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一、概况我厂现有各种轻质油拱顶罐63台,储存介质包括:原油、汽油、石脑油、溶剂油、煤油等。由于现有的拱顶罐设计承受内压为200毫米水柱,远远低于常温下汽油的饱和蒸汽压,加上罐顶呼吸阀不严密,透光孔、检尺孔封盖不严等因素,造成的大呼吸损失(进油过程中的损失)和小呼吸损失(储存过程中的损失)相当可观。根据1981年2月和1983年11月两次实洲的结果,储存汽油的拱顶罐收油时,大呼吸损失量为每收1米~3汽油损失1.14～1.16公斤。如以年产汽油54万吨计,仅大
I. Overview I plant a variety of existing light oil vault 63 units, storage media include: crude oil, gasoline, naphtha, solvent oil, kerosene and so on. As the existing dome tank design withstand internal pressure of 200 mm water column, far below the saturated vapor pressure of gasoline at room temperature, coupled with the top of the tank valve is not tight, light hole, inspection hole and other factors , Resulting in significant respiratory loss (loss of oil into the process) and small respiratory loss (loss during storage) is considerable. According to the results of the two solid-state flights in February 1981 and November 1983, the maximum respiratory loss was 1.14 to 1.16 kilograms for every 1 to 3 meters of petrol lost when the dome tank containing petrol was stored. As an annual output of 540,000 tons of gasoline, only large