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Volume 33 Issue 4
Jul 2019
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Chinese Journal of High Pressure Physics  > 2019  >  33(4): 045203.
BAI Gang, ZHOU Xihua, SONG Dongping. Experimental Study on the Coupling Influence of Temperature and CO Concentration on CH4 Explosion Limit[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 045203. doi: 10.11858/gywlxb.20180612
Citation: BAI Gang, ZHOU Xihua, SONG Dongping. Experimental Study on the Coupling Influence of Temperature and CO Concentration on CH4 Explosion Limit[J]. Chinese Journal of High Pressure Physics, 2019, 33(4): 045203. doi: 10.11858/gywlxb.20180612
shu

Experimental Study on the Coupling Influence of Temperature and CO Concentration on CH4 Explosion Limit

doi: 10.11858/gywlxb.20180612
  • 1.

    College of Safety Science & Engineering, Liaoning Technical University, Fuxin 123000, China

  • 2.

    Key Laboratory of Mine Thermodynamic Disasters & Control of Ministry of Education(Liaoning Technical University), Fuxin 123000, China

  • Received Date: 09 Aug 2018
  • Rev Recd Date: 26 Aug 2018
  • Publish Date: 25 Apr 2018
    Abstract
  • Gas explosion often occurs in the course of closing fired coal mine. The explosion limit and maximum explosion pressure under temperatures ranging from 25 ℃ to 200 ℃ and CO volume fractions of 1%−10% are studied by using a special 20 L explosive device. The results show that upper and lower explosion limits all decrease with increasing CO volume fraction, the range of explosion limit is widened in the presence of only CO. The upper gas explosive limit increases while its lower limit decreases as temperature increases. At ambient pressure, the upper gas explosive limit increases quadratically with initial temperature while the lower limit increases logarithmically with initial temperature. Increasing CO volume fraction results in increase in both the upper pressure limit and the lower pressure limit. Coupling CO gas with high temperature, the gas explosive upper limit increases and the lower limit decreases thus higher risk is expected in such condition. Explosive limits, especially the upper limit are more sensitive to coupling factors than to single factor.

     

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