不同类型灭火剂的复合射流灭火实验研究

复合射流灭火技术是一种集多类灭火剂优势于一体的新型灭火技术。选取圆形钢质油盘模拟油罐灭火实验,分别利用单类灭火剂和不同组合的复合灭火剂灭火,记录温度变化。结果表明,灭火剂复合射流充分发挥了多类灭火剂的灭火优势,有力提高了综合灭火效能。

复合超细干粉灭火剂灭火性能研究

为进一步提升现有干粉灭火剂灭火效能,首先以化学纯氢氧化镁为添加剂,制备复合型超细干粉灭火剂;然后分别用热重分析仪（TGA）和差示扫描量热仪（DSC）等仪器开展热分解试验;最后通过小尺寸灭火试验,对比分析各类灭火剂的灭火效能和抑制有毒有害气体的能力。结果表明：用氢氧化镁能提高复合超细干粉灭火剂在热分解过程中的分解速率峰值,降低各分解阶段的特征温度,减小灭火剂用量、缩短灭火时间、降低最小灭火浓度（MEC）,有效抑制有毒有害气体的产生。

含添加剂细水雾灭火技术探讨

细水雾灭火系统的添加剂仅限于水溶性的物质,而不能使用非水溶性的液态添加剂,使灭火添加剂的选择有一定局限性,迫切需要研制新型的含添加剂细水雾灭火系统,从真正意义上实现固、气、液三态的物理化学灭火方法的综合应用。从含添加剂细水雾灭火技术原理、灭火系统构成,以及添加剂添加方式出发,探讨了新型细水雾灭火系统以非水溶性液态物质作为添加剂,实现复合灭火的可能性及应用前景。

化学灭火添加剂的灭火有效性实验研究

通过大量的实验及查阅相关的国外文献资料,对化学添加剂的灭火机理及其灭火性能进行了研究,研究的对象分为两类:一类是易溶于水的碱金属盐,主要是研究其作为化学添加剂添加在细水雾中的灭火效果;另一类是含铁、锌、锰等元素的高效化学灭火物质,研究其作为化学添加剂添加到其它气态灭火介质如二氧化碳、氮气中的灭火效果.同时作者通过实验重点论证了灭火添加剂的优化配比、极限性和提高其灭火效能的途径等问题,也讨论了灭火添加剂与其它灭火介质之间的相互作用关系,为研制新型清洁、经济、高效的灭火剂奠定了基础.

典型超细干粉与惰性气体的协同灭火效果研究

粉体灭火技术中惰性气体常常作为驱动气体,为改进粉体灭火技术,探究惰性气体与粉体之间的协同灭火作用,应用改进的杯式燃烧器,测试超细KHCO_(3)、超细KH_(2)PO_(4)、超细磷酸铵盐ABC等典型干粉熄灭甲烷火的灭火能力;选用超细KHCO_(3)干粉和超细磷酸铵盐ABC干粉作为研究对象,并选择CO_(2)、N_(2)、He、Ar惰性气体灭火剂,分析气固协同灭火效果。结果表明:灭火能力顺序为超细KHCO_(3)>超细磷酸铵盐ABC干粉>超细KH_(2)PO_(4);超细ABC干粉与4种惰性气体之间具有较好的气固协同灭火效果,协同因子峰值分别为0.47、0.53、0.54和0.51,对应的气体体积分数约为5.5%、5.9%、8.7%和14.4%;而KHCO_(3)干粉与4种惰性气体的协同灭火效果不明显。

Fire Extinct Experiments with Water Mist by Adding Additives

The effects of fire extinguishment with water mist by adding different additives were studied.Tens of chemical substances (including alkali metal salt,dilution agent and surface active agent) were selected as additives due to their different extinct mechanisms.At first the performance of fire extinguishment with single additive was studied,then the effects of the same kinds of chemical substances under the same mass fraction were compared to study their influences on the fire extinguishment factors,including extinct time,fire temperature and oxygen concentration from which the fire extinct mechanism with additives could be concluded.Based on this the experiments were conducted to study the cooperate effect of the complexity of different additives.It indicated the relations between different firefighting mechanisms and different additives were competitive.From a large number of experiments the extinct mechanism with water mist by adding additives was concluded and an optimal compounding additive was selected.