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Патент USA US3081088

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March l2, 1963
3,081,072
l.. B. BRAGG
PACKING FOR VAPOR-LIQUID CONTACT APPARATUS
2 .Sheets-Sheet 1
Filed Dec. 1, 195e
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‘MAMMA
ATTORNEY
March l12, 1963
3,081,072
L. B. BRAGG
PACKING FOR VAPOR-'LIQUID CONTACT APPARATUS
2 Sheets-Sheet 2
Filed Dec. 1. 1958
INVENTOR
’
¿Esc/E 5. 5R76@
“y
'
ATTORNEY
3,081,072
„
United States Patent C ” iCe
Patented Mar. 12, 1963
2
1
Referring to Vthe drawings more in detail:
The packing material of this invention is composed of
a grouping of elongated V-shaped units 10 which are
arranged to be fitted together to form a tray 11 extending
PACKING FOR VAPGR-LIQUID CONTACT
V
APPARATUS
across the entire internal cross-section of the column 12.
Leslie B. Bragg, Ridgewood, NJ., assignor to Packed 5 Successive trays 11 are assembled in stacked relationship
Column Corporation, New York, N.Y., a corporation
to provide a packed column such as is generally shown
of New York
‘
A
in FIG. 1.
Filed Dec. 1, 1958, Ser. No. 777,483
3,081,072
‘
1 Claim. (Cl. 261-106)
vi4-.?".
The elongated V-shaped units 10, the details of which
10 are shown in FIGURES 3_7, each consists >of a small
channel member 15 located at the point of the V, and
formed with a bottom wall 16 and substantially vertical
side w-alls 17. The sloping walls of 'the V-shaped units
are formed by individual panels 1K8 of foraminous ma
ticularly pertainsto an improvement of the type of pack
ing material described in the patent of R. C. Scofield, No. 15 terial, such as expanded metal, having openings of «a size
incapable of supporting a film of the liquid being proc
2,470,652 dated May 17, 1949, wherein each tray is com
essed, herein referred to as non-filming or non-capillary
posed of -a mat formed from a plurality of layers of
This invention relates to contact devices effecting con
tact between liquid and vapor or gas in fractionating
columns, absorbers, scrubbers and the like, and more par
foraminous material. Each panel 18 is provided at its
foraminous material, said mat. having spaced parallel
upper edge with a ñange 19 which is welded -or otherwise
ridges and valleys to form intermediate sloping areas
along which theliquid. flows and being fabricated to con 20 secured to the outer surface of -a vertical wall `17 of the
channel member 15. Along its lower edge each of the
for-n1 to the horizontal section of the column in which
' panels 18 is provided with a ven-tical iiange 20 which is
the mat is installed.
adapted to rest within the channel 15 of the tray below.
'Thepresent invention provides a packing material that
The ñanges 19 and 20 may comprise unexpanded metal
is made of small unit pieces which in the size for a four
inch high tray can be introduced into a column shell
through an opening as small as ten inch in diameter.
The packing trays are made of single sheets or layers.
As a result of imperfections of manufacture and un
c-ontrollable temperature stresses commercial column
shells are never truly round in cross-section and are sel
dom even of theexactly correct perimeter. Consequently,
the rigid construction of a unitary prefabricated tra-y does
not permit a satisfactory iit between t-he inner column
wall and the packing.
As a practical expedient it was necessary to construct
such trays somewhat smaller in diameter than the inside of
the column shell and then to fill the resulting annular'
or, if the entire panel 18 is formed from a sheet of ex
i panded metal, the areas of the flanges 19 and 20 may be
pressed to a vfiat state.
As shown in FIGS. l and 3-7 the lowermost member
11 is formed by a plurality of units 10 which are placed
side by side with their lowermost flanges 20 substantially
in contact and with the adjacent flanges ’2.0ï of successive
units 10 disposed in supporting channels 21. A series of
such channels 21 .are mounted on supporting members
22 for-ming a portion of a grid 23 which is secured in the
35 lowermost portion of the column 12. In the embodiment
space between the tray and the column shell with a pack- -
ing material such Ias stainless steel wool or rock wool.
lIihis resulted in a non-uniform structure inside the column 40
which permitted channeling of some liquid and possibly
shown four such units y10` are disposed across te column
and a portion of a fifth such unit is cut to lill in the space
at one side of the column so that the completed tray
extends >entirely across the cross-sectional area of the
column.
Similar trays 11 are stacked on the lowermost tray with
the. flanges 20 of the units 10 of -each tray resting in the
also vapor past the trays.
