Page 408 - APPLIED PROCESS DESIGN FOR CHEMICAL AND PETROCHEMICAL PLANTS, Volume 1, 3rd Edition

376 Applied Process Design for Chemical and Petrochemical Plants
.e
g 1.0 � ,.....
LC - i- �
g .9 I i--
..J .8 i-
Cl> _i..-- t..,.,-'
:i5 7
i• ,....,..... i.,.,,,,-
� .6 ......
"8l /
8 .5 �
g � ./
z /
II 3
�·o .3 .4 .5 .6 .7 .8 .9 1.0
Pounds per Hour of Non - Condensable Gases
Figure 6-28C. Non-condensable load factor.
By permission, Worthington Corp. Pounds per Hour of Total Mixture Handled

,

1.2
- \
....
0
u
if I.I \
.... i'\.
Cl>
.,, <,
.,,
::,
f 1.0
0. r---.. r-.....
e
0 r-, r--
Cl>
t; .9 -..... ..__ -
II --
LI..
60 80 100 120 140 160 180 200 220
Figure 6-280. Steam pressure factor. By per-
Nozzle Steam Pressure -:ti: Go. mission, Worthington Corp.

5
1.2 -------------- GPM cooling water required = W L/ (L'l t.., 500) (6-23)
where W, is the pounds of steam to condense and L is the
.... latent heat of vaporization, usually taken as 1000 BTU/lb
.......
Q) I.I t-----1----+--- �---1 for process applications and 950 BTU/lb for turbine
::, - exhaust steam [6, 12].
�
Suction Pressure
� 4.0 Hg. Abs �--,c:;;;..+---� Example 6-12: Temperatures at Barometric Condenser
11
c: 1.0
... on E:jector System
0
(.) A barometric condenser is to condense 8,500 pounds
.... per hour of steam at 3.5 in. Hg abs using 87°F water. The
Q)
� 0. 9 ..,_ __ ,,t1:;..__;�...L-----f----1 non-condensables are 43 pounds/hr. Note that the non-
(.)
condensables are less than one percent of the steam.
Steam temperature (steam tables)
0·8 so 70 80 90 100 at 3.5 in. Hg abs 120.6°F
Cooling Water Temperature,°F Terminal difference 5
Outlet water temperature
Figure 6-28E. Steam requirement correction for two-stage unit with from barometric l 15.6°F
barometric intercooling. By permission, Fondrk, V. V., Petroleum Inlet water temperature 85
Refiner, V. 37, No. 12, 1958 [3]. 'Nater temperature rise 30.6°F