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Chemcial Industry and Engineering 2017, Vol. 34 Issue (4) :62-68    DOI: 10.13353/j.issn.1004.9533.20151072
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Computational Fluid Dynamics Modeling of Two-Phase Flows in Vacuum Transfer Lines
Zhang Lvhong, Zhao Zongxian, Xiao Xiaoming
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract 

Vacuum transfers lines are pipelines connecting vacuum furnaces and distillation columns and are most important pipelines in petrochemical plants. A well-designed transfer line can help not only to increase the evaporation rate, but also to improve the product's quality and lower the energy consumption. In the present work, the DPM model was used to simulate the two-phase flow in transfer lines. The calculation result shows that the type of transition sections significantly affects the pressure and temperature drop within the pipeline. Multi-stage tube diameter expansions of transfer lines will reduce the fluctuation of the flow field. The usage of trousers-shaped three-way tubes will reduce the maximum velocity within pipelines. Most evaporated residual oil is the lighter component and the heavier residual oil evaporates slightly. Collisions between droplets and walls are most likely at the bends of transfer lines.

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Articles by authors
Zhang Lvhong
Zhao Zongxian
Xiao Xiaoming
Keywordsvacuum transfer line;   residual oil;   computational fluid dynamics;   pressure distribution;   flow rate;   evaporation rate     
Received 2015-04-28;
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Zhang Lvhong, Zhao Zongxian, Xiao Xiaoming.Computational Fluid Dynamics Modeling of Two-Phase Flows in Vacuum Transfer Lines[J]  Chemcial Industry and Engineering, 2017,V34(4): 62-68
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