Quantitative Calculation and Emission Reduction Measures of VOCs Emissions from Crude Oil Storage Tank Based on AP-42 Model
Volatile Organic Compounds(VOCs)are ubiquitous in the storage and blending processes of crude oil.To achieve effective control of VOCs emissions from crude oil storage tanks,this study uses the AP-42 model as a foundation and employs scenario analysis and the method of controlling variables to examine the extent to which different factors affect VOCs emissions.Targeted emission reduction suggestions are also proposed.The results indicated that the VOCs emission of the fixed roof tank was the largest,and the VOCs emission of the internal floating roof tank was the smallest.The molar molecular weight and saturated vapor pressure of oil were linearly and exponentially correlated with VOCs emission,respectively.Different sealing methods have great influence on VOCs emission,the liquid inlay in the primary seal is the best,and the edge scraper in the secondary seal is slightly better.The liquid Mosaic and edge scraper seal mode had the smallest VOCs emissions,and the VOCs emissions of the inner and outer floating roof tanks could be reduced by 95.60%and 94.96%,respectively.Wind speed has no effect on VOCs emission in fixed tank and floating roof tank.When the number of turnover exceeded 20 times in the year,the growth rate of work loss or wall loss slowed down due to frequent loading and unloading of oil.It is suggested that the emission reduction prevention and control of VOCs should be realized in optimizing the type of storage tank,controlling the quality of oil and optimizing the sealing method.
AP-42 modelcrude oil storage tankVOCswork losswall loss
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