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Volume 34 Issue 2
Apr 2020
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Chinese Journal of High Pressure Physics  > 2020  >  34(2): 025201.
CAI Chuang, CHEN Xianfeng, YUAN Yalong, HUANG Chuyuan, YUAN Bihe, DAI Huaming. Inhibition of Methane-Air Explosion by C3HF7 under Strong Ignition[J]. Chinese Journal of High Pressure Physics, 2020, 34(2): 025201. doi: 10.11858/gywlxb.20190826
Citation: CAI Chuang, CHEN Xianfeng, YUAN Yalong, HUANG Chuyuan, YUAN Bihe, DAI Huaming. Inhibition of Methane-Air Explosion by C3HF7 under Strong Ignition[J]. Chinese Journal of High Pressure Physics, 2020, 34(2): 025201. doi: 10.11858/gywlxb.20190826
shu

Inhibition of Methane-Air Explosion by C3HF7 under Strong Ignition

doi: 10.11858/gywlxb.20190826
  • 1.

    School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan 430070, Hubei, China

  • 2.

    Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan University of Science and Technology, Wuhan 430081, Hubei, China

  • Received Date: 23 Aug 2019
  • Rev Recd Date: 17 Sep 2019
  • Issue Publish Date: 25 Dec 2019
    Abstract
  • In this work we carried out research on the anti-explosion effect of heptafluoropropane in the process of methane-air premixed gas explosion propagation in equivalent ratio, in order to solve the explosion accidents in the process of gas transportation. This experiment used a horizontal pipeline explosion characteristic test system with an aspect ratio of L/D=108, studied the effects of different volume fractions of heptafluoropropane on the maximum explosion pressure, maximum pressure rise rate and flame propagation velocity of 9.5% methane-air premixed gas under strong ignition. The experimental results show that when the 2.5 m long pipe section is used as the heptafluoropropane explosion suppression zone, the minimum volume fraction of heptafluoropropane which can suppress the 9.5% methane-air premixed gas explosion flame propagation is 5%; when the concentration of heptafluoropropane is 1% to 4%, the propagation of the explosion flame cannot be suppressed, and the flame propagation speed is accelerated compared with the control group; when the concentration of heptafluoropropane is 1% to 6%, the peak value of the explosion pressure at the source of explosion and end of pipe gradually decreases with the increase of the concentration of heptafluoropropane; when the concentration of heptafluoropropane is 3%, the peak value of the explosion pressure at the explosion suppression zone increase by 10.9% compared with the control group.

     

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