[1]步允川,徐永亮,陈蒙磊,等.初始氧化温度对浸水长焰煤二次氧化特性的影响机制[J].中国安全生产科学技术,2020,16(5):64-69.[doi:10.11731/j.issn.1673-193x.2020.05.010]
BU Yunchuan,XU Yongliang,CHEN Menglei,et al.Influence mechanism of initial oxidation temperature on secondary oxidation characteristics of soaked longflame coal[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(5):64-69.[doi:10.11731/j.issn.1673-193x.2020.05.010]
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初始氧化温度对浸水长焰煤二次氧化特性的影响机制
BU Yunchuan,XU Yongliang,CHEN Menglei,et al.Influence mechanism of initial oxidation temperature on secondary oxidation characteristics of soaked longflame coal[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(5):64-69.[doi:10.11731/j.issn.1673-193x.2020.05.010]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 16
- 期数:
- 2020年5期
- 页码:
- 64-69
- 栏目:
- 职业安全卫生管理与技术
- 出版日期:
- 2020-05-30
文章信息/Info
- Title:
- Influence mechanism of initial oxidation temperature on secondary oxidation characteristics of soaked longflame coal
- 文章编号:
- 1673-193X(2020)-05-0064-06
- Keywords:
- initial oxidation; soaked coal sample; secondary oxidation characteristics; oxidation reaction mechanics; molecular bond energy
- 分类号:
- X936
- 文献标志码:
- A
- 摘要:
- 为揭示不同初始氧化温度下浸水长焰煤的氧化自燃特性，利用红外光谱和热分析实验手段以及MS数值模拟方法研究其氧化自燃规律，并采用线性拟合的方法阐述自由基变化特性。结合分子键能的变化，分析浸水条件下二次氧化的煤氧链式反应过程。研究结果表明：经过120 ℃预氧化后，浸水风干长焰煤的还原性官能团甲基、亚甲基、羟基均高于原煤，而羰基、羧基低于原煤；与原煤相比，浸水风干后的煤预氧化温度在120 ℃时最大升温速率最高（0.036 9 ℃/s），表现出更强的自燃倾向性；MS模拟优化得出煤中各官能团在预氧化120 ℃时键能变化较大，结合热分析实验，确立预氧化后浸水风干煤体氧化自燃特性机制。
- Abstract:
- In order to reveal the oxidation and spontaneous combustion characteristics of soaked longflame coal under different initial oxidation temperatures,the infrared spectroscopy,thermal analysis tests and MS numerical simulation method were applied to reveal its oxidation and spontaneous combustion laws,and the change characteristics of free radical were illustrated by using the method of linear fitting.Combined with the change of molecular bond energy,the coaloxygen chain reaction process of secondary oxidation under the soaking condition was analyzed.The results showed that the reductive functional groups including the methyl,methylene and hydroxyl of the soaked and airdried longflame coal after the preoxidation at 120 ℃ were all higher than those of raw coal,while the carbonyl and carboxyl groups were lower.Compared with the raw coal,the maximum heating rate of the soaked and airdried coal was the highest (0.036 9 ℃/s) when the preoxidation temperature was 120 ℃,which presented the stronger tendency of spontaneous combustion.Within the optimization of MS simulation,the bond energy of each functional group in the coal changed greatly at the preoxidation of 120 ℃.Combined with the thermal analysis experiments,the characteristic mechenism of the oxidation and spontaneous combustion for the soaked and airdried coal after the preoxidation was determined.
参考文献/References:
［1］王中伟.能源占比40%,煤炭该如何定位自己？［N］.中国煤炭报,2017-06-19(003).
［2］李雪明，王继仁，王雪峰，等.碱性水对煤自燃特性影响实验研究［J］.中国安全生产科学技术，2019,15(4):106-111.
LI Xueming,WANG Jiren,WANG Xuefeng，et al.Experimental study on effect of alkaline water on spontaneous combustion characteristics of coal ［J］.Journal of Safety Science and Technology,2019,15(4):106-111.
［3］孙旭明.长期水浸煤中溶出物质及对煤自燃特性的影响研究［D］.徐州：中国矿业大学,2015.
［4］SONG S,QIN B T,XIN H H，et al.Exploring effect of water immersion on the structure and low-temperature oxidation of coal:A case study of shendonglong flame coal,China［J］.Fuel,2018,234:732-737.
［5］皮子坤，董子文，李锐.水化煤饱和-风干过程的自燃特性实验研究［J］.中国安全生产科学技术,2019,15(9):94-98.
PI Zikun,DONG Ziwen,LI Rui.Experimental study on spontaneous combustion characteristics of hydrated coal during saturation-air drying process［J］.Journal of Safety Science and Technology,2019,15(9):94-98.
