不同温度下原油蒸气的爆炸极限和临界氧含量

Explosion limits and critical oxygen content of crude oil vapor at different ambient temperatures

注空气采油因其过程中存在可燃性混合物,会有发生爆炸事故的可能。通过实验测定了15~150℃之间5个初始温度点原油蒸气的爆炸极限和临界氧含量,15℃时爆炸极限范围为4.62%~14.01%,150℃时爆炸极限范围变宽为4.24%~15.62%,安全氧含量15℃时为13.15%,150℃时降低到12.47%,得出了原油蒸气爆炸极限范围随温度升高而变宽,临界氧含量随温度升高而降低的结论,并运用数值分析原理拟合出原油蒸气爆炸极限和临界氧含量各自随温度变化的规律函数,对预测原油蒸气在其他温度下的爆炸极限和临界氧含量有一定意义。

An explosion accident is possible for process of oil recovery using air injection because of the existence of flammable mixture.So it is necessary to measure the explosion limits and the critical oxygen content of crude oil vapor at different temperatures from 15℃ to 150℃.The measurement result indicated that the explosion limit of crude oil vapor is 4.62%—14.01% at 15℃ and 4.24%—15.62% at 150℃,while the critical oxygen is 13.15% at 15℃ and 12.47% at 150℃.The range of explosion limit widens and the critical oxygen content decreases with temperature increasing.The correlations between explosion limits as well as critical oxygen content and temperature are founded through numerical analysis,which could be used for forecasting the explosion limits and the critical oxygen content of crude oil at different temperatures.