Home › Forums › Coking › Design and Reliability › Cokedrums, Structure, Inspection › Drums › Drums warm up › RE: Drums warm up (1st during start up)
I have heard this 1st drum warm up problem happening during start up, mainly in FW units.
During startup very light feed is circulated back to fractionator, while keeping 700 Deg.F Heater outlet by procedure, which increase vaporization; but, normal procedure for first drum warm-up, as said before, requires a good design for the coke condensate balance line, which typically is too small since it is designed for normal operating conditions. I have seem cokers almost closing SP3 as much as possible (restricted by miminum mechanical stop) and still getting very long warm-up times.
Has anybody tried different warm-up procedures (other than FWs) for first drum during start up?