EP3112793A1 - Vorrichtung zur verteilung eines films, der auf einen plattentauscher fällt und erste und zweite verteilebenen umfasst - Google Patents

Vorrichtung zur verteilung eines films, der auf einen plattentauscher fällt und erste und zweite verteilebenen umfasst Download PDF

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Publication number
EP3112793A1
EP3112793A1 EP16176031.9A EP16176031A EP3112793A1 EP 3112793 A1 EP3112793 A1 EP 3112793A1 EP 16176031 A EP16176031 A EP 16176031A EP 3112793 A1 EP3112793 A1 EP 3112793A1
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EP
European Patent Office
Prior art keywords
fluid
openings
wall
distribution stage
overflow
Prior art date
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Granted
Application number
EP16176031.9A
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English (en)
French (fr)
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EP3112793B1 (de
Inventor
Guillaume MONTZIEUX
Philippe Bandelier
Philippe LANCEREAU
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Publication of EP3112793A1 publication Critical patent/EP3112793A1/de
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Publication of EP3112793B1 publication Critical patent/EP3112793B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F25/00—Component parts of trickle coolers
    • F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
    • F28F25/04—Distributing or accumulator troughs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
    • F28D3/04—Distributing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2245/00—Coatings; Surface treatments
    • F28F2245/02—Coatings; Surface treatments hydrophilic

Definitions

  • the present invention relates to the general field of plate heat exchangers, which are heat exchangers comprising a plurality of plates arranged in the form of millefeuilles and separated from each other by a fluid circulation space. More particularly, it relates to the field of fluid distribution by film falling on a plate heat exchanger.
  • the invention applies to various technical fields of industry, and finds for example applications in the chemical industry, the food industry, air conditioning and refrigeration, the pharmaceutical industry, among others. It can in particular be used for thermochemical reactors, for example for thermochemical storage purposes, or for drift film evaporators, also called falling film evaporators, in particular for the evapo technique.
  • thermochemical reactors for example for thermochemical storage purposes
  • drift film evaporators also called falling film evaporators
  • evapo technique used for example for the food industry or waste management, for example the treatment of effluents, this technique of increasing the concentration of dry matter of a solution by reducing the volume of water or solvent present in this one.
  • the invention proposes a fluid film dispensing device falling on at least one vertical plate of a vertical plate heat exchanger comprising first and second distribution stages, an assembly comprising such a distribution device and a heat exchanger. vertical plate heat, and a method of operating such a dispensing device.
  • Figures 1A and 1B represent respectively in a perspective view and in section along BB of the Figure 1A , the principle of liquid distribution by film falling on a plate of a plate heat exchanger.
  • the distributor 1 allows the formation of a film of liquid FL in contact with the vertical plate 2, on either side of it, falling according to the arrows F2, from a volume liquid L flowing to the plate 2 in contact with the distributor 1 according to the arrows F1.
  • the invention thus aims to at least partially remedy the needs mentioned above and the disadvantages relating to the achievements of the prior art.
  • the invention aims at providing an improved alternative solution of the principle of distribution of a film of fluid falling on a plate heat exchanger.
  • it aims to obtain a falling film of fluid that is uniformly distributed and as thin as possible from the entrance of the film falling on a plate or several parallel plates of the plate heat exchanger.
  • the invention thus aims to be able to distribute the fluid uniformly over the entire width of a plate and on all the plates of the exchanger.
  • the invention it may be possible to define a specific path of the fluid in the form of film falling on the plate heat exchanger, promoting a homogeneous distribution of the fluid and the thinness of the thickness of the falling film.
  • the dispensing device according to the invention may further comprise one or more of the following characteristics taken separately or in any possible technical combinations.
  • the first wall of the first upper distribution stage may advantageously comprise a plurality of first through openings regularly distributed on the first wall.
  • the first through openings may be distributed equidistantly.
  • the second wall of the second lower distribution stage may comprise a plurality of second through-openings distributed evenly over the first wall, in particular equidistantly, and a plurality of guide pieces distributed regularly, in particular equidistantly, in at least partial superposition to the second through openings.
