近几年来,我国石油工业迅速发展,液化石油气产量也日益增长,为改变我国城市燃料结构和发展以液化石油气为原料的化学工业创造了良好的条件。我国许多中小城市和厂矿也建成许多液化石油气储配站,但站建成竣工或贮罐大、中修以及定期安全开罐检查后,都应将空气从系统中排除干净。液化石油气是一种易燃易爆的气体,贮罐中空气排除不净容易引起爆炸事故。贮罐排空气的方法有下列几种: In recent years, with the rapid development of China’s petroleum industry and the increasing production of liquefied petroleum gas, favorable conditions have been created for changing the urban fuel structure in our country and developing the chemical industry using liquefied petroleum gas as raw material. Many small and medium-sized cities and factories and mines in our country have also built a lot of liquefied petroleum gas storage and distribution stations. However, when the stations are completed or the tanks are large, moderately repaired, and regularly open for safety inspection, the air should be excluded from the system. Liquefied petroleum gas is a flammable and explosive gas, which can easily cause an explosion accident if the air in the storage tank is not removed. There are several ways to vent the tank: