渣油加氢沸腾床的多相流流动特性模拟  

Numerical Investigation on Multiphase Fluid Flow in Residue Hydrodesulfurization Ebullated Bed

作　　者：辛亚男[1] 薛青普[1] 张建文[1] 张健[1] 

机构地区：[1]北京化工大学,北京100029

出　　处：《当代化工》2018年第2期294-297,301,共5页Contemporary Chemical Industry

基　　金：国家科技支撑计划;项目号:2015BAK39B02

摘　　要：采用欧拉-欧拉-欧拉三相流模型,对STRONG沸腾床渣油加氢反应器进行了二维冷模多相流动过程模拟。其中液-固相间作用力采用Syamlal-O’Brien模型,气-液相间作用力采用Schiller-naumann模型,忽略气固之间的作用力。由气含率、液含率、固含率云图随时间的变化,可以看出催化剂在气液两相的作用下,逐渐实现了流化;在三相分离器的作用下,气相、液相、固相实现了分离,气相富集在三相分离器上端,液相从侧出口流出,固相在流化床内实现了循环利用。同时模拟结果表明,三相分离器分离效果理想,但是在局部截面积较小和结构复杂地方会出现局部湍流,不利于分离的进行。The Eulerian-Eulerian-Eulerian three-phase flow model was used to simulate the multiphase flow process of the STRONG ebullated bed residue hydrogenation reactor in cold model, which applied the Syamlal-O ＇Brien model to simulate the interphase force between the liquid and solid, the Schiller-naumann model to simulate the interphase force between gas and liquid, and ignored the interphase force between gas and solid. By analyzing the holdup distribution of gas, liquid and solid at different time, it can be seen that the catalyst was gradually fluidized under the effect of gas and liquid. Under the effect of three-phase separator, the separation of gas, liquid and solid phase was achieved. The gas was concentrated in the top, liquid-phase flowed out from side outlet, and solid-phase was recycled in fluidized bed. The result showed that the separation effect of three-phase separator was ideal, but local small area and complex structure would lead to local turbulence, which was not conducive to the separation.

关 键 词：沸腾床 三相流 三相分离器 模拟 

分 类 号：TE65[石油与天然气工程—油气加工工程] TQ028.4[化学工程]