  • transverse offset of the second through openings relative to the first through openings is preferably equal to half the distance separating transversely two first through openings adjacent.
  • the dispensing device and in particular its constituent elements, such as the first container, the plate and / or the second container described above, can be made in various ways, in particular by folding, welding, machining, drilling, electro-erosion and / or molding (sand, lost wax, shell, ...), in particular by injection molding (also called PIM for "Plastic Injection Molding" in English), among others.
  • injection molding also called PIM for "Plastic Injection Molding" in English
  • the first wall of the first upper distribution stage may comprise a plurality of first through openings in the form of through orifices of substantially circular shape.
  • the first wall of the first upper distribution stage may further comprise a plurality of first through-openings in the form of substantially longitudinal through-grooves.
  • the second wall of the second lower distribution stage may comprise a plurality of second through-openings in the form of through-grooves of substantially longitudinal shape.
  • the plate may comprise a plurality of third through openings in the form of through-grooves of substantially longitudinal shape.
  • first wall of the first upper distribution stage may be of planar shape, substantially perpendicular to the direction of flow of the fluid by gravity, so as to allow a flow of the fluid through the first through openings by generating pressure drop.
  • the first wall of the first upper distribution stage may comprise a plurality of first overflow portions between which are formed the first through openings, each first overflow portion having a bottom, in particular a hollow, intended to receive the fluid from means for supplying fluid to the device, this bottom being delimited at less in part by two overflow side walls, thereby each extending from the bottom toward the first adjacent through opening, so as to allow flow of the fluid from the overflow supply means beyond the side walls of the overflow through the first through openings.
  • Each side wall may have, at its end adjacent a first through opening, a flange extending substantially from the side wall in the flow direction by gravity of the fluid.
  • the presence of such a flange can make it possible to avoid any flow of fluid on the lower part of each first overflow portion, in other words under the overflow sidewalls.
  • the second wall of the second lower distribution stage may be of planar shape, substantially perpendicular to the direction of flow of the fluid by gravity, so as to allow a flow of the fluid through the second or through openings by generating loss of charge.
  • the guide piece (s) in fluid flow may be of planar shape, substantially perpendicular to the flow direction of the fluid by gravity, so as to allow flow of the fluid by generating pressure drop.
  • the one or more fluid flow guiding pieces may be in the form of one or more third overflow portions, each third overflow portion having a bottom for receiving the fluid from the first upper distribution stage. said bottom being defined at least in part by two overflow side walls, thereby each extending from the bottom in a direction opposite to the flow direction of the fluid by gravity, so as to allow flow of the fluid from the first upper stage overflow distribution beyond the overflow sidewalls.
  • the second wall of the second lower distribution stage may also comprise a plurality of second overflow portions between which are formed the second through openings, each second overflow portion having a bottom, in particular a hollow, for receiving the fluid. from the first upper distribution stage, this bottom being delimited at least in part by two overflow sidewalls, thus each extending from the bottom towards the second adjacent through opening, so as to allow a flow of fluid from the first upper stage of overflow distribution beyond the overflow sidewalls through the second through openings.
  • the dispensing device may also comprise fluid film thickness control elements falling on said at least one vertical plate configured to restrict the width of the traversing paths, formed on either side of said at least one vertical plate, for controlling the thickness of fluid film falling in contact with said at least one vertical plate, these thickness control elements being in particular secured to the second wall of the second lower distribution stage on the one hand and other each second through opening.
  • the fluid flow guiding part (s) may also be in the form of one or more pressure drop generation components, in particular made from a porous material or a woven fabric, comprising one or more fluid passage channels from the first upper distribution stage for its flow through pressure drops through the second through openings of the second lower distribution stage.
  • first wall of the first upper distribution stage, the second wall of the second lower distribution stage and / or the one or more flow guide parts may be at least partially covered with a wetting surface coating improving the spreading. fluid for a homogeneous distribution.
  • the second wall of the second lower distribution stage and / or the one or more flow guide members may have inverted V-shaped portions for controlling fluid trajectories from the first wall.
  • Each inverted V-shaped portion may in particular comprise an edge forming a vertex from which extend symmetrical inclined surfaces, in particular extended by rise portions for the overflow.
