化工学报Issue(8)：2911-2919,9.DOI:10.11949/j.issn.0438-1157.20150821
基于EMMS模型的大型催化裂化装置再生器气固分布数值模拟
EMMS-based numerical simulation on gas and solids distribution in large-scale FCC regenerators
摘要
Abstract
Micro-scale discrete particle method (DPM) and meso-scale computational fluid dynamics (CFD) simulations, both based on the energy-minimization multi-scale (EMMS) model, were carried out on the complex gas-solid flow in the regenerators of fluid catalytic cracking (FCC), aiming to provide visualized quantitative analysis for the performance improvement of the newly designed systems with unprecedented 7 Mt·a−1 throughput. For verification, a current 3.5 Mt·a−1 regenerator was first successfully simulated. Then, a 7 Mt·a−1 regenerator was simulated to investigate the performance of the air and solids distributors. The simulation results showed that increasing the gas ring number from 2 to 3 can improve the homogeneity of solids distribution significantly, while increasing the gas inlet number from 1 to 2 for the 3-gas-ring case made little improvement. For solid phase distributor, the injection of solids and their mixing with the internal material were simulated and analyzed. It was demonstrated that decreasing the hole fraction can effectively increase the resistance and improve the mixing performance. The necessity of understanding the detailed flow field around the nozzles for further improvements is demonstrated, and EMMS-DPM can be a powerful tool for this purpose.关键词
EMMS模型/EMMS-DPM/催化裂化再生器/气体分布器/固体分布器/混合Key words
EMMS model/EMMS-DPM/FCC regenerator/gas distributor/solids distributor/mixing分类
化学化工引用本文复制引用
刘雅宁,鲁波娜,卢利强,陈飞国,葛蔚,吴雷,王韶华,李静海..基于EMMS模型的大型催化裂化装置再生器气固分布数值模拟[J].化工学报,2015,(8):2911-2919,9.基金项目
国家自然科学基金项目（21306201，21225628）；国家科技支撑计划项目（2012BAE05B01）。 （）
