Analysis and optimization of distillation columns with feed splitting and preheating by considering a thermodynamic target

doi:10.16085/j.issn.1000-6613.2017.05.008

Chemical Industry and Engineering Progress ›› 2017, Vol. 36 ›› Issue (05): 1612-1618.DOI: 10.16085/j.issn.1000-6613.2017.05.008

Previous Articles Next Articles

Analysis and optimization of distillation columns with feed splitting and preheating by considering a thermodynamic target

LIU Xuegang¹, HE Chang¹, ZHANG Minkang¹, HE Changchun¹, LEI Yang², ZHANG Bingjian¹, CHEN Qinglin¹

1. School of Chemical Engineering and Technology/Guangdong Engineering Center for Petrochemical Energy Conservation, Sun Yat-Sen University, Guangzhou 510275, Guangdong, China;
2. School of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China

Received:2016-09-09 Revised:2016-09-28 Online:2017-05-05 Published:2017-05-05

考虑热力学目标的进料分流预热精馏塔分析优化

刘雪刚¹, 何畅¹, 张民康¹, 何昌春¹, 雷杨², 张冰剑¹, 陈清林¹

1. 中山大学化学工程与技术学院/广东省石化过程节能工程技术研究中心, 广东广州 510275;
2. 武汉科技大学化学工程与技术学院, 湖北武汉 430081

通讯作者: 陈清林,教授,博士生导师。
作者简介:刘雪刚(1985-),男,博士研究生。
基金资助:
国家自然科学基金项目（21276288）

Abstract

Abstract: The work systematically addresses an optimization approach of the energy-saving and hydraulic checking for distillation columns with feed splitting and preheating. To maximize the feed preheating efficiency (ratio of the reboiler duty reduction to the feed preheating duty),the key influencing parameters (e.g. amount of preheating,splitting fraction and feed locations) were adjusted by using invariant rectifying-stripping curves. Then,vapor-liquid distributing curve was employed to identify the tray with the lowest tray efficiency. Additionally,with the help of C++ programing and GUIDE tool in MATLAB,a professional hydraulic software,namely SYSU-DISTILL,with visualization window was developed. This software was used to analyze hydraulics of any tray with the lowest tray efficiency. A stabilization tower (it was assumed as an n-butane-n-hexane column) from the petroleum and chemical industry was used as an illustrative example. The thermodynamics results showed that an ideal feed preheating efficiency (100%) of this column can be reached when amount of preheating,splitting fraction and feed locations were 1000MJ/h,0.7 and 9/20,respectively. Meanwhile, the appropriate setting tray structure can achieve the goal of energy saving under guaranteeing normal operation of the distillation column from hydraulic checking. This work provided an insight into analysis and guidance in determining the optimal schemes for energy saving of actual distillation columns.

Key words: thermodynamics, invariant rectifying-stripping, petroleum, hydraulics checking, optimization

摘要： 系统地提出了一种进料分流预热精馏塔的节能优化与水力学校核优化方案。基于热力学工具固定精馏线-提馏线，可定量计算精馏塔获得100%理想预热效率（精馏塔再沸器负荷的减小量与进料预热量之比）时的操作参数，并利用气液分布曲线来确定效率最低的塔板；同时，基于C++和MATLAB中的GUIDE，进一步开发了具有可视化窗口的水力学验算软件，对效率最低的塔板进行水力学分析。以石油化工行业中稳定塔（简化为正丁烷-正己烷塔）为例，热力学研究结果表明，当预热量、分流率及进料位置分别设为1000MJ/h、0.7与9/20时，稳定塔可获得100%的理想预热效率；水力学核算发现，适当设置塔板结构可保证精馏塔在正常操作下实现节能的目的。本研究对实际精馏塔节能改造具有一定的指导意义。

关键词: 热力学, 固定精馏-提馏线, 石油, 水力学核算, 优化

CLC Number:

TQ028.3

LIU Xuegang, HE Chang, ZHANG Minkang, HE Changchun, LEI Yang, ZHANG Bingjian, CHEN Qinglin. Analysis and optimization of distillation columns with feed splitting and preheating by considering a thermodynamic target[J]. Chemical Industry and Engineering Progress, 2017, 36(05): 1612-1618.

