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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Yamamoto, Toshiya Arii, Kazuaki Huhetaoli, Null Niimoto, Shinta Ohata, Mitsuru Tagawa, Tetsuya Minami, Fumiyoshi |
| Copyright Year | 2011 |
| Abstract | Coke drums undergo cyclic operations typically in the temperature range from room temperature to about 500°C (930°F). During quenching, the coke drum is inevitably subjected to a rapid drop in temperature because cooling water is injected directly into the coke drum through the bottom inlet nozzle. The temperature profile on the shell surface is uneven during quenching, and can vary in each cycle of the quenching operation. Such a complicated thermal profile induces large strains in the shell portion of the coke drum, and eventually causes damage like bulging and/or cracking. The authors have investigated the bulging behavior of the coke drum by the thermal elastic-plastic FE-analysis, considering the existence of the overmatch welds and uneven temperature field during quenching [1]. In this paper, a practical FE-analysis is developed to estimate the complex strain that leads to bulging under uneven temperature fields during quenching. The actual temperature and strain data during operation are collected by thermocouples and high temperature strain gauges. A thermal analysis model, including an evaluation of boiling heat transfer on the shell’s inner surface, is established to simulate the measured shell behavior of the coke drum. By utilizing this FE-analysis model, several parameters thought of as causal factors in bulging can be examined under the uneven temperature profile that is likely to occur during actual operation. This analytical approach can also provide effective technique for improvements in shell durability. |
| Sponsorship | Pressure Vessels and Piping Division |
| Starting Page | 563 |
| Ending Page | 572 |
| Page Count | 10 |
| File Format | |
| ISBN | 9780791844540 |
| DOI | 10.1115/PVP2011-57428 |
| Volume Number | Volume 4: Fluid-Structure Interaction |
| Conference Proceedings | ASME 2011 Pressure Vessels and Piping Conference |
| Language | English |
| Publisher Date | 2011-07-17 |
| Publisher Place | Baltimore, Maryland, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Water Cracking (materials) Cycles Temperature Cooling Coke Thermocouples Shells Durability Strain gages Temperature profiles High temperature Boiling Fracture (process) Welded joints Nozzles Quenching (metalworking) Finite element analysis Thermal analysis Damage Heat transfer |
| Content Type | Text |
| Resource Type | Article |
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