关键词: 旋风分离器, 数值模拟, 分离效率, 进口流量, 柱段和锥段长度

Abstract: The cyclone separator has high separation efficiency and is not easy to be blocked，it has good effect on the natural gas dewaxing. Numerical simulation of the two-phase flow of the CYG-S natural gas dewaxing cyclone separator was studied by using CFD software Fluent，and get the internal pressure，tangent and axial velocity distributions. The simulation and calculated cut size x50 in different inlet velocity are contrasted，the results has a good degree of agreement，so the two-phase simulation are reliable. The results show that the mass concentration of paraffin droplet is higher at the bottom of the cone section. With the increasing of the inlet flow，the separation efficiency of cyclone separator was improved，under the 1000 m3/h inlet flow，the x50 can reach 5.3 μm. However，in the studied range of inlet flow，the increase rate of the drop less than 5μm is not obvious. The lengthened of column and taper section increases the length of cyclone separator，extents the residence time of the droplets in the cyclone separator，and improves the separation efficiency of the cyclone separator.

Key words: cyclone separator, numerical simulation, separation efficiency, inlet flow, column and taper section length