Explosion severity parameters of hybrid mixture of methane and lycopodium dust

YU Jianliang; SUN Huili; JI Wentao; YAN Xingqing; ZHANG Xinyan; CAI Linfeng

doi:10.11883/bzycj-2016-0276

Volume 38 Issue 1

Nov. 2017

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YU Jianliang, SUN Huili, JI Wentao, YAN Xingqing, ZHANG Xinyan, CAI Linfeng. Explosion severity parameters of hybrid mixture of methane and lycopodium dust[J]. Explosion And Shock Waves, 2018, 38(1): 92-97. doi: 10.11883/bzycj-2016-0276

Citation:

YU Jianliang, SUN Huili, JI Wentao, YAN Xingqing, ZHANG Xinyan, CAI Linfeng. Explosion severity parameters of hybrid mixture of methane and lycopodium dust[J]. Explosion And Shock Waves, 2018, 38(1): 92-97. doi: 10.11883/bzycj-2016-0276

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Explosion severity parameters of hybrid mixture of methane and lycopodium dust

doi: 10.11883/bzycj-2016-0276

School of Chemical Machinery and Safety Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

Received Date: 2016-09-09
Rev Recd Date: 2016-12-13
Publish Date: 2018-01-25

Abstract

Abstract

A modified 20 L standard spherical dust explosion vessel was used to systematically study the explosion characteristics of the methane/lycopodium hybrid mixtures. The explosion pressure (p_ex), the explosion pressure rise rate (dp/dt)_ex and the explosive deflagration index (K_st) of the single-phase methane, the single-phase lycopodium dust, and the methane/lycopodium hybrid mixtures were measured under the same initial conditions. The results showed that methane could obviously enhance the explosion pressure p_ex of low-concentration lycopodium dust but reduce the p_ex of high-concentration lycopodium dust. It was proved that methane had no significant effects on the maximum explosion pressure p_max of lycopodium dust. But it could significantly increase the maximum explosion pressure rise rate (dp/dt)_max. By evaluating the K_st, it was found that the explosive deflagration index of the methane/lycopodium hybrid mixtures was higher than that of single-phase lycopodium dust. However, the explosive deflagration indices of both methane/lycopodium hybrid mixtures and single-phase lycopodium dusts were lower than that of single-phase methane. Therefore, the coexistence of combustible gas and combustible dust in industrial production process should be avoided to reduce the risk of dust explosions.
- dust explosion,
- hybrid mixtures,
- explosion severity,
- methane,
- lycopodium

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References(18)

References

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