［6］邓存宝,乔玲,王雪峰，等.浸水褐煤的自燃特性及红外分析［J］.中国安全科学学报,2018，28(8):105-110.
DENG Cunbao,QIAO Ling,WANG Xuefeng，et al.Spontaneous combustion characteristics and infrared analysis of soaked lignite［J］.China Safety Science Journal,2018，28(8):105-110.
［7］ZHONG X X,KAN L,XIN H H,et al.Thermal effects and active group differentiation of low-rank coal during low-temperature oxidation under vacuum drying after water immersion［J］.Fuel,2019,236:1204-1212.
［8］阚罗.浸水过程对低阶煤低温氧化促进作用的实验研究［D］.徐州：中国矿业大学,2019.
［9］文虎，张建业，程方明，等.煤二次氧化的自燃特性实验研究［J］.煤炭技术,2015(34):290-292.
WEN Hu,ZHANG Jianye,CHENG Fangming,et al.Coal spontaneous combustion characteristics of secondary oxidation experiment［J］.Coal Technology,2015(34):290-292.
［10］肖旸，尹岚，马砺，等.不同预氧化温度下煤样热物性参数的实验研究［J］.西安科技大学学报,2018,38(3):383-388.
XIAO Yang,YIN Lan,MA Li，et al.Experimental study on coal thermo-physical parameters under the different peroxidation temperature［J］.Journal of Xi’an Universityof Scienceand Technology,2018,38(3):383-388.
［11］徐永亮,王兰云,宋志鹏,等.基于交叉点法的煤自燃低温氧化阶段特性和关键参数［J］.煤炭学报.2017,42(4):935-941.
XU Yongliang,WANG Lanyun,SONG Zhipeng,et al.Characteristics and critical parameters of coal spontaneous combustion at low temperature stage based on CPT method［J］.Journal of China Coal Society,2017,42(4):935-941.
［12］辛海会,王德明,戚绪尧,等.褐煤表面官能团的分布特征及量子化学分析［J］.北京科技大学学报,2013,35(2):135-139.
XIN Haihui,WANG Deming,QI Xuyao,et al.Distribution and quantum chemical analysis of lignite surface functional groups［J］.Metallurgical Information Review,2013,35(2):135-139.
［13］XIN H H,WANG D M,QI X Y，et al.Structural characteristics of coal cunctional croups using quantum chemistry for quantification of infrared spectra［J］.Fuel Processing Technology,2014,118:287-295.
［14］冯杰,李文英,谢克昌.傅立叶红外光谱法对煤结构的研究［J］.中国矿业大学学报,2002，31(5):362-366.
FENG Jie,LI Wenying,XIE Kechang.Research on coal structure using FT-IR［J］.Journal of China University of Mining & Technology,2002,31(5):362-366.
［15］王长安，王勃，李夏青,等.松散煤体表面温度与热源温度对应关系的热红外实验研究［J］.中国安全生产科学技术,2011,7(8):38-41.
WANG Changan,WANG Bo,LI Xiaqing,et al.Thermal infrared experimental study of the corresponding relationship between loose coal surface temperature and heat source temperature ［J］.Journal of Safety Science and Technology,2011,7(8):38-41.
［16］秦育红,赵清艳,李敏.不同煤阶煤的表面含氧官能团研究［C］ //第九届全国化学工艺学术年会,北京,2005.
［17］戚绪尧.煤中活性基团的氧化及自反应过程［J］.煤炭学报,2011,36(12):2133-2134.
QI Xuyao.Oxidation and self-reaction of active groups in coal［J］.Journal of China Coal Society,2011,36(12):2133-2134.
［18］周西华, 李昂, 聂荣山, 等． 不同变质程度煤燃烧阶段链烃生成规律［J］．煤炭学报，2016，41(7):1741-1746.
ZHOU Xihua, LI Ang, NIE Rongshan, et al. Chain hydrocarbons formation law of different metamorphic grade coals at combustion phrase［J］.Journal of China Coal Society,2016,41(7):1741-1746．
［19］祝婉婉.Upper Freeport煤和神府煤的热溶及其结构模拟［D］.马鞍山：安徽工业大学,2016.
［20］辛海会.煤火贫氧燃烧阶段特性演变的分子反应动力学机理［D］.徐州：中国矿业大学,2016.
相似文献/References:
备注/Memo
- 备注/Memo:
-
收稿日期： 2020-01-07；网络首发日期： 2020-05-22
* 基金项目： 国家自然科学基金项目（51874124）；河南省高校基本科研业务费专项资金项目（NSFRF180314）；中国博士后科学基金项目（2017M612397）
作者简介： 步允川，硕士研究生，主要研究方向为矿井火灾防治。
通信作者： 徐永亮，博士研究生，副教授，主要研究方向为矿井通风与防灭火、火灾动力学与瓦斯抑爆。
