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首页> 外文期刊>Journal of loss prevention in the process industries >Effects of a carbon monoxide-dominant gas mixture on the explosion and flame propagation behaviors of methane in air
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Effects of a carbon monoxide-dominant gas mixture on the explosion and flame propagation behaviors of methane in air

机译：一氧化碳 - 主要气体混合物对空气中甲烷爆炸和火焰繁殖行为的影响

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摘要

This work aimed to experimentally evaluate the effects of a carbon monoxide-dominant gas mixture on the explosion characteristics of methane in air and report the results of an experimental study on explosion pressure measurement in closed vessel deflagration for a carbon monoxide-dominant gas mixture over its entire flammable range. Experiments were performed in a 20-L spherical explosion tank with a quartz glass window 110 mm in diameter using an electric spark (1 J) as the ignition source. All experiments were conducted at room temperature and at ambient pressure, with a relative humidity ranging from 52 to 73%. The peak explosion pressure (P-max), maximum pressure rise rate ((dp/dt)(max)), and gas deflagration index (K-G) were observed and analyzed. The flame propagation behavior in the initial stage was recorded using a high-speed camera. The spherical outward flame front was determined on the basis of a canny method, from which the maximum flame propagation speed (S-n) was calculated. The results indicated that the existence of the mixture had a significant effect on the flame propagation of CH4-air and increased its explosion risk. As the volume fraction of the mixed gas increases, the P-max (dp/dt)(max), K-G and S-n of the fuel-lean CH4-air mixture (7% CH4-air mixture) increase nonlinearly. In contrast, addition of the mixed gas negatively affected the fuel-rich mixture (11% CH4-air mixture), exhibiting a decreasing trend. Under stoichiometric conditions (9.5% CH4-air mixture), the mixed gas slightly lowered P-max, (dp/dt)(max), K-G, and S-n. The P-max of CH4-air mixtures at volume fractions of 7%, 9.5%, and 11% were 5.4, 6.9, and 6.8 bar, respectively. The S-n of CH4-air mixtures at volume fractions of 7%, 9.5%, and 11% were 1.2 m/s, 2.0 m/s, and 1.8 m/s, respectively. The outcome of the study is comprehensive data that quantify the dependency of explosion severity parameters on the gas concentration. In the storage and transportation of flammable gases, the information is required to quantify the potential severity of an explosion, design vessels able to withstand an explosion and design explosion safety measures for installations handling this gas.
机译：这项工作旨在通过实验评价一氧化碳优势气体混合物对空气中甲烷爆炸特性的影响，并报告封闭血管爆发中爆炸压力测量的实验研究结果在其上整个易燃范围。在20-L球形爆炸罐中进行实验，其具有直径的石英玻璃窗口110mm，使用电火花（1J）作为点火源。所有实验均在室温和环境压力下进行，相对湿度范围为52至73％。观察和分析峰值爆炸压力（P-MAX），最大压力上升速率（（DP / DT））和气体净化指数（K-G）。使用高速相机记录初始阶段中的火焰传播行为。基于罐的方法确定球形向外火焰前沿，从中计算最大火焰传播速度（S-N）。结果表明，该混合物的存在对CH4 - 空气的火焰繁殖并增加了爆炸风险的显着影响。随着混合气体的体积分数增加，燃料 - 稀Ch4 - 空气混合物（7％CH 4 - 空气混合物）的P-MAX（DP / DT），K-G和S-N是非线性的。相比之下，加入混合气体对富含燃料的混合物（11％CH4 - 空气混合物）负面影响，表现出降低趋势。在化学计量条件下（9.5％CH4 - 空气混合物），混合气体略微降低P-MAX，（DP / DT）（MAX），K-G和S-N。体积分数为7％，9.5％和11％的CH 4空气混合物的P-MAX分别为5.4,6.9和6.8巴。体积分数为7％，9.5％和11％的CH 4空气混合物的S-N分别为1.2m / s，2.0m / s和1.8 m / s。该研究的结果是全面数据，其量化爆炸严重程度参数对气体浓度的依赖性。在易燃气体的储存和运输中，这些信息是量化爆炸的潜在严重程度，设计船舶能够承受爆炸和设计爆炸安全措施，用于处理这种气体的安装。

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  • 作者

    Luo Zhenmin; Liu Litao; Cheng Fangming; Wang Tao; Su Bin; Zhang Jiang; Gao Shuaishuai; Wang Chao;

  • 作者单位

    Xian Univ Sci &

    Technol Sch Safety Sci &

    Engn Shaanxi Key Lab Prevent &

    Control Coal Fire 58 Yanta Mid Rd Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci &

    Technol Sch Safety Sci &

    Engn Shaanxi Key Lab Prevent &

    Control Coal Fire 58 Yanta Mid Rd Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci &

    Technol Sch Safety Sci &

    Engn Shaanxi Key Lab Prevent &

    Control Coal Fire 58 Yanta Mid Rd Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci &

    Technol Sch Safety Sci &

    Engn Shaanxi Key Lab Prevent &

    Control Coal Fire 58 Yanta Mid Rd Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci &

    Technol Sch Safety Sci &

    Engn Shaanxi Key Lab Prevent &

    Control Coal Fire 58 Yanta Mid Rd Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci &

    Technol Sch Safety Sci &

    Engn Shaanxi Key Lab Prevent &

    Control Coal Fire 58 Yanta Mid Rd Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci &

    Technol Sch Safety Sci &

    Engn Shaanxi Key Lab Prevent &

    Control Coal Fire 58 Yanta Mid Rd Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci &

    Technol Sch Safety Sci &

    Engn Shaanxi Key Lab Prevent &

    Control Coal Fire 58 Yanta Mid Rd Xian 710054 Shaanxi Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 安全管理（劳动保护管理）;
  • 关键词

    Methane-air explosion; Peak explosion pressure; Deflagration index; Spherical outward flame propagation; Maximum flame propagation speed; Gas storage;

    机译：甲烷 - 空气爆炸;峰值爆炸压力;爆燃指数;球形向外火焰传播;最大火焰传播速度;储气;

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