细化粉基介质抑制熄灭油池火的模拟实验研究.pdfVIP

第1 7卷第 1 1期 中 国 安 全 科 学 学 报 ． 2 0 0 7年 1 1月 China Safety Science Journal V01．17No．11 Nov．2 0 0 7 细化粉基介质抑制熄灭油池火的模拟实验研究 杨冬雷 况凯骞 郑莹辉 倪小敏 廖光煊 教授 (中国科学技术大学火灾科学国家重点实验室，合肥230027) 学科分类与代码：620．2030 中图分类号：X928．7；TQ569 文献标识码：A 基金项目：中国博士后科学基金资助(20070410216)。 【摘 要】 利用行星式球磨机细化加工普通Bc干粉灭火材料，并通过扫描电子显微镜对细化前后 粉体颗粒的粒径分布和表面形态进行了比较分析；随后在小型粉体灭火装置内，比较了普通BC干 粉和细化后粉体的灭火效率。实验发现：细化粉体的灭火效果好于同等实验条件下的普通BC干 粉，侧面施加粉体的灭火方式好于底部施加；粉体熄灭煤油火较熄灭酒精火容易。最后，简要讨论了 粉体的灭火机制以及细化后粉体灭火性能得到提高的原因。 【关键词】 消防工程； 干粉； 细化； 表面特性； 灭火性能 Experimental Study of Suppressing Oil Pool Fire with Thinned Powder YANG Dong-lei KUANG Kai-qian ZHENG Ying-hui NI Xiao-min LIAO Guang-xuan．Prof． (State Key Laboratory of Fire Science，University of ScienceTechnology of China，Hefei 23O027，China) Abstract： The regular BC powder was made into fine particles by use of ball mill，and the particle size distribution and surface feature was carefully studied with the help of electronic microscope scanning de— vice．To study the effectiveness of the thinned powder in fire suppression，a laboratory—scale suppression system was built and a series of tests were conducted in this system．The fire suppression effectiveness be— tween regular BC powder and thinned powder was compared based on the impact of particle size distribu— tion on the overall fire behavior．The experimental result reveals that the fire suppression effectiveness is improved greatly by thinning the regular BC power，the effectiveness of side suppression is higher than that of bottom suppression，and the thinned particles suppress kerosene fire easier than alcohol fire．Finally， the suppression mechanism is discussed SO as to find out the deep re