EP0780654A1 - Einrichtung für Wärme- und/oder Stoffaustausch - Google Patents

Einrichtung für Wärme- und/oder Stoffaustausch Download PDF

Info

Publication number
EP0780654A1
EP0780654A1 EP96120289A EP96120289A EP0780654A1 EP 0780654 A1 EP0780654 A1 EP 0780654A1 EP 96120289 A EP96120289 A EP 96120289A EP 96120289 A EP96120289 A EP 96120289A EP 0780654 A1 EP0780654 A1 EP 0780654A1
Authority
EP
European Patent Office
Prior art keywords
plates
flat plates
heat
primary
perforated flat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP96120289A
Other languages
English (en)
French (fr)
Inventor
Paolo Giacometti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Italiana Per Il Gas P A Soc
Merloni Termosanitari SpA
Original Assignee
Italiana Per Il Gas P A Soc
Merloni Termosanitari SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Italiana Per Il Gas P A Soc, Merloni Termosanitari SpA filed Critical Italiana Per Il Gas P A Soc
Publication of EP0780654A1 publication Critical patent/EP0780654A1/de
Ceased legal-status Critical Current

Links

Images

Classifications

    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements
    • F28D9/0075—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements the plates having openings therein for circulation of the heat-exchange medium from one conduit to another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/086—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning having one or more openings therein forming tubular heat-exchange passages

