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RE: Tarball


The phenomenon of foam experienced during the first few minutes of switch the  drums, can be motivated by a drum usually too cold or accumulation of liquid in the bottom of the drum, because the temperature indicator is not increased during the warming  of the drum it seem to exist a plugging  on the bottom line that could allow the drum filled with liquid  (How long was the time for warming the drum ?).
Over the years and during my  first years of operation in these units, I note that the minimum time to ensure that residue  in order to converted into coke was between 7 to 8 hours of coking time, as long as the top temperature was above the drum 805 degrees F
Best Regards

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