Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
  • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
  • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
  • F25J3/04763—Start-up or control of the process; Details of the apparatus used
  • F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
  • F25J3/04896—Details of columns, e.g. internals, inlet/outlet devices
  • F25J3/04909—Structured packings
• • 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
  • B01J19/32—Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
  • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
  • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
  • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
  • F25J3/04763—Start-up or control of the process; Details of the apparatus used
• • 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
  • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
  • B01J2219/322—Basic shape of the elements
  • B01J2219/32203—Sheets
  • B01J2219/3221—Corrugated sheets
• • 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
  • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
  • B01J2219/322—Basic shape of the elements
  • B01J2219/32203—Sheets
  • B01J2219/32213—Plurality of essentially parallel sheets
  • B01J2219/32217—Plurality of essentially parallel sheets with sheets having corrugations which intersect at an angle of 90 degrees
• • 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
  • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
  • B01J2219/322—Basic shape of the elements
  • B01J2219/32203—Sheets
  • B01J2219/32224—Sheets characterised by the orientation of the sheet
  • B01J2219/32231—Horizontal orientation
• • 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
  • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
  • B01J2219/322—Basic shape of the elements
  • B01J2219/32203—Sheets
  • B01J2219/32255—Other details of the sheets
  • B01J2219/32258—Details relating to the extremities of the sheets, such as a change in corrugation geometry or sawtooth edges
• • 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
  • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
  • B01J2219/322—Basic shape of the elements
  • B01J2219/32286—Grids or lattices

