Page 369 - Applied Process Design For Chemical And Petrochemical Plants Volume II

558 Applied Process Design for Chemical and Petrochemical Plants

1 (e)
II
Y,---- - ----- ii
.06

Operating Line (IO% Agua)
(Cannot be produced at pressure of the
8% system,since it crosses the
Equilibrium Line before the desired
Concentration is reached.)
-
.05

L
0
-
0
>"
- .04 - I Curve for Adiabatic Conditions,
- iquid Temperatures.
0 Inlet Liquid at SOOF.
I
9
\
m From Curve B and Operating Line,
I
z No. Transfer Unifs , Nls6.3
- No. Theoretical Plates,= 5.75
a
z" .03- (Designated by Dotfed Steps)
e Isothermal Theoretical Plates
= Approx. I 112
II
>-
Gas Transfer Units
-1
I
- I
.02 1
/ yI/ i PEiseeting tine ,C Ldurva A
xiquiiidrium Curve for
Isothermal Tower at 90.F

1

//A fE /r /)11/21 Approx.'Unit Isothermal
J I
I
Isothermal Theoretical Step Lines
I
I I 1x1 I I I I I
Xz .02 .04 .06 .08 .I .I2 .I4 .I6 .I8 0
X = Ib. MOIS NH3 /Ib. Mol. He0
Figure 9-77. Equilibrlum curves for ammonia-water; an operating system for production of 8% aqua (by weight) at total pressure of 150 psig.