刘雪刚, 何畅, 张民康, 何昌春, 雷杨, 张冰剑, 陈清林. 考虑热力学目标的进料分流预热精馏塔分析优化[J]. 化工进展, 2017, 36(05): 1612-1618.

References

[1] DHOLE V R,LINNHOFF B. Distillation column targets[J]. Computers and Chemical Engineering,1993,17(56):549-560.
[2] BANDYOPADHYAY S,MALIK R K,SHENOY U V. Feed preconditioning targets for distillation through invariant rectifying-stripping curves[J]. Industrial & Engineering Chemistry Research,2003,42(26):6851-6861.
[3] 吴升元,魏志强,张冰剑,等. 基于CGCC的分馏塔进料位置[J]. 化工进展,2011,30(s2):111-117. WU S Y,WEI Z Q,ZHANG B J. et al. Study on the feed location of distillation column based on CGCC[J]. Chemical Industry and Engineering Progress,2011,30(s2):111-117.
[4] ALFADALA H E,AHMAD B M,WARSAME A F. A hierarchical approach to optimize LNG fractionation units[J]. Computer Aided Chemical Engineering,2005,20(5):1279-1284.
[5] 刘雪刚,张冰剑,陈清林. 基于分馏塔总组合曲线进料位置与进料状态的同步优化[J]. 清华大学学报(自然科学版),2016,56(7):700-706. LIU X G,ZHANG B J,CHEN Q L. Simultaneous optimization of the feed location and thermodynamic feed conditions for a distillation column based on column grand composite curves[J]. Journal of Tsinghua University(Science and Technology),2016,56(7):700-706.
[6] FILIPE S P,ROGER Z,MEGAN J,et al. Thermodynamic optimization of distillation columns[J]. Chemical Engineering Science,2011,66(13):2920-2934.
[7] WEI Z Q,WU S Y,ZHANG B J,et al. An exergy grand composite curve based procedure for arranging side exchangers on distillation columns[J]. Computer Aided Chemical Engineering,2012,31(2):1592-1596.
[8] NGUYEN N,DEMIREL Y. Retrofit of distillation columns in biodiesel production plants[J]. Energy,2010,35(4):1625-1632.
[9] LEI Y,ZHANG B J,QI X,et al. Study on constraints for heat removal duties of the main fractionator in delayed coking units[J]. Applied Thermal Engineering,2014,71(1):573-580.
[10] CHEN T,ZHANG B J,CHEN Q L. Heat integration of fractionating systems in para-xylene plants based on column optimization[J]. Energy,2014,72(7):311-321.
[11] BANDYOPADHYAY S,MALIK R K,SHENOY U V. Temperature- enthalpy curve for energy targeting of distillation columns[J]. Computers & Chemical Engineering,1998,22(12):1733-1744.
[12] WEI Z Q,WU S Y,ZHANG B J,et al. A modified approach for generating column grand composite curves[J]. Chemical Engineering & Technology,2012,35(10):1817-1824.
[13] BANDYOPADHYAY S,MALIK R K,SHENOY U V. Invariant rectifying-stripping curves for targeting minimum energy and feed location in distillation[J]. Computers & Chemical Engineering,1999,23(8):1109-1124.
[14] BENEDICT M. Multistage separation processes[J]. Transactions American Institute of Chemical Engineering Journal. 1947,43(3):41-50.
[15] SOAVE G S,GAMBA S,PELLEGRINI L A,et al. Feed-splitting technique in cryogenic distillation[J]. Industrial & Engineering Chemistry Research,2006,45(16):5761-5765.
[16] SOAVE G,FELIU J A. Saving energy in distillation towers by feed splitting[J]. Applied Thermal Engineering,2002,22(8):889-896.
[17] MCCABE W L,SMITH J C,HARRIOTT P. Unit operations of chemical engineering[M]. 7th ed. McGraw Hill International Edition,2008:493-510.
[18] BANDYOPADHYAY S,MISHRA M,SHENOY U V. Energy-based targets for multiple-feed distillation columns[J]. AIChE Journal,2004,50(50):1837-1853.
[19] 陆恩锡,张慧娟,陈志奎,等. 催化裂化装置解吸塔工艺条件全面分析[J]. 化学工程,1998(1):29-32. LU E X,ZHANG H J,CHEN Z K,et al. A comprehensive analysis for the process parameters of the stripper of FCC unit[J]. Chemical Engineering,1998(1):29-32.

