Abstract
The mixed oil treatment of Product oil is an important task of pipeline enterprises. The paperconcluded that the on-line back mixing technology was feasible, compared treatment methods from the perspective of safety and economic benefits. TheProduct oil pipeline is taken as the research object in this paper, studied the concentration distribution of mixed Product oil and amount of mixed Product oilunder operation and shutdown condition, and brief studied Product oil On-line back mixing technology. Combined with the demand and pipeline length, the mixing test is determined at CD station and CQ station. The operation process as follow: First, Product oilsamples areextracted from the pipeline. Second, the index parameters are detected after the oil samples are mixed with different proportions, and obtaining the blending potential under the theoretical situation, the result show that the mixing potential of gasoline is greater than that of diesel. Third, the field test do with arbitrarily mixed oil download scheme, which study two mixed oil surfaces. The required fund of dealing with the mixed oil is obtained combined with the download amount of mixed oil.Finally, comparing with the funds of the previous contaminated treatment methods, it is concluded that the On-line Back Mixing technology has great advantages in both safety and economic benefits.
Highlights
Introduction to the testThe total length of LCY product oil pipeline is 1250 km, which uses closed transportation technology to transport No 92 and No 0 diesel, with an annual output of 700 × 104 t
The experimental results of the mixed oil samples are shown in tables 3 and 4.According to GB 19147-2016 Diesel fuel for vehicles, when the flash point of the mixed oil sample reaches 62°C, the gasoline volume ratio contained in the oil sample is the maximum mixing potential of diesel under the experimental conditions.Experimental data reference table 3
This paper mainly describes oil sampling experiment and the experimental results of configuration experiment of standard mixed oil sample of LCY product oil pipeline.The conclusions are as follows: (1) It can be concluded that the mixing potential of No 92 gasoline in this batch is large, and the concentration of mixed diesel oil is 0.5 %
Summary
The causes of mixed oil in the batch transportation of product oil pipeline mainly include convection-diffusion (convection transfer, flow velocity extension), molecular diffusion and turbulent diffusion in turbulent state [1]. Austin and Palfrey obtained the Austin-Palfrey empirical formula,which does not consider the influence of transportation sequence on the mixing oil[3].Ms Huang reviewed the research status of oil mixing amount in the sequential transportation of product oil pipelines with variable diameter at domestic and abroad, and analyzed the influence of variable diameter on oil mixing amount[4]. A product oil pipeline is taken as the research object, and the research content is mainly to obtain the maximum blending ratio of diesel and gasoline by mixing oil samples at CD station and CQ station. The mixed oil download scheme (only two mixed oil surfaces are studied) is selected for field test, and the requirements for processing this part of the mixed oil are obtained by combining the mixed oil download amount
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