  • the assembly may also comprise means for supplying fluid to the dispensing device, in particular in the form of one or more fluid injection points.
  • the vertical plates of the heat exchanger may be at least partly covered with a wetting surface coating improving the spreading of the fluid for a homogeneous distribution, especially in their portion housed within a second through opening .
  • the dispensing device, the assembly and the method of operation according to the invention may comprise any of the features set forth in the description, taken alone or in any technically possible combination with other characteristics.
  • the figure 2 represents, in perspective, the two sets 10 according to the invention.
  • the figure 3 represents, in partial section, the two sets 10 of the figure 2
  • the figure 4 is a detail view according to V of the figure 3 .
  • the dispensing device 1 comprises a first upper distribution stage 3, for receiving a fluid from the fluid supply means A of the device 1.
  • These fluid supply means A are in particular under the shape of a plurality of injection points A above the dispensing device 1.
  • This first distribution stage 1 comprises a first wall 5, which is pierced with a plurality of first through openings 3a for the passage of the fluid by gravity and for the distribution of the fluid between the vertical plates 2 of the heat exchanger 11.
  • the dispensing device 1 also comprises a second lower distribution stage 4, which is superimposed below the first upper distribution stage 3, when considering the direction of flow F of the fluid by gravity.
  • This second distribution stage 4 makes it possible to receive the fluid having passed through the first through openings 3a of the first distribution stage 3.
  • the second distribution stage 4 comprises a second wall 6, which comprises a plurality of second through openings 4a which are offset transversely relative to the first through openings 3a. More specifically, this transverse offset of the second through openings 4a with respect to the first through openings 3a is equal to half the distance D1 (see the figure 4 ) transversely separating two first through openings 3a adjacent. Thus, each second through opening 4a is superimposed on the median zone between two first through openings 3a.
  • each second through-opening 4a makes it possible to house the upper portions of the vertical plates 2 in the middle. To do this, the largest transverse dimension e of each second through-opening 4a is greater than the largest transverse dimension DP of the vertical plate 2 intended to to be located in this second through opening 4a, as shown in FIG. figure 4 .
  • each second through opening 4a has two through paths C1, C2, formed on either side of the corresponding vertical plate 2, these through paths C1, C2 allowing the passage of FL fluid film falling by gravity from and other and in contact with the corresponding vertical plate 2.
  • the falling film thickness FL is defined by the width of each crossing path C1, C2, in other words by the distance between the inner periphery of the second through opening 4a and the outer periphery of the vertical plate 2.
  • the second lower distribution stage 4 further comprises a plurality of guide pieces 7a flowing fluid arriving at the second distribution stage 4 from the first distribution stage 3.
  • These guide pieces 7a are superimposed at least partially above the second through openings 4a, so that the fluid arriving from the first distribution stage 3, after contact on the top of the second wall 6, flows between the second wall 6 and the underside of the guide pieces 7a, so as to impose a certain thickness to the fluid, to finally flow in the form of fluid film FL ep thickness through the through paths C1, C2 in contact with the vertical plates 2.
  • each vertical plate 2 is fixed to a guide piece 7a, in particular at its center, through which it extends.
  • first through openings 3a of the first wall 5 of the first distribution stage 3 are distributed. regularly (evenly) on the first wall 5.
  • second through openings 4a of the second wall 6 of the second distribution stage 4 are evenly distributed (uniformly) on the second wall 6, and the guide pieces 7a are also distributed. regularly superimposed second through openings 4a.
  • each assembly 10 according to the invention comprising a distribution device 1 according to the invention falling film FL gravity can be stated in three successive steps described below.
  • a general supply of the dispensing device 1 in fluid is carried out through a plurality of injection points A.
  • the fluid is distributed at the first distribution stage 3 to distribute the fluid between each vertical plate 2 by means of the principle of the pressure drop and / or overflow principle described below.
  • the fluid coming from the first distribution stage 3 is distributed at the level of the second distribution stage 4 by means of a principle of pressure drop and / or of a principle of overflow and control of thickness ep of film.
