Explosion Hazard of Floating Dust from Fermented Waste Mash in Low Concentration Alcoholic Atmosphere

doi:10.12068/j.issn.1005-3026.2023.07.015

Abstract

Abstract: The floating dust at different heights in the warehouse where the fermented waste mash is stacked is selected， and the three kinds of dust in the upper， middle， and lower layers are named floating dust U(Upper)， floating dust M(Middle) and floating dust L(Lower) respectively. The physical characteristics of three kinds of floating dust were studied to analyze the change in dust explosion characteristics. It was found that the maximum explosion pressure P_max increased with the increase of volatile content and the decrease of ash content. In addition， the change rules of explosion overpressure， minimum ignition energy， lower explosion limit， and flame propagation velocity of floating dust M in 1%， 2%， and 3% alcoholic atmosphere were investigated. It was found that alcohol acted as a volatile component in this mixed explosion system， which not only enhanced the explosion intensity but also enhanced the explosion sensitivity. Finally， with the change of explosion constant， it is pointed out that the dust explosion hazard level changes from St1 to St2 due to the presence of the alcoholic atmosphere.

Key words: fermented waste mash; dust explosion; explosion intensity; explosion sensitivity；alcohol vapor

CLC Number:

X932

RUAN Meng， XU Kai-li， LU Bai-cheng， LIU Bo. Explosion Hazard of Floating Dust from Fermented Waste Mash in Low Concentration Alcoholic Atmosphere[J]. Journal of Northeastern University(Natural Science), 2023, 44(7): 1026-1033.

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