Coking process
Thread Content
Our company’s residual oil process is: After 5 groups of heat exchangers → convection section of the heating furnace → bottom of the fractionation tower → radiant section of the heating furnace → coke tower. Although this can make full use of the heat of the fractionation tower and reduce the load of the heating furnace, many oil refining companies have changed the previous process into: After 5 groups of heat exchangers → convection section of the heating furnace → radiant section of the heating furnace → coke tower, what are the differences between these two processes and what are the advantages and disadvantages of each? Looking forward to your advice!
The first method was designed by the Beijing Institute before. As you said, it can make full use of the heat of the fractionation tower and reduce the load of the heating furnace. The second method is a design in recent years, represented by the Luoyang Institute, with flexible operation and adjustable circulation ratio.
I have not used the first process, so I would like to ask: Will the first process cause coking at the bottom of the tower or at the outlet of the convection section?
Learn about passing by* :victory:
I feel that the second process makes the best use of heat energy. . . * * Reduce the amount of coke at the bottom of the fractionation tower. Moreover, the cycle ratio is flexible, and the processing capacity can be adjusted according to the amount of raw materials. :loveliness: But my unit is a drawing of the first process. . . :'(
1. After passing through 5 groups of heat exchangers → convection section of the heating furnace → bottom of the fractionation tower → radiant section of the heating furnace → coke tower, this is an obsolete process. Fluctuations will cause fluctuations in the fractionation tower and the heating furnace at the same time, and* * Limit the amount of processing. 2. After 5 groups of heat exchangers → convection section of the heating furnace → radiant section of the heating furnace → coke tower, this improved process of Luoyang Institute is a single-pass operation with a circulation ratio close to 0.