Thermal stress analysis of a damaged waste heat boiler

2018 International Conference on Material Strength and Applied Mechanics

材料科学;力学

Wu, Y.-H.^1 ; Hsiao, C.-C.^1 ; Chen, C.-H.^2

MCL, Industrial Technology Research Institute, Chutung, Hsinchu

31040, Taiwan^1

Energy Research Center, Taiwan University, Chutung, Hsinchu

31040, Taiwan^2

关键词: Basic designs;    Circumferential welds;    Crack extension;    Heat boilers;    Root cause;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/372/1/012025/pdf
DOI  :  10.1088/1757-899X/372/1/012025

来源: IOP

【 摘 要 】

Waste heat boilers are widely used in the petroleum refining industry to improve energy efficiency. However, improper design, operation or maintenance of these boilers may result in costly failures. Cracking was found repeatedly at the same location on a circumferential weld of a certain waste heat boiler in CPC refinery. Hence a special designed fixture was used to avoid crack extension. Root cause mainly due to improper arrangement of internal tubes and external piping was then mainly found by thermal stress analysis. Recommendations was proposed to shut down the boiler immediately and to rearrange the tubes and piping without changing basic design of the waste heat boiler.