Abstract：
Deep stage separation of heavy oil is a new technique invented in recent years, which can simplify process and reduces equipment cost by coupling the supercritical extraction and spray granulation. In this process, pentane flash-boiling rate is a key factor to quality control of asphalt granulation. According to the mechanism of mass and heat transfer in the process of pressure-driven phase change, an empirical model was developed and implanted into commercial code Fluent for pentane flashboiling simulation. The flash-boiling flow simulation of the mixture pentane and asphalt was carried out. Simulation results show that the structure of nozzle has a vital effect on vaporization rate of pentane. The nozzle with conical section is fit for supercritical spray granulation. Furthermore, in this process, asphalt supplies more energy for the flash-boiling of pentane, which leads to the enhancement of the pentane vaporization rate.
NIE Yong-Guang, MAO Yu, WANG Jiang-Yun, WANG Juan.CFD Simulation of Supercritical Pentane Flash Boiling in Asphalt Granulation[J]. Chemcial Industry and Engineering, 2013,30(4): 68-72
2013, Vol. 30 
