文献类型：期刊文献

英文题名：An Insight into the Temperature Field and Particle Flow Patterns in a Fluidized Bed Reactor for Nonpelletizing Polyethylene Process Using a 3D CFD-PBM Model

作者：Che, Yu[1];Tian, Zhou[2];Liu, Zhen[1];Zhang, Rui[3];Gao, Yuxin[3];Zou, Enguang[3];Wang, Sihan[3];Liu, Boping[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, State Key Lab Chem Engn, Meilong Rd 130, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Minist Educ, Key Lab Adv Control & Optimizat Chem Proc, Meilong Rd 130, Shanghai 200237, Peoples R China;[3]PetroChina, Petrochem Res Inst, Daqing Petrochem Res Ctr, Chengxiang Rd 2, Daqing 163714, Heilongjiang, Peoples R China

年份：2016

卷号：55

期号：30

起止页码：8258

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20163202702464);WOS:【SCI-EXPANDED(收录号:WOS:000381062800004)】；

基金：This work is financially supported by the National High Technology Research and Development Program 863 (No. 2012AA040306), the National Natural Science Foundation of China (21406061), the Shanghai Municipal Natural Science Foundation (14ZR1410600), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Fluidized bed furnaces - Particle size - Flow patterns - Computational fluid dynamics - Temperature - Fluid catalytic cracking - Fluidized beds - Pilot plants - Chemical reactors - Ethylene - Fluidization - Supersaturation

摘要：This work aims at exploring the temperature and polyethylene (PE) particle flow patterns in a pilot-plant fluidized bed reactor via 3D CFD modeling approach. A Eulerian-Eulerian model involving ethylene polymerization kinetics is integrated with population balance model to investigate the issues for both traditional pelletizing PE process (TPPP) and nonpelletizing PE process (NPPP). The results show that the regions with large temperature gradients have been observed in top area. The revealed particle flow patterns in two cases are analyzed using four typical flow patterns (patterns a-d) reported in literature. PE particles are vigorously contacted and mixed along the lateral and vertical planes of the reactor in TPPP (patterns b-d). Solid dispersion is intensely enhanced in the bed vertical direction (pattern d), and the flow patterns show larger circular flow (pattern a) in the radial direction under NPPP due to the larger particle size and gas velocity.