盘管组倾角对浮顶油罐内含蜡原油融化过程的影响研究

利用盘管组来加热融化浮顶油罐内含蜡原油是油罐加热融化的主要方式之一。而优化盘管组的布置方式对提高罐内含蜡原油的融化效率、降低生产成本具有重要的意义。基于此，在考虑含蜡原油融化过程中形态和流变性变化的基础上，建立了盘管组加热的浮顶油罐内含蜡原油湍流融化物理数学模型。考虑到罐顶空气层、钢板层、保温层的规则性以及罐内含蜡原油区域的非规则性，利用浸入边界法在结构化网格上处理罐内含蜡原油与盘管组之间的耦合问题。利用文献结果对模型进行验证。以实际1000 m³浮顶油罐为例，对罐内含蜡原油的融化规律进行研究，并对倾角对融化过程的影响进行分析。

Study on influence of inclination of coils on melting process of waxy crude oil in a floating roof tank

Heating by coils are the most common used way for heating and melting waxy crude oil in a floating roof tank. And optimizing the layout of coils in the tank helps to improve the melting efficiency and reduce production cost. For this purpose, deep investigation on the temperature increase and melting processes of waxy crude oil by coil heating is necessary. This research establishes a physical and mathematical model describing the processes based on a comprehensive consideration of structure and rheological changes of the oil as well as the influence of turbulent flow during melting. Considering the irregularity of the oil domain and the regularity of other parts of the tank, immersed boundary method is employed to realize integrated calculation on structured grids over the whole computational domain. Results in literatures are used for model validation. Then the temperature increase and melting processes of waxy crude oil are simulated under three projects of coil layout. Taking an actual 1000 m³ floating roof oil tank as an example, the melting law of waxy crude oil in the tank is studied, and the influence of the inclination angle on the melting process is analyzed.