原木楞堆燃烧过程及释放气体的试验研究

Experimental research of burning process and gas release of log sutra

通过对原木楞堆进行火灾试验以及对楞堆燃烧温度和对周围辐射温度的记录,分析原木楞堆燃烧过程中各个测点的温度曲线的变化,并采用气相色谱仪对各个阶段燃烧气体成分进行分析。得出以下结论:伴随着楞堆温度的升高,生成气体中的CO2、CO两种气体的含量明显提高;空气中O2、N2两种气体的含量逐渐下降;楞堆燃烧温度和温度场的分布明显受到外界风速的影响;楞堆燃烧可明显分为4个阶段;楞堆由初始阶段到完全燃烧所需要的时间很短。

Based on the full-scale fire test of log sutra and the records of combustion temperature and radiation temperature of the log sutra,the temperature curve change of each measure point in the burning process of log sutra was analyzed.In the meantime,the gas composition of smoldering process was analyzed by gas chromatography.The conclusions are： With the temperature rise of log sutra,content of hydrogen,carbon dioxide and carbon monoxide increased significantly,on the contrary,content of oxygen,methane and nitrogen decreased gradually;Temperature and the temperature field distribution of log sutra combustion were affect by outside wind;Sutra combustion can be divided into four stages;The time is very short for the sutra from start to complete burning.