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首页> 外文期刊>Journal of Hazardous Materials >Experimental study and mechanism model on the ignition sensitivity of typical organic dust clouds in O_2/N_2, O_2/Ar and O_2/CO_2 atmospheres
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Experimental study and mechanism model on the ignition sensitivity of typical organic dust clouds in O_2/N_2, O_2/Ar and O_2/CO_2 atmospheres

机译：O_2 / N_2，O_2 / AR和O_2 / CO_2大气压典型有机粉尘点火敏感性的实验研究与机制模型

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摘要

To reveal and improve our understanding of the ignition behavior and mechanism, G-G furnace experiments of three typical organic dusts were performed to investigate the minimum ignition temperature (MIT) in O2/N2, O2/ Ar and O2/CO2 atmospheres with oxygen mole fraction from 8.4% to 50%. The experimental results were presented in oxygen-lean and oxy-fuel atmospheres to evaluate the ignition sensitivity of dusts in different atmospheres. It was found that CO2 is the strongest in terms of lowing the ignition sensitivity of the three dusts, and the dust explosion risk increases significantly with increasing O2 mole fraction for the three dusts through a logarithmically and significantly reducing MIT. However, for different dusts, inert gases show different suppression effects. In addition, a modified steady-state homogeneous ignition model was proposed and successfully applied to oxygen-lean atmospheres, and in oxy-fuel atmospheres, this model has also been improved to estimate the ignition mechanism. This ignition mechanism model could be used to successfully predict the minimum ignition temperature of high volatile dust under different inert atmospheres controlled by homogeneous ignition, which will provide a reference for the ignition hazard assessment of dust on hot surfaces.
机译：为了揭示和改善我们对点火行为和机理的理解，进行三种典型有机粉尘的GG炉实验，以研究O2 / N2，O2 / AR和O2 / CO2大气中的最小点火温度（MIT），其中氧气摩尔分数8.4％至50％。实验结果呈氧 - 稀氧和氧燃料氛围，以评估不同大气中粉尘的点火敏感性。发现CO2是在降低三种粉尘的点火敏感度方面最强，并且粉尘爆炸风险随着三种粉尘的增加，通过对数和显着减少麻省理工学院而增加了三种粉尘。然而，对于不同的粉尘，惰性气体显示出不同的抑制作用。此外，提出了一种改进的稳态均匀点火模型并成功地应用于氧贫气氛，并且在氧气燃料环境中，该模型也得到了改进以估计点火机制。该点火机构模型可用于成功预测由均匀点火控制的不同惰性气氛下的高挥发性粉尘的最小点火温度，这将为热表面上的灰尘进行点火危害评估提供参考。

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  • 来源
    《Journal of Hazardous Materials》 |2021年第15期|125108.1-125108.11|共11页
  • 作者

    Wang Dan; Ji Tingchao; Jing Qi; He Wei; Fan Zeyuan; Wu Dejian; Qian Xinming;

  • 作者单位

    Beijing Inst Technol State Key Lab Explos Sci & Technol Room 315 5 South Zhongguancun St Beijing 100081 Peoples R China;

    China Acad Elect & Informat Technol Beijing 100041 Peoples R China;

    Beijing Inst Technol State Key Lab Explos Sci & Technol Room 315 5 South Zhongguancun St Beijing 100081 Peoples R China;

    Beijing Inst Technol State Key Lab Explos Sci & Technol Room 315 5 South Zhongguancun St Beijing 100081 Peoples R China;

    Beijing Inst Technol State Key Lab Explos Sci & Technol Room 315 5 South Zhongguancun St Beijing 100081 Peoples R China;

    Div Explos Protect Gases & Dusts Bundesanstalt Ma Unter Eichen 87 D-12205 Berlin Germany;

    Beijing Inst Technol State Key Lab Explos Sci & Technol Room 315 5 South Zhongguancun St Beijing 100081 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Minimum ignition temperature; Ignition behavior; O2; CO2 atmospheres; Ignition mechanism;

    机译：最小点火温度;点火行为;O2;CO2大气压;点火机制;

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