MgH2粉尘爆炸的能量释放特性规律

张 云，赵懿明，许张归，赵凤起，徐司雨，裴 庆，徐 森，焦枫媛，吴星亮，贾宪振，曹卫国

火炸药学报 ›› 2022, Vol. 45 ›› Issue (6) : 898-904.

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  • 主管：中国科学技术协会

    主编：魏 卫

    ISSN 1007-7812

    　

  • 主办：中国兵工学会与中国兵器工业第204研究所共同

    出版：《火炸药学报》 编辑部

    CN 61-1310/TJ

《火炸药学报》1978年创刊，国内外公开发行。是由中国科协主管、中国兵工学会与中国兵器工业第二〇四研究所共同主办的学术刊物, 是我国创刊最早的火炸药技术专业期刊。
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火炸药学报 ›› 2022, Vol. 45 ›› Issue (6) : 898-904. DOI: 10.14077/j.issn.1007-7812.202206017

MgH2粉尘爆炸的能量释放特性规律

  • 张 云1,2,赵懿明2,许张归2,赵凤起1,徐司雨1,裴 庆1,徐 森3,焦枫媛2,吴星亮3,贾宪振1,曹卫国2
作者信息 +

Energy Release Characteristic Law of MgH2 Dust Explosion

  • ZHANG Yun1,2, ZHAO Yi-ming2, XU Zhang-gui2, ZHAO Feng-qi1, XU Si-yu1, PEI Qing1, XU Sen3, JIAO Feng-yuan2, WU Xing-liang3, JIA Xian-zhen1, CAO Wei-guo2
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摘要

为了探究MgH2粉尘爆炸的能量释放特性规律,采用改进后的20L球爆炸泄放装置获取了其爆炸压力和火焰传播规律,并分析了现行的工业粉尘爆炸泄放标准对MgH2爆炸泄放安全设计的适用性。结果表明,密闭条件下,MgH2粉尘爆炸压力随粉尘浓度的升高呈现先增大后减小的趋势,在750g/m3时达到最大,爆炸指数为310.5MPa·m/s; 泄放条件下泄放压力和火焰持续时间主要受MgH2粉尘浓度影响; 导管对泄放有限制作用,当导管长度从30cm增至100cm时,球内最大压力和压力上升速率分别上升了5%和9%; NFPA 68设计标准在250、500、1000g/m3时对MgH2粉尘爆炸较为适用,但在750g/m3时,标准的预测值低于实验值。因此,仅通过现有的普通工业粉尘爆炸泄放标准对MgH2进行爆炸泄放安全设计存在一定的安全风险。

Abstract

To explore the energy release characteristic of MgH2 dust, a modified 20L sphere explosion venting device was used to obtain its explosion pressure and flame propagation. The applicability of the current industrial dust explosion venting standard to the safety design of MgH2 explosion venting was analyzed. The results show that under airtight conditions, with the increase in dust concentration, the explosion pressure of MgH2 dust increases first and then decreases, which reaches the maximum at 750g/m3 with an explosion index of 310.5MPa·m/s. The venting pressure and flame duration are mainly affected by the MgH2 dust concentration. The duct has a restrictive influence on the venting. With the duct length growing from 30cm to 100cm, the maximum pressure and the explosion pressure rise rate in the vessel increase by 5% and 9%, respectively. NFPA 68 design standard is more applicable to MgH2 dust explosion at 250, 500 and 1000g/m3. At 750g/m3, the predicted value of the standard is lower than the experimental value. Only through the existing general industrial dust explosion venting standards for MgH2 explosion safety design may have certain risks.

关键词

爆炸力学 / MgH2 / 储氢材料 / 爆炸压力 / 火焰传播 / 爆炸泄放 / 安全设计

Key words

explosion mechanics / MgH2 / hydrogen storage material / explosion pressure / flame propagation / explosion venting / safety design

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张 云，赵懿明，许张归，赵凤起，徐司雨，裴 庆，徐 森，焦枫媛，吴星亮，贾宪振，曹卫国. MgH2粉尘爆炸的能量释放特性规律. 火炸药学报. 2022, 45(6): 898-904 https://doi.org/10.14077/j.issn.1007-7812.202206017
ZHANG Yun, ZHAO Yi-ming, XU Zhang-gui, ZHAO Feng-qi, XU Si-yu, PEI Qing, XU Sen, JIAO Feng-yuan, WU Xing-liang, JIA Xian-zhen, CAO Wei-guo. Energy Release Characteristic Law of MgH2 Dust Explosion. Chinese Journal of Explosives & Propellants. 2022, 45(6): 898-904 https://doi.org/10.14077/j.issn.1007-7812.202206017
中图分类号： TJ55    O38   

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