CO_2分析在含化学添加剂的细水雾灭火研究中的应用探讨

通过实验和计算证明CO2浓度分析是评价含添加剂细水雾灭火有效性的简单而有效方法。采用燃烧分析仪测定细水雾灭火实验过程中的CO2浓度,比较含不同添加剂细水雾和纯水细水雾在同一实验控制条件下的CO2浓度变化规律,利用CO2浓度变化规律判断含添加剂细水雾灭火的效率。根据上述规律,可从两方面比较细水雾的灭火效率:一是CO2的最高浓度。CO2达到的最大浓度小,则燃烧过程中的热释速率小或灭火时间短,说明细水雾抑制燃烧的效果较好。二是施加细水雾后CO2浓度变化率。CO2浓度变化率小,燃烧过程中的热释速率就小,说明细水雾抑制燃烧的效果较好。

Application of CO2 Analysis in Fire Extinguishment with Chemical Additive Containing Water Mist

Experiments and calculation prove that the analysis of carbon dioxide concentration is a simple and effective method for evaluating the effectiveness of additive containing water mist in fire extinguishment.The CO_2 concentration in the course of fire extinguishing experiment by water mist is measured by combustion analyzer.Suppose the experiment conditions are kept constant,by comparing the CO_2 concentrations measured in the mist with different additives and without additive it is possible to verify the effectiveness of the additive containing water mist.According to above-mentioned regularity,the fire extinguishment effectiveness of additive containing water mist could be compared from two aspects.When the CO_2 reaches to maximum,the rate of heat release in combustion process is small and the extinguishing time would be short demonstrating that the inhibiting effectiveness in combustion is comparatively good.The other one is the variation of CO_2 concentration after using water mist.If the variation is small,the heat release in combustion process would be small demonstrating the inhibiting effectiveness of the water mist would be good.