  • this last step promotes homogenization of the distribution of FL fluid film over the width of the vertical plates 2 of the heat exchanger 11 thanks to the cooperation between the guide pieces 7a and the second through openings 4a.
  • it also promotes crushing of the fluid film FL on the width of the vertical plates 2 with a control of the ep thickness of the film.
  • FIG. 5 represents, in perspective, a distribution device 1 according to the invention of one of the two sets 10 of the figure 2
  • the figure 6 is an exploded view of the dispensing device 1 of the figure 5 .
  • the dispensing device 1 thus comprises a first container 12 provided with a bottom forming the first wall 5 comprising a plurality of first openings through 3a.
  • This first container 12 takes particularly the form of a first tray pierced with a plurality of first through openings 3a.
  • These first through openings 3a here take the form of pierced orifices of circular shape.
  • the dispensing device 1 also comprises a plate 13, superimposed under the bottom of the first container 12, and provided with a plurality of third through openings 8a spaced from each other by solid portions of plate thus forming the parts of guide 7a in fluid flow.
  • These third through-openings 8a here take the form of longitudinal grooves pierced in the plate 13.
  • the dispensing device 1 further comprises a second container 14 provided with a bottom, superimposed under the plate 13, forming the second wall 6 comprising a plurality of second through openings 4a.
  • This second container 14 takes particularly the form of a second tray pierced with a plurality of second through openings 4a.
  • These second through openings 4a here take the form of longitudinal grooves pierced in the second wall 6.
  • the first tray 12 is located in the second tray 14 in use of the dispensing device 1.
  • the first container 12 then forms the first distribution stage 3 of the dispensing device 1, while the assembly formed by the plate 13 and the second container 14 forms the second distribution stage 3 of the dispensing device 1.
  • figure 7 represents, in section, this first embodiment of the stages 3 and 4 of the dispensing device 1 according to the invention.
  • the Figures 8 and 9 represent, in their view, two examples of first wall 5 of the first distribution stage 3 of the dispensing device 1.
  • figure 10 is a sectional view according to VII-VII of the figure 7
  • the figure 11 is a view from above of the second wall 6 of the second distribution stage 4 of the distribution device 1.
  • the gravitational film dispensing device 1 may consist of a stack of trays and plates for generating pressure drop, calibrate the thickness of the film to distribute the film uniformly over the width of the vertical plates 2 of the heat exchanger 11.
  • the first wall 5 of the first distribution stage 3 is in this example of planar shape, substantially perpendicular to the flow direction F of the fluid by gravity, so as to allow flow of the fluid through the first through openings 3a by generating loss of charge.
  • the second wall 6 of the second distribution stage 4 is of planar shape, substantially perpendicular to the flow direction F of the fluid by gravity, so as to allow a flow of the fluid through the second through openings 4a by loss generation. charge.
  • the guiding pieces 7a in fluid flow are of planar shape, substantially perpendicular to the direction of flow F of the fluid by gravity, so as to also allow a flow of the fluid by generating pressure drop.
  • first wall 5 of the first distribution stage 3 may comprise first through openings 3a which take the form of through orifices of substantially circular shape.
  • first wall 5 of the first distribution stage 3 may comprise first through openings 3b which take the form of substantially longitudinal through-going grooves.
  • Each first through opening 3a or 3b has a larger transverse dimension a, that is to say a diameter a for a circular orifice 3a or a width a for a groove 3b, and a passage section Sa, as shown on FIG. the figures 7 , 8 and 9 .
  • the first wall 5, for example in sheet form, has a wall thickness b and the second wall 6, for example in sheet form, has a wall thickness d.
  • the second distribution stage 4 has a passage height c of the fluid between the second wall 6 and the guide pieces 7a, with a passage section Sc as shown in FIG. figure 10 .
  • each second through opening 4a has a larger transverse dimension e, in particular a width, with a passage section Se, as shown in FIG. figure 11 .
  • the distance between the first 3 and second 4 distribution stages can be chosen arbitrarily.
  • the second through openings 4a are in the form of through grooves of substantially longitudinal shape.
