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氯化钠对镁铝合金粉末爆炸抑制作用的研究

Research on the Inhibition Effect of NaCl on the Explosion of Mg-Al Alloy Powder.

作者信息

Qin Xinxin, Wei Xiangrui, Shi Jing, Yan Yanling, Zhang Yansong

机构信息

College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China.

出版信息

ACS Omega. 2024 Feb 7;9(7):8048-8054. doi: 10.1021/acsomega.3c08242. eCollection 2024 Feb 20.

DOI:10.1021/acsomega.3c08242
PMID:38405477
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10882612/
Abstract

A study was conducted on the explosion overpressure and flame propagation law of magnesium-aluminum (Mg-Al) alloy powder, and the suppression mechanism of sodium chloride (NaCl) on the explosion of magnesium-aluminum alloy powder was explored. Adding NaCl powder can effectively reduce the explosion pressure, flame front position, and flame propagation speed. The higher the amount of NaCl powder added, the lower the explosion pressure of magnesium-aluminum alloy powder, the slower the flame propagation speed, and the lower the flame brightness. NaCl adsorbed on Mg-Al alloy powder isolated heat transfer and played a cooling role. The Cl produced by NaCl decomposition will react with the free radicals H and OH in the reaction system, which will reduce the concentration of H and OH in the combustion process and hinder the propagation and expansion of the flame. The research results provide theoretical guidance for the explosion prevention of Mg-Al alloy powder and the preparation of a physical-chemical compound explosion suppressor in the later stage.

摘要

对镁铝合金（Mg-Al）粉末的爆炸超压和火焰传播规律进行了研究，并探讨了氯化钠（NaCl）对镁铝合金粉末爆炸的抑制机理。添加NaCl粉末可有效降低爆炸压力、火焰前沿位置和火焰传播速度。NaCl粉末添加量越高，镁铝合金粉末的爆炸压力越低，火焰传播速度越慢，火焰亮度越低。吸附在Mg-Al合金粉末上的NaCl隔离了热传递并起到冷却作用。NaCl分解产生的Cl会与反应体系中的自由基H和OH发生反应，这会降低燃烧过程中H和OH的浓度，阻碍火焰的传播和扩展。研究结果为镁铝合金粉末的防爆及后期物理-化学复合抑爆剂的制备提供了理论指导。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/1ffca6cf7610/ao3c08242_0009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/8a7799772fae/ao3c08242_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/e473097b0eeb/ao3c08242_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/1b5f9a59fb67/ao3c08242_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/1ffca6cf7610/ao3c08242_0009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/b7202429c00c/ao3c08242_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/1717de3e2bcd/ao3c08242_0002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/a0bfe01de312/ao3c08242_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/c029c551efe3/ao3c08242_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/8a7799772fae/ao3c08242_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/e473097b0eeb/ao3c08242_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/1b5f9a59fb67/ao3c08242_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3823/10882612/1ffca6cf7610/ao3c08242_0009.jpg

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本文引用的文献

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2
Suppression of wood dust explosion by ultrafine magnesium hydroxide.超细氢氧化镁抑制木粉爆炸。
J Hazard Mater. 2019 Oct 15;378:120723. doi: 10.1016/j.jhazmat.2019.05.116. Epub 2019 Jun 7.
3
Effectiveness and mechanism of carbamide/fly ash cenosphere with bilayer spherical shell structure as explosion suppressant of coal dust.
具有双层球壳结构的碳渣/粉煤灰空心微珠作为抑尘剂对煤尘爆炸的有效性和作用机制。
J Hazard Mater. 2019 Mar 5;365:555-564. doi: 10.1016/j.jhazmat.2018.11.044. Epub 2018 Nov 13.
4
Inhibition evaluation of ABC powder in aluminum dust explosion.ABC 粉末对铝粉爆炸抑制效果的评价。
J Hazard Mater. 2019 Jan 5;361:273-282. doi: 10.1016/j.jhazmat.2018.07.045. Epub 2018 Jul 10.
5
Inhibition of aluminum dust explosion by NaHCO with different particle size distributions.不同粒径分布的碳酸氢钠对铝尘爆炸的抑制作用。
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