Olefin cracking furnace, different design, radiant coil arrangement and their effects on production yield, coil outlet temperature(COT), residence time and product distribution

سال انتشار: 1398
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,279

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شناسه ملی سند علمی:

GERMANCONF03_240

تاریخ نمایه سازی: 12 شهریور 1399

چکیده مقاله:

Ethylene production is a cornerstone of the chemical process industry. Thermal cracking is one of the most important processes in the petrochemical industry converting a hydrocarbon feedstock into more valuable products such as ethylene and propylene, and it is an endothermic process that takes place in the cracking furnaces. A cracking furnace typically consists of a long, relatively narrow furnace (radiant firebox) containing a large number of coils (process tubes) suspended in the firebox and a large number of gas burners. The furnace coils are formed from the tubes by welding. The tubes used in thermal cracking furnaces in an ethylene manufacturing process are usually made of HP and HK grades of heat resistant stainless steel. These alloys exhibit excellent properties in terms of oxidation resistance, carburization resistance, high temperature creep and thermal expansion. These tubes are exposed to high temperature (approximately 1100 °C and internal pressure of about 1 bar). There are five major licensors of ethylene plants: KBR; Technip; Linde; Shaw, Stone & Webster; and Lummus. While ethylene production differs slightly by licensor, the overall process is fairly similar. New radiant coils have been developed to enhance heat transfer and increase furnace run length, selectivity or operating capacity. The objectives of this paper are to present the fundamentals of thermal cracking furnace, to introduce cracking furnace design and radiant coil alloys and their arrangement in different licensor to discuss their effects on production yield, coil outlet temperature(COT), residence time and product distribution.

نویسندگان

Mehdi yosefinejad,

Sharif university of technology, chemical engineering department, Tehran, Iran

Bahare Akbari,

Iran university of science and technology, chemical engineering department, Tehran, Iran

Keyvan Mokhtari

university of Tehran, chemical engineering department, Tehran, Iran

Shapour Taghipour,

Shiraz university of Technology, chemical engineering department, Shiraz, Iran

Mina Mirshkarpour,

Amirkabir university of Technology, chemical engineering department, Tehran, Iran

Elham Rashnavadi

Isfahan university of technology, chemical engineering department, Isfahan, Iran