A feature of the present invention is the provision of
channels 15 of the tray below.
ln order to permit each unit 10 to be adjusted to a
a packing material which can readily be extended or con
tracted along the length of the serrations to allow for 45 length conforming exactly to the contour of the column,
each such unit is formed in two sections, 10a and 10b,
variations in diameter or out-of-roundness of the column
which are -overlapped as shown in FIGS. 3 and 4. A por
shell and also provision for iield trimming of the packing
tion of the channel 15 and of the flanges 19 and 2.0 of
sections when necessary during installation to further in
the section 10b is cut back so as to permit the section 10b
sure a close tit at all points between the packing sections
50 to nest closely on the surface of the section 10a, thereby
and the column wall.
forming in effect projecting flanges 18b on lche section
Another object of this invention is the provision of
10b which rest upon the outer surfaces of the panels 18a
an increased active cross-sectional area for the iiow of the
vapor or gas and thereby to provide for a greater allow
of the section 10a.
When the two sections 10a and 10b of the unit 10 are
able overall vapor or gas velocity.
55 installed in the tower they are adjusted in length and the
The invention will be better understood from the fol
ends are trimmed if necessary to confor-m to the contour
lowing description taken in connection with the accom
panying drawings `forming a part thereof, in which:
FIG. 1 is a schematic vertical sectional -view of part of a
of the tower at that zone.
'
The embodiment shown in FIG. 8 is similar to that
above -described except that the unit 10c of FIG. 8 is of
fractionating column having packing material arranged in 60
unitary construction and is made from a blank composed
accordance with the invention;
FIG. 2 is a horizontal section taken on the line 2-2
of FIG. l;
of a central portion 15e of unexpanded metal, areas 18al
of expanded metal, and side portions 20c of unexpanded
metal. The side portions 20c are bent downwardly to
FIG. 3 is a detail view partly in side elevation and partly
constitute the supporting flanges and -the central portion
in section showing the construction of a unit from which 65 15c is bent inwardly into a U-shaped section similar to
the tray is formed;
the channels 15 above described. In this embodiment
FIG. 4 is »a sectional view taken along -line 4-4 of
the expanded panels 18e are of somewhat greater area
than the panels `18. rllhe pervious section begins at the
FIG. 3.
`
FIGS. 5, 6 and 7 are sections taken on the lines 5-5,
rim of the channel 15e` and extends to the _lower ñarigf
70
6--6 and 7-7 respectively of FIG. 3; and
area 20c.
.
FIG. 8 is a transverse section through a unit illustrating
a further embodiment of the invention.
In operation, the liquid ñows ydownwardly along thi
3,081,072
adjacent panels. The vapor or gas flows upwardly through
the openings in the panels, bubbling through the liquid
in the pools above mentioned as it rises. The nature of
ported by said ‘bottom walls whereby the stacked trays
the flow and the shape of the packing promote repeated 5 form a rigid self-supporting structure which may be as
division and recombinations of both liquid and vapor-gas
sembled or disassembled by inserting said bottom ñanges
streams, thereby promoting uniform distribution of both
streams.
It should be understood that the invention while de
scribing primarily packing material made of expanded
10
tive supporting channel members, the adjacent panels of
contiguous- units forming a V-shaped trough for the re
ception of liquid which ñows downwardly along such
panels.
References Cited in the file of this patent
UNITEDV STATES PATENTS
terial may be used in the inverted position with the chan 15
nels opening downwardly.
The expression “vapor” as used herein and in the claim
includes “gas” within its scope.
Inasmuch as changes may be made in the form of the
packing disclosed and the material of which the packing 20
to be limited except by the scope of the appended claim.
What is claimed is:
25
A column packing for a vapor-liquid contact column,
833,686
Hart __. ______________ __ Oct. 16, 1906
1,296,028
1,516,187
1,741,495
1,888,181
2,047,444
Whittridge ____________ __ Mar. 4, 1919
Hanson ______________ __ Nov. 18, 1924
Barry _______________ __ Dec. 31, 1929
Riesbol ______________ __ Nov. 15, 1932
Stedman _____________ __ July 14, 1936
2,051,545
Collins ________ __' ____ __ Aug. 18, `1936
2,470,652
2,714,504
Scoñeld _____________ __ May 17, 1949
Bowles _______________ __ Aug. 2, 1955
2,878,761
Harder et al. _ ________ __ Mar. 24, 1959
2,884,236
Maille ______________ __ Apr. 28, 1959
23,546
503,125
510,204
697,363
729,587
Great Britain __________ __ Oct. 25, 1907
Belgium _____________ __ May 3l, 1951
Belgium _____________ __ Apr. 15, 1932
Great Britain ________ __ Sept. 23, 1953
Great Britain ________ __ May 11, 1955
FOREIGN PATENTS
30
adapted to seat in and be supported by corresponding
channel members of corresponding units of the adjacent
lower tray, said channel members having a width to hold
and maintain the vertical bottom ñanges of the units of
35
840,435
Germany ____ __- _______ __ June 9, 1952
855,675
France ______________ __ Feb. 19, 1940
OTHER REFERENCES
Spraypak~a New Column Packing Material, bulletin
of S. Blickman, Inc., Weehawken, NJ., Dec. l2, 1955.
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