Analysis and optimization of distillation columns with feed splitting and preheating by considering a thermodynamic target

考虑热力学目标的进料分流预热精馏塔分析优化

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	WANG Zhengkun, LI Sifang. Green synthesis of gemini surfactant decyne diol [J]. Chemical Industry and Engineering Progress, 2023, 42(S1): 400-410.
[2]	LI Mengyuan, GUO Fan, LI Qunsheng. Simulation and optimization of the third and fourth distillation columns in the recovery section of polyvinyl alcohol production [J]. Chemical Industry and Engineering Progress, 2023, 42(S1): 113-123.
[3]	ZHANG Ruijie, LIU Zhilin, WANG Junwen, ZHANG Wei, HAN Deqiu, LI Ting, ZOU Xiong. On-line dynamic simulation and optimization of water-cooled cascade refrigeration system [J]. Chemical Industry and Engineering Progress, 2023, 42(S1): 124-132.
[4]	WANG Fu'an. Consumption and emission reduction of the reactor of 300kt/a propylene oxide process [J]. Chemical Industry and Engineering Progress, 2023, 42(S1): 213-218.
[5]	WANG Shengyan, DENG Shuai, ZHAO Ruikai. Research progress on carbon dioxide capture technology based on electric swing adsorption [J]. Chemical Industry and Engineering Progress, 2023, 42(S1): 233-245.
[6]	LI Chunli, HAN Xiaoguang, LIU Jiapeng, WANG Yatao, WANG Chenxi, WANG Honghai, PENG Sheng. Research progress of liquid distributors in packed columns [J]. Chemical Industry and Engineering Progress, 2023, 42(9): 4479-4495.
[7]	DONG Jiayu, WANG Simin. Experimental on ultrasound enhancement of para-xylene crystallization characteristics and regulation mechanism [J]. Chemical Industry and Engineering Progress, 2023, 42(9): 4504-4513.
[8]	LI Haidong, YANG Yuankun, GUO Shushu, WANG Benjin, YUE Tingting, FU Kaibin, WANG Zhe, HE Shouqin, YAO Jun, CHEN Shu. Effect of carbonization and calcination temperature on As(Ⅲ) removal performance of plant-based Fe-C microelectrolytic materials [J]. Chemical Industry and Engineering Progress, 2023, 42(7): 3652-3663.
[9]	TAN Lipeng, SHEN Jun, WANG Yugao, LIU Gang, XU Qingbai. Research progress on blending modification of coal tar pitch and petroleum asphalt [J]. Chemical Industry and Engineering Progress, 2023, 42(7): 3749-3759.
[10]	SUO Hansheng, JIA Mengda, SONG Guang, LIU Dongqing. Digital twin-driving force for petrochemical smart factory [J]. Chemical Industry and Engineering Progress, 2023, 42(7): 3365-3373.
[11]	LIN Hai, WANG Yufei. Distributed wind farm layout optimization considering noise constraint [J]. Chemical Industry and Engineering Progress, 2023, 42(7): 3394-3403.
[12]	YANG Xuzhao, LI Qing, YUAN Kangkang, ZHANG Yingying, HAN Jingli, WU Shide. Thermodynamic properties of Gemini ionic liquid based deep eutectic solvents [J]. Chemical Industry and Engineering Progress, 2023, 42(6): 3123-3129.
[13]	HOU Dianbao, HE Maoyong, CHEN Yugang, YANG Haiyun, LI Haimin. Application analysis of resource allocation optimization and circular economy in development and utilization of potassium resources [J]. Chemical Industry and Engineering Progress, 2023, 42(6): 3197-3208.
[14]	LI Ruolin, HE Shaolin, YUAN Hongying, LIU Boyue, JI Dongli, SONG Yang, LIU Bo, YU Jiqing, XU Yingjun. Effect of in-situ pyrolysis on physical properties of oil shale and groundwater quality [J]. Chemical Industry and Engineering Progress, 2023, 42(6): 3309-3318.
[15]	GU Shiya, DONG Yachao, LIU Linlin, ZHANG Lei, ZHUANG Yu, DU Jian. Design and optimization of pipeline system for carbon capture considering intermediate nodes [J]. Chemical Industry and Engineering Progress, 2023, 42(6): 2799-2808.