Hydrodynamics and Mass-Transfer Analysis of a Distillation Ripple Tray by Computational Fluid Dynamics Simulation

被引:21
作者
Jiang, Bin [1 ,2 ]
Liu, Pengfei [1 ]
Zhang, Luhong [1 ]
Sun, Yongli [1 ,2 ]
Wang, Huajin [1 ]
Liu, Yuhua [3 ]
Fang, Zhao [3 ]
机构
[1] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
[2] Tianjin Univ, Natl Engn Res Ctr Distillat Technol, Tianjin 300072, Peoples R China
[3] Peiyang Natl Distillat Technol Corp Ltd Co, Tianjin, Peoples R China
关键词
DUALFLOW TRAYS; SIEVE TRAYS; COLUMNS; LIQUID; MODEL; GAS; PREDICTION; EFFICIENCY; VALVE;
D O I
10.1021/ie402822w
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A 3D two-phase computational fluid dynamics model in the Eulerian-Eulerian framework was developed to predict the hydrodynamics, mass-transfer behaviors, and tray efficiency of dual-flow trays: ripple trays. Interaction between the two phases occurs via interphase momentum and mass transfer. Mass-transfer coefficients were estimated using the Higbie penetration theory model. The simulated results were compared with the experimental data obtained from distillation of cyclohexane and n-heptane at total reflux. The results show that vapor and liquid flow countercurrently through the tray holes and four main hydrodynamic regimes are distinguished at different vapor/liquid loadings (F-s factor). It was found that the mass transfer of the spray zone above the froth was also significant, especially at lower loadings. In addition, the results indicated that the efficiency of a ripple tray was a strong function of the open hole area and F-s factor.
引用
收藏
页码:17618 / 17626
页数:9
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