N2和CO2对液化石油气(LPG)惰化抑爆效能对比分析

为探究惰性气体对液化石油气（LPG）惰化抑爆效能的影响规律，本文运用可燃气体爆炸极限测定装置和可视化球型爆炸综合实验系统，分别测试了不同体积分数N₂和CO₂时，LPG的爆炸极限和压力特性参数并进行对比分析。结果表明：N₂和CO₂都会缩小液化石油气的爆炸极限，且对爆炸上限的影响程度更大；达到爆炸临界点时，CO₂体积分数为34%，小于N₂的43%，并且给出了爆炸危险区域的计算公式；在相同条件下，CO₂使得液化石油气的最大爆炸压力、最大爆炸压力上升速率降幅大于N₂的作用效果，且更好地降低了爆炸危险度和最大爆炸指数，提前了爆炸最猛烈程度的出现时间，减小爆炸危险时间。综合对比后发现，CO₂对LPG的抑爆性能要优于N₂。

Comparative analysis of the inert effects of N2 and CO2 on LPG explosion

In order to investigate the effect of inert gas on the suppression efficiency of liquefied petroleum gas (LPG), the explosion limit and pressure parameters of LPG with different volume fraction of N₂ and CO₂ were tested through the explosive limit measurement device of combustible gas and the visual spherical explosion comprehensive experimental system. The results obtained through the comparison and analysis showed that both N₂ and CO₂ will reduce the explosion limit of LPG and have a greater influence on the upper limit of explosion; when the critical point of explosion suppression was reached, the volume fraction of CO₂ (34%) was less than that of N₂ (43%), and the formula for calculating the dangerous explosion area was given. Under the same conditions, CO₂ has greater suppression effects on the explosion pressure and the rate of increase of the maximum explosion pressure of LPG than N₂, reduces the explosion risk and the maximum explosion index more effectively, and makes the occurrence time of the most violent degree of explosion advance and the explosion danger time reduce. After comprehensive comparison, it was found that the explosion suppression performance of CO₂ to LPG was better than that of N₂.