Effect and mechanism of KH2PO4/SiO2 composite powder in inhibiting aluminum dust deflagration

YAN Ke; MENG Xiangbao; PAN Zhichao; WANG Zheng; ZHANG Yansong

doi:10.11883/bzycj-2021-0190

Volume 42 Issue 6

Jun. 2022

Turn off MathJax

Article Contents

Article Navigation > Explosion And Shock Waves > 2022 > 42(6): 062101

YAN Ke, MENG Xiangbao, PAN Zhichao, WANG Zheng, ZHANG Yansong. Effect and mechanism of KH2PO4/SiO2 composite powder in inhibiting aluminum dust deflagration[J]. Explosion And Shock Waves, 2022, 42(6): 062101. doi: 10.11883/bzycj-2021-0190

Citation:

YAN Ke, MENG Xiangbao, PAN Zhichao, WANG Zheng, ZHANG Yansong. Effect and mechanism of KH₂PO₄/SiO₂ composite powder in inhibiting aluminum dust deflagration[J]. Explosion And Shock Waves, 2022, 42(6): 062101. doi: 10.11883/bzycj-2021-0190

Citation:

PDF( 14526 KB)

Effect and mechanism of KH₂PO₄/SiO₂ composite powder in inhibiting aluminum dust deflagration

doi: 10.11883/bzycj-2021-0190

YAN Ke^1
,,
MENG Xiangbao^{1, 2, 3
,
,},
PAN Zhichao¹,
WANG Zheng¹,
ZHANG Yansong^{1, 2, 3}

1.
College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China
2.
Qingdao Intelligent Control Engineering Center for Production Safety Fire Accident, Shandong University of Science and Technology, Qingdao 266590, Shandong, China
3.
Institute of Public Safety, Shandong University of Science and Technology, Qingdao 266590, Shandong, China

Received Date: 2021-05-14
Rev Recd Date: 2021-07-20

Available Online: 2022-05-17

Publish Date: 2022-06-24

Abstract

Abstract

To expand the application field of environmental protection materials, a composite powder explosion inhibitor was developed to suppress the explosion disaster of aluminum powder. The KH₂PO₄/SiO₂ composite powder explosion inhibitor, a new type of explosion inhibitors, was prepared by grinding KH₂PO₄ and SiO₂ using a ball mill and used to study its inhibition effect on aluminum powder deflagration. The deflagration flame propagation inhibition experiments were carried out in a Hartmann tube experimental device. The results show that the propagation length and speed of the deflagration flame gradually decrease with the increase of the KH₂PO₄/SiO₂ composite powder explosion inhibitor content. When a KH₂PO₄/SiO₂ composite powder explosion inhibitor with the mass ratio of 10∶6 is added, the deflagration flame propagation inhibition of the aluminum powder can be realized. The pressure test experiments of the composite powder explosion inhibitor to inhibit the aluminum powder explosion were carried out in a 20-L spherical explosive device. The results show that the maximum explosion pressure (p_max) and maximum explosion pressure rise rate ((dp/dt)_max) of the aluminum powder explosion gradually decrease with the content of the KH₂PO₄/SiO₂ composite powder explosion inhibitor. When a KH₂PO₄/SiO₂ composite powder explosion inhibitor with the mass ratio of 10∶9 is added, the complete inhibition of aluminum powder deflagration can be realized. By comparison with the KH₂PO₄ powder, SiO₂ powder and composite powder explosion inhibitors, the inhibition effect of the composite powder explosion inhibitor on the flame propagation and explosion pressure of the aluminum powder is better than that of monomer powder explosion inhibitors. Through the thermogravimetric analysis of aluminum powder and KH₂PO₄, the inhibition mechanism of the KH₂PO₄/SiO₂ composite powder explosion inhibitor on aluminum powder deflagration was analyzed from both chemical and physical aspects. The KH₂PO₄ attached to the surface of composite powder explosion inhibitor absorbs heat rapidly, and the volatile participates in the explosion and combustion reaction of aluminum powder, which significantly reduces the maximum volatile content (dp/dt)_max. The SiO₂ affects the heat transfer of aluminum powder explosion and combustion, resulting in incomplete combustion and p_max reduction.
- KH₂PO₄/SiO₂ composite powder,
- aluminum dust explosion,
- deflagration characteristics,
- inhibition mechanism

FullText(HTML)

References(27)

