Effects of particle size on ignition characteristics of corn starch dust cloud

doi:10.16265/j.cnki.issn1003-3033.2018.04.010

Abstract

Abstract: In order to study the ignition mechanism and combustion behavior of corn starch dust, experiments were carried out on corn starch dust by using a synchronous thermal analyzer and a high-speed photography system. The ignition characteristics temperature, ignition characteristic index and ignition delay time of corn starch under different particle size conditions were obtained and the effects of particle size on the ignition characteristics of corn starch dust cloud were analyzed. The results show that with the decrease in the dust particle size, the ignition characteristic temperatures of corn starch decreases, while the ignition index increases, and the corn starch dust cloud in the range of small particle size can ignite easily, that there is a significant quadratic function relationship between the ignition delay time and the particle size, and that the smaller the particle size is, the shorter the ignition time of the corn starch cloud will be.

Key words: dust explosion, ignition characteristic, particle size, ignition delay time, ignition temperature

CLC Number:

X932

XIE Tian, CHEN Xianfeng, ZHANG Hongming, HUANG Chuyuan, TANG Wenwen, ZHOU Hongwen. Effects of particle size on ignition characteristics of corn starch dust cloud[J]. China Safety Science Journal, 2018, 28(4): 53-58.

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