Page 332 - Applied Process Design For Chemical And Petrochemical Plants Volume II

Packed Towers 321

- I I I:llll -
p- R*8CHIGRIlfS ' -
2.0 ti.
-

-
- -
d
I I I Illll
- d loo 100 500 1000
LIIMRILBP.N
G. c4S RATE, LWHRIISPFT) G, GAS RATE, LIIMRILBP.N G, WS RATE, LB./MR.MSWKI B, wI)R4TE, U.4mBaFfJ
RATE,
GAS
G,
Effective
B.
ama
for
interfacial
A. Effective interfacial area for B. Effective interfacial ama for C. Effective interfacial area for D. Effective interfacial area for
1
Raschig
rings.
-in.
0.5 in. Raschig rings. 1 -in. Raschig rings. 1.5-in. Raschig rings. 2.0-in. Raschig rings, using
estimated hold-ups.
I I I I I Ill
1.0 IN. 1.5 IN.
BERL SADDLES
I
J

d
I I I I I I I I I I I I Ill1
100 500 Kyx) Kx) SQO 1000
0. US PATE. LB/MR)ISOFTJ 4 04s m, LbmImFD 6 as Rpm. LB.Arn.)mFTJ
E. Effective interfacial area for F. Effective interfacial area for G. Effective interfacial area for
0.5-in. Bed saddles. 1.0-in. Bed saddles. 1.5411. Berl saddles, using
estimated hold-ups.
Figure 9-47. Effective interfacial areas for random ceramic tower packings. Note for gases or vapors other than air, use abscissa, G, as
W(pg,JO.075)O.*. Based on the data of Fellinger [27]. Used by permission of the American Institute of Chemical Engineers; A.LCh.€. Jour., Shul-
man, H. L, Ullrich, C. F., Proulx, A. Z., and Zimrnertnan, J. O., V. 1, No. 2, (1955) p. 253. All rights reserved.

PL = (1.81) (62.3) = 112.6 lb/ft3 po.2 = (17.0)0.2 = 1.762 cp at 90°F

- -
359 460 + 90) ( 14.7 ) (0.087) (112.6) (32.2)
pG'- 29 /460+60\ 14.7+2 = 0.087 lb/ft3 (0.923)2 (92) (0.305) (1.762)

L ''* = 0.01975, (abscissa) = 0.13411 (ordinate)
G Reading Figure 9-21D at the calculated ordinate and
abscissa, we obtain:
f a ) for 1-in. Intalox saddles = 92 (Table 9-26A)
[F,J (original value) (a) An indicated operating condition above the upper
loading limit
2 (b) A condition of high pressure drop, approximately
v2 = (&) 0.305 1.5 in./ft of packing height
=
(c) A situation too close to flooding, thus requiring a
gc - 32.2 (lb) (ft)/(lb) (set)* larger tower diameter