Flame propagation and explosion characteristics of food‐based dust as a function of dust concentration

A comprehensive grasp of the mechanisms and characteristics of dust explosions holds significant importance in guiding safe operations and risk mitigation measures. This research examined the impact of dust concentration on the flame propagation and explosion characteristics of rice flour and tea du...

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Bibliographic Details
Published in:Process safety progress 2024-09, Vol.43 (3), p.579-586
Main Authors: Sulaiman, Siti Zubaidah, Mohd Mokhtar, Khairiah, Wan Sulaiman, Wan Zaiton, Semawi, Nur Hikmah
Format: Article
Language:English
Subjects:
Dust
dust concentration
explosion characteristics
Explosions
Flame propagation
flame temperature
flame velocity
Flour
food‐based dust
Heat transfer
Heating
Moisture content
Propagation velocity
Pyrolysis
Rice
Risk reduction
Thermal radiation
Turbulent flames
Water content
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Summary:A comprehensive grasp of the mechanisms and characteristics of dust explosions holds significant importance in guiding safe operations and risk mitigation measures. This research examined the impact of dust concentration on the flame propagation and explosion characteristics of rice flour and tea dust. The explosion test was carried out in a 20‐L spherical chamber and demonstrated that elevating the dust concentration led to increased explosion pressure and flame velocity. Simultaneously, it decreased both the rise initiation time and the peak time. This observation can be attributed to more particles ignited by heat radiation per unit volume and a greater frequency of effective collisions between reactant molecules. These factors enhance mass and heat transfer in preheating and reaction zones, producing more violent pyrolysis. However, tea dust exhibited a slower flame propagation with weaker turbulent flame intensity due to its higher moisture content and larger particle size than rice flour.
ISSN:1066-8527
1547-5913
DOI:10.1002/prs.12591