色关联分析[J]. 河北理工大学学报, 2006, 28(2):4-7,10.
ZHANG Chao, ZHANG Yunpeng, ZHOU Jinlong et al. Grey interrelation analysis on the water inrush disaster in coal mine of the Xinglong county[J]. Journal of Hebei Institute of Technology, 2006, 28(2): 4-7,10.
[17] 张天宝, 纪洪广, 李颂. 金矿采场环境因素变化分析及灰色聚类评价[J]. 中国安全科学学报, 2018, 28(9): 142-147.
ZHANG Tianbao, JI Hongguang, LI Song. Analysis of environmental factors change in mining face of a gold mine and its grey cluster assessment[J]. China Safety Science Journal, 2018,28(9): 142-147.