Design-oriented thermodynamic analysis of novel heat-integrated C5 isomeride distillation scheme on pilot scale

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• 作者：Jinsheng Sun 孙津璿/a> ; Leilei Dai 戴雷陿/a> ; Tingting Ma 马婷姿/a>…
• 关键词：C5 foaming agent ; process simulation ; energy saving ; column grand composite curve(CGCC) ; exergy analysis
• 刊名：Transactions of Tianjin University
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：22
• 期：1
• 页码：77-82
• 全文大小：627 KB
• 参考文献：[1]Ma Fei, Zhang Jing, Wang Yulin et al. Energy-Saving Process with Pressure Thermally Coupled Distillation Technology for Producing High Purity Pentane: CN, 201010253366.1[P]. 2011-01-05(in Chinese).
  [2]Sun Jinsheng, Gao Hong, Wang Yanhong et al. A Method System of Double-Effect Distillation for Separating Pentane Isomers: CN, 200910069668.0[P]. 2009-12-06(in Chinese).
  [3]Li Chong, Wang Fang, Miao Xiangyang et al. An Energy-Saving Process for Producing High Purity Pentane and Foaming Agent: CN, 200610014353.2[P]. 2007-02-28(in Chinese).
  [4]Bakhtiari B, Fradette L, Legros R et al. Retrofit of absorption heat pumps into manufacturing processes: Implementation guidelines[J]. Can J Chem Eng, 2010, 88(5): 839–848.
  [5]Nakaiwa M, Huang K, Endo A et al. Internally heat integrated distillation columns: A review[J]. Chem Eng Res Des, 2003, 81(1): 162–177.CrossRef
  [6]Kim Y H. Internally heat-integrated distillation system for quaternary separation[J]. Chem Eng Res Des, 2001, 89(12): 2495–2500.CrossRef
  [7]Usman M A, Ajayi T O, Famoriyo K I. Comparison of vapor recompression and thermal coupling for energy reduction in binary distillation[J]. Journal of Emerging Trends in Engineering and Applied Sciences, 2012, 3(1): 188–194.
  [8]Ajayi T O, Usman M A, Adeleye O O. Available options for the knockdown of energy consumption in distillation columns [J]. Journal of the Nigerian Society of Chemical Engineers, 1999, 18(1): 1–12.
  [9]Engelien H K, Skogestad S. Multi-effect distillation applied to an industrial case study[J]. Chem Eng Process, 2005, 44(8): 819–826.CrossRef
  [10]Dias M O S, Modesto M, Ensinas A V et al. Improving bioethanol production from sugarcane: Evaluation of distillation, thermal integration and cogeneration systems[J]. Energy, 2011, 36(6): 3691–3703.CrossRef
  [11]Bessa L C B A, Batista F R M, Meirelles A J A. Doubleeffect integration of multicomponent alcoholic distillation columns[J]. Energy, 2012, 45(1): 603–612.CrossRef
  [12]Kotas T J. The Exergy Method of Thermal Plant Analysis[M]. Paragon Publishing, London, UK, 1985.
  
• 作者单位：Jinsheng Sun 孙津生 (1)
  Leilei Dai 戴雷雷 (2)
  Tingting Ma 马婷婷 (1)
  Changning Guo 郭长宁 (1)
  Hongyuan Wei 卫宏远 (1)
  Zhenghu Li 李正虎 (3)
  
  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
  2. Sinopec Jinling Petrochemical Co., Ltd, Nanjing, 210033, China
  3. Ningbo Xinlongxin Chemical Co., Ltd, Ningbo, 315800, China
  
• 刊物类别：Engineering
• 刊物主题：Chinese Library of Science
  
• 出版者：Tianjin University
• ISSN：1995-8196

文摘

A novel heat-integrated distillation scheme on pilot scale for producing C5 foaming agent, a mixture of isopentane and pentane in a certain proportion, was proposed with the aid of process simulation. Compared with the conventional distillation scheme, C5 foaming agent was directly separated at the top of the original isopentane or pentane column in the novel scheme, instead of first refining the two isomerides to high purities and then mixing them into final products. This improvement reduced the difficulty of the separation and avoided meaningless exergy loss caused by re-mixing, which finally contributed to an energy-efficient design by a big margin. Moreover, the column grand composite curves(CGCCs)were used to modify all distillation columns, indicating that there is potential to improve the energy efficiency further. Therefore, double-effect, or heat-integrated distillation was also adopted. Energy and exergy analyses were then conducted to evaluate the effectiveness of the proposed scheme for the purpose of energy saving. The simulation results of the conventional distillation scheme were in agreement with its on-site counterpart. Analyses showed that the novel heat-integrated scheme reduced hot utility by 27.12%,, cold utility by 24.49%,, and total exergy loss by 23.95%,.