Патент USA US3081088код для вставки
March l2, 1963 3,081,072 l.. B. BRAGG PACKING FOR VAPOR-LIQUID CONTACT APPARATUS 2 .Sheets-Sheet 1 Filed Dec. 1, 195e i 5 H-b /05 0000 000000 0000001». 00000000* 0 00 0 0 00000 00.0.0 '0'0 0,0 00 ‘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.