新型茧覆惰化材料对不同体积分数甲烷的吸收性能分析

针对研制出的新型茧覆惰化材料,选择在甲烷爆炸下限以下2%、3%和4%三个体积分数梯度,使用纯水、多体积分数水平的新型复配试剂和参比试剂(国际先进水基灭火溶液F-500)对含有不同体积分数甲烷的混合气体进行喷洒,对比研究新型试剂在不同体积分数甲烷泄漏环境中的吸收性能。结果表明,不同甲烷体积分数环境下,两试剂均表现出良好的吸收包覆甲烷的能力,配方试剂对应曲线较参比试剂的波动小,甲烷体积分数下降速度更快,茧覆吸收效果突出、稳定;随添加量增加,两试剂受到分布不均及包覆饱和的影响,作用后期出现小范围反吸收效应,但不影响甲烷体积分数的整体下降趋势。配方试剂吸收包覆可燃烷烃的能力随试剂添加量及作用时间增长而增强,当添加量超过3%时,作用效果明显,试验初期甲烷体积分数下降迅速,后期逐步趋于稳定。总体而言,新型茧覆惰化材料具有良好的吸收包覆甲烷气体的能力。

Analysis of the absorption efficiency of a new cocoon-covered inert agent in methane at variable concentrations

This paper intends to make an exploration of the effectiveness of our new cocoon-covered inert agent in absorbing the methane in variable concentrations.For the said purpose,we have chosen pure water as the new agent along with another kind of an agent as a contrast one (international advanced water-based fire extinguishing agent F-500) to spray the methane of variable volume fractions (2％-4％,below its lower explosive limit).As a result,the two agents can both indicate their advantages in absorbing methane at various concentrations.However,as compared with F-500,the corresponding curve of the new agent may turn to be somewhat fluctuated and likely to decrease its concentrations quickly.Thus,the absorption property of the new agent tends to be more prominent and stable.Nevertheless,it can't be ignored that with the increase of the agent,a minor range of antiabsorption may come out at the later stages due to the effect of its uneven distribution and saturation,though it may not affect the overall downward-dropping trend in the concentration of methane.In so doing,the absorption property of the new agent tends to be improved with the increase of its concentration and intereaction time.Thus,when the concentration of the agent tends to get from 1％ to 3％,it would be attributed less to the absorptive property of methane.Furthermore,when its concentration is getting over 3％,it would show a noticeable increasing trend of methane absorption.Thus,it can be seen that during the entire process of the experiment,the concentration of methane tends to drop or fall all the time,but it may reveal different changing rates during the different periods.Therefore,it can be concluded that the new agent may tend to absorb methane more quickly at the beginning and then the concentration of methane would probably be plunged for a short period of time.Besides,the absorption rate may also reveal a slow-down trend in the medium term with its concentration getting to be stabilized in the end.In spite of this,on the whole,the new cocoon-covered inert agent can be expected to enjoy a nice ability of absorbing methane by coating them to result in an inert ‘ chemical cocoon'.