煤尘爆炸性火焰长度影响因素实验研究

发布时间：2018-05-21 04:39

本文选题：工业分析成分 + 粒径　；参考：《辽宁工程技术大学》2017年硕士论文

【摘要】：本论文利用实验方法研究煤尘爆炸性火焰长度的影响因素,将煤样制备成31.5μm、44μm、62.5μm、81.5μm、119μm、150μm六种粒径,利用煤尘爆炸性鉴定装置测试其爆炸性火焰长度,并选取挥发分含量为18.99%、27.52%、32.20%、39.74%的四种典型烟煤煤样进行数据分析,研究工业分析成分、粒径、岩粉含量对爆炸性火焰长度的影响规律。结果表明:工业分析成分中挥发分含量对爆炸性火焰长度起决定性作用,对于高挥发分含量煤样,水分和灰分对爆炸性火焰长度的影响极其微弱。粒径对爆炸性火焰长度有重要的影响作用,粒径越小爆炸性火焰长度越长,而当粒径大于150μm之后,即使是高挥发分煤样其爆炸火焰也会消失。综合分析粒径和挥发分含量可知,煤尘的粒径小于100μm时,挥发分含量决定着爆炸性火焰长度,而当粒径大于100μm时,煤尘的爆炸性火焰长度主要受粒径的影响。对煤样添加岩粉能够很好的抑制爆炸性火焰长度,对于粒径相同的煤样,其挥发分含量越低,抑制煤尘爆炸最低岩粉含量值越小。在抑爆效果方面,并是不岩粉含量越高,抑爆效果越好,爆炸性火焰长度随着岩粉含量增加呈现下降之后小幅上涨再下降的趋势,因此针对不同煤样,有一个抑爆效率最高的岩粉添加量。论文得出的结论可为煤矿现场治理煤尘爆炸提供理论参考。
[Abstract]:In this paper, the influencing factors of the explosive flame length of coal dust were studied by means of experimental method. The coal sample was prepared into six kinds of particle sizes of 31.5 渭 m, 44 渭 m, 62.5 渭 m, 81.5 渭 m, 119 渭 m, 150 渭 m, and the explosive flame length was measured by coal dust explosive identification device. Four typical bituminous coal samples with a volatile content of 18.99% 27.52% and 39.74% of bituminous coal were selected for data analysis, and the effects of industrial composition, particle size and rock powder content on the length of explosive flame were studied. The results show that volatile matter content plays a decisive role in the length of explosive flame in industrial analysis, and the effect of moisture and ash on the length of explosive flame is very weak for coal samples with high volatile content. Particle size has an important effect on the length of explosive flame. The smaller the particle size, the longer the length of explosive flame, and when the particle size is larger than 150 渭 m, even the high volatile coal sample will disappear. When the particle size of coal dust is less than 100 渭 m, the content of volatile matter determines the length of explosive flame, but when the particle size is larger than 100 渭 m, the explosive flame length of coal dust is mainly affected by particle size. Adding rock powder to coal sample can restrain the length of explosive flame very well. For coal sample with the same particle size, the lower the content of volatile matter, the smaller the minimum rock powder content of inhibiting coal dust explosion. As for the effect of explosion suppression, the higher the content of rock powder is, the better the effect of explosion suppression is. The length of explosive flame increases slightly and then decreases with the increase of rock powder content. Therefore, for different coal samples, There is a rock powder with the highest explosion suppression efficiency. The conclusion can provide theoretical reference for coal dust explosion control.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD714.5

【参考文献】