  • the plate 13 has third through openings 8a in the form of through-grooves of substantially longitudinal shape so as to define the guide pieces 7a.
  • the first through openings 3a or 3b of the first container 12 are preferably dimensioned in number and in diameter a, or width, so as to generate a sufficient pressure drop to ensure a height of fluid in the container 12 and ensure the distribution of the fluid on the entire first surface of the first wall 5.
  • the number of first through openings 3a or 3b is advantageously the largest possible to generate the greatest possible impact near the vertical plates 2 of the heat exchanger 11.
  • the thickness b of the first wall 5 is preferably dimensioned so as to support the weight of the fluid height.
  • the height c (or gap) for the fluid passage between the first container 12 and the plate 13 is preferably as narrow as possible to ensure the filling of the channel formed between a guide means 7a and the second wall portion 6 vis-à-vis this guide means 7a, as well as to control the thickness ep (see figure 4 ) of the film and increase the pressure drop to homogeneously distribute the falling fluid film FL, while preferably maintaining a good flatness and parallelism of the surfaces.
  • the height c is about 0.5 mm.
  • the thickness d of the second wall 6, in contact with the fluid can be chosen so as to promote the spreading of the film by virtue of the capillary forces present.
  • the width e (see figure 4 ) second through openings 4a is preferably the smallest possible to crush the thickness of the film and increase the pressure drop contributing to distribute the fluid uniformly, while keeping sufficient space for the passage of fluid to the vertical plates 2 through C1 and C2 traversing paths.
  • Figures 12, 13 and 14 illustrate the principle of overflow
  • Figures 15 and 16 illustrate the principle of film thickness control
  • Figures 17 and 18 illustrate the principle of the distribution by generation of pressure drop
  • Figure 19 illustrates the principle of wetting surface
  • Figures 20 to 22 illustrate the principle of distribution by control of fluid trajectories.
  • these different examples and distribution principles according to the invention can be combined together in whole or in part.
  • the figure 12 represents, in section, a second embodiment of the stages 3 and 4 of a dispensing device 1 according to the invention, according to the principle of overflow.
  • the second wall 6 of the second distribution stage 4 is of planar shape, substantially perpendicular to the direction of flow F of the fluid by gravity, and the guide pieces 7a in fluid flow. are of planar shape, substantially perpendicular to the direction of flow F of the fluid by gravity.
  • first wall 5 of the first distribution stage 3 comprises a plurality of first overflow portions 15, having a generally V-shape, between which the first through-openings 3b are formed, here in the form of grooves.
  • Each first overflow portion 15 comprises a recess 16 receiving the fluid coming from the fluid supply means A of the device 1.
  • This recess 16 is delimited by two overflow sidewalls 15a and 15b, which thus each extend from the recess 16 towards the first through opening 3b adjacent, so as to allow fluid flow overflow beyond the overflow sidewalls 15a and 15b through the first through openings 3b.
  • the overflow principle makes it possible to extend the distribution of the fluid with the aid of extended slots, thus constituting an improvement with respect to point jets for which the distribution of the fluid remains punctual.
  • the overflow principle thus described in the first distribution stage 3 of the device 1 promotes homogenization of the distribution and compactness of the dispensing device 1 by eliminating the fluid height constraint required to dispense the fluid.
  • each side wall 15a, 15b has, at its end adjacent a first through opening 3b, a flange 17 extending substantially from the side wall 15a, 15b in the direction of flow by gravity of the fluid.
  • the presence of such a rim 17 may make it possible to avoid any flow of fluid on the lower part of each first overflow portion 15, in other words under the overflow sidewalls 15a and 15b.
  • This principle of overflow can also be found at the second distribution stage 4 of the dispensing device 1 according to the invention.
  • Figures 13 and 14 represent, in section, respectively a third exemplary embodiment and a fourth embodiment of the first and second stages of a dispensing device 1 according to the invention.
  • the first wall 5 of the first distribution stage 3 is of planar shape, substantially perpendicular to the direction of flow F of the fluid by gravity.
  • the second wall 6 of the second distribution stage 4 comprises a plurality of second portions of overflow 20, forming overflow bowls, between which are formed the second through openings 4a.
