Minimum ignition energy of LDPE dust/ethylene hybrid mixture. (September 2021)

• Record Type: Journal Article
• Authors: Pang, Lei; Cao, Jiaojiao; Zhao, Yu; Yuan, Chunmiao; Yang, Kai; Zhang, Zhiwen
• Is Part Of: Journal of loss prevention in the process industries. Volume 72(2021)
• Publication Date: 2021-09
• Subjects: Industrial explosion -- Hybrid mixture -- Low density polyethylene -- Ethylene -- Minimum ignition energy; Chemical industries -- Safety measures -- Periodicals; 660.2804
• DOI: 10.1016/j.jlp.2021.104546
• Languages: English
• ISSNs: 0950-4230

Abstract

Abstract: An experimental device for evaluating the minimum ignition energy (MIE) of LDPE dust/ethylene hybrid mixture was built with the innovative mixing mode. The MIE of the hybrid mixture that contained ethylene below its lower explosive limit (LEL) was studied. The result indicated that adding a small amount of ethylene significantly reduced the MIE of the original dust cloud. All the MIEs with five different particle sizes were found to show similar trends of exponential attenuation with the increase of ethylene concentration; such attenuating effect grew as the dust particle size rose. When ethylene concentration increased and approached to its LEL, the reaction mechanism dominated by combustible dust turned into one dominated by combustible gas. The MIE decreased first and then increased with the dust mass and increased with the dust particle size. A multifactor mathematical correlation model of the MIE with the dust particle size and ethylene concentration was developed. Graphical abstract: Image 1 Highlights: Basic data on the MIE of dust/gas hybrid mixture in LDPE production is provided. MIE of LDPE/ethylene hybrid mixture attenuates exponentially with the gas increase. Multifactor mathematical correlation model of MIE of the hybrid mixture is given. Designed a hybrid mixture MIE test system of uniform mixing of dust, gas and air.