Heat balance over the convection side is as follows:
Section 1
Pressure = 365 psia
V/L
F
API
lbs/h
Btu/lb
MMBtu/h
In
Feed
L
500
15
351,645
250
87.911
Heater duty
By diff
47.824
Total in
135.735
Out
Feed
L
700
15
351,645
386
135.735
Total out
135.735
40
2000
1800
1600
1400
1200
1000
800
600
Temperature °F
30
20
10
0
API Curve versus Mid V01%
0
2 0
4 0
% Volume Distilled and Mid Volume %
60
TBP Curve
80
100
API
Fig. 18 The TBP curve for the Sassan crude residue feed
Upgrading the Bottom of the Barrel
559