  • each second overflow portion 20 comprises a bottom 21 receiving the fluid from the first distribution stage 3.
  • This bottom 21 is delimited by two overflow sidewalls 20a and 20b, which each extend from the bottom 21 towards the of the second through opening 4a adjacent, so as to allow a flow of the fluid from the first distribution stage 3 overflow beyond the overflow side walls 20a, 20b through the second through openings 4a.
  • each side wall 20a, 20b has at its end adjacent a second through-opening 4a, a flange 17 extending substantially from the side wall 20a, 20b in a direction transverse to the flow direction by gravity of the fluid.
  • guide pieces 7a in fluid flow are of planar shape, substantially perpendicular to the direction of flow F of the fluid by gravity.
  • the guiding pieces 7a in fluid flow are in the form of third overflow portions 18, in the form of cuvettes.
  • Each third overflow portion 18 comprises a bottom 19, receiving the fluid from the first distribution stage 3, this bottom 19 being delimited by two overflow sidewalls 18a and 18b, which each extend from the bottom 19 in the opposite direction to the flow direction F of the fluid by gravity, so as to allow a flow of the fluid from the first distribution stage 3 by overflow beyond the overflow side walls 18a, 18b.
  • first wall 5 of the first distribution stage 3 and the second wall 6 of the second distribution stage 4 are of planar shape, substantially perpendicular to the direction of flow F of the fluid by gravity.
  • the principle of overflow at the level of the second distribution stage 4, at the level of the second wall 6 and / or at the level of the guide pieces 7a, of a distribution device 1 according to the invention makes it possible to absorb the impact of throws or fluid distribution defects at the first distribution stage 3 in order to homogenize the fluid distribution.
  • FIGS. 15 and 16 represent, in cross-section, respectively a fifth exemplary embodiment and a sixth embodiment of the first 3 and second 4 stages of a dispensing device 1 according to the invention, intended to illustrate a principle of thickness control ep film FL fluid falling.
  • the first wall 5 of the first distribution stage 3, the second wall 6 of the second distribution stage 4 and the guide pieces 7a are of planar shape, substantially perpendicular to the flow direction F of the fluid by gravity.
  • the dispensing device 1 further comprises fluid film thickness control elements 22 FL falling on the vertical plates 2.
  • These thickness control elements 22 for example in the form of brackets in section, in bearing against the lower face of the second wall 6 for the fifth embodiment and bearing against the upper face of the second wall 6 for the sixth embodiment, are configured to restrict the width of the traversing paths C1 and C2, formed of on each side of each vertical plate 2, to control the thickness ep of fluid film FL falling in contact with the vertical plates 2.
  • these thickness control elements 22 are fixed to the second wall 6 of the second distribution stage 4 on either side of each second through opening 4a.
  • the control elements 22 may be in one piece with the second wall 6. They may also result from a thickening of the second wall 6, in particular in the form of a plate, close to vertical plates 2.
  • the principle of controlling the ep thickness of the falling FL fluid film is to control the ep thickness of the film so that it is as thin and uniform as possible. By reducing as much as possible the ep thickness of the film, this promotes the homogenization of the distribution of the film on the vertical plates 2 of the heat exchanger 11.
  • the thickness control elements 22 in the form of brackets allow also to avoid the flow of fluid between two adjacent vertical plates 2.
  • Figures 17 and 18 show, in section, respectively a seventh embodiment and an eighth embodiment of the first 3 and second 4 stages of a distribution device 1 according to the invention, intended to illustrate a principle of distribution by generating pressure drop through loss of charge generation components.
  • the first wall 5 of the first distribution stage 3 and the second wall 6 of the second distribution stage 4 are of planar shape, substantially perpendicular to the direction of flow F of the fluid by gravity.
  • the guide pieces 7a in fluid flow are in the form of pressure drop generation components, in particular made from a porous material or a woven fabric.
  • These pressure drop generation components 7a comprise fluid passage channels 23 from the first distribution stage 3 for its flow through the second through openings 4a of the second distribution stage 4.
  • these passage channels 23 are in section in the form of brackets partially conforming to the upper face of the second wall 6 and the side face of the second wall 6 located in each second through opening 4a.
