中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (5): 86-91.doi: 10.16265/j.cnki.issn1003-3033.2018.05.015

• 安全工程技术科学 • 上一篇    下一篇

干水材料对小麦淀粉火焰抑制的研究

廖若愚, 陈先锋** 教授, 袁必和, 何松, 代华明, 李欣   

  1. 武汉理工大学 资源与环境工程学院,湖北 武汉 430070
  • 收稿日期:2018-02-08 修回日期:2018-04-01 出版日期:2018-05-28 发布日期:2020-11-25
  • 通讯作者: **陈先锋(1975—),男,湖北应城人,博士,教授,主要从事安全工程专业方面的教学与科研工作。E-mail:cxf618@whut.edu.cn。
  • 作者简介:廖若愚(1993—),男,湖北安陆人,硕士研究生,主要研究方向为工业防火防爆技术。E-mail:wtyxleo@163.com。
  • 基金资助:
    国家重点研发计划项目(2017YFC0804705);国家自然科学基金资助(51774221,51374164)。

Study on suppression of wheat starch flame by dry water material

LIAO Ruoyu, CHEN Xianfeng, YUAN Bihe, HE Song, DAI Huaming, LI Xin   

  1. School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan Hubei 430070,China
  • Received:2018-02-08 Revised:2018-04-01 Online:2018-05-28 Published:2020-11-25

摘要: 为探究干水材料对淀粉云燃烧的抑制性能,采用小尺寸竖直管道燃烧系统和高速摄影仪系统进行试验。通过分析小麦淀粉云火焰形态、火焰温度及火焰传播速度的变化,研究干水材料对不同质量浓度的小麦淀粉云燃烧的抑制机制及抑制效果。研究表明:干水材料的惰化抑制主要表现为干水材料中水的汽化吸热作用和疏水性气相纳米二氧化硅的隔热作用;干水材料能减弱小麦淀粉云火焰的传播速度,降低火焰的最高温度;干水材料的抑制效果随粉尘云质量浓度的增高先提升后降低,当粉尘云质量浓度为400 g/m3时,抑制效果最好。

关键词: 干水材料, 粉尘燃烧, 小麦淀粉, 粉尘云浓度, 抑制

Abstract: To explore the starch cloud combustion inhibition effects and inhibition mechanism of dry water materials a kind of dry water material was prepared from white carbon,and experiments were carried out by using a small-scale vertical pipe experiment system and a data acquisition system.Effects of the dry water material were studied on flame morphology,flame temperature,and flame propagation speed of wheat starch cloud.The experimental results show that the dry water material can reduce both the maximum flame temperature and the maximum propagation speed of wheat starch flame,that the mainly physical inhibition by the dry water material is the vaporization of the water from the dry water material and the heat insulation of hydrophobic silica particles with nanometer dimensions,that the inhibition effect of dry water material increases firstly and then decreases slightly with the increasing of wheat starch dust concentration,and that the optimal effect is obtained when the mass concentration of starch is 400 g/m3.

Key words: dry water, dust burning, wheat starch, dust cloud concentration, inhibition

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