How to know if drainage is enough or not before coke drum steaming?
Originally we set the drainage time to be 5 min.
We shorten the drainage time to 2 min. after years of experience.
But we do not know if it is all right or not.
Recently we encounter a VR carry over from coke drum, we believe that the root cause is water carried by the steam.
We want to know the typical drainage time in other refinery.
