Influence of coal dust on the ignition of methane/air mixtures by friction sparks from rubbing of titanium against steel
Influence of coal dust on the ignition of methane/air mixtures by friction sparks from rubbing of titanium against steel
复制标题
煤尘对钛与钢摩擦产生的摩擦火花点燃甲烷/空气混合物的影响
DOI：
10.1016/j.fuel.2013.05.082
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发表时间：
2013-11
期刊：
影响因子：
7.4
通讯作者：
Yuan, Chun-Miao
中科院分区：
文献类型：
--
作者：
Li, Gang;Shang, Rong-Xue;Yu, Yun-Jiang;Wang, Jia-Zheng;Yuan, Chun-Miao
根据中国国家标准GB13813，建立了旋转摩擦试验装置，研究了煤尘对钛与钢摩擦产生的火花点燃甲烷/空气混合物的影响。利用高速摄像机和红外热成像仪观察到，在旋转的A3钢盘与钛棒摩擦的过程中，点燃甲烷/空气混合物的不是钛棒的热表面，而是钛颗粒的飞溅火花。采用褐煤、烟煤和无烟煤三种不同粒径组分，研究了煤尘对钛摩擦火花点燃甲烷/空气混合物过程的影响。研究发现，煤尘的引入使点火延迟时间普遍增加。煤粉粒径越小，滞燃时间越长。一个可能的原因是，较小的煤颗粒吸收了钛火花的大部分能量，这降低了火花点燃甲烷/空气混合物的能力。烟煤的点火延迟时间最短，褐煤的点火延迟时间最长，无烟煤居中。这与煤中水分的增加顺序是一致的，但与挥发物和硫含量的变化不一致。据推测，挥发性和含硫化合物的排放不如水蒸发造成的热量损失重要。
Based on the Chinese national standard GB13813, a rotating friction test device was set up for investigating the influence of coal dust on the ignition of methane/air mixtures by friction sparks from rubbing of titanium against steel. By using a high speed video camera and an infrared thermal imager, it was observed that it was the flying titanium particle sparks that ignited the methane/air mixtures during the process of rubbing a titanium rod against a rotating A3 steel disk, rather than the hot surface of the titanium rod. A set of experiments, using three different particle size fractions of lignite, bituminous coal and anthracite, were conducted to test the influence of coal dust on the process of ignition of methane/air mixture by titanium friction sparks. It was found that the ignition delay time generally increased when introducing coal dust. Furthermore, the smaller the coal particle size the longer the ignition delay time. A possible reason could be that smaller coal particles absorb a greater fraction of the energy of the titanium sparks, which reduces the ability of the sparks to ignite the methane/air mixture. The shortest ignition delay times were observed with bituminous coal and the longest with lignite, with the anthracite in between. This is in accordance with the increasing water content of the coals in the same order, but not with the variation of the contents of volatiles and sulfur. Presumably the emission of volatile and sulfur compounds is not as important as the heat loss by water evaporation.
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DOI：
--
发表时间：
2003
期刊：
Journal of China University of Mining and Technology
影响因子：
--
作者：
Wu Yan
通讯作者：
Wu Yan
DOI：
10.1016/j.jlp.2007.04.027
发表时间：
2007-07
影响因子：
3.5
作者：
C. Proust;S. Hawksworth;R. Rogers;M. Beyer;D. Lakic;D. Raveau;P. Herve;V. Pina;Claire Petitfrere;X. Lefebvre
通讯作者：
C. Proust;S. Hawksworth;R. Rogers;M. Beyer;D. Lakic;D. Raveau;P. Herve;V. Pina;Claire Petitfrere;X. Lefebvre
影响因子：
6.1
作者：
T. Komai;S. Uchida;Minoru Umezu
通讯作者：
T. Komai;S. Uchida;Minoru Umezu
影响因子：
5.6
作者：
Ward, CR;Crouch, A;Cohen, DR
通讯作者：
Cohen, DR
影响因子：
4.4
作者：
R. Blickensderfer
通讯作者：
R. Blickensderfer