Effect of flame propagation regime on pressure evolution of nano and micron PMMA dust explosions

Zhang, Xinyan; Gao, Wei; Yu, Jianliang; Zhang, Yansong; Zhang, Jie; Huang, Xingwang; Chen, Jinshe

doi:10.1016/j.jlp.2019.104037

Cited by 15 publications

(2 citation statements)

References 21 publications

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“…Under the high-temperature effect of the explosion flame, powder coatings undergo cross-linking and solidification between particles, forming a dense and stable coating layer and experiencing varying degrees of agglomeration and solidification phenomena. Based on the results of scanning electron microscopy and previous research on the explosion mechanism of organic dust, − a clear understanding of the explosion mechanism of electrostatic spraying powder can be obtained. As shown in Figure , the explosive development process of powder coating particles is concentrated in a three-phase system, where solid particles, molten particles, and combustible gases coexist.…”

Section: Results and Discussionmentioning

confidence: 99%

Study on Explosion Characteristics and Mechanism of Electrostatic Spray Powder

Qin,

Zhang,

Shi

et al. 2024

ACS Omega

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In order to fully understand the explosion risk of electrostatic spraying powder, corresponding preventive measures are put forward. The explosion characteristics, ignition sensitivity, and flame propagation of three typical electrostatic spraying powders were tested using a 20 L spherical explosion test device, a G–G furnace test device, and a Hartmann tube test device, and the explosion process and mechanism of electrostatic spraying powders were discussed. The results show that the maximum explosion pressure and the maximum explosion pressure rise rate increase first and then decrease with the increase in mass concentration. The maximum explosion pressure and the maximum explosion pressure rise rate of acrylic powder coating are the largest, which are 0.75 and 85.4 MPa/s, respectively. The shortest burning time is 97.5 ms, and the highest explosion danger level is 23.46 MPa·m/s. The flame propagation of electrostatic spraying powder develops slowly; the flame front spreads linearly and the average flame velocity increases first and then decreases. The explosive development process of powder coating particles is concentrated in the three-phase system of solid particles, molten particles, and pyrolytic gasification combustible gas, which goes through the kinetic process of particle heating melting, cross-linking curing, pyrolytic gasification, combustion, and extinction.

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Section: Results and Discussionmentioning

confidence: 99%

Study on Explosion Characteristics and Mechanism of Electrostatic Spray Powder

Qin,

Zhang,

Shi

et al. 2024

ACS Omega

Self Cite

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“…Particle size is one of the factors affecting dust explosions. Zhang et al [13] studied five coal samples with the same particle size span (PSS) and different PSD. The results showed that the explosion rate is greatly influenced by PSD.…”

Section: Introductionmentioning

confidence: 99%

Explosion Severity of Rice Dust in a Spherical System

et al. 2023

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Rice is relatively rich in minerals, including iron, magnesium, and selenium. In the presence of a spark, rice dust suspended in air in a range of concentrations can ignite and explode. The explosion characteristics of brown, black, white, glutinous, and Bario rice were studied in a 20‐L spherical vessel. Brown rice recorded the highest explosion pressure and rate of pressure rise in both dried and undried forms, while Bario rice recorded the lowest. Brown rice was more combustible and tended to develop a fast flame mechanism once ignited owing to its low moisture content and high volatility, which made its explosion more severe compared to that of black, white, glutinous, and Bario rice.

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Suppression mechanism of micron/nano PMMA dust flame based on thermal analysis

Guo

Zhang

et al. 2022

Advanced Powder Technology

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Effect of flame propagation regime on pressure evolution of nano and micron PMMA dust explosions

Cited by 15 publications

References 21 publications

Study on Explosion Characteristics and Mechanism of Electrostatic Spray Powder

Study on Explosion Characteristics and Mechanism of Electrostatic Spray Powder

Explosion Severity of Rice Dust in a Spherical System

Suppression mechanism of micron/nano PMMA dust flame based on thermal analysis

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