主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2023, Vol. 42 ›› Issue (4): 443-447.

• • 上一篇    下一篇

不同复配比SiO2/七氟丙烷抑爆剂对甲烷/空气爆炸特性的影响

杨 克，王跃胜，邢志祥，吴 洁   

  1. （常州大学 安全科学与工程学院，江苏 常州 213164）
  • 出版日期:2023-04-15 发布日期:2023-04-15
  • 作者简介:杨 克（1982- ），男，山西陵川人，常州大学安全科学与工程学院副院长，副教授，博士，主要从事工业过程安全、消防安全、油气储运安全研究，江苏省常州市武进区滆湖中路1号常州大学武进校区，213164。
  • 基金资助:
    国家自然科学基金(51704041)；江苏省自然科学基金(BK20140264)

Influence of SiO2/HFC-227ea explosion suppressor with different complex ratio on methane/air explosion characteristic

Yang Ke, Wang Yuesheng, Xing Zhixiang, Wu Jie   

  1. (School of Safety Science and Engineering, Changzhou University, Jiangsu Changzhou 213164, China)
  • Online:2023-04-15 Published:2023-04-15

摘要： 为提高单一类型抑爆剂对甲烷的抑爆效果，在自行搭建试验平台的基础上，研究了二氧化硅粉体和七氟丙烷气体协同抑制9.5%甲烷/空气爆炸效果。通过改变二氧化硅粉体质量浓度与七氟丙烷气体体积分数，研究了二者单独作用和协同作用对甲烷/空气爆炸特性参数的影响。结果表明，在七氟丙烷气体与纳米二氧化硅粉体的共同作用下，气固两相抑爆剂对9.5%甲烷/空气预混气体爆炸超压、火焰传播速度和火焰传播特性的抑制均表现出协同抑制作用。当纳米二氧化硅粉体质量浓度达到0.10 g/L，加入不同体积分数的七氟丙烷气体，均能对9.5%甲烷/空气预混气体爆炸产生良好的抑制效果，其中添加4%七氟丙烷，相比于无二氧化硅无七氟丙烷条件下，火焰最大速度下降78.5%，火焰最大爆炸超压下降79.7%，抑制效果最好。控制参数继续增加，抑制效果降低。研究气固混合物协同抑爆机理，为两相抑爆技术的应用提供技术指导。

关键词: 甲烷爆炸, 二氧化硅, 七氟丙烷, 火焰速度, 爆炸超压

Abstract: In order to improve the explosion suppression effect of a single type of detonation inhibitor on methane, the synergistic inhibition effect of silica powder and heptafluoropropane gas on 9.5% methane/air explosion was studied based on the self-built experimental platform. By changing the mass concentration of silica powder and the gas volume fraction of heptafluoropropane, the effects of the two independent and synergistic effects on the methane/air explosion characteristic parameters were studied. The results showed that under the combined action of heptafluoropropane gas and nano-silica powder, the gas-solid two-phase detonation suppressor exhibits synergistic inhibition on the explosion pressure, flame propagation velocity and flame propagation characteristics of 9.5% methane/air premixed gas inhibition. When the concentration of nano-silica powder reaches 0.10 g/L, adding heptafluoropropane gas with different volume fractions can have a good inhibitory effect on the explosion of 9.5% methane/air premixed gas. Under the condition of silica without heptafluoropropane, the maximum flame velocity decreased by 78.5%, and the maximum explosion pressure of the flame decreased by 79.7%, and the inhibition effect was the best. As the control parameters continue to increase, the suppression effect decreases. The mechanism of synergistic explosion suppression of gas-solid mixture was studied. It provides technical guidance for the application of two-phase explosion suppression technology.

Key words: methane explosion, silicon dioxide, HFC-227ea, flame velocity, the explosion overpressure