Dears
In case of considering a common hydtrotreater for kerosene and diesel cuts in downstream of the crude atmospheric distillation unit, it is possible to have the below configurations in the crude atmospheric distillation unit:
1) A side stripper for draw-off of kerosene and diesel as one cut
2) One side stripper for kerosene cut and another side stripper for diesel product
Although In the first case, fixed cost (for example: lower tower height, only one side stripper, instrumentation, number of side stripper bottom pumps) is less than that for the second case, in the first case duty of charge heater and overhead condenser will be more than that in the second case (more operating cost comparing to second case) . In the second case there are two side strippers and two pump-arounds , therefore heat recovery in heat exchanger train is more than that in the first case .
I think in the first case, if heat recovery is kept the same as that in the second case, the tower diameter in the pump around section for the mixture of kerosene and diesel draw-off will increase dramatically.
It would be highly appreciated if you shared your technical points/experience with me.
Thanks in advance.