金属热颗粒引燃可燃堆积材料的实验研究

发布时间：2018-07-03 02:53

  本文选题：引燃 + 热颗粒　； 参考：《火灾科学》2017年03期

【摘要】：电焊操作、烟花燃放、工业磨削和高压电线碰撞等过程容易产生高温热颗粒。这些热颗粒一旦接触可燃材料就有可能引燃材料,导致火灾。该文对热颗粒引燃可燃堆积材料的行为进行实验研究,从而为工业堆积材料的火灾防控方法提供参考。实验加热一系列不同直径(6mm,8mm,10mm,12mm,15mm,20mm)的黄铜金属颗粒作为热源,并采用三种常见的工业堆积材料(木粉,炭粉,羟丙基甲基纤维素HPMC)作为可燃材料的代表物,研究不同功率金属热颗粒对材料的引燃行为,分析金属热颗粒引燃材料的临界功率。结果表明,材料本身的性质会影响热颗粒的引燃行为,HPMC的引燃时间最长,木粉的引燃时间最短。随着热颗粒直径的增加,热颗粒引燃三种材料所需的功率值整体呈增大的趋势。由于燃烧空腔的形成,HPMC的引燃临界功率相对较高。
[Abstract]:Welding operation, fireworks discharge, industrial grinding and high-voltage wire collision are easy to produce high-temperature thermal particles. Once in contact with combustible material, these thermal particles may ignite the material and cause fire. In this paper, the behavior of ignition of combustible stacking materials by thermal particles is studied experimentally, which provides a reference for fire prevention and control of industrial piling materials. A series of brass metal particles with different diameters (6mm / 8mm / 10mm / 12mm / 15mm / 20mm) were heated and three common industrial stacking materials (wood powder, carbon powder, hydroxypropyl methyl cellulose HPMC) were used as the representative of combustible materials. The ignition behavior of metallic thermal particles with different power was studied, and the critical power of metal thermal particles was analyzed. The results show that the properties of the material can affect the ignition behavior of thermal particles and the ignition time of HPMC is the longest and the ignition time of wood powder is the shortest. With the increase of the diameter of thermal particles, the power value required for the ignition of the three kinds of materials shows a trend of increasing as a whole. The ignition critical power of HPMC is relatively high because of the formation of combustion cavity.
【作者单位】： 中国科学技术大学火灾科学国家重点实验室;
【基金】：国家重点研发计划项目(2016YFC0800104) 国家自然科学基金(51576184)
【分类号】：X932
，

本文编号：2092069