References

[1]	MARMO L, CAVALLERO D, DEBERNARDI M L. Aluminium dust explosion risk analysis in metal workings [J]. Journal of Loss Prevention in the Process Industries, 2004, 17(6): 449–465. DOI: 10.1016/j.jlp.2004.07.004.
[2]	JOSEPH G. Combustible dusts: a serious industrial hazard [J]. Journal of Hazardous Materials, 2007, 142(3): 589–591. DOI: 10.1016/j.jhazmat.2006.06.127.
[3]	文虎, 杨玉峰, 王秋红, 等. 矩形管道中微米级铝粉爆炸实验 [J]. 爆炸与冲击, 2018, 38(5): 993–998. DOI: 10.11883/bzycj-2016-0003. WEN H, YANG Y F, WANG Q H, et al. Experimental study on micron-sized aluminum dust explosion in a rectangular pipe [J]. Explosion and Shock Waves, 2018, 38(5): 993–998. DOI: 10.11883/bzycj-2016-0003.
[4]	杜宇婷, 司荣军, 薛少谦. 铝粉爆炸无火焰泄压技术及装备研究 [J]. 中国安全生产科学技术, 2020, 16(4): 132–136. DOI: 10.11731/j.issn.1673-193x.2020.04.021. DU Y T, SI R J, XUE S Q. Research on flameless venting technology and device for aluminum dust explosion [J]. Journal of Safety Science and Technology, 2020, 16(4): 132–136. DOI: 10.11731/j.issn.1673-193x.2020.04.021.
[5]	CHEN H Y, ZHANG Y S, LIU H, et al. Cause analysis and safety evaluation of aluminum powder explosion on the basis of catastrophe theory [J]. Journal of Loss Prevention in the Process Industries, 2018, 55: 19–24. DOI: 10.1016/j.jlp.2018.05.017.
[6]	朱小超, 郑立刚, 于水军, 等. 阻塞比对竖直管道中铝粉爆炸特性的影响研究 [J]. 爆炸与冲击, 2019, 39(10): 105402. DOI: 10.11883/bzycj-2019-0006. ZHU X C, ZHENG L G, YU S J, et al. Effect of blocking ratio on aluminum powder explosion’s characteristics in vertical duct [J]. Explosion and Shock Waves, 2019, 39(10): 105402. DOI: 10.11883/bzycj-2019-0006.
[7]	NI X M, KUANG K Q, YANG D L, et al. A new type of fire suppressant powder of NaHCO₃/zeolite nanocomposites with core-shell structure [J]. Fire Safety Journal, 2009, 44(7): 968–975. DOI: 10.1016/j.firesaf.2009.06.004.
[8]	左前明, 程卫民, 邹冠贵, 等. 协同增效原理在煤尘抑爆剂中的应用实验 [J]. 重庆大学学报, 2012, 35(1): 105–109,116. DOI: 10.11835/j.issn.1000-582x.2012.01.020. ZUO Q M, CHENG W M, ZOU G G, et al. Applied experiments on coal dust inhibitor based on the theory of synergistic effect [J]. Journal of Chongqing University, 2012, 35(1): 105–109,116. DOI: 10.11835/j.issn.1000-582x.2012.01.020.
[9]	KRASNYANSKY M. Prevention and suppression of explosions in gas-air and dust-air mixtures using powder aerosol-inhibitor [J]. Journal of Loss Prevention in the Process Industries, 2006, 19(6): 729–735. DOI: 10.1016/j.jlp.2006.05.004.
[10]	WANG Y, CHENG Y S, YU M G, et al. Methane explosion suppression characteristics based on the NaHCO₃/red-mud composite powders with core-shell structure [J]. Journal of Hazardous Materials, 2017, 335: 84–91. DOI: 10.1016/j.jhazmat.2017.04.031.
[11]	YAN K, MENG X B. An investigation on the aluminum dustexplosion suppression efficiency and mechanism of a NaHCO₃/DE composite powder [J]. Advanced Powder Technology, 2020, 31(8): 3246–3255. DOI: 10.1016/j.apt.2020.06.014.
[12]	LUO Z M, WANG T, TIAN Z H, et al. Experimental study on the suppression of gas explosion using the gas-solid suppressant of CO₂/ABC powder [J]. Journal of Loss Prevention in the Process Industries, 2014, 30: 17–23. DOI: 10.1016/j.jlp.2014.04.006.
