Hello
dT from the drum vapor quenching is controlled a number of ways but is typically 20-50F. The dT after quenching to the fractionator inlet is typically quite small. The flow is 5-10% of the drum vapor to achieve that dT. You would need to back calculate that on a unit feed basis.
Some of the 5-10% quench oil is recovered as product and does not end up a recycle but some does. The exact amounts vary but 3-5% TPR can still be achieved with the quench values.
Any chance I can meet the coking committee? The coker road show is in Louisiana right now….http://coking.com/roadshow/