بهینه‌سازی برج تقطیر با استفاده از مفهوم انتگراسیون حرارتی داخلی و تحلیل اکسرژی

نوع مقاله : علمی ترویجی

نویسندگان

1 دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان

2 دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، گروه مهندسی شیمی

3 دانشگاه سیستان و بلوچستان

چکیده

اگرچه تقطیر یکی از پرمصرف‌ترین فرآیندها از لحاظ مصرف انرژی است اما جزء متداول‌ترین واحدهای صنعتی محسوب می‌شود. لذا صرفه‌جوئی انرژی در این بخش همواره مورد توجه محققان بوده است. در این مقاله روشی برای آنالیز ترمودینامیکی برج تقطیر بر مبنای انتگراسیون حرارتی داخلی با هدف بکاربردن جوش‌آور و خنک‌کننده جانبی ارائه گردیده است. در این روش از مفهوم اکسرژی به عنوان ملاک کیفیت انرژی و هم‌چنین به عنوان نیرو محرکه‌ی جدید جهت بهینه‌سازی بار حرارتی و مکان مبدل جانبی و بررسی میزان صرفه‌جویی انرژی استفاده شده است. نتایج شبیه سازی بر روی برج تقطیر دی‌بوتانایزر با استفاده از روش پیشنهادی نشان می-دهد که مشکلاتی نظیر تغییرات دمایی و خطاهای ایجاد شده در بار حرارتی که بعد از جایگزین شدن جوش‌آور و خنک‌کننده جانبی در روش‌های قبلی ایجاد می‌شد، وجود ندارد. هم‌چنین استفاده از این روش منجر به صرفه‌جویی قابل توجهی در انرژی مورد نیاز برج شده است.

کلیدواژه‌ها

عنوان مقاله [English]

Distillation Column Optimization by Using of Internal Heat Integration Concept and Exergy Analysis

نویسندگان [English]

  • Leila Izadi 1
  • Bahareh Bidar 2
  • Farhad Shahraki 3
2 Department of Chemical Engineering, University of Sistan and Baluchestan
3 University of Sistan and Baluchestan
چکیده [English]

Although distillation is one of the most energy consumer processes, it is common in industrial units. Therefore, saving of energy in that is attractive for researchers. In this work, a thermodynamic analysis based on internal heat integration for distillation column with the aim of applying inter–reboiler and inter–cooler is presented. In this method, the exergy concept is employed to judge the quality of energy as well as a new driving force in order to thermal load and side exchanger position optimization. Also, this method makes it possible to evaluate energy saving. The simulation results of Debutanizer distillation column by using of proposed method show that many problems i.e.: temperature changes and errors in thermal load after replacing inter–reboiler and inter–cooler that have already occurred, did not happen in this method. Furthermore, using of this method leads to significant savings in required energy of column.

کلیدواژه‌ها [English]

  • distillation
  • Optimization
  • Internal Heat Integration
  • Exergy
  • energy consumption

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