3D numerical simulation of flow characteristics for Geldart B and Geldart D particles in gas phase ethylene polymerization fluidized-bed reactor

被引：0

作者：

Che Y. ^{[1
]}

Tian Z. ^{[2
]}

Zhang R. ^{[3
]}

Gao Y. ^{[3
]}

Zou E. ^{[3
]}

Wang S. ^{[3
]}

Liu B. ^{[1
]}

机构：

[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai

[2] Key Laboratory of Advanced Control and Optimization for Chemical Processes, Ministry of Education, East China University of Science and Technology, Shanghai

[3] Daqing Petrochemical Research Center, Petrochemical Research Institute of PetroChina, Daqing, 163714, Heilongjiang

来源：

Tian, Zhou (tianzhou@ecust.edu.cn) | 1600年 / Materials China卷 / 67期

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

CFD; Fluidized-bed; Geldart D particles; Non-pelletizing PE production process; Particle size distribution; Polyethylene;

D O I：

10.11949/j.issn.0438-1157.20151205

中图分类号：

学科分类号：

摘要：

The status of polyethylene (PE) particle size and distribution, bubble generation and movement, and polymerization reaction in gas phase ethylene polymerization fluidized-bed reactor (FBR) is significant for PE production process, reactor design, optimization and control. Based on 3 dimensional (3D) Eulerian-Eulerian two-fluid model combined with a population balance model (PBM), this work aims to explore the two-phase flow characteristics and the effects of traditional PE production process (Geldart B particles) and non-pelletizing PE production process (Geldart D particles) on the operating behaviors in a pilot-plant FBR. The simulation results match well with the industrial measured pressure drop and temperature data. It is also found that the polymer particles observably concentrated on the bed inlet region for the effects of Geldart D particles and superfical gas velocity. In addition, the obvious vortexes and large bubbles can be clearly observed in the bed height direction. The results could provide foundation for the extension and application of the non-pelletizing PE production process. © All Right Reserved.

引用

页码：519 / 529

页数：10

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