Flash Zone Calculations
Total Pressure at the Flash Zone
Estimate the overhead reflux drum pressure as 5 psig (this will be checked later by a
bubble point calculation at 100
F).
Give the overhead air condenser a pressure drop of 5 psi. This is a reasonable
pressure drop for this equipment and will be specified as such in the equipment data
0.98
0.96
0.94
0.92
0.90
0.88
0.86
0.84
0.82
100
200
Mid Boiling Point °F
300
400
500
600
700
0.66
0.68
0.70
0.72
0.74
SG@ 60 °F
0.76
0.78
0.80
Fig. 16 The SG curve for the example calculation
160
D.S.J. Jones
Total Pressure at the Flash Zone
Estimate the overhead reflux drum pressure as 5 psig (this will be checked later by a
bubble point calculation at 100
F).
Give the overhead air condenser a pressure drop of 5 psi. This is a reasonable
pressure drop for this equipment and will be specified as such in the equipment data
0.98
0.96
0.94
0.92
0.90
0.88
0.86
0.84
0.82
100
200
Mid Boiling Point °F
300
400
500
600
700
0.66
0.68
0.70
0.72
0.74
SG@ 60 °F
0.76
0.78
0.80
Fig. 16 The SG curve for the example calculation
160
D.S.J. Jones