Patrick Bernhagen - Amec Foster Wheeler
Many older delayed coker heaters are of single fired design and had been operating for many years without major issues, until certain operational changes were made whether it be feed changes, capacity creeps, heat optimization of preheat train, or emission requirements to name a few. This presentation will address some of the current design features that can be incorporated into the older designs to improve coker operations. Topics discussed include tube sizes and variation in diameters within a pass, Cold Oil Velocity upper and lower limits, steam and or condensate injection, on-line spalling, radiant box geometry, Lo NOx burners and the various varieties thereof. Some present and past solutions provided as case studies.