Reformer tube life assessment(转化管寿命评估).pdf

Reformer Tube Life Assessment All rights reserved to Prepared by: Eitzaz Hussain ContentsContents Primary reformer introduction F‐2501 history Tube design parameters Tube damage  assessment Methods of tube life assessment Scope of LM Method Larson‐Miller Method An example of LM‐Method Uncertainties in LM‐Method Limitations of LM‐Method all rights reserved to thePetroStreet team PrimaryPrimary ReformerReformer Primary reformers are used to convert a “process gas” mixture of hydro carbons steam into hydrogen‐rich gases which can be used in the manufacture of ammonia. The process gas is passed under pressure through vertical tubes filled with catalyst and, since high temperature(900‐950 OC) is required to maintain the required chemical reaction, the outside of the tubes are heated byy burners in a largge furnace. HH OO ++ CHCH COCO ++ 44HH 2 4 2 2 all rights reserved to thePetroStreet team FF‐2501(History)2501(History) • Foster Wheeler designed Terrace type • Operated 19 years(1967‐1986) in Pascagoula (USA) • Mothballed for 5 years(1986‐1991) • Reconstructed with new radiant tubes, arch roof sealing, roof   wallwall refractoryrefractory, outletoutlet pigtailspigtails andand headerheader ((incoloyincoloy 800H)800H) all rights reserved to thePetroStreet team TubeTube DesignDesign ParametersParameters • Desiggn ppressure • QQuantityy 392 500 psig • Material Abex TX‐63 • Design temperature • O.D 4.7 inch 0 1780  F