抑爆柴油池火燃烧特性试验研究

Experimental study on pool fire combustion characteristics of explosion suppression diesel fuel

为研究抑爆柴油中高分子聚合物防雾剂对池火燃烧特性的影响,开展-10号柴油、防火柴油和抑爆柴油的池火试验。首先将油盆放置在电子秤上,以确定样品燃烧质量失重情况;其次将4支热电偶沿油盆中心线自下而上分别距油盆底面15、30、45和60 cm处布置,以测试火焰温度;然后将烟气分析仪布置在油盆底面中心正上方80 cm处,将辐射热流密度计固定在距离油盆中心40 cm处,分别测试3类柴油燃烧的烟气CO、CO2体积分数和辐射热流密度。结果表明:抑爆柴油中防雾剂参与和促进燃烧主要发生在初始燃烧阶段以及稳定燃烧阶段的前期,而且防雾剂参与燃烧将挥发产生大量可燃蒸气,需要较大的火焰高度和面积来增加接触反应面。抑爆柴油中防雾剂含量小于0.2%时,其池火燃烧特性与防火柴油相差不大,而当含量大于0.4%时,防雾剂将强化池火燃烧,不利于池火自熄灭。

In order to study the influence of polymer anti-fogging agent of explosion suppression diesel fuel on the characteristics of pool fire combustion,pool fire experiments of No.-10 diesel fuel,fire resistant diesel fuel and explosion suppression diesel fuel were conducted.Firstly,the oil basin was placed on the electronic scale to determine the weight loss of the sample caused by combustion.Secondly,four thermocouples were arranged from bottom to top along the central line of the oil basin,respectively,15,30,45 and 60 cm from the bottom of the oil basin to test the flame temperature.Then the flue gas analyzer was arranged at 80 cm above the bottom center of the oil basin,and the radiant heat flux meter was fixed40 cm away from the center of the oil basin.Lastly,the volume fraction of CO and CO2 in flue gas and radiant heat flux of three types of diesel fuels were measured.The results show that the effects of anti-fogging agent of explosion suppression diesel fuel on promoting combustion mainly occur in the initial combustion stage and the early stage of stable combustion,which will volatilize and produce a large amount of combustible vapor that requires a larger flame height and area to increase the contact reaction surface,that when the content of anti-fogging agent is less than 0.2%,the pool fire combustion characteristics of explosion suppression diesel fuel are similar to that of fire resistant diesel fuel,and that while the content of anti-fogging agent is more than 0.4%,its pool fire combustion will be intensified significantly,which is not conducive to its self-extinguishing.