| 不同粒径易自燃煤常温氧化实验研究* |
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| 引用本文： | 薛创,秦汝祥,张树川,戴广龙,候树宏,骆大勇.不同粒径易自燃煤常温氧化实验研究*[J].中国安全生产科学技术,2021,17(8):64-69. |
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| 作者姓名： | 薛创 秦汝祥 张树川 戴广龙 候树宏 骆大勇 |
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| 作者单位： | （1.安徽理工大学 安全科学与工程学院，安徽 淮南 232001；2.煤矿安全高效开采省部共建教育部重点实验室，安徽 淮南 232001；3.宁夏煤业公司 羊场湾煤矿，宁夏 灵武 751410；4.重庆工程职业技术学院，重庆 402260） |
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| 基金项目： | * 基金项目: 国家自然科学基金项目（51874007）;安徽省教育厅自然科学重点研究项目（KJ2018A0099）;重庆市教育委员会科学技术研究青年项目（KJQN201803401） |
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| 摘 要： | 为探究易自燃煤在常温条件下的氧化特性，自行设计煤常温封闭氧化实验装置，采用实验研究与回归分析2种方法，分析易自燃煤发生氧化反应的气体变化过程，探究3种粒径煤样在20 ℃有限空间内的耗氧与产气特征。结果表明:易自燃煤样在16 d常温封闭氧化过程中，容器内O2体积浓度呈指数衰减、CO和CO2体积浓度呈指数增长的变化规律；在0.06~0.83 mm范围内，粒径越大，易自燃煤耗氧速率越大，CO和CO2产生速率则先增大后减小；介于中间的粒径为0.13~0.25 mm易自燃煤氧化反应最强烈，更容易发生氧化。研究结果对揭示生产环境温度下煤粒粒径对煤自燃的影响有一定的意义。
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| 关 键 词： | 粒径 煤自燃 常温氧化 耗氧速率 CO产生速率 CO2产生速率 |
Experimental study on oxidation of easily spontaneous combustion coal with different particle sizes at ambient temperature |
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| XUE Chuang,QIN Ruxiang,ZHANG Shuchuan,DAI Guanglong,HOU Shuhong,LUO Dayong.Experimental study on oxidation of easily spontaneous combustion coal with different particle sizes at ambient temperature[J].Journal of Safety Science and Technology,2021,17(8):64-69. |
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| Authors: | XUE Chuang QIN Ruxiang ZHANG Shuchuan DAI Guanglong HOU Shuhong LUO Dayong |
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| Affiliation: | (1.School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China;2.Key Laboratory of Safety and High-efficiency Coal Mine Exploitation of Ministry of Education,Huainan Anhui 232001,China;3.Yangchangwan Colliery of Ningxia Coal Industry Group Ltd.,Lingwu Ningxia 751410,China;4.Chongqing Vocational Institute of Engineering,Chongqing 402260,China) |
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| Abstract: | In order to explore the oxidation characteristics of easily spontaneous combustion coal at the ambient temperature,a self-designed closed oxidation experimental device of coal at the ambient temperature was established.Two methods of experimental research and regression analysis were used to analyze the gas variation process in the oxidation reaction of easily spontaneous combustion coal,and the oxygen consumption and gas production characteristics of three coal samples with different particle sizes in the limited space at 20 ℃ were explored.The results showed that for the easily spontaneous combustion coal samples in the closed oxidation process of 16 days at the ambient temperature,the volume concentration of O2 in the container decreased exponentially,and the volume concentration of CO and CO2 increased exponentially.In the range of 0.06~0.83 mm,the larger the particle size,the greater the oxygen consumption rate of easily spontaneous combustion coal,while both the CO production rate and CO2 production rate increased firstly and then decreased.The easily spontaneous combustion coal with the middle particle size of 0.13~0.25 mm had the strongest oxidation reaction,which was easier to oxidize.The research results have certain significance in revealing the influence of coal particle size on coal spontaneous combustion at the production environmental temperature. |
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| Keywords: | particle size coal spontaneous combustion ambient temperature oxidation oxygen consumption rate CO production rate CO2 production rate |
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