氮气与二氧化碳对甲醇爆炸极限的影响

Influence of Nitrogen and Carbon Dioxide on Methanol Explosion Limit

运用FRTA爆炸极限测试仪,研究在氮气与二氧化碳的作用下,甲醇爆炸极限的变化状况,并分析比较它们对甲醇的抑爆能力.依据测定结果,运用Origin制图软件,拟合出甲醇爆炸极限的变化规律曲线.结果表明:氮气与二氧化碳都能起到缩小爆炸极限范围、抑制爆炸的作用.当氮气与二氧化碳浓度分别为44%、33%的时候,甲醇爆炸上限与下限一致,甲醇爆炸极限范围皆集合于一点,甲醇不再有爆炸的危险.在抑爆能力方面二氧化碳要比氮气强.若达到同样抑爆程度,所需氮气的量要比二氧化碳的多.

The change of methanol explosion limits under the action of nitrogen and carbon dioxide was studied by using FRTA explosion limit tester, meanwhile the explosion suppression effect was analyzed and compared. According to the determination result, the graphical chart of law of explosion limits had been drawn by Origin drawing software, which showed that both nitrogen and carbon dioxide could re- duce the explosion limits and inhibit the explosion. When the concentration of nitrogen is 44% and the concentration of carbon dioxide is 33%, the methanol explosion limits coincides with a little, and the upper limit of methanol explosion is the same as the lower limit methanol is no longer the risk of explosion. The explosion suppression ability of Carbon dioxide is better than that of nitrogen. In order to come to the same degree of explosion suppression, the amount of nitrogen required is much more than that of carbon dioxide.