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Impact of temperature and Nitrogen on lower explosion limit of oil

WU Qianqian;ZHU Shunbing;CAO Yuan;ZHOU Zheng;LI Mingxin;College of Safety Science and Engineering,Nanjing Tech University;  
For the sake of assessing the explosion risk characteristics of A product flammable vapors during coal process,FRTA(flammable range test apparatus)explosion limit instrument was used to determine lower explosion limit under different temperature and different nitrogen content and analyze the impact on lower explosion limit of oil vapor.The results show that when the initial temperature is 30,60,90,120and140 ℃,the lower explosion limit and the initial temperature of the oil vapor is nonlinear relationship,gradually reducing with the increase of temperature.After the initial temperature is above 120 ℃,the trend of lower explosion limit is decreased.Under the same temperature and different nitrogen content,the lower explosion limit of oil vapor within a certain range increases with the increase of nitrogen content.Under different temperature and nitrogen content,the lower explosion limit of the oil vapor is changed by the double action of temperature and nitrogen,so that the lower explosion limit is more obvious.
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