Coke formation in industrial furnaces

Publish Year: 1393
نوع سند: مقاله کنفرانسی
زبان: English
View: 1,232

This Paper With 11 Page And PDF Format Ready To Download

  • Certificate
  • من نویسنده این مقاله هستم

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این Paper:

شناسه ملی سند علمی:

KOUREH04_005

تاریخ نمایه سازی: 14 مرداد 1393

Abstract:

There are several thousand hydrocarbon furnaces located in world refineries and petrochemical plants. In general, these furnaces vary in size and style but each contains fired heating or reaction coils most often of a serpentine configuration commonly called furnace tubes, which transport the hydrocarbon charge stock being heated and processed. During normal operation a solid carbon material, commonly referred to as coke, is formed adjacent to the inner wall of the tubing. The formation, which is a result of continuous heating of the zero velocity fluid layers immediately adjacent to the fluid boundary, grows in thickness in a continuous manner with time. Eventually, removal of the coke deposits becomes necessary due to excessive pressure drop across the tubes, reduced throughput through the tubes, or reduction in thermal efficiency below some allowable minimum. Understanding the relationship between the oil film temperature, heat flux, bulk oil temperature, mass flux, and oil residence time allows the designer to choose cost-effective solutions to minimize the rate of coking. Several methods for internal cleaning or decoking of hydrocarbon furnace tubes are currently employed, the most common of which are mechanical cleaning, hydro blasting, and steam-air decoking. But by good operation like suitable reflux, increasing flow of fluid in the coils and minimizing flame impingement can prolong run lengths and increase the period time between decoking and increase reliability and safe operation of furnaces.

Authors

Haidar Jafari

Head of process operation of Bouali Sina petrochemical company

Ebrahim Jalali

Bouali sina Petrochemical Co, Mahshahre, Iran

مراجع و منابع این Paper:

لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :
  • Adams, B. R., "Computational evaluation of mechanisms affecting radiation in ...
  • Brown, D. J., Cremer, M. A., Smith, P. J., and ...
  • K.Vinayagam, Heating revamp& trouble shooting Inc. Chem. Eng. May 2007. ...
  • Bouali Sina petrochemical company, plant process description, AXENS Co. ...
  • نمایش کامل مراجع