تعیین رابطۀ حلقۀ کنترلی آنالیزور Tail Gas برای تنظیم هوای مورد نیاز واحد بازیافت گوگرد

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری مهندسی شیمی، دانشگاه تهران

2 استاد مهندسی شیمی، دانشگاه تهران

3 کارشناس ارشد مهندسی گاز، پالایشگاه گاز ایلام

چکیده

اندازه‌گیری ترکیبات گوگردی موجود در جریان Tail Gas واحد بازیافت گوگرد به‌منظور کنترل دقیق جریان هوای ورودی به کورۀ احتراق و افزایش راندمان امری ضروری است. در این تحقیق روابط لازم برای تنظیم جریان هوای ورودی کورۀ احتراق واحد بازیافت گوگرد پالایشگاه گاز ایلام با ترکیب دو حلقۀ کنترلی پیش‌خور و پس‌خور ارائه شده است. پس از شبیه‌سازی فرایند، با استفاده از شبکۀ عصبی MLP و برازش غیرخطی، شاخص مجهول K برای محاسبۀ هوای مورد نیاز آنالیزور Tail Gas تعیین شد. بدین منظور هوای مورد نیاز با دو خطTrim  و Main به‌سمت کورۀ احتراق ارسال می‌شود؛ به‌طوری‌که 5/92% از جریان هوا از خط Main عبور می‌کند. لازم به ذکر است که تنظیم جریان هوا در حلقۀ کنترلی پس‌خور در بازه 5+ تا 5-% از کل هوای مورد نیاز است. روابط ارائه‌شده در این تحقیق، در سایر واحدهای بازیافت گوگرد قابل استفاده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Determining the Tail Gas Analyzer Control Loop Equations for Required Air Flow Adjustment in Sulfur Recovery Unit

نویسندگان [English]

  • N. Raeisi Ardali 1
  • N. Mostoufi 2
  • M. Soleimani 3
1 Ph. D. Student of Chemical Engineering, University of Tehran
2 Professor of Chemical Engineering, University of Tehran
3 M. Sc. in Gas Process Engineering, Ilam Gas Treating Company
چکیده [English]

Measurement of sulfur compounds in the tail gas flow in the sulfur recovery unit is necessary in order to fine control the combustion furnace airflow and efficiency enhancement. In this research, required equations for calculation of air demand in feedforward and feedback control loops in the sulfur recovery unit of Ilam Gas Treating Plant are developed. First, the process was simulated. Then, using MLP neural network and nonlinear regression, K factor was determined for tail gas analyzer air demand calculation. Total required air is sent to the combustion furnace through two lines: trim and main, such that 92.5% of air is passed through the main line. Meanwhile, tail gas analyzer air demand is in the range of -5 to +5 % of the total required air. The presented equations in this research can be employed for other sulfur recovery units.

کلیدواژه‌ها [English]

  • Sulfur Recovery Unit
  • Process imulation
  • Artificial Neural Network
  • Tail Gas Analyzer
  • Hydrogen Sulfide

مراجع

 

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مهندسی شیمی ایران
دوره 22، شماره 126 - شماره پیاپی 126
فروردین و اردیبهشت 1402
صفحه 55-65

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