化工学报 ›› 2018, Vol. 69 ›› Issue (3): 943-952.DOI: 10.11949/j.issn.0438-1157.20171127

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面向CO2分离的膜-深冷耦合过程优化

胡永欣1, 廖祖维2, 王靖岱2, 董宏光3, 阳永荣2   

  1. 1 浙江省化工高效制造技术重点实验室, 浙江大学化学工程与生物工程学院, 浙江 杭州 310027;
    2 浙江大学化学工程与生物工程学院, 化学工程联合国家重点实验室, 浙江 杭州 310027;
    3 大连理工大学化工学院, 辽宁 大连 116024
  • 收稿日期:2017-08-18 修回日期:2017-08-30 出版日期:2018-03-05 发布日期:2018-03-05
  • 通讯作者: 廖祖维
  • 基金资助:

    国家自然科学基金项目(91434205,61590925);国家杰出青年科学基金项目(21525627)。

Process optimization of CO2membrane and cryogenic hybrid separation

HU Yongxin1, LIAO Zuwei2, WANG Jingdai2, DONG Hongguang3, YANG Yongrong2   

  1. 1 Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;
    2 State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;
    3 School of Chemical Engineering, Dalian University of Science and Technology, Dalian 116024, Liaoning, China
  • Received:2017-08-18 Revised:2017-08-30 Online:2018-03-05 Published:2018-03-05
  • Supported by:

    supported by the National Natural Science Foundation of China (91434205,61590925) and the National Science Fund for Distinguished Young Scholars(21525627).

摘要:

二氧化碳的分离与纯化是当前的研究热点,而随着环保要求的提高,传统单一的分离手段难以满足行业要求,多种分离方法的集成逐渐得到研究者的重视。以整体煤气化联合循环发电系统(IGCC)流程中二氧化碳的分离与回收环节为例,在流程模拟的基础上,拟合出该体系状态方程的多项式形式。进一步,构建耦合膜-闪蒸超结构数学模型,在设定最低产物纯度和回收率的情况下,以最小化年度费用为目标,筛选出最优的分离序列。

关键词: 二氧化碳, 回收, 膜, 耦合, 分离序列优化, 超结构

Abstract:

Separation and purification of carbon dioxide is current research hotspot. With increasing needs for environmental protection, traditional single separation techniques are difficult to meet these discharge specifications. Integration of multiple separation methods has gradually gained research attention. Separation and recovery of carbon dioxide in the integrated gasification combined cycle (IGCC) process was studied by process simulation and polynomial state equations were obtained for such system. Furthermore, a mathematical superstructure model of hybrid membrane-cryogenic flash distillation was established. Optimal separation sequence was found by targeting minimal annual cost at pre-set lower specification of product purity and recovery. The optimized process show excellent separating performance of membrane after flash configuration and multistage membrane structure. Compared to control process, optimized process not only guarantees product recovery and purity but also decreases total annual cost by almost 27%.

Key words: carbon dioxide, recovery, membrane, hybrid, optimization of separation sequence, superstructure

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