高温高压气体在氧气中爆炸下限的数值预测与实验研究  

Numerical Prediction and Experiment Research of Lower Flammability Limits of Combustible Gases in Oxygen at High Temperature and Pressure

作　　者：万鑫[1] 王敏[1] 曹春艳[1] 赵爽[1] IVANXin;WANG Min;CAO Chun-yan;ZHAO Sluiang(College of Chemistry and Materials Engineering,Bohai University,Jinzhou Liaoning 121000,China)

机构地区：[1]渤海大学化学与材料工程学院,辽宁锦州121000

出　　处：《当代化工》2022年第4期820-823,828,共5页Contemporary Chemical Industry

基　　金：辽宁省教育厅项目(项目编号:LQ2017010)。

摘　　要：提出了高温高压下气体在氧气中的爆炸下限数值预测模型,并对25~90℃、0.2~0.6MPa下甲烷在氧气中的爆炸下限进行了实验测定。结果表明:随着温度的升高,甲烷爆炸下限的实验值逐渐降低。爆炸下限的预测值与实验值相对误差最大值仅为1.29%,实现了可燃气体在氧气中爆炸下限的准确预测。对于燃料-氧气体系,温度的升高对可燃气体在氧气中的影响比在空气中更为显著,爆炸下限下降的速率更快,说明爆炸危险性更高。An approach was presented for predicting the lower flammability limits(LFL) of fuels in oxygen at elevated pressures and temperatures. And the LFL value for methane in oxygen was experimentally determined at range of 25~90 ℃ and 0.2~0.6 MPa. The results showed that the experimental values decreased with increasing temperatures,and the maximum relative error between the predicted value of the LFL and the experimental value was 1.29 %, and an accurate prediction of the LFL for fuel in oxygen was realized. For fuel-oxygen systems, the increase of temperature had greater effect on combustible gases in oxygen than in air, and the LFL decreased faster, indicating a higher risk of explosion.

关 键 词：高温高压 爆炸下限 氧气 

分 类 号：TQ038.1[化学工程]