  • these passage channels 23 are in section in the form of vertical channels formed along each vertical plate 2.
  • the principle of the distribution by generation of pressure drop thus consists in using the pressure drop generation components with each one or more passage sections formed by the passage channels 23 which are sufficiently small to have a sufficient fluid height to that the distribution of the film is homogeneous.
  • the pressure drop generation components may be of any type and comprise one or more passage channels 23 as described above, or may be made from a porous material and / or a woven fabric, for example. In the latter case, the pressure drop generation components may not comprise passage channels as described previously.
  • figure 19 represents, in section, a ninth embodiment of the first 3 and second 4 stages of a dispensing device 1 according to the invention, to illustrate a wetting surface distribution principle.
  • the first wall 5 of the first distribution stage 3, the second wall 6 of the second distribution stage 4 and the guide parts 7a are of planar shape, substantially perpendicular to the flow direction F of the fluid. gravity.
  • the upper face and the lateral faces located in the second through openings 4a of the second wall 6 of the second distribution stage 4, as well as the flowing guide pieces 7a are covered with a wetting surface coating 24 improving the spreading the fluid for a homogeneous distribution.
  • the vertical plates 2 of the heat exchanger 11 are also covered with such a wetting surface coating 24 in their part located in a second through opening 4a.
  • the principle of the wetting surface distribution thus makes it possible to structure the surface concerned, in particular by means of a surface treatment, such as sanding, etching, sintered metal, the use of a wetting material, the use of a component with a capillary structure, such as a grooved component, a wire mesh, among others. In this way, it improves the spreading of the fluid on the relevant surfaces in contact with the fluid for an optimal homogeneous distribution of the fluid.
  • figure 20 represents, in section, a tenth exemplary embodiment of the stages 3 and 4 of a distribution device 1 according to the invention, according to the principle of distribution by control of the trajectories of the fluid.
  • the second wall 6 of the second distribution stage 4 is of planar shape, substantially perpendicular to the direction of flow F of the fluid by gravity
  • the first wall 5 of the first distribution stage 3 is also of planar shape, substantially perpendicular to the flow direction F of the fluid by gravity.
  • the guide pieces 7a in fluid flow have a generally inverted V shape, as visible on the figure 20A described below, each being superimposed on a portion of the second wall 6 between two second through openings 4a consecutive.
  • the principle of distribution with control of the fluid trajectories is to promote a circulation of the compartmentalised fluid to reduce the random distributions and to force the flow trajectories.
  • each guide piece 7a forms a component that receives the impact of the fluid F from the first stage 3 and directs it homogeneously over the width of the plates.
  • a component thus compartmentalizes and directs the trajectories of the fluid. It no longer has a horizontal surface but is modified to form two symmetrical inclined surfaces to avoid a division of the flow to the second distribution stage 4 and thus avoid random distributions.
  • the figure 20A represents, in isolation and in perspective, an example of guide piece 7a used in the device of the figure 20 .
  • the guide piece 7a has an inverted V shape with an edge 30 at the top of which two inclined surfaces 31 extend, each extended by a substantially vertical portion 32 intended to be introduced at least partially into a second through opening 4a, in contact with the second wall 6.
  • the guide piece 7a has one or more shims 33, here three wedges 33, extending transversely along the inclined surfaces 31 and substantially vertical portions 32. These shims 33 serve to hold the guide piece 7a between the plates with homogeneous spacing over the width of the plates.
  • the figure 21 represents, in section, an eleventh embodiment of the stages 3 and 4 of a distribution device 1 according to the invention, according to the principle of distribution by control of the fluid trajectories.
  • the first wall 5 is similar to that of the example of the figure 20
  • the guide pieces 7a may be similar to those described with reference to the figure 12 .
  • each portion of the second wall 6, situated between two second through openings 4a, has an edge 30 at the top of which two inclined surfaces 31, here devoid of any extension, depart.
  • figure 22 represents, in section, a twelfth embodiment of the stages 3 and 4 of a distribution device 1 according to the invention, according to the principle of distribution by control of the fluid trajectories.
