Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
  • B01D47/14—Packed scrubbers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
  • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
  • B01D53/18—Absorbing units; Liquid distributors therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/30—Details relating to random packing elements
  • B01J2219/302—Basic shape of the elements
  • B01J2219/30223—Cylinder
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/30—Details relating to random packing elements
  • B01J2219/304—Composition or microstructure of the elements
  • B01J2219/30416—Ceramic
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/30—Details relating to random packing elements
  • B01J2219/304—Composition or microstructure of the elements
  • B01J2219/30466—Plastics
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
  • B01J2219/30—Details relating to random packing elements
  • B01J2219/318—Manufacturing aspects
  • B01J2219/3188—Extruding
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S261/00—Gas and liquid contact apparatus
  • Y10S261/72—Packing elements
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber
  • Y10T428/2973—Particular cross section

Definitions

• This invention relates to shaped packing elements and particularly dumped packing elements shaped from extrudable materials such as plastics and ceramic slurries.
• Such elements are used in reactors where liquids and gases are contacted so as to bring about a reaction, heat transfer, solution or dissolution operations by intimately contacting two flowing fluids. As a consequence they have shapes designed to maximize surface area while retaining dimensional stability such they do not collapse or become crushed during use.
• the environment in which the elements are required to operate is corrosive and/or at an elevated temperature, it is desirable to form the elements from a ceramic material.
• the present invention provides such a shaped packing element with excellent strength and surface area properties that is readily manufactured by a simple extrusion process.
• the present invention provides an extrudable packing element comprising a cylindrical body member with a consistent cross-section which comprises a plurality of chord members within the body member wherein each end of a chord member is contiguous with an end of another chord member, and a plurality of radial septa members extending from the axis of the cylinder to at least as far as the mid-point of a chord member.
• chord members are preferably of equal length since this leads to greater symmetry and uniformity in the dimensions of the through passages defined by the structures within the cylindrical body member.
• the element can have any suitable number of chord members from three, (essential if the "contiguous" condition is to be met) to preferably no more than eighteen. In general however a number from four to ten, and particularly six, is preferred. In the most preferred structure the six chord members are grouped in two subgroups of three, each subgroup forming an equilateral triangle with one triangle displaced by 60° around the circumference of the cylindrical body member from the other.
• the number of radial septa members is determined by the number of chord members and will be an equal number. Thus, for example, with the preferred six chord members there are also six radial septa members.
• additional reinforcing members are provided between the inner surface of the cylindrical body member and extending along a radius of the cylindrical body member to at least the point of intersection of two chord members. Typically the additional reinforcing members do not extend as far as the axis of the structure. As will be appreciated such positioning is only possible where the chords are in two or three groups with equal numbers, (three or four) , in each group and with the structures formed by the groups, (triangles, or squares) , overlapping and rotationally displaced around the axis of the cylindrical body member.
• the structures of the invention are very effective in that they provide a very large number of intersection points at which liquids flowing across the various surfaces meet and are obliged to mix and merge before again subdividing, thus promoting homogeneity.
• a further advantage lies in the mutual reinforcement of the members.
• a cylindrical body member without the internal structures would have a much reduced resistance to compressive forces.
• the chord members particularly the most preferred group of six, provides significant added internal strength and this is further enhanced by the radial septa members which further brace the chord members against deforming movements. Finally the added reinforcing members provide a final level of reinforcement- for the cylindrical body member.
• the various reinforcing members divide the internal volume of the cylindrical body member into roughly equal sub-divisions.
• the surface area is significantly increased and the degree of impedance to gas flow through the element is minimized and equalized such that each passage through the element has an equal gas flow.
• the cylindrical elements according to the invention are preferably provided with curved end surfaces to inhibit nesting of the elements when dumped into a tower.
• the curvature of each end surface can be the same or different, for example one end can be convex while the other is concave or both can be concave or both convex.
• the radius of curvature of each curved end is the same This configuration is particularly advantageous since, when the product is extruded and the extrudate is cut to form elements, a single arcuate cut forms a concave end on a first element and a convex end on a second element from which the second is thereby separated.
• the elements can be shaped by a molding process but they are preferably made by an extrusion process using a suitably designed die.
• the product of the extrusion is a long cylinder with the same internal structure throughout.
• a knife preferably with a curved blade, severs the long cylinder into elements of the desired length with curved ends if the curved blade is used; The elements are then fired in a kiln to produce the finished elements.
• Drawings Figure 1 is a cross-section normal to the axis of a preferred element according to the invention.
• Figure 2 illustrates four optional side views, (a, b, c and d) , of the element shown in Figure 1 with the ends given curved or irregular surfaces.
• a cylindrical body member, 1 is provided with six identical chord member, 2, arranged in two equilateral triangles, the apexes of one being displaced around the circumference of the body member by 60° from the apexes of the second.
• Radial septa members, 3, radiate from the axis to the midpoints of the chord members and reinforcing members, 4, connect the interior surface of the cylindrical body member with the intersections of the chord members.
• Figure 2 which shows a side view of the element illustrated in Figure 1, the configuration of the ends of the element are shown.
• the ends are respectively straight, (7 in (a) ) ; convex and concave curved, (5 and 6 respectively in (b) ) ; double convex, (5 in (c) ) ; and irregular, (8 in (d) ) .
• the elements according to the invention configured as illustrated in Figures 1 and 2b and fabricated from ceramic materials were evaluated for mass transfer efficiency, (k g a), packing factor; weight in pounds per cubic foot, (which indicates the relative weights of installations of the elements); and pieces per cubic foot. In each case the values were measured in terms of value by comparison with an industry standard, a 2" ceramic saddle sold by Norton Chemical Process Products Corporation under the registered trademark "Intalox" which was arbitrarily given the value "1.00".
• the other comparison basis was a 3" ceramic Intalox® saddle.
• the element according to the invention had a diameter of 4.25" and a wall thickness of from 0.25" (cylindrical body member) to 0.125", (radial septa).
• the axial length of the elements was 1.25".
• the pe.rformance pa:rameters of the three elements was as follows :
• the elements according to the invention are 14% more efficient than the 2" saddles and 60% more efficient than the 3" inch saddles. In addition fewer elements are used per cubic foot than the 2" saddles and about the same as with the 3" saddles and a lower pressure drop than for the 2" saddles.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Physics & Mathematics (AREA)
• Organic Chemistry (AREA)
• Thermal Sciences (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Analytical Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Physical Or Chemical Processes And Apparatus (AREA)
• Gasket Seals (AREA)
• Sealing Material Composition (AREA)
• Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
• Materials For Medical Uses (AREA)
• Solid-Sorbent Or Filter-Aiding Compositions (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)
• Prostheses (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=22570332

