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- Type of Document: M.Sc. Thesis
- Language: English
- Document No: 47453 (58)
- University: Sharif University of Technology, International Campus, Kish Island
- Department: Science and Engineering
- Advisor(s): Moosavi, Ali
- Abstract:
- Ethylene process is one of the most complex systems in petrochemical industries.The first section of the ethylene plant is the cracking furnace.The radiant section of predicted olefin furnaces is symmetrical with respect to a plane through the center line of the furnace and at an angle of 90° with the side walls. There are a total of 24 vertical radiant coils located centrally in the firebox wherein, bottom andside wall burners supply the heat necessary. Each four coils known as a ZONE so, as a result there are six zones, called zone A through F. Failures(rapture, creep, material degradation) rate on the coils decreases from zone A to zone F (A, B, C, D, E and F) respectively.From metallurgical point of view, the significant parametersinvolved for creating such conditions on the furnace are Stress and Temperature. Considering the point that stresses are similar in the furnaces and all are in design ranges. Although the furnace’s zones are similar physically and operatively, the temperatures differ in different zones. This truth is concluded from the experiments which were carried out on the innumerous furnaces. Using the numerical solution methodby commercial software (FLUENT), it will be found that the fuel gas distributions toward the burners in different zones do not affect heat non-uniformity and some other serious effects should be taken in consideration such as air register, burner improvement, fire box refractory investigation ,particle study and etc
- Keywords:
- Olefin ; Furnaces ; Flare ; Coil Effect ; Radiation Heating
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