流化催化裂化提升管反应器的CFD-PBM耦合模型:矩方法适用性比较

doi:10.11949/j.issn.0438-1157.20160409

化工学报 ›› 2016, Vol. 67 ›› Issue (8): 3224-3233.DOI: 10.11949/j.issn.0438-1157.20160409

流化催化裂化提升管反应器的CFD-PBM耦合模型:矩方法适用性比较

梁晓飞, 姚亚, 罗正鸿

上海交通大学化学化工学院, 上海 200240

收稿日期:2016-03-31 修回日期:2016-05-16 出版日期:2016-08-05 发布日期:2016-08-05
通讯作者: 罗正鸿
基金资助:
国家重点基础研究发展计划项目（2012CB21500402）；国家自然科学基金项目（U1462101）。

Comparison of suitability of MOMs in solving CFD-PBM coupling model for FCC riser reactors

LIANG Xiaofei, YAO Ya, LUO Zhenghong

School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2016-03-31 Revised:2016-05-16 Online:2016-08-05 Published:2016-08-05
Supported by:
supported by the National Basic Research Program of China (2012CB21500402) and the National Natural Science Foundation of China (U1462101).

摘要/Abstract

摘要：

建立了描述FCC提升管中气-固流动行为的CFD-PBM耦合模型，模型同时考虑了颗粒动力学和颗粒聚并破碎内核。讨论了求解耦合模型中众体平衡方程（PBE）的3种典型矩方法[即：正交矩方法（quadrature method of moments，QMOM），直接正交矩方法（direct quadrature method of moments，DQMOM）和固定轴点正交矩方法（fixed pivot quadrature method of moments，FPQMOM）]对模拟结果的影响。研究结果表明3种矩方法均能合理预测提升管内径向和轴向颗粒体积分数和颗粒速度分布。通过将模拟结果与实验结果进行比较，表明QMOM在反应器结构简单情况下，计算结果更接近于实际情况。

关键词: 流化催化裂化, 计算流体力学, 颗粒粒群衡算, 矩方法

Abstract:

A CFD-PBM coupling model was developed to simulate turbulent gas-solid flow in FCC riser reactors with consideration of kinetics of granular flow as well as agglomeration and core breakage of particles. Three representative methods of numerical moments, namely, the quadrature method of moments (QMOM), the direct quadrature method of moments (DQMOM), and the fixed pivot quadrature method of moments (FPQMOM), were used to solve PBEs in the model and the simulation results were evaluated to compare the effect of each numerical method. All three MOMs could predict reasonably both radial and axial distributions of time-averaged volume fraction and velocity of particles in FCC riser reactors. Compared to DQMOM and FPQMOM, QMOM yielded calculations most agreeable to the experimental data with regards to time-averaged solid density distribution, solid mass flux distribution, and axial pressure drop. The study suggested that QMOM could be applied to solve PBEs in CFD-PBM coupling model for such simple structured reactors.

Key words: FCC, CFD, PBM, method of moments

中图分类号:

TQ02

梁晓飞, 姚亚, 罗正鸿. 流化催化裂化提升管反应器的CFD-PBM耦合模型:矩方法适用性比较[J]. 化工学报, 2016, 67(8): 3224-3233.

LIANG Xiaofei, YAO Ya, LUO Zhenghong. Comparison of suitability of MOMs in solving CFD-PBM coupling model for FCC riser reactors[J]. CIESC Journal, 2016, 67(8): 3224-3233.

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流化催化裂化提升管反应器的CFD-PBM耦合模型:矩方法适用性比较

Comparison of suitability of MOMs in solving CFD-PBM coupling model for FCC riser reactors

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