طراحی فرایند و تحلیل اقتصادی تولید توان از گازهای ارسالی به مشعل پالایشگاه گاز فازهای 22-24 پارس جنوبی

نوع مقاله : پژوهشی اصیل

نویسندگان

گروه مهندسی شیمی، دانشکده مهندسی شیمی و مواد، دانشگاه صنعتی شاهرود، شاهرود،ایران

چکیده
موضوع تحقیق: در صنایع نفت و گاز سالیانه میلیونها دلار سرمایه تجدیدناپذیر در مشعلها سوزانده می­شود که ضمن آلودگی هوا هیچگونه عایدی برای مجموعه ندارد. در کشور ایران و منطقه پارس جنوبی بدلیل وجود پالایشگاه­های گازی حجم قابل ملاحظه­ای از گاز در مشعلها سوزانده می­شود. این تحقیق در قالب مطالعه ای جامع به بررسی فنی و اقتصادی بازیابی گازهای فلر می پردازد.

روش تحقیق: برای این منظور از نرم افزار Aspen-Plus برای شبیه سازی واحد مورد نظر در مجموعه فلرهای فازهای 22 تا 24 پارس جنوبی استفاده شد. شبیه سازی از دو بخش تشکیل شده است: بازیابی گازهای ارسالی به فلر به کمک کمپرسور با حلقه مایع و تولید توان توسط گرمای ناشی از احتراق گازهای ارسالی به فلر از طریق اعمال چرخه رنکین بخار حرارت مجدد. سود آوری طرح شامل برشهای نفتا و گاز مایع بازیابی شده از گازهای ارسالی به فلر از یک سو و تولید توان در توربینها از سوی دیگر است.

نتایج اصلی: اثر میزان هوای ورودی به محفظه احتراق بر دمای گاز خروجی بررسی شد. میزان هوای ورودی به محفظه احتراق برابر 2685 تن در ساعت تعیین شد تا در چرخه رنکین بخار آب فوق بحرانی با دمای حدود 650 درجه سانتیگراد در فشار 26 کیلوپاسکال حاصل شود. با استفاده از نتایج شبیه سازی نمودار دما بر حسب آنتروپی ترسیم شده و علاوه بر نمودار فازی بخار در طول چرخه، منحنی چرخه رنکین بخار نیز ترسیم شد. نتایج این تحقیق نشان دادند که فرایند طراحی شده باعث تولید 5365 کیلوگرم بر ساعت نفتا، 45/179 کیلو گرم بر ساعت گاز مایع، 25903 کیلووات و 101124 کیلووات در دو توربین مجزا و درآمد فروش سالانه 24,782,194 دلار خواهد شد. علاوه بر آن نشان داده شد که دوره بازگشت سرمایه این فرایند برابر 5/2 ماه است.

کلیدواژه‌ها

موضوعات


عنوان مقاله English

Process Design and Economic Analysis of Power Generation from Flare Gases of South Pars Gas Refinery (phase 22-24)

نویسندگان English

Seyyed Hamid Esmaeili-Faraj
Alireza Arjomand
Department of Chemical Engineering, Faculty of Chemical and Materials Engineering, Shahrood University of Technology, Shahrood, Iran
چکیده English

Research subject: Millions of dollars of non-renewable capital are burned in flares every year, in the oil and gas industries, which in addition to polluting the air has no income for the industry. In Iran and South Pars region, due to the presence of gas refineries, a considerable amount of gas is burned in the flares. In this research, as a comprehensive study, the technical and economic investigation of the recovery of flare gases has been discussed.

Research approach: For this purpose, Aspen Plus software was used to simulate the desired unit in the set of flares of South Pars refinery phases 22-24. The simulation consists of two recovery parts: the flare gases recovery by use of a liquid ring compressor and power generation by the heat from the combustion of the flare gases through the application of the reheat steam Rankine cycle. The profitability of the project includes naphtha cuts and liquefied gas recovered from gases sent to the flare on one hand and power generation in turbines on the other hand.

Main results: The effect of the amount of air entering the combustion chamber on the temperature of the exhaust gas was investigated. The amount of air entering the combustion chamber was determined to be 2685 tons per hour in order to obtain supercritical water vapor with a temperature of about 650 ºC and a pressure of 26 kPa in the Rankine cycle. Using the simulation results, the temperature diagram was drawn in terms of entropy, and in addition to the steam phase diagram during the cycle, the steam Rankine cycle diagram was also drawn. The results of this research showed that the designed process will produce 5365 kg/h of naphtha, 179.45 kg/h of LPG, 25903 kW, and 101124 kW power in two separate turbines, and an annual sales income of 24,782,194 $. In addition, it was shown that the investment return period of this process is equal to 2.5 months.

کلیدواژه‌ها English

simulation
Flare Gas
energy recovery
South Pars Gas Refinery
Aspen Plus Software
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