Definitions

• the present invention relates to a packing module, of the type comprising a set of deflectors which define a set of horizontal layers of fixed circulation fans.
• packing is intended to mean a device intended for mixing a phase and / or for bringing several phases flowing in co-current or counter-current into contact.
• lining in particular, there may be an exchange of heat and / or material and / or a chemical reaction.
• a particular application of the invention resides in air distillation columns.
• the packing modules or "packs” of the aforementioned type are three-dimensional effect structures vis-à-vis the gas which rises in the column. They ensure, by multiple rotation of the gas, a high turbulence of this gas, and the resulting stirring improves the exchange of heat and / or material with the descending liquid.
• the structure comprises pyramids with open bases, and with alternately open and closed side faces, connected by their points so as to constitute a multitude of fan blades putting the gas in rotation to intensify the contact between the gas and the liquid.
• a particularly interesting characteristic of this structure is that it can be obtained by stacking perforated or cut and folded metal sheets having general vertical planes. The perforation allows the gas to pass through the stacked folded strips, the perforation rate being of the order of 50%. These perforations reduce the pressure drop and create fans promoting the mixing of gas.
• the object of the invention is to reduce, or even eliminate, this additional pressure drop and the premature congestion at the interfaces between the packs.
• the subject of the invention is a packing module of the aforementioned type, characterized in that, in at least one axial end zone of the module, the deflectors constitute transition deflectors defining at least one layer of fixed fans transition whose mixing effect is reduced compared to that of current fans of the layers located in the current part of the module.
• the subject of the invention is also a flat strip cut from sheet material, in particular from thin sheet metal, intended to be folded and / or curved, twisted or stamped, then juxtaposed with other similar strips with a general vertical plane turned over alternately to constitute a packing module as defined above.
• This strip of the type defining a plurality of horizontal rows of deflectors, is characterized in that, in at least one marginal zone of the strip, the deflectors have a configuration different from that of the current deflectors, defining said transition deflectors.
• the invention also relates to a method of manufacturing a packing module as defined above. According to this process, a series of cut out flat strips as defined above are folded and / or bent, twisted or stamped, so as to form an accordion structure, the strips are placed in parallel planes, turning them alternately, and they are stacked by aligning the corresponding deflectors to form the fans.
• the invention also relates to a fluid treatment device (s), characterized in that it comprises a plurality of packing modules as defined above.
• the modules can be offset angularly from one module to the next around the central axis of the device.
• This device can in particular be a column for exchanging material and / or heat, in particular a column for separating a mixture of gases, and in particular an air distillation column.
• FIG. 1 is a perspective view of part of a packing pack according to the invention
• FIG. 2 is a similar view of a variant
• FIG. 3 is a view of a cut out flat strip intended for producing the pack of FIG. 1,
• FIG. 4 is a view of the same strip after folding accordion.
• Figures 5 and 6 are views corresponding respectively to Figures 3 and 4 but relating to the variant of Figure 2.
• FIG. 1 There is shown in Figure 1 the lower part of a vertical section 1 of a packing pack 2 for an air distillation column not shown.
• Section 1 defines a superposition of fans, namely a current fan 3 surmounted by other identical fans not shown, and two transition fans, intermediate 4 and extreme 5, which are part of a lower end zone 6 of the pack .
• Fans 3 to 5 have a common vertical axis X-X.
• the fan 3 consists of four planar blades or deflectors 7, inclined at the same angle ⁇ on the horizontal.
• each blade has the shape of a diamond extended downwards by a triangular point 8, adjacent to a lower side of the rhombus, as described in the aforementioned EP-A-845,293.
• the fan 4 consists of four blades or deflectors 9 similar to the blades 7 but more inclined more horizontally, by an angle ⁇ greater than ⁇ . It is seen, seen along the axis XX, in the same perimeter as the fan 3, so that the vertical height of each blade 9 is greater than that of each blade 7.
• the upper tips of the blades 9 are each connected to a lower point of the rhombus of a corresponding blade 7 by a thin connecting zone 10.
• the fan 4 has a rotation effect, and therefore stirring, positive but less than that of the fan 3, and directed in the same direction, which is the direction anti-clockwise in the example shown.
• the fan 5 consists of four vertical blades or deflectors 11 of rectangular shape, with a horizontal lower edge 12 and an upper edge 13 hollowed out in V.
• the points of the V's are connected to the lower points of the respective blades 9 by a thin connecting zone 14.
• Section 1 is repeated a large number of times over the entire section of pack 2.
• the diameter of this section is typically between 1 and 4 cm.
• the pack 2 can be autonomous and provided with a cylindrical strapping optionally provided in its upper edge with several vertical slots to define a relative sealing brush adapted to cooperate with the inner wall of the column, as known per se.
• the pack can be produced by bricks assembled in situ, also as known per se.
• the pack 2 in all cases, therefore comprises at its base a layer without mixing effect consisting of fans 5, then an intermediate layer consisting of fans 4, with low mixing effect, then a plurality of layers of fans 3 common to strong brewing effect.
• the upper end zone of the pack is constituted by a transition zone identical to zone 6 but turned over.
• the other packs in the column are made in the same way.
• FIG. 2 represents a variant 2A of the pack in which the blades 7A and 9A are devoid of the lower tip such as 8.
• the increase in inclination of the blades 9A is obtained by folding these blades along a diagonal line 15 of orientation close to the horizontal.
• Each blade 9A thus comprises a triangular upper part 16 of inclination ⁇ and a triangular lower part 17 of inclination ⁇ greater than ⁇ .
• the lower fans 5A are identical to the fans 5 in FIG. 1, with four vertical blades 11A.
• the blades 9A can be at least partially curved to define the increased inclination of their lower part.
• Figure 3 shows a flat strip 18 of thin sheet metal intended for producing the pack 2 of Figure 1.
• This strip is cut or perforated so as not to keep only the blades 7, 9 and 11.
• the strip 18 is folded in an accordion around the lines 19, which leads, in front view, to the configuration of FIG. 4.
• the pack 2 consists of a plurality of bands 18 thus obtained, each arranged in a general vertical plane, turned alternately around a vertical axis and stacked with alignment and interpenetration of the blades so as to constitute the fans 3, 4 and 5
• the two blades located in the foreground belong to a first band 18 and those located in the second plane belong to a second band 18.
• Figures 5 and 6 show a strip 18A cut so as to keep only the blades 7A, 9A and 11A of Figure 2.
• the folding accordion is similar to the previous one, but with in addition, with each folding step along a broken line 19A, additional folding along the diagonal 15, initially horizontal, of the adjacent blade 9A.
• the upper and / or lower axial end zone of the progressive-stirring packs can comprise any suitable number of layers, and, in this zone, the intensity of the stirring can be varied either from one layer to next, from one group of layers to another group of layers.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Physical Or Chemical Processes And Apparatus (AREA)
• Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=8848240

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (6)

Family Cites Families (11)

• 2000
  • 2000-03-17 FR FR0003480A patent/FR2806325B1/fr not_active Expired - Fee Related
• 2001
  • 2001-03-15 AU AU2001248411A patent/AU2001248411A1/en not_active Abandoned
  • 2001-03-15 WO PCT/FR2001/000782 patent/WO2001068239A1/fr not_active Ceased
  • 2001-03-15 EP EP01921415A patent/EP1272269A1/de not_active Withdrawn
  • 2001-03-15 US US10/239,017 patent/US20030047820A1/en not_active Abandoned
  • 2001-03-15 CN CN01806476A patent/CN1418128A/zh active Pending

Non-Patent Citations (1)

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