Fired Heater Convection Section Steam Generation Tube Failure (Understanding the impact of flow regime and high peak heat flux profiles)
- Type: Conference Presentation
- Conference Type: AIChE Spring Meeting and Global Congress on Process Safety
- Presentation Date: August 20, 2020
- Duration: 20 minutes
- Skill Level: Intermediate
- PDHs: 0.40
Further, CFD modeling was adopted to study the flue gas flow distribution between the heaters. A damper was installed in the flue gas duct of the heater to control the flue gas flow distribution. Thus, high peak heat flux and poor tube side flow regimes were identified as the major factors causing tube failures.
- The heaters were operating with circulation ratio in the range 7 to 9 and the peak heat flux in the tube failure region was also very high (25,000 â 50,000 Btu/hr-ft2).
- An unstable slug flow regime was predominating in the tube failure region of both the heaters.
This paper describes the scheme to overcome these issues and eradicate tube failures.
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