مقایسه روابط آستانه‌ای تشکیل رسوب هیدروکربنی در مبدل‌های پیشگرمکن برج‌های تقطیر

نوع مقاله : پژوهشی

نویسندگان

1 فارغ التحصیل کارشناسی، دانشکده مهندسی شیمی، نفت و گاز، دانشگاه شیراز، شیراز

2 محقق پسادکتری، دانشکده مهندسی شیمی، نفت و گاز، دانشگاه شیراز، شیراز

3 عضو هیئت علمی مهندسی شیمی، دانشکده مهندسی شیمی، نفت و گاز، دانشگاه شیراز، شیراز

چکیده

تشکیل رسوبات هیدروکربنی در مبدل‌های پیشگرمکن با انواع چالش‌های عملیاتی، زیست محیطی، ایمنی و اقتصادی همراه خواهد بود. پژوهش حاضر به مطالعه و مقایسه پارامتری معادلات آستانه‌ای تشکیل رسوبات می‌پردازد. برای این منظور، گستره وسیعی از داده‌های تشکیل رسوب هیدروکربنی شامل خصوصیات جریان و سیال نفتی، شرایط دمایی و مشخصات مبدل‌ها ناظر به قطر معادل از منابع مختلف جمع‌آوری گردید. براساس خطوط برازش شده روی داده‌های نرخ رسوب محاسباتی بر حسب مقادیر تجربی مشابه، معادلات پالی، ابرت و پانچال به ترتیب با شیب‌های 0/352، 0/108، و 0/022 بیشترین دقت را در پیش‌بینی نرخ رسوب دارند. همچنین براساس آنالیز حساسیت، موثرترین پارامترها بر پیش‌بینی نرخ تشکیل رسوب عدد رینولدز و دمای سطح مبدل هستند. در نهایت می‌توان گفت که بهترین معادله برای پیش‌بینی نرخ رسوبگذاری بر مبنای نزدیکی مقادیر محاسباتی و تجربی در مبدل‌های پیشگرمکن برج‌های تقطیر، معادله‌ی پالی با کمترین حساسیت نسبی متوسط برابر با 0/29 خواهد بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Comparison of Threshold Models of Hydrocarbon Fouling Formation in Preheaters of Distillation Columns

نویسندگان [English]

  • Mohammad Javad Barbastegan 1
  • Amir Hossein Nikoo 2
  • M. Reza Malayeri 3
1 Graduate, School of Chemical, Petroleum, and Gas Engineering, Shiraz University, Shiraz
2 Post-doctoral fellow, School of Chemical, Petroleum, and Gas Engineering, Shiraz University, Shiraz
3 Faculty member, School of Chemical, Petroleum, and Gas Engineering, Shiraz University, Shiraz
چکیده [English]

Hydrocarbon fouling of preheat exchangers causes several detrimental impacts on operation, environment, safety, as well as economy of oil refineries. To investigate threshold fouling models, a variety of hydrocarbon fouling data, such as temperature, oil flow, fluid properties, and geometries of such exchangers, has been gathered from the literature. The most accurate models for predicting the fouling rate are the Polley, Ebert, and Panchal models, with slopes of 0.352, 0.108, and 0.022, respectively, based on fitted curves on the computational fouling rates in terms of comparable experimental values. The sensitivity analysis indicates that the two factors that profoundly affect the fouling rate are the surface temperature and Reynolds number. Using the Polley's equation, the fouling rate in preheat exchangers may be predicted with the highest degree of accuracy, mean sensitivity analysis of 0.29, based on the consistency of calculated and experimental data.

کلیدواژه‌ها [English]

  • Crude Oil
  • Heat Exchanger
  • Hydrocarbon Fouling
  • Sensitivity Analysis
  • Threshold Equations

مراجع

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