聚酰胺树脂粉尘/丙烷/空气杂混物爆炸特性  

Explosion characteristics for hybrid of PA dust/propane/air mixtures

作　　者：苏登 杨博[1] 吕岳[1] 王信群[1] 

机构地区：[1]中国计量学院质量与安全工程学院,浙江杭州310018

出　　处：《消防科学与技术》2016年第5期603-606,共4页Fire Science and Technology

基　　金：国家国际科技合作专项项目(2013DFG71760);国家自然科学基金项目(51174182)

摘　　要：选取三种不同粒径的聚酰胺(PA)树脂粉尘,以激光粒度仪测量粒径分布。在20L爆炸试验装置中开展PA粉尘/丙烷/空气组成的杂混物爆炸特性研究,分析丙烷浓度对粉尘爆炸参数的影响规律。结果表明:在三种PA树脂粉尘/空气混合物中施加丙烷气体均导致粉尘爆炸下限呈现降低的趋势。对于粒径较小的PAⅢ树脂粉尘/空气混合物,施加的丙烷体积分数为2.0%时,爆炸下限降至原值的一半。与单纯的可燃粉尘/空气混合物相比,可燃气体与可燃粉尘热解生成的可燃挥发分相叠加,其最大爆炸压力升高。对于大粒径粉尘,该增强作用尤为显著。杂混物的最大压力上升速率也呈现增大的趋势。对于PAⅢ粉尘/空气混合物,施加的丙烷体积分数为2.0%时其最大爆炸压力成倍增长。The particle size of 3 kinds of polyamide resin （PA） dust were tested by laser particle size analyzer. Experiments were carried out in 20 L explosion apparatus to investigate the influence of the propane concentration on the explosion characteristics of PA dust/air mixtures with three different particle sizes. The results showed that the lower explosion limit of the PA dust/air mixtures decreased with addition of propane. For the PA III dust/air mixture with small particle size, the lower explosion limit was down to half of its original value when 2.0% propane was involved. Compared with PA dust/air mixtures,the maximum explosion pressure for the hybrid of PA dust/propane/air mixtures increased because of the superposition of combustible volatiles. The enhancement effect was particularly significant for PA dust/mixtures with large particle size. The maximum rate of pressure rise showed a trend of in crease also. The maximum rate of pressure rise of PAIII dust/ air mixture increased timely when 2.0% propane was involved.

关 键 词：PA树脂粉尘 丙烷 杂混物 爆炸特性 爆炸下限 爆炸压力 

分 类 号：X932[环境科学与工程—安全科学] X928.1