[13]	LI Q Z, LIN B Q, LI W X, et al. Explosion characteristics of nano-aluminum powder-air mixtures in 20 L spherical vessels [J]. Powder Technology, 2011, 212(2): 303–309. DOI: 10.1016/j.powtec.2011.04.038.
[14]	XIAO Q, LIU B, MA X S, et al. An experimental investigation on the ignition sensitivity and flame propagation behavior of mixed oil shale-coal dust [J]. Combustion Science and Technology, 2021, 193(8): 1359–1377. DOI: 10.1080/00102202.2019.1695606.
[15]	CHEN Z H, FAN B C, JIANG X H. Suppression effects of powder suppressants on the explosions of oxyhydrogen gas [J]. Journal of Loss Prevention in the Process Industries, 2006, 19(6): 648–655. DOI: 10.1016/j.jlp.2006.03.006.
[16]	王秋红, 申中一, 王清峰. 抑制铝粉尘云爆炸的粉体材料效能对比分析 [J]. 中南大学学报(自然科学版), 2020, 51(4): 922–930. DOI: 10.11817/j.issn.1672-7207.2020.04.007. WANG Q H, SHEN Z Y, WANG Q F. Comparative analysis of the effectiveness of powder materials on suppressing aluminum dust cloud explosion [J]. Journal of Central South University (Science and Technology), 2020, 51(4): 922–930. DOI: 10.11817/j.issn.1672-7207.2020.04.007.
[17]	WANG Z, MENG X B, YAN K, et al. Inhibition effects of Al(OH)₃ and Mg(OH)₂ on Al-Mg alloy dust explosion [J]. Journal of Loss Prevention in the Process Industries, 2020, 66: 104206. DOI: 10.1016/j.jlp.2020.104206.
[18]	YU X Z, YU J L, ZHANG X Y, et al. Combustion behaviors and residues characteristics in hydrogen/aluminum dust hybrid explosions [J]. Process Safety and Environmental Protection, 2020, 134: 343–352. DOI: 10.1016/j.psep.2019.12.023.
[19]	陈曦, 陈先锋, 张洪铭, 等. 惰化剂粒径对铝粉火焰传播特性影响的实验研究 [J]. 爆炸与冲击, 2017, 37(4): 759–765. DOI: 10.11883/1001-1455(2017)04-0759-07. CHEN X, CHEN X F, ZHANG H M, et al. Effects of inerting agent with different particle sizes on the flame propagation of aluminum dust [J]. Explosion and Shock Waves, 2017, 37(4): 759–765. DOI: 10.11883/1001-1455(2017)04-0759-07.
[20]	国家技术监督局. 粉尘云最小点火能测试方法双层振动筛落法(积分计算能量): GB/T 15929–1995 [S]. 北京: 中国标准出版社, 1995.
[21]	国家技术监督局. 粉尘云最小着火能量测定方法: GB/T 16428–1996 [S]. 北京: 中国标准出版社, 1996.
[22]	WANG J F, ZHANG Y S, SU H F, et al. Explosion characteristics and flame propagation behavior of mixed dust cloud of coal dust and oil shale dust [J]. Energies, 2019, 12(20): 3807. DOI: 10.3390/en12203807.
[23]	WANG J F, MENG X B, MA X S, et al. Experimental study on whether and how particle size affects the flame propagation and explosibility of oil shale dust [J]. Process Safety Progress, 2019, 38(3): e12075. DOI: 10.1002/prs.12075.
[24]	国家市场监督管理总局, 国家标准化管理委员会. 粉尘云爆炸下限浓度测定方法: GB/T 16425–2018 [S]. 北京: 中国标准出版社, 2018.
[25]	国家技术监督局. 粉尘云最大爆炸压力和最大压力上升速率测定方法: GB/T 16426–1996 [S]. 北京: 中国标准出版社, 1997.
[26]	林柏泉, 梅晓凝, 王可, 等. 基于20L球形爆炸装置的微米级铝粉爆炸特性实验 [J]. 北京理工大学学报, 2016, 36(7): 661–667. DOI: 10.15918/j.tbit1001-0645.2016.07.001. LIN B Q, MEI X N, WANG K, et al. Explosion characteristics of micro-aluminum powders in 20 L spherical vessels [J]. Transactions of Beijing Institute of Technology, 2016, 36(7): 661–667. DOI: 10.15918/j.tbit1001-0645.2016.07.001.
[27]	陈晓坤, 张自军, 王秋红, 等. 20 L近球形容器中微米级铝粉的爆炸特性 [J]. 爆炸与冲击, 2018, 38(5): 1130–1136. DOI: 10.11883/bzycj-2017-0101. CHEN X K, ZHANG Z J, WANG Q H, et al. Explosion characteristics of micro-sized aluminum dust in 20 L spherical vessel [J]. Explosion and Shock Waves, 2018, 38(5): 1130–1136. DOI: 10.11883/bzycj-2017-0101.