تحلیل و مدل‌سازی عملکرد دیگ بخار بازیافت حرارت با استفاده از سوخت‌های نوین (زیست‌توده) با رویکرد کاهش آلاینده‌ها

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه صنعتی شاهرود، دانشکده مهندسی مکانیک

2 دانشمده مهندسی مکانیک، دانشگاه صنعتی شاهرود

چکیده

در کار حاضر، عملکرد دیگ بخار بازیاب حرارت سه­ فشاره با گرمایش مجدد ازنظر توان سیکل، بازده و میزان آلایندگی آن در شرایط استفاده از سوخت گازی حاصل از زیست­­توده توسط عوامل اکسیداسیون اکسیژن، عامل هوا و همچنین بخار، به­ عنوان سوخت سیکل ترکیبی، بررسی شده­ اند. علاوه ­بر این، در شرایط استفاده از این سوخت پارامترهای طراحی آن، نظیر دمای پینچ فشاربالا تا فشارپایین، میزان بخار تولیدشده و فشار بخار مراحل فشاربالا تا فشارپایین دیگ بخار بازیاب و اختلاف دماهای بخار مافوق گرم تولیدشده با جریان گاز، با هدف کسب بیشینه توان و بازده سیکل، با استفاده از الگوریتم ژنتیک، بهینه­ سازی شده­ اند. مطابق نتایج، میزان توان و بازده بیشینه سیکل در استفاده از گاز تولیدی از زیست­­توده توسط عامل بخار نسبت­به عامل اکسیژن، به­ طور میانگین، 117 مگاوات و 24/3% افزایش را نشان می­ دهد. اما، میزان NOx موجود در گازهای حاصل از احتراق گاز تولیدی از زیست­­توده توسط عامل اکسیژن نسبت­ به عامل بخار 790 گرم بر ثانیه کاهش می­ یابد. درانتها نیز، مقایسه­ ای میان سوخت مشتق زباله و گاز طبیعی، ازنظر توان، بازده سیکل و میزان آلایندگی، صورت گرفته است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Analysis and modeling of heat recovery boiler with using of new fuels (biomass) with view point of pollution reduction

نویسندگان [English]

  • Mahmood Chahartaghi 1
  • Soroosh Kalati Hesari 2
1 Faculty of Mechanical Engineering, Shahrood University of Technology
2 Shahrood University of Technology
چکیده [English]

In this paper, the performance of a triple pressure heat recovery boiler with gaseous fuels from biomass is discussed in terms of power output, efficiency and pollutions at oxygen, air, and steam gasification processes. The main parameters to optimization of heat recovery boiler by using genetic algorithm method are water and steam mass flow rates, high to low pressure pinch points temperatures, and temperature difference between the superheat steam and gas flows. It was found that the use of steam gasification in comparison with oxygen gasification increases the power output and efficiency of cycle 117 MW and 3.24%, respectively. However, the NOx production in oxygen gasification process is 790 gr/s less than steam gasification. Also different types of biomasses are compared in terms of power generation, efficiency and emissions production with each othe.
In this paper, the performance of a triple pressure heat recovery boiler with gaseous fuels from biomass is discussed in terms of power output, efficiency and pollutions at oxygen, air, and steam gasification processes. The main parameters to optimization of heat recovery boiler by using genetic algorithm method are water and steam mass flow rates, high to low pressure pinch points temperatures, and temperature difference between the superheat steam and gas flows. It was found that the use of steam gasification in comparison with oxygen gasification increases the power output and efficiency of cycle 117 MW and 3.24%, respectively. However, the NOx production in oxygen gasification process is 790 gr/s less than steam gasification. Also different types of biomasses are compared in terms of power generation, efficiency and emissions production with each othe.
 
 
 

کلیدواژه‌ها [English]

  • Heat recovery boiler
  • Gasification
  • Biomass
  • Combustion pollutants

مراجع

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سابقه مقاله

  • تاریخ دریافت: 05 بهمن 1399
  • تاریخ بازنگری: 22 اردیبهشت 1400
  • تاریخ پذیرش: 04 خرداد 1400

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