Explosion hazard in the concentrated ventilation tube for a group of diesel tanks and its suppression technologies

SUN Xuxu; GUO Jin; LU Shouxiang

doi:10.11883/bzycj-2020-0131

Volume 41 Issue 5

May 2021

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SUN Xuxu, GUO Jin, LU Shouxiang. Explosion hazard in the concentrated ventilation tube for a group of diesel tanks and its suppression technologies[J]. Explosion And Shock Waves, 2021, 41(5): 055401. doi: 10.11883/bzycj-2020-0131

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SUN Xuxu, GUO Jin, LU Shouxiang. Explosion hazard in the concentrated ventilation tube for a group of diesel tanks and its suppression technologies[J]. Explosion And Shock Waves, 2021, 41(5): 055401. doi: 10.11883/bzycj-2020-0131

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Explosion hazard in the concentrated ventilation tube for a group of diesel tanks and its suppression technologies

doi: 10.11883/bzycj-2020-0131

SUN Xuxu^1
,,
GUO Jin²,
LU Shouxiang^{1
,
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1.
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230027, Anhui, China
2.
College of Environment and Resources, Fuzhou University, Fuzhou 350108, Fujian, China

Received Date: 2020-05-06
Rev Recd Date: 2021-03-02

Available Online: 2021-04-21

Publish Date: 2021-05-05

Abstract

Abstract

In this study, the explosion hazard and suppression technology were investigated in a concentrated ventilation tube filled with diesel fuel under room temperature and environmental pressure. A high-speed camera (model: nac HX-3) and pressure sensors (model: CY-YD-205) were used to record the flame picture and explosion overpressure. New explosion suppression balls and an ordinary corrugated flame arrester were employed as explosion suppression apparatuses. The results indicate that the explosion flame can propagate into the adjacent fuel tank through the ventilation tube under room temperature and environmental pressure, causing the second explosion. In addition, the ordinary corrugated flame arrester fails to suppress explosion, and the new explosion suppression balls have better anti-explosion effect. Compared to the case of a smooth ventilation tube, the maximum explosion overpressure can be significantly decreased from about 552.5 kPa to 35.0 kPa in the ignited chamber after the new explosion suppression balls are introduced into the tube. The superior explosion suppression effect of the explosion suppression balls can be due to the hollow porous structures. The porous structures not only can significantly increase the specific surface area and heat loss, but also can effectively segment and weaken the reaction surface.
- diesel,
- ventilation tube,
- deflagration,
- explosion suppression ball

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References(12)

References

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