بررسی و مروری بر افزایش مقیاس در برج‌های تقطیر دیوار میانی

نوع مقاله : مروری

نویسندگان

1 استاد مهندسی شیمی، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان

2 دانشجوی دکتری مهندسی شیمی، دانشکده مهندسی شهید نیکبخت، دانشگاه سیستان و بلوچستان، زاهدان

چکیده

ستون‌های تقطیر دیوار میانی یا  DWCیک فناوری جداسازی جدید در زمینة افزایش بهره‌وری است که باعث صرفه‌جویی در مصرف انرژی و سرمایه‌گذاری می‌شود. این نوع برج‌ها برای جداسازی ترکیبات سه‌جزئی و بیش‌تر، مانند هیدروکربن‌ها، الکل‌ها، آلدهید‌ها، کتون‌ها، استون‌ها و آمین‌ها کاربرد دارد. به‌علاوه این نوع ستون‌ها در فرآیند‌های تقطیر واکنشی، استخراج و آزئوتروپیک استفاده می‌شود. افزایش مقیاس، راه‌اندازی و بهره‌برداری موفق یک واحد تجاری، همچنین امکان‌پذیری، طراحی، بهینه‌سازی و کاهش ریسک مستلزم وجود پایلوت است. مرور و بررسی‌ انجام شده نشان داد که ستون‌های دیوار میانی در مقایسه با برج‌های سری، می‌توانند %20 در هزینه‌‎های سرمایه‌گذاری تجهیزات و %30 در انرژی صرفه‌جویی کنند. اغلب پایلوت‌های موردمطالعه دارای قطر بین 50 تا 700 میلی‌متر و حداکثر ارتفاع 12 متر هستند. مهم‌ترین نکات در طراحی و ساخت DWC تقسیم بخار، موقعیت دیوار، تعداد مراحل تعادلی، ارتفاع و قطر برج است.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation and Review of Scale up in Dividing Wall Distillation Column

نویسندگان [English]

  • Mortaza Zivdar 1
  • Rahbar Rahimi 1
  • mahmoud hemmati 2
1 Professor of Chemical Engineering, University of Sistan and Baluchestan, Zahedan, Iran
2 Ph.D. Student of Chemical Engineering, University of Sistan and Baluchestan, Zahedan, Iran
چکیده [English]

A dividing wall distillation column is a separation technology in the field of process intensification that promises energy and capital savings. Dividing wall columns are applied for separation of mixtures with three and more components, such as hydrocarbons, alcohols, aldehydes, ketones, acetones, and amines. Further, DWCs can be used to conduct azeotropic, extractive and reactive distillation. Scale-up and successful operation of a commercial unit, as well as design, optimization, feasibility and risk reduction in processes require a pilot. These studies indicate that DWC, compared to conventional distillation sequence, can save 20% in equipment investment costs and 30% savings in energy consumption. Most of the studied pilots were reported to have a diameter between 50 and 700 mm and a maximum height of 12 m. The most important points in the design and construction of DWC are vapor split, wall position, number of equilibrium stages, height and diameter of the tower.

کلیدواژه‌ها [English]

  • Dividing Wall Distillation Column
  • Scale-up
  • design
  • Optimization
  • Control
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