  • This example advantageously combines the principle of the distribution by control of the trajectories of the fluid with the overflow principle described above with reference to the Figures 12, 13 and 14 . In this way, it is possible to improve the spreading and homogeneous distribution of the fluid film FL over the width of the plate.
  • each portion of the second wall 6 here comprises inclined surfaces 31 each extending at their end by a rising portion for the overflow 34.
  • each inclined surface 31 defines, with its rising portion for the overflow 34 associated , an overflow bowl 35 in which the fluid accumulates after impact on the inclined surface 31 before flowing through a second through opening 4a.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP16176031.9A 2015-06-24 2016-06-23 Vorrichtung zur verteilung eines films, der auf einen plattentauscher fällt und erste und zweite verteilebenen umfasst Active EP3112793B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1555830A FR3038038B1 (fr) 2015-06-24 2015-06-24 Dispositif de distribution de film tombant sur un echangeur a plaques comprenant des premier et deuxieme etages de distribution

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EP3112793A1 true EP3112793A1 (de) 2017-01-04
EP3112793B1 EP3112793B1 (de) 2017-11-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111595180A (zh) * 2020-05-27 2020-08-28 中国石油大学(华东) 一种适用于flng的正弦波纹管型绕管式换热器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7015284B2 (ja) * 2018-09-28 2022-02-02 株式会社デンソー 水散布冷却装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB498715A (en) * 1936-12-18 1939-01-12 Rene Velut Improvements in and relating to liquid cooling devices
FR1042434A (fr) * 1951-09-27 1953-11-02 Perfectionnement aux réfrigérants d'eau
FR1043505A (fr) * 1951-10-05 1953-11-10 Anciens Etablissements R Velut Procédé et dispositif de répartition du débit d'un liquide sur des plaques verticales de ruissellement
JPH1163885A (ja) * 1997-08-21 1999-03-05 Ishikawajima Harima Heavy Ind Co Ltd 冷水塔
JP3040772B1 (ja) * 1998-06-29 2000-05-15 三菱重工業株式会社 冷却塔
WO2009016650A1 (en) 2007-08-02 2009-02-05 Spray Engineering Devices Limited Improved falling film heat exchanger
EP2098285A1 (de) 2008-02-29 2009-09-09 Corning Incorporated Verfahren und Vorrichtung für fallende Filmreaktoren mit integriertem Wärmeaustausch
WO2013035508A1 (ja) 2011-09-09 2013-03-14 三井海洋開発株式会社 流下液膜式熱交換器、吸収式冷凍機システム、及び船舶、洋上構造物、水中構造物

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB498715A (en) * 1936-12-18 1939-01-12 Rene Velut Improvements in and relating to liquid cooling devices
FR1042434A (fr) * 1951-09-27 1953-11-02 Perfectionnement aux réfrigérants d'eau
FR1043505A (fr) * 1951-10-05 1953-11-10 Anciens Etablissements R Velut Procédé et dispositif de répartition du débit d'un liquide sur des plaques verticales de ruissellement
JPH1163885A (ja) * 1997-08-21 1999-03-05 Ishikawajima Harima Heavy Ind Co Ltd 冷水塔
JP3040772B1 (ja) * 1998-06-29 2000-05-15 三菱重工業株式会社 冷却塔
WO2009016650A1 (en) 2007-08-02 2009-02-05 Spray Engineering Devices Limited Improved falling film heat exchanger
EP2098285A1 (de) 2008-02-29 2009-09-09 Corning Incorporated Verfahren und Vorrichtung für fallende Filmreaktoren mit integriertem Wärmeaustausch
WO2013035508A1 (ja) 2011-09-09 2013-03-14 三井海洋開発株式会社 流下液膜式熱交換器、吸収式冷凍機システム、及び船舶、洋上構造物、水中構造物

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111595180A (zh) * 2020-05-27 2020-08-28 中国石油大学(华东) 一种适用于flng的正弦波纹管型绕管式换热器

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FR3038038A1 (fr) 2016-12-30
EP3112793B1 (de) 2017-11-08
FR3038038B1 (fr) 2017-07-21

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