挥发分对煤尘爆炸特性影响研究
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摘要
为了研究挥发分对煤尘爆炸的影响,利用FCY-II粉尘云最低点火能测定仪和水平玻璃管煤尘爆炸试验系统,测定了不同挥发分含量的煤尘爆炸最小点火温度和爆炸产生的最大火焰长度,分析了挥发分对煤尘爆炸最低点火温度影响,即通常情况下挥发分含量越大,最低点火温度越高,个别煤样不符合此规律,是因为水分含量过高,对煤尘爆炸起到抑制作用.选用合适的湍流及燃烧的数学理论模型,应用CFD软件模拟不同挥发分含量下煤尘爆炸的最大火焰长度,模拟结果与试验数据比对,误差均<20%,说明数值模拟结果可靠,模拟手段可行,为划分爆炸等级和制定防爆措施提供参考依据.
In order to study the influence of volatile matter on coal dust explosion, Using FCY II minimum ignition energy meter of dust cloud and horizontal glass tube coal dust explosion test system, Measured the minimum ignition temperature and maximum flame length of coal dust explosion with different volatile content. Analyzed the effect of volatiles on the minimum ignition temperature of coal dust explosion. Usually, the greater the volatile content is, the higher the minimum ignition temperature is. A coal samples do not conform to this rule,because the moisture content is too high, which plays an inhibitory role in the coal dust explosion. Simulated maximum flame length of coal dust explosion under different volatile content by CFD, The simulation results are in good agreement with the experimental data,and the error is < 15%, which indicates that the numerical simulation results are reliable, and the simulation method is feasible, which provides a reference for dividing the explosion grade and developing explosion prevention measures.
In order to study the influence of volatile matter on coal dust explosion, Using FCY II minimum ignition energy meter of dust cloud and horizontal glass tube coal dust explosion test system, Measured the minimum ignition temperature and maximum flame length of coal dust explosion with different volatile content. Analyzed the effect of volatiles on the minimum ignition temperature of coal dust explosion. Usually, the greater the volatile content is, the higher the minimum ignition temperature is. A coal samples do not conform to this rule,because the moisture content is too high, which plays an inhibitory role in the coal dust explosion. Simulated maximum flame length of coal dust explosion under different volatile content by CFD, The simulation results are in good agreement with the experimental data,and the error is < 15%, which indicates that the numerical simulation results are reliable, and the simulation method is feasible, which provides a reference for dividing the explosion grade and developing explosion prevention measures.
引文
[1]何朝远.煤尘爆炸特性与挥发分的关系[J].工业安全与防尘.1997, 11(11):24-27.
[2]李雨成,刘天奇,陈善乐等.煤质指标对煤尘爆炸火焰长度影响作用的主成分分析[J].中国安全生产科学技术,2015, 3(3):40-46.
[3]李雨成,刘天奇,赵晓涛.烟煤煤尘爆炸影响因素试验研究[J].辽宁工程技术大学学报,2017, 4(4):354-358.
[4]李雨成,刘天奇,周西华.煤尘爆炸火焰传播特性因子分析与BP网络组合预测研究[J].中国安全科学学报,2015, 10(10):53-58.
[5]曹卫国,徐森等.煤粉尘爆炸过程中火焰的传播特性[J].爆炸与冲击,2014, 9(5):586-593.
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[7]姜海鹏,司荣军,张延松等.挥发分对煤尘云最低着火温度的影响[J].煤矿安全,2014, 45(2):8-11.
[8]魏嘉.煤矿瓦斯煤尘爆炸数值模拟研究[D].山西:中北大学,2015:37-49.
[9]张莉聪,徐景德等.甲烷-煤尘爆炸波与障碍物相互作用的数值研究[J].中国安全科学学报,2004, 14(8):82-85.
[10]何琰儒,朱顺兵等.煤粉粒径对粉尘爆炸影响试验研究与数值模拟[J].中国安全科学学报,2017, 1(1):53-58.
[11]王冬雪,刘剑,王东等.煤尘挥发分及粒径对爆炸火焰长度的影响研究[J].中国安全生产科学技术,2016,12(5):43-47.
[12]王斌,刘庆明,汪建平等.静电点火下煤粉爆炸特性研究[J].煤矿安全,2015, 46(4):27-29.
[13] GB474—2007,煤样的制备方法[S]. 2007.
[14] GB/T212—2008,煤的工业分析方法[S]. 2008.
[15]薛薇.基于SPSS的数据分析[M].北京:中国人民大学出版社,2014.
[2]李雨成,刘天奇,陈善乐等.煤质指标对煤尘爆炸火焰长度影响作用的主成分分析[J].中国安全生产科学技术,2015, 3(3):40-46.
[3]李雨成,刘天奇,赵晓涛.烟煤煤尘爆炸影响因素试验研究[J].辽宁工程技术大学学报,2017, 4(4):354-358.
[4]李雨成,刘天奇,周西华.煤尘爆炸火焰传播特性因子分析与BP网络组合预测研究[J].中国安全科学学报,2015, 10(10):53-58.
[5]曹卫国,徐森等.煤粉尘爆炸过程中火焰的传播特性[J].爆炸与冲击,2014, 9(5):586-593.
[6]司荣军.矿井瓦斯煤尘爆炸传播数值模拟研究[J].中国安全科学学报,2008, 18(10):82-86.
[7]姜海鹏,司荣军,张延松等.挥发分对煤尘云最低着火温度的影响[J].煤矿安全,2014, 45(2):8-11.
[8]魏嘉.煤矿瓦斯煤尘爆炸数值模拟研究[D].山西:中北大学,2015:37-49.
[9]张莉聪,徐景德等.甲烷-煤尘爆炸波与障碍物相互作用的数值研究[J].中国安全科学学报,2004, 14(8):82-85.
[10]何琰儒,朱顺兵等.煤粉粒径对粉尘爆炸影响试验研究与数值模拟[J].中国安全科学学报,2017, 1(1):53-58.
[11]王冬雪,刘剑,王东等.煤尘挥发分及粒径对爆炸火焰长度的影响研究[J].中国安全生产科学技术,2016,12(5):43-47.
[12]王斌,刘庆明,汪建平等.静电点火下煤粉爆炸特性研究[J].煤矿安全,2015, 46(4):27-29.
[13] GB474—2007,煤样的制备方法[S]. 2007.
[14] GB/T212—2008,煤的工业分析方法[S]. 2008.
[15]薛薇.基于SPSS的数据分析[M].北京:中国人民大学出版社,2014.