ارزیابی فنی- اقتصادی راهکارهای پیشنهادی اصلاح الگوی مصرف آب در نیروگاه طرشت

نوع مقاله : مقاله پژوهشی

نویسندگان

استادیار شیمی تجزیه، پژوهشگاه نیرو

چکیده

میانگین مصرف آب خام در نیروگاه طرشت بهمیزان 2800m3/day  چشم‌گیر است؛ از این رو ارائۀ راه‌کارهای اثربخش در راستای اصلاح الگوی مصرف و جلوگیری از اتلاف آب ضروری است. پس از بررسی­های فنی، راه‌کارهای مؤثر از قبیل بازچرخانی زهکش تمیز1 دمنده 2 دیگ‌بخار، زهکش شست‌وشوی صافی­های رزینی3، تصفیه و بازچرخانی دمنده برج­های خنک­کننده و غیره مطالعه شد. باتوجهبه حجم و کیفیت پساب تولیدی نیروگاه، راه‌کار بازچرخانی زهکش­های تمیز بهعنوان مؤثرترین روش انتخاب شد. در بین روش­های مختلف اجرایی راهکار بازچرخانی زهکش­های تمیز، دو روش استخر فواره­ای و مبدل حرارتی بهعنوان روش‌های مؤثرتر ازنظر فنی- اقتصادی بررسی شد. مطالعات اقتصادی نشان داد که برای تهیۀ تجهیزات و اجرای راهکار بازچرخانی  m3/h8 دمنده دیگ‌بخار، بهمیزان 1,070,000 هزار تومان برای روش استخر فواره­ای و1,425,630 هزار تومان برای روش مبدل حرارتی هزینه لازم است که روش استخر فواره­ای حدود 25% کمتر هزینه دارد. هم‌چنین بازگرداندن دمنده دیگ‌بخار (200m3/day ) به آب ورودی با روش فواره­ای (راندمان عملکردی 75%) منجربه کاهش 3/5% در مصرف آب و استفاده از روش مبدل حرارتی (راندمان عملکردی 95%) منجربه کاهش حدود 8/6% مصرف آب ورودی می‌شود. در کنار نتایج اقتصادی، مطالعات فنی نشان داد که روش استخر فواره­ای بهدلیل سادگی عمل، امکان حذف آهن و هیدرازین برتری‌های بیشتری از سایر روش­های بازچرخانی دمنده دیگ‌بخار دارد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Technical-Economic Evaluation of the Proposed Solutions to Modify the Pattern of Water Consumption in Tarasht Power Plant

نویسندگان [English]

  • M. Ghahraman Afshar
  • M. Esmaeilpour
  • Morteza Faghihi
Assistant Professor of Analytical Chemistry, Niroo Research Institute (NRI)
چکیده [English]

The average consumption of raw water in Tarasht power plant is 2800 m3/day, which is considerable, and therefore it is necessary to provide effective solutions in order to improve the consumption pattern and prevent water wastage. After technical investigations, effective solutions such as recirculation of clean drains of boilers, drains of resin filters backwash, purification and recirculation of cooling tower drains, etc. were studied. Considering the volume and quality of the produced effluent of the power plant, the solution of recirculating clean drains was chosen as the most effective method. Among the various implementation methods of clean drain recycling, two methods of fountain pool and heat exchanger were investigated as two more effective technical and economic methods. Economic studies showed that for the provision of equipment and the implementation of 8 m3/h recycling solution of boiler blowdown, it is necessary to spend 1,070,000,000 Tomans for the fountain pool method and 1,425,630,000 Tomans for the heat exchanger method, that the fountain pool method needs about 25% less cost. Also, recirculation of boiler sludge (200 m3/day) to the raw water with the fountain method (functional efficiency 75%) leads to a 5.3% reduction in water consumption and the use of the heat exchanger method (functional efficiency 95%) leads to a reduction of about 6.8% of input raw water. In addition to the economic results, technical studies showed that the fountain pool method has more advantages than other methods of recirculating boilers due to the simplicity of operation, the possibility of removing iron and hydrazine.

کلیدواژه‌ها [English]

  • Tarasht power Plant
  • Boiler Blowdown
  • Cooling Tower Blowdown
  • Optimization of Cooling Towers
  • Heat Exchanger
  • Fountain Pool
  • Technical-Economic Evaluation
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