In the last coker I worked, we only used steam to warm up an empty coke drum for start-up. While running, we would warm the empty drum with the hot vapors of the “coking” drum.
I’m guessing here, but your coker probably doesn’t have a “coke condensate drum”. This is where we would recover the hydrocarbon liquids from the drum being warmed. From this drum, we would then pump the liquids back to the fractionator, entering below the heavy coker gas oil draw pan and above the the sheds.