Page 316 - Applied Process Design For Chemical And Petrochemical Plants Volume II

Packed Towers 305

The manufacturer’s key performance descriptions and
claims are: CWC7,24 psia
FRI TDP, 5 mm TUBES
1. Comparative tests at Fractionation Research, Inc.
NUTTER RiNGS
(FRI) [154] showed the No. 2 Nutter ringTM to have 1.50 1 A-82 2‘ PALL RINGS
.
e-
greater usable efficiency-capacity profile, with sub- + : D- 3.5” PALL RINGS P
LL
stantially lower pressure drop than is achieved with
slotted rings. Usable capacity is comparable to 3X-in.
Pall rings (see Figures 9-31A-C).
2. Ring form provides multiple circular crimped strips
to encourage liquid surface renewal.

I C6/C7. 24 ps i a t
60.00
FRI TDP, 5 mm TUBES

50.00:

2 -00
40-001 E C6/C7, 5 psia
I FRI TDP, 5 mm TUBES
a.:
+- . A- 12 NUTTER RINGS
30.00:
1 := PALL PALL RINGS RINGS
2”
3.5‘
I-
LL
\
0
20.co: cu
= 1.00 I P
z
f E)-----2‘ PALL RINGS I P d
D-3.5’
PALL RINGS

63.00F C6/C7, 5 psia
FRI TOP, 5 mm TUBES
Fs I FT/S (LWFT3P
Figure 9-31 B. Comparison of pressure drop for No. 2 Nutter RingsTM
and Pall ttngs in a CdC7 system at 24 psia and 5 psia using the FRI
tubed drip pan distributor. Data prepared and used by permission of
Nutter Engineering, Harsco Corp. and by speclal permission of Frac-
tionation Research, Inc.; all rights reserved.

3. Perforated central trough enhances lateral liquid
spreading and effectively wets the outside surface
facing vapor flow.
4. Heavily ribbed main element for a high strength-to-
weight ratio.
lO.0,. . . . . . . I _ _ . . . . . . . I..... ... 5. A pair of tapered slots and hoops provide maximum
.
.
0. j
.50
l’.’i.
2.00
0
’
F5, FT/S(LB/FT3)% randomness with minimal nesting.
6. Efficiency enhanced by item (2) above, and the No. 2
Figure 9-31A. Comparison of HETP for No. 2 Nutter RingsTM and Pall Nutter Ring is better than 2-in. Pall rings [ 155, 1571.
rings in a C$G system at 24 psia and 5 psia using the FRI tubed drip 7. Superior surface utilition in mas and heat transfer,
pan distributor. Data prepared and used by permission of Nutter
Engineering, Harsco Corp. and by special permission of Fractiona- allowing shorter packed bed heights. Turn-down per-
tion Research, Inc.; all rights reserved. formance is superior over 2-in. and 3%in. Pall rings.