摘要
以Siwek 20L爆炸球中所测实验数据为基础,对3种可燃粉尘-碳酸钙混合体系的爆炸行为进行了比较分析。结果表明:烟煤粉爆炸机理为"气相燃烧",而无烟煤、镁粉的燃烧爆炸属"表面非均相氧化"机理,碳酸钙对前一机理控制的粉尘爆炸的抑制效力优于后者,碳酸钙的抑爆效力与可燃粉尘的热值无直接关联,但随着碳酸钙粒径的减小而增强。
Based on the experimental data of dust explosion obtained from a Siwek 20 L vessel,explosion behaviors of dustCaCO3 mixtures were comparatively analyzed.Results showed that：the explosion mechanism of bituminous coal dust corresponds to the homogeneous deflagration,while the explosion mechanism of anthracite and magnesium dusts is mainly the heterogeneous deflagration.It is indicated that the inhibition effectiveness of CaCO3 on homogeneous-deflagration-dust is better than the other one.The inhibition effectiveness is hardly related to the calorific value of dusts,but affected by particle size of CaCO3 significantly.Finer CaCO3 shows better inhibition effectiveness than the coarser.
出处
《消防科学与技术》
CAS
北大核心
2014年第2期128-131,共4页
Fire Science and Technology
关键词
粉尘爆炸
碳酸钙
爆炸机理
抑爆效力
dust explosion
calcium carbonate
explosion mechanism
inhibition effectiveness
