7FA临界灭火浓度的测定及7FA/BTP协同灭火作用研究  

On the determination of critical fire-stamping concentration of 7FA and the synergetic effect between 7FA and BTP in fire-suppression

作　　者：卢大勇[1] 陈涛[2] 周晓猛[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]公安部天津消防研究所,天津300381

出　　处：《安全与环境学报》2015年第4期117-121,共5页Journal of Safety and Environment

基　　金：国家自然科学基金项目(51176078)

摘　　要：作为氢氯氟烃、氢氟烃和全氟烃的理想替代物,七氟环戊烷(7FA)因其具有环境友好性和环状结构而极具发展潜力。首先构建了临界灭火体积分数测定平台,采用杯式燃烧器法测得7FA熄灭乙醇火焰的临界灭火体积分数为8.4%。其次,为了规避其灭火体积分数稍高的缺点,将7FA和一溴三氟丙烯(BTP)按照一定的物质的量比进行了混合,结果表明,在7FA中加入少量的BTP可以显著提高其灭火能力并将其临界灭火体积分数降低到6%以下。最后,在此试验基础上对构建的理论预测模型的可靠性进行了验证,得出7FA与BTP之间存在协同灭火作用。The present paper is aimed to introduce our exploration of how to determine the critical fire-stamping concentration of 7FA and the synergetic effect between 7FA and BTP in the actual fire-suppression. It is for this purpose that we have chosen the cup burner method in hoping to assess properly its ability to suppress the disastrous fire by doing the fire extinguishing experiments with firstly in Tianjin Fire-prevention and Fighting Research Institute under the Ministry of Public Security of the People＇s Republic of China. From the experiment,we have gained 8. 4%（ by volume） as the critical extinguishing concentration of 7FA to ethanol fire. As a kind of idealistic substitution of HCFC,HFC,PFC,we have found that 7FA,the abbreviated form of 1,1,2,2,3,3,4-Heptafluorocyclopentane,has an enormous potential to be used as a new generation of Halon replacement due to its fine environmental features and the cyclic structure. What is more,we have further made a discussion of the fire-extinguishing time,the changes of the flaming shape and the temperature of the flame extension in the process of the fire suppression and extinction. The results of our experimental research showthat the fire-extinguishing time is as short as 10 s and the temperature of extension of the flame can roughly be divided into four stages.And,next,we have made a decision that the application of 7FA should be limited to some extents due to its slightly higher critical extinguishing concentration,particularly when 7FA and 1-bromo-3,3,3-trifluoropropene（ BTP） are used in a mixed way according to a certain mole ratio. It is just starting from this particular situation that we have investigated and discussed the fire extinguishing ability and the temperature of extension of the flame in the process of fire extinguishing of the binary fire extinguishing agents. The experimental results of ours indicate that a small amount of BTP added to 7FA can greatly increase the fire-suppression ability of 7FA and make its critical extinguishing concentratio

关 键 词：安全工程 七氟环戊烷 临界灭火体积分数 杯式燃烧器 协同作用 

分 类 号：X932[环境科学与工程—安全科学]