气相二茂铁抑制池火燃烧的有效性分析

Validity analysis on the suppression of pool fire with gas phase ferrocene

以N2作载气,开展了不同工况气相二茂铁作用于受限空间中酒精燃烧的系列实验。实验过程中借助M-9000燃烧分析仪和质量采集系统对其烟气(如O2、CO)体积分数和酒精质量变化进行在线测量,以此为基础数据分析气相二茂铁抑制酒精燃烧的有效性。通过对不同工况下烟气体积分数、热释速率和火焰高度的分析得出:当载气流量为1.00m3/h时,气相二茂铁的抑制效果随其饱和蒸气压的升高而增强。其具体表现为酒精燃烧效率、热释速率和火焰高度随气相二茂铁饱和蒸气压的升高而相应降低;O2剩余量随气相二茂铁饱和蒸气压的升高而相应增大,CO最大生成量随气相二茂铁饱和蒸气压的升高而相应下降。

The aim of this study is to investigate the inhibitory effect of the alcohol-containing pool fire suppressed by different saturated vapor pressures that can be produced by ferrocene in gas state. AS is well known that ferrocene is a good chemical inhibitor of high efficiency, free-from-pollution with less noxious smoke. So, for the study purpose, we have first of all set up an improved evaporation system of ferrocene with a broad range than that of the foreign evaporation systems of the same nature. Then the platform and data collection system was established to analyze the effect of fire-extinguishing. And, finally, a series of experiments on alcohol pool fire have been conducted in a confined compartment suppressed by nitrogen with or without different saturated vapor pressures of ferrocene. The smoke contents were then measured on-line, such as oxygen, carbon monox- ide and the quality change of alcohol by means of an M-9000 combustion analyzer and the mass acquisition system so as to analyze the inhibitory effect of ferrecene. The results of our analysis show that the burning efficiency, the heat release rate as well as the flame height of alcohol pool fire tend to drop when the saturated vapor pressure of ferrocene rises and the volumetric flow rate of nitrogen reaches 1.00 m^3/h. The residual amount of oxygen tend to be higher with the accretion of the saturated vapor pressure of ferrocene. But the max formation amount of carbon monoxide tends to be lower with the auretion of the saturated vapor pressur of ferrecene.