不同释放方式对全氟己酮抑制B类火焰的影响研究  

Study on the effect of different release methods on the inhibition of Class B flames by perfluorohexane

作　　者：韩志跃[1] 任彦博 张信睿 和张航 Han Zhiyue;Ren Yanbo;Zhang Xinrui;He Zhanghang(Key Laboratory of Explosion Science and Safety Protec-tion,Beijing Institute of Technology,Beijing 100081,China;Zaozhuang Fire and Rescue Division,Shandong Zaozhuang 277100,China)

机构地区：[1]北京理工大学爆炸科学与安全防护全国重点实验室,北京100081 [2]枣庄市消防救援支队,山东枣庄277100

出　　处：《消防科学与技术》2024年第10期1413-1418,共6页Fire Science and Technology

基　　金：国家自然科学基金面上项目(22178026)。

摘　　要：全氟己酮作为一种高效环保的灭火剂,需要依托良好的释放方式才能有效发挥其灭火性能。为了检验不同释放方式下全氟己酮的灭火效能,使用20 mL正庚烷油盘火作为火焰模型,分别利用1.2 MPa的氮气和2 g富氮产气物质来推动全氟己酮释放。讨论和比较了全氟己酮在两种释放方式下,对B类火焰的灭火效果、降温能力和作用机理。研究结果表明:施放的压力对全氟己酮灭火效果影响显著。相比于充装氮气的驱动方式,全氟己酮在富氮产气物质产生的高压气流作用下,能充分释放并及时扑灭火灾,在灭火时间、降温效果、火焰抑制上均有优异的表现。机理分析表明,在1.2 MPa的氮气充装驱动下,大部分的全氟己酮在释放过程中尚未与火焰接触便发生了挥发。而全氟己酮在仅2 g富氮产气物质产生的高压气流作用下,能够与火焰燃烧面充分接触,吸热分解并发挥化学抑制作用,快速阻断燃烧反应。FK-5-1-12,known for its efficiency and cleanliness as a fire extinguishing agent,requires an effective release mode to fully utilize its capabilities.In order to assess the impact of differ-ent release modes on the performance of FK-5-1-12,a 20 mL nheptane oil pan fire was used as a model for class B flames.The research utilized 1.2 MPa N2 filling and 2 g of nitrogen-rich gasproducing substances(NGS)to facilitate the release of FK-5-1-12.The research focused on comparing and analyzing the fire ex-tinguishing effectiveness,cooling capacity,and mechanisms of FK-5-1-12 on class B flames under these two release modes.The research revealed that application pressure had a significant impact on the fire extinguishing effectiveness of FK-5-1-12.When released through the high-pressure gas flow generated by NGS,FK-5-1-12 showed better performance in extinguishing time,cooling effect,and flame suppression compared to the N2 drive release mode.Mechanistic analysis indicated that a sub-stantial amount of FK-5-1-12 in the 1.2 MPa N2 drive did not reach the flame surface due to volatilization during release.In con-trast,FK-5-1-12 effectively reached the burning surface of the flame with the influence of the high-pressure gas flow produced by only 2 g of NGS.Upon reaching the flame,FK-5-1-12 de-composed by absorbing heat,exerted a chemical inhibition effect,and rapidly halted the combustion reaction.

关 键 词：全氟己酮 释放方式 B类火焰 灭火性能 

分 类 号：X913.4[环境科学与工程—安全科学] TQ569[化学工程—炸药化工]