基于多尺度模型的MIP提升管反应历程数值模拟

doi:10.3969/j.issn.0438-1157.2013.06.012

化工学报 ›› 2013, Vol. 64 ›› Issue (6): 1983-1992.doi: 10.3969/j.issn.0438-1157.2013.06.012

基于多尺度模型的MIP提升管反应历程数值模拟

鲁波娜¹, 程从礼², 鲁维民², 王维¹, 许友好²

1. 中国科学院过程工程研究所,多相复杂系统国家重点实验室,北京 100190;
2. 中国石化石油化工科学研究院,北京 100083

收稿日期:2012-09-18 修回日期:2012-10-25 出版日期:2013-06-05 发布日期:2013-06-05
通讯作者: 鲁波娜(1979—),女,博士。
作者简介:鲁波娜(1979—),女,博士。
基金资助:
中国石油化工股份有限公司资助项目(110009);国家自然科学基金项目(21106157)。

Numerical simulation of reaction process in MIP riser based on multi-scale model

LU Bona¹, CHENG Congli², LU Weimin², WANG Wei¹, XU Youhao²

1. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2. Research Institute of Petroleum Processing, Sinopec, Beijing 100083, China

Received:2012-09-18 Revised:2012-10-25 Published:2013-06-05 Online:2013-06-05
Supported by:
supported by the SINOPEC(110009)and the National Natural Science Foundation of China(21106157).

摘要/Abstract

摘要： MIP(maximizing iso-paraffins process)工艺采用两个反应器串联技术,可有效改善汽油质量。MIP反应器的冷态模拟虽能揭示反应器内的流动行为及几何结构的影响,但无法考虑反应引发的变化。为更准确地揭示该反应器中的油气及颗粒运动行为,尝试了三维瞬态反应模拟。模拟采用双流体模型结合十二集总反应动力学模型,并在相间动量传递模型和传热模型中考虑了多尺度结构的影响,然后与基于均匀分布的传统模型作对比。结果表明,相比于传统模型,多尺度模型能较准确预测二反段内的流动结构、颗粒浓度以及温度分布。在预测产率方面,两种模型所得结果类似,都对油浆和柴油的预测较好,对液化气和干气的预测偏差较大。这说明,仅在动量传递及传热模型中考虑多尺度结构的影响是不够的。

关键词: 模拟, 多尺度模型, EMMS, 集总反应动力学, 双流体模型

Abstract: MIP (maximizing iso-paraffins process) process utilizes the technique of linking two reaction zones in series, and hence effectively improves gasoline quality.Cold simulation of MIP reactors can reveal the flow structures in the second reaction zone and also the effects of geometrical structures, but cannot provide the changes in hydrodynamics resulting from catalytic cracking reactions.To capture these changes, this work aimed at carrying out three-dimensional simulation of the MIP reactor by considering the reactions.The simulation was based on the two-fluid model and 12-lump kinetic model.The inter-phase momentum transfer and heat transfer models took into account the effects of multi-scale flow structures, and were compared with the traditional models based on homogeneous state.The simulation found that the multi-scale models could reasonably predict the flow structures and solids volume fraction in the second reaction zone as well as the temperature profiles, compared to the traditional model.For predicting product yields, both models showed similar results.They had good predictions in slurry and diesel, but fail to predict LPG and dry gas.The above finding implied that the effects of multi-scale structures should not only be considered in the momentum transfer and heat transfer models, but also be taken into account in the lumped kinetic model.

Key words: simulation, multi-scale model, EMMS, lumped reaction kinetics, two-fluid model

中图分类号:

TQ021.1

鲁波娜, 程从礼, 鲁维民, 王维, 许友好. 基于多尺度模型的MIP提升管反应历程数值模拟[J]. 化工学报, 2013, 64(6): 1983-1992.

Bona LU, Congli CHENG, Weimin LU, Wei WANG, Youhao XU. Numerical simulation of reaction process in MIP riser based on multi-scale model[J]. CIESC Journal, 2013, 64(6): 1983-1992.

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基于多尺度模型的MIP提升管反应历程数值模拟

Numerical simulation of reaction process in MIP riser based on multi-scale model

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