惰性气体对异丙醇爆炸抑制作用的试验研究

基于FRT 的爆炸极限测试装置，在50 ℃、0.1 MPa条件下测试了异丙醇蒸气在空气中的爆炸极限。加入二氧化碳或氮气，改变异丙醇蒸气与二氧化碳或氮气的体积分数进行试验，研究惰性气体对异丙醇蒸气的抑爆效果。结果表明：在异丙醇爆炸极限范围内，随着异丙醇蒸气浓度升高，二氧化碳或氮气的抑爆体积分数降低，且二氧化碳抑爆效果优于氮气；在惰性气体抑爆作用下，氧气与蒸气体积分数比值小于2.10 时，混合气体不发生爆燃。绘制了抑爆三角区，描述惰性气体对异丙醇爆炸特性的影响，并从活化能理论、链式反应理论等方面分析不同惰性气体的抑爆作用差异。

Experimental study on the explosion suppression effect of inert gas on isopropanol

Based on the FRT explosion limit test instrument,the explosion limit of isopropanol vapor in air was tested under the initial conditions of 50℃,0.1 MPa.Experiments on explosion suppression effect of carbon dioxide or nitrogen on for isopropanol vapor were done by changing the proportions of isopropanol vapor and carbon dioxide as well as isopropanol vapor and nitrogen.The results showed that the explosion suppression volume fraction of inert gas decreases with the increase of isopropanol vapor concentration,and the carbon dioxide suppression effect is better than that of nitrogen.Under the suppression action of inert gas,when the volume fraction ratio of oxygen to vapor is less than 2.10,the mixed gas does not deflagrate.The explosion suppression triangle was drawn to describe the influence of inert gas on the explosion characteristics of isopropanol,and the difference of explosion suppression effect of different inert gases was analyzed from the aspects of activation energy theory and chain reaction theory.