Family Applications (1)

Country Status (16)

Families Citing this family (27)

Citations (1)

Family Cites Families (9)

• 1998
  • 1998-09-22 US US09/158,931 patent/US6007915A/en not_active Expired - Lifetime
• 1999
  • 1999-08-18 AU AU55697/99A patent/AU755121B2/en not_active Ceased
  • 1999-08-18 CA CA002344874A patent/CA2344874C/en not_active Expired - Fee Related
  • 1999-08-18 RU RU2001107963/12A patent/RU2207902C2/ru not_active IP Right Cessation
  • 1999-08-18 WO PCT/US1999/018759 patent/WO2000017428A1/en not_active Ceased
  • 1999-08-18 KR KR10-2001-7003630A patent/KR100448750B1/ko not_active Expired - Fee Related
  • 1999-08-18 JP JP2000574323A patent/JP3542776B2/ja not_active Expired - Fee Related
  • 1999-08-18 BR BR9914041-1A patent/BR9914041A/pt active Search and Examination
  • 1999-08-27 DE DE19940887A patent/DE19940887A1/de not_active Ceased
  • 1999-09-08 SE SE9903173A patent/SE519681C2/sv not_active IP Right Cessation
  • 1999-09-09 TW TW088115554A patent/TW464528B/zh not_active IP Right Cessation
  • 1999-09-16 AT AT0158999A patent/AT411333B/de not_active IP Right Cessation
  • 1999-09-17 FR FR9911811A patent/FR2786410B1/fr not_active Expired - Fee Related
  • 1999-09-20 IT IT1999MI001942A patent/IT1313529B1/it active
  • 1999-09-22 GB GB9922454A patent/GB2341810B/en not_active Expired - Fee Related
• 2001
  • 2001-02-28 ZA ZA200101716A patent/ZA200101716B/en unknown

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