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KH2PO4/SiO2复合粉体抑制铝粉爆燃效果及机理分析

颜轲 孟祥豹 潘智超 王政 张延松

颜轲, 孟祥豹, 潘智超, 王政, 张延松. KH2PO4/SiO2复合粉体抑制铝粉爆燃效果及机理分析[J]. 爆炸与冲击, 2022, 42(6): 062101. doi: 10.11883/bzycj-2021-0190
引用本文: 颜轲, 孟祥豹, 潘智超, 王政, 张延松. KH2PO4/SiO2复合粉体抑制铝粉爆燃效果及机理分析[J]. 爆炸与冲击, 2022, 42(6): 062101. doi: 10.11883/bzycj-2021-0190
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

KH2PO4/SiO2复合粉体抑制铝粉爆燃效果及机理分析

doi: 10.11883/bzycj-2021-0190
基金项目: 国家自然科学基金(52074174)
详细信息
    作者简介:

    颜 轲(1997-  ),男,硕士,yanke19970325@163.com

    通讯作者:

    孟祥豹(1980-  ),男,博士,副教授,mxb@sdust.edu.cn

  • 中图分类号: O381

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

  • 摘要: 为研究KH2PO4/SiO2复合粉体抑爆剂对铝粉爆燃的抑制作用,采用球磨机将KH2PO4和SiO2混合研磨制备出新型的KH2PO4/SiO2复合粉体抑爆剂。在哈特曼管实验装置上,开展爆燃火焰传播抑制实验,结果表明:随着KH2PO4/SiO2复合粉体抑爆剂含量的增加,爆燃火焰传播长度和速度逐渐减小,当添加质量比10∶6的KH2PO4/SiO2复合粉体抑爆剂时,可实现铝粉爆燃火焰传播的抑制。在20 L球形爆炸装置上,开展复合粉体抑爆剂抑制铝粉爆炸压力测试实验,结果表明:随着KH2PO4/SiO2复合粉体抑爆剂含量的增加,铝粉爆炸最大爆炸压力pmax和最大爆炸压力上升速率(dp/dt)max逐渐减小,当添加质量比10∶9的KH2PO4/SiO2复合粉体抑爆剂时,可实现铝粉爆燃的完全抑制。通过KH2PO4粉体、SiO2粉体与复合粉体抑爆剂对比可知,复合粉体抑爆剂对铝粉火焰传播和爆炸压力的抑制效果都优于单体粉体抑爆剂。通过对铝粉在空气中燃烧的热分析研究,从化学和物理两个方面分析了KH2PO4/SiO2复合粉体抑爆剂对铝粉爆燃的抑制机理。
  • 图  1  哈特曼管实验装置

    Figure  1.  The Hartmann tube experimental device

    图  2  20 L球形爆炸实验装置

    Figure  2.  The 20-L spherical explosion experimental device

    图  3  铝粉颗粒的粒度分布

    Figure  3.  Particle size distributions of the solid aluminum powder

    图  4  铝粉的SEM和EDS图像

    Figure  4.  SEM and EDS images of the aluminum powder

    图  5  不同质量比KH2PO4/SiO2复合粉末的SEM图像

    Figure  5.  SEM images of the KH2PO4/SiO2 composite powders with different mass ratios

    图  6  KH2PO4/SiO2复合粉体的EDS能谱

    Figure  6.  EDS spectra of the KH2PO4/SiO2 composite powder

    图  7  升温速率为10 ℃/min时铝粉和KH2PO4粉末的热重分析

    Figure  7.  Thermogravimetric analysis of the aluminum powder and KH2PO4 powder at the heating rate of 10 °C/min

    图  8  铝粉爆燃的火焰传播过程

    Figure  8.  Propagation process of the aluminum powder deflagration flame

    图  9  纯铝粉和不同质量比复合粉体抑爆剂抑制铝粉爆燃的火焰传播过程

    Figure  9.  The propagation process of the aluminum powder deflagration flame with or without explosion inhibitors

    图  10  铝粉爆燃火焰传播的峰值速度和平均速度

    Figure  10.  Peak velocities and average velocities of aluminum powder deflagration flame propagations

    图  11  铝粉爆炸压力典型曲线

    Figure  11.  A typical explosion pressure curve of aluminum powder

    图  12  添加不同抑爆剂对铝粉爆炸压力曲线的影响

    Figure  12.  Explosion pressure curves of the aluminum powders with different explosion inhibitors

    图  13  添加不同抑爆剂对铝粉爆炸最大爆炸压力和最大升压速率压力的影响

    Figure  13.  Maximum explosion pressures and maximum pressure rise rates of the aluminum powders with different explosion inhibitors

    图  14  复合粉体抑爆剂抑制铝粉爆燃反应的机理

    Figure  14.  The mechanism of composite powder explosion inhibitor inhibiting aluminum powder deflagration reaction

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出版历程
  • 收稿日期:  2021-05-14
  • 修回日期:  2021-07-20
  • 网络出版日期:  2022-05-17
  • 刊出日期:  2022-06-24

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