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Debottlenecking and Retrofitting by Pinch Analysis in a Chemical Plant

Received: 2 October 2017     Accepted: 27 October 2017     Published: 11 December 2017
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Abstract

Energy saving, global warming and greenhouse gas emissions have become major technological, social and political issues. Being closely related to energy supply, they are of a strategic significance. Today, especially energy-sensitive industries such as refining and petrochemical are targeting to recover maximum amount of energy by applying Process Integration (PI) that deals with the energy efficiency, waste minimization and effective use of raw materials. Pinch Analysis is a structured approach and a systematic tool of PI. The prime objective of Pinch Analysis is to achieve financial savings by better process heat integration and reduce the externally provided energy requirements by recovering the maximum amount of energy within the system. It is also employed to improve effluent quality, reduce emissions, increase product yield and improve the flexibility and safety of the process. Properly calculated pinch targets have economic implications such as reduction of operating cost and capital investment. This study deals with energy saving strategies in a real VCM (Vinyl-Chloride-Monomer) plant by applying pinch method. The prime objective of this work is to achieve financial savings by better process heat integration (maximizing process-to-process heat recovery and reducing the external utility loads). It examines the existing process and introduces two alternative retrofit cases. Targets for heat recovery and utilities have been calculated (taking ΔTmin=10°C). Existing process and alternative cases have been compared. According to Retrofit 1, energy recovery reaches up to 12.51% whereas utility reduction is 57.24%. Retrofit 2 states that the recovered energy is 10.45% while the utility reduction is 47.83%. The results obtained indicate that there is a remarkable improvement in energy recovery and utility saving.

Published in American Journal of Energy Engineering (Volume 5, Issue 5)
DOI 10.11648/j.ajee.20170505.13
Page(s) 39-49
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

Process Integration, Pinch Analysis, Heat Recovery, Energy Saving

References
[1] Raskovic, P., Stoiljkovic, S., Pinch design method in the case of a limited number of process streams, Enery 34, 2009, pp. 593-612.
[2] Yoon, S. G., Lee, J., Park, S., Heat integration analysis for an industrial etylbenzene plant using pinch analysis, Applied Thermal Engineering, 27, 2007, pp.886-893.
[3] Wan Alwi, S. R., Manan, Z. A., STEP-a graphical tool for simultaneous targeting and design of heat exchanger network, Chemical Engineering Journal 162, 2010, pp.106-121.
[4] March, L., Introduction to Pinch Technology, Targeting House, England, 1998.
[5] Douglas, J. M., Conceptual Design of Chemical Processes, McGraw-Hill, New York, 1998.
[6] Kemp, J. C., Pinch Analysis and Process Integration: A User Guide on Process Integration of Efficient Use of Energy, 2nd Ed., Elsevier, Oxford, 2007.
[7] Friedler, F., Process integration, modelling and optimization for energy saving and pollution, reduction, Applied Thermal Engineering 30, 2010, pp. 2270-2280.
[8] Tovazhryanski, L., Kapustenko, P., Ulyev, L., Boldyryev, S., Arsenyeva, O., Process integration of sodium hypophosphite production, Applied Thermal Engineering 30, 2010, pp. 2306-2314.
[9] El-Halwagi, M. M., Process Integration, Vol 7, Elsevier, Oxford, UK, 2006.
[10] AspenTech Software User Guide, Aspen Plus 11.1, Aspen HYSYS 2006.5.
[11] Akgün N., Debottlenecking and Retrofitting by Pinch and Exergetic Analysis in a Chemical Plant, MSc Thesis, Ege University, Chemical Engineering Department, 2013.
Cite This Article
  • APA Style

    Nursen Akgun, Zehra Ozcelik. (2017). Debottlenecking and Retrofitting by Pinch Analysis in a Chemical Plant. American Journal of Energy Engineering, 5(5), 39-49. https://doi.org/10.11648/j.ajee.20170505.13

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    ACS Style

    Nursen Akgun; Zehra Ozcelik. Debottlenecking and Retrofitting by Pinch Analysis in a Chemical Plant. Am. J. Energy Eng. 2017, 5(5), 39-49. doi: 10.11648/j.ajee.20170505.13

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    AMA Style

    Nursen Akgun, Zehra Ozcelik. Debottlenecking and Retrofitting by Pinch Analysis in a Chemical Plant. Am J Energy Eng. 2017;5(5):39-49. doi: 10.11648/j.ajee.20170505.13

