Page 272 - Applied Process Design For Chemical And Petrochemical Plants Volume II

T
i Figure 9-8E. Trough liquid distributor. Used by permission of U.S.
Stoneware Co. (now, Norton Chemical Process Products Corp.).

Width No of Flow
Plate Overoll Overall
of
‘Er !:; !:,, !;,; Lugs Weirs Per Ap~perpx.
II D II Minute) We’gh’.
24“’ 20” 23” 5%” 3” 8 16 55
30“ 2v 29 5%” 3” 18 36 70
36’ 30” 35“ 51%’’ 3” 18 36 120
42” 35,‘ 41 ’ 5%” 3” 36 72 150
48” 40“ 4w 5w 3” 40 80 190
60” 50” 58” 6’ $3 48 96 270
Figure 9-8F. Typical design inlet liquid distributor using holes (ori-
fices) on underside of distribution pipes. Note: Number of side pipes
adjusted to provide uniform entry per square foot of tower cross-
section area. Holes at wall should be spaced on same basis.

This distributor is widely used for
Koch/Sulzer” structured packing applications in
medium-to-large-diameter col-
umns. The header above the lateral
arrangement provides for cost-
effective sectionalized designs with-
out the need for gaskets. Elevated
holes in both the header and laterals
provide superb fouling resist0nce.h
a resultof multipledrip points‘[MDP).
a curtain of liquid falls perpendicular
to the top of the packing.
In a typical design, the header box
may have holes in the floor or, for
fouling services, holes in metering
boxes that are welded inside the
header The header is leveled inde-
pendently by lugs attached to the
laterals Laterals have holes
punched in the sides above the floor
of the lateral. The MDP baffle ar-
rangement directs the liquid onto
the packing with a typical lateral
hole densiw of 10 points/ftz Turn-
down capabilities. typically 2.5:l. A
two-stage design can be provided
for higher turndown requirements.
Overall distributor height is ap-
proximately 24‘: The distributor is
leveled from a supporting grid.
which normallyrestson thetopofthe
packed bed. The vessel manwoy is
usually located at or above the
header elevation.
*US Patent: 4,816.191
Canadian Patent 1.261.249
“See note
NOTE “SULZER” is the registered trademark of Sulzer Brothers Lid, Winterthur
Swrtrerland Koch EnaineerinaCornnanv lnc istheexclime licensee
CanadoandMexico
Figure 9-8G. Koch/Sulzet@ trough distributor (MDP), for medium to large diameter columns for structured packing (patented), one of several
designs available. Used by permission of Koch Engineering Co., Inc., Bull. KS-6.