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Hydrogen inhibition in a wet aluminum dust collection system using dichromate solution

机译：使用二甲酸酯溶液湿铝除尘系统中的氢抑制

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摘要

Wet dust collection systems are used worldwide for aluminum dust treatment. However, these systems pose a risk of hydrogen fire and explosion because of the reaction between aluminum dust and water produce hydrogen. This study undertakes a field survey of the wet dust collection system in an atomized aluminum powder production enterprise in China. A hydrogen inhibition method (HIM) was proposed to inhibit hydrogen production. Hydrogen production inhibition tests were conducted using specialized equipment developed by the authors. The experimental data showed that the HIM effectively inhibited the reaction between aluminum and water. To study the changes in the aluminum particles before and after application of the HIM, scanning electron microscopy (SEM) was used to characterize the morphological changes in the aluminum powder. Energy-dispersive X-ray spectroscopy (EDS) revealed that Cr was evenly distributed around the aluminum particles, indicating that the inhibition film evenly covered these particles. X-ray photoelectron spectroscopy (XPS) was used to test the valence of Cr in the inhibition film, and X-ray diffraction (XRD) was used to analyze the chemical composition of the film after the HIM treatment. The results showed that Cr(OH)(3) and Al(OH)(3) were widely distributed in the inhibition film, confirming the effectiveness of the HIM. The reaction mechanism between the aluminum dust and dichromate solutions was discussed, and a chemical reaction kinetics model of the hydrogen production inhibition was established. The environmental issues regarding the use of dichromate solutions were discussed. Using HIM achieved the maximum reduction in the cost of the wet dust collection-system-and-in-the-hydrogen-fire-or-explosion-risk.
机译：湿式粉尘收集系统在全球范围内用于铝粉处理。然而，由于铝粉尘和水产生氢气之间的反应，这些系统造成了氢气和爆炸的风险。本研究对中国雾化铝粉生产企业湿式粉尘收集系统进行了现场调查。提出了一种氢抑制方法（HIM）以抑制氢气产生。使用作者开发的专用设备进行氢生产抑制试验。实验数据表明，他有效地抑制了铝和水之间的反应。为了在施加他之前和之后的铝颗粒的变化，使用扫描电子显微镜（SEM）来表征铝粉中的形态变化。能量分散X射线光谱（EDS）显示CR均匀地分布在铝颗粒周围，表明抑制膜均匀地覆盖这些颗粒。 X射线光电子能谱（XPS）用于测试抑制膜中Cr的价值，并使用X射线衍射（XRD）分析他治疗后膜的化学成分。结果表明，Cr（OH）（3）和Al（OH）（3）广泛分布在抑制膜中，证实了他的有效性。讨论了铝粉尘和二聚体溶液之间的反应机制，建立了氢生产抑制的化学反应动力学模型。讨论了关于使用二分甲酸盐溶液的环境问题。使用他实现了湿法收集系统和氢气 - 爆炸或爆炸风险成本的最大降低。

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  • 来源
    《RSC Advances》 |2017年第76期|共10页
  • 作者

    Wang Yantong; Xu Kaili; Wang Ben; Zhang Jinjia;

  • 作者单位

    Northeastern Univ Coll Resource &

    Civil Engn Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Coll Resource &

    Civil Engn Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Coll Resource &

    Civil Engn Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Coll Resource &

    Civil Engn Shenyang 110819 Liaoning Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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