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  • @article{10.11648/j.ajee.20170505.13,
      author = {Nursen Akgun and Zehra Ozcelik},
      title = {Debottlenecking and Retrofitting by Pinch Analysis in a Chemical Plant},
      journal = {American Journal of Energy Engineering},
      volume = {5},
      number = {5},
      pages = {39-49},
      doi = {10.11648/j.ajee.20170505.13},
      url = {https://doi.org/10.11648/j.ajee.20170505.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajee.20170505.13},
      abstract = {Energy saving, global warming and greenhouse gas emissions have become major technological, social and political issues. Being closely related to energy supply, they are of a strategic significance. Today, especially energy-sensitive industries such as refining and petrochemical are targeting to recover maximum amount of energy by applying Process Integration (PI) that deals with the energy efficiency, waste minimization and effective use of raw materials. Pinch Analysis is a structured approach and a systematic tool of PI. The prime objective of Pinch Analysis is to achieve financial savings by better process heat integration and reduce the externally provided energy requirements by recovering the maximum amount of energy within the system. It is also employed to improve effluent quality, reduce emissions, increase product yield and improve the flexibility and safety of the process. Properly calculated pinch targets have economic implications such as reduction of operating cost and capital investment. This study deals with energy saving strategies in a real VCM (Vinyl-Chloride-Monomer) plant by applying pinch method. The prime objective of this work is to achieve financial savings by better process heat integration (maximizing process-to-process heat recovery and reducing the external utility loads). It examines the existing process and introduces two alternative retrofit cases. Targets for heat recovery and utilities have been calculated (taking ΔTmin=10°C). Existing process and alternative cases have been compared. According to Retrofit 1, energy recovery reaches up to 12.51% whereas utility reduction is 57.24%. Retrofit 2 states that the recovered energy is 10.45% while the utility reduction is 47.83%. The results obtained indicate that there is a remarkable improvement in energy recovery and utility saving.},
     year = {2017}
    }
    

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  • TY  - JOUR
    T1  - Debottlenecking and Retrofitting by Pinch Analysis in a Chemical Plant
    AU  - Nursen Akgun
    AU  - Zehra Ozcelik
    Y1  - 2017/12/11
    PY  - 2017
    N1  - https://doi.org/10.11648/j.ajee.20170505.13
    DO  - 10.11648/j.ajee.20170505.13
    T2  - American Journal of Energy Engineering
    JF  - American Journal of Energy Engineering
    JO  - American Journal of Energy Engineering
    SP  - 39
    EP  - 49
    PB  - Science Publishing Group
    SN  - 2329-163X
    UR  - https://doi.org/10.11648/j.ajee.20170505.13
    AB  - Energy saving, global warming and greenhouse gas emissions have become major technological, social and political issues. Being closely related to energy supply, they are of a strategic significance. Today, especially energy-sensitive industries such as refining and petrochemical are targeting to recover maximum amount of energy by applying Process Integration (PI) that deals with the energy efficiency, waste minimization and effective use of raw materials. Pinch Analysis is a structured approach and a systematic tool of PI. The prime objective of Pinch Analysis is to achieve financial savings by better process heat integration and reduce the externally provided energy requirements by recovering the maximum amount of energy within the system. It is also employed to improve effluent quality, reduce emissions, increase product yield and improve the flexibility and safety of the process. Properly calculated pinch targets have economic implications such as reduction of operating cost and capital investment. This study deals with energy saving strategies in a real VCM (Vinyl-Chloride-Monomer) plant by applying pinch method. The prime objective of this work is to achieve financial savings by better process heat integration (maximizing process-to-process heat recovery and reducing the external utility loads). It examines the existing process and introduces two alternative retrofit cases. Targets for heat recovery and utilities have been calculated (taking ΔTmin=10°C). Existing process and alternative cases have been compared. According to Retrofit 1, energy recovery reaches up to 12.51% whereas utility reduction is 57.24%. Retrofit 2 states that the recovered energy is 10.45% while the utility reduction is 47.83%. The results obtained indicate that there is a remarkable improvement in energy recovery and utility saving.
    VL  - 5
    IS  - 5
    ER  - 

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Author Information
  • Chemical Engineering Department, Ege University, ?zmir, Turkey

  • Chemical Engineering Department, Ege University, ?zmir, Turkey

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