微米级铝粉最低着火温度和爆炸特性试验研究

doi:10.16265/j.cnki.issn1003-3033.2019.11.016

摘要/Abstract

摘要： 为更好防治铝粉爆炸,针对不同因素对微米级铝粉的最低着火温度和爆炸特性的影响灵敏度进行试验研究,揭示不同因素对其影响程度大小。最低着火温度和爆炸特性分别由粉尘云最低着火温度测试系统和20 L球爆炸装置测试。试验结果表明:粒径越小,比表面积越大,铝粉越容易发生燃烧爆炸;逐个分析粒径、质量浓度和分散压力这3项影响因素对铝粉尘云最低着火温度影响敏感度,得出敏感度大小为粒径＞分散压力＞质量浓度;逐个分析点火延迟时间、粒径和质量浓度这3项影响因素对铝粉爆炸参数的影响灵敏度,得出灵敏度大小为粒径＞点火延迟时间＞质量浓度。

关键词: 微米级铝粉, 粒径, 质量浓度, 分散压力, 点火延迟时间, 着火敏感度, 爆炸特性

Abstract: In order to better prevent aluminum powder explosion, experimental study was conducted on influence sensitivity of different factors on minimum ignition temperature and explosion characteristics of micron-sized aluminum powder to reveal their influence degree. Minimum ignition temperature and explosion characteristics were tested through a dust cloud minimum ignition temperature test system and a 20L ball explosion device, respectively. The experimental results show that the smaller particles are, the larger specific surface areas will be, and the more likely aluminum powder is to be burned and exploded. The influence sensitivity of three factors on minimum ignition temperature of aluminum dust cloud ranks as particle size>dispersion pressure>concentration after they are analyzed one by one. And the rank of three factors which influence aluminum powder explosion parameters is concluded as particle size > ignition delay time > concentration after analysis on them one by one.

Key words: micron-sized aluminum powder, particle size, concentration, dispersion pressure, ignition delay time, ignition sensitivity, explosion characteristics

中图分类号:

X932

陈海燕, 姚庆国, 张延松, 刘浩, 张兴旭. 微米级铝粉最低着火温度和爆炸特性试验研究[J]. 中国安全科学学报, 2019, 29(11): 96-102.

CHEN Haiyan, YAO Qingguo, ZHANG Yansong, LIU Hao, ZHANG Xingxu. Experimental study on minimum ignition temperature and explosion characteristics of micron-sized aluminum powder[J]. China Safety Science Journal, 2019, 29(11): 96-102.

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