Definitions

  • This invention refers to a device for heat and/or matter exchange between substances in a liquid, vapour or gaseous state.
  • Plate-type heat exchangers are already known.
  • a most diffused and consolidated version of said exchangers consists of metal plates packed together to define a certain number of parallel ducts.
  • Two fluids which may be called primary and secondary fluid, are flown through said ducts and thermal exchange takes place between the two, if the primary fluid flows in the ducts of even number then the secondary fluid will flow in the ducts of odd number, so that in each duct one of these two fluids can exchange heat with the other through the plates defining the duct itself.
  • Adequately shaped gaskets restrain each one of these two fluids in their relevant ducts and act as a spacer between a flat plate and its subsequent one.
  • Some of the plates mentioned above have holes located in appropriate positions, usually on their corners, through which the fluids to be distributed into the ducts flow, according to the known state of the art, the availability of holes or not, at least in some plates, allows a parallel arrangement of the ducts flown by the same fluid or to create paths consisting of packs of parallel ducts, connected in series between themselves.
  • the plates through which a thermal exchange takes place usually have a corrugated surface, since a set of parallel channels in a herring-bone pattern is obtained on them by drawing of the plates, the plates are packed together placing them one to the right and one overturned, and so on, so that the above channels on a plate intersect the ones of a subsequent plate; availability of said channels improves heat exchange, in dependence both from the actually increased exchange surface and above all from the increased turbulence of the fluids being forced to cover a sinuous path within the channels.
  • a further purpose of said channels is to allow a contact between two subsequent plates in evenly distributed small zones close to each other, so that likely pressure differences between the two fluids, even significant ones can be borne by the plates without deformations; thus, all efforts are discharged on two big end plates closing the plates pack, locked by tension rods.
  • a main advantage of plate-type heat exchangers is the opportunity of obtaining highly extended exchange surfaces in spite of small overall dimensions, and their extremely simple way to obtain various types of series-parallel paths, even most complex ones, simply alternating a few plate types in the exchanger composition according to an appropriate sequence.
  • Plate-type exchangers using rubber gaskets cause some inconveniences, such as a difficult fully automatic assembly and insufficient reliability when using toxic or corrosive fluids, specially under high pressure conditions.
  • a first object of this invention is to provide a device for heat and/or matter exchange, which can be executed using substantially flat modular elements obtained by simple mechanical processes.
  • a second object of this invention is to provide a device for heat and/or matter exchange, using a minimum selection of said modular elements, for use in a repetitive manner and different quantity according to each case, resulting in a extremely simple automatic assembly.
  • a third object of this invention is to provide a device for heat and/or matter exchange, which, in respect to the known devices of equal capacity, is more compact and has reduced dimensions.
  • a fourth object of this invention is to provide a device for heat and/or matter exchange where gravitational films can be formed in a simple low-cost manner.
  • Fig. 1 shows a generic separating flat plate between two subsequent ducts of a plate-type exchanger according to this invention. This plate, indicate as a whole with 1, shows:
  • Fig. 2 shows a generic perforated flat plate whose function is to space and support the plates shown in Fig. 2 as well as to distribute fluids and generate fluid turbulence.
  • said perforated plate indicated with 6 shows the same openings defined in Fig. 1, identified with the same references IP, US, UP and IS, which are defined by the through holes 7, 8, 9 and 10, respectively.
  • Plate 6 also has a through holes array indicated with 11, with holes arranged in a substantially even manner all over the surface. The through holes array 11 is adequately stopped near the through holes 7 and 9, whereas it intersects the through-holes 8 and 10.
  • Fig. 3 shows a perforated flat plate 6.R similar to the one of Fig. 2, but rotated the other way round by 180°; references IP, US, UP and IS identify the same openings as defined with reference to Fig. 1, which are now defined by the through holes 9, 10, 7 and 8, respectively due to the plate rotation. Moreover, also the already mentioned through holes array 11 is visible.
  • Fig. 4 shows assonometrically the packing criteria for the plates of Figs. 1, 2 and 3, in order to perform a generic portion of a plate-type exchanger according to this invention.
  • Said Fig. 4 shows the perforated flat plate 6 of Fig. 2, the perforated flat plate 6.R, of Fig. 3 and the separating flat plate 1 of Fig. 1.
  • Fig. 5 shows a front view of a generic portion of a heat and/or matter exchanger according to this invention; as it can be seen, a perforated flat plate 6 is shown overlapping a perforated flat plate 6.R, so that the through hole arrays 11 related to said plates 6 and 6.R can define the through paths, some of them indicated with 12.
  • the through paths 12 relate to a fluid coming from the opening IS and directed to opening US.
  • Fig. 6 shows more in detail some of the countless paths 12, which are defined by the through holes 11 of the perforated flat plates 6 and 6.R overlapping each other.
  • reference 11.A indicates one of the contact zones between the perforated flat plates 6 and 6.R
  • 11.B indicates one of the openings resulting from the staggered location of the through hole arrays 11 on the perforated flat plates 6 and 6.R.
  • the contact zones 11.A ensure a mechanical and thermal continuity for the plates 6 and 6.R, whereas the openings 11.B cause intercommunication between some empty spaces created by the through holes 11 within each perforated flat plate 6 and 6.R.
  • An embodiment of the device according to this invention in particular, has practically all empty spaces created by the holes 11 in the plates 6 and 6.R intercommunicating through the opening gaps 11.B.
  • the plates previously illustrated are packed together in such a way to define a certain number of parallel ducts.
  • Fig. 7 is a side view showing in a general section A - A of Fig. 5 the ducts sequence that can be obtained with an alternated composition consisting of a separating flat plate 1 of Fig. 1, a perforated flat plate 6 of Fig. 2, a perforated flat plate 6.R of Fig. 3, a further separating flat plate 1, and so on. Moreover, this figure also shows the through hole arrays 11 and the opening gaps 11.B.
  • Fig. 8 is similar to Fig. 7; however, in this instance the first and third ducts (from the left) are obtained each one of them using two perforated plates 6 and two perforated plates 6.R; Fig. 8 clarifies how each duct of the heat and/or matter exchanger device according to this invention may actually consist of an undetermined number of plates, which may even differ from a duct to another.
  • the device according to this invention whose components are shown in the Figs. 1 to 8, operates as described hereunder.
  • the perforated flat plate 6.R of Fig. 3 consists in practice of the perforated flat plate 6 of Fig. 2 rotated by 180° over its plane (i.e. around an axis perpendicular to the plate itself), locating the through holes 11 in said perforated flat plate 6 in an adequate asymmetric position to the plate centre and overlapping the perforated plates 6 and 6.R so that the axis of the holes defining the openings IP, US, UP and IS may be in line with each other, said through hole arrays 11 will overlap each other in a staggered pattern as shown in Fig. 5, obtaining the through gaps 11.B shown in Fig 6. Wide contact zones 11.A are maintained anyway between the two plates 6 and 6.R. Due to the contact zones 11.A, either peripheral or within the through hole arrays 11, the plates 6 and 6.R can be solidly joined together by gluing, braze-welding or other known techniques to obtain a mechanically strong and thermally conductive structure.
  • Assembly procedure can go on indefinitely as schematically shown in Fig. 4, alternating the perforated flat plates 6 and 6.R and placing two separating flat plates 1 of Fig. 1 both at the beginning and at the end of the pack formed by said perforated flat plates 6 and 6.R.
  • a fluid for instance the secondary fluid
  • said fluid cannot outflow outside nor mix with the primary fluid flowing through the openings IP and UP.
  • the separating flat plate 1 generally shown in Fig. 1 can also be considered as the most external plate of a heat exchanger, in this instance it is possible to clamp some mouthpieces (for instance like the mouthpieces indicated with 51 in Fig. 19) in line with the through holes 2, 3, 4 and 5.
  • a primary fluid can be introduced in the exchanger through the opening IP and expelled through the opening UP, similarly, a secondary fluid can be introduced through the opening IS and expelled through the opening US.
  • the perforated flat plates 6 and 6.R may have any thickness, even a very thin one, since only the outside dimensions of the device and the thickness of the same perforated flat plates can have practical restrictions; the same applies for the quantity of said plates in a single gap.
  • the separating flat plates 1 shall have a consistent thickness to withstand likely pressure differences between the two fluids where thermal exchange occurs and between them and the environment outside.
  • the perforated flat plates 6.R do not necessarily need to be obtained only through 180° rotation of the perforated flat plates 6; this represents in fact a considerable manufacturing advantage, however, to the purpose of the exchanger's operation the plate 6.R could be conformingly different (for instance due to the design of the through holes array 11 and/or for its thickness) of the perforated flat plate 6.
  • the through holes arrays 11 are designed as a function of the fluid flowing through them therefore, as a general rule, the ducts in one same exchanger wherein the primary fluid is flowing may consist of perforated flat plates 6 and 6.R, which differ for their design from the through holes array 11, and for their thickness and number from the corresponding perforated plates 6 and 6.R related to the secondary fluid.
  • the through holes array 11 can be of advantage to have the through holes array 11 provided with holes of different form and distributed in an uneven pattern.
  • Both the flat plates 1 and perforated flat plates 6 can be either metal or heat conductive ceramic material.
  • the ducts for primary and secondary fluids circulation can be sealed by braze-welding some plates 1 and 6 (if metal) or using sealants or elastomeric gaskets.
  • An optional procedure is to coat the plates surfaces, e.g. with polytetrafluorethylene, then seal them by sintering the material deposited on the plates.
  • the device according to this invention as described above with reference to Figs. 1-8 can be immediately applied as a heat exchanger between a primary fluid distributed in the primary chambers (odd number) through the openings IP and UP and a secondary fluid distributed in the secondary chambers (even number) through the openings IS and US. Heat exchange between the primary and the secondary fluids is obtained through the separating flat plates 1.
  • a heat and matter exchanger device of particular advantage according to this invention is also described with reference to Figs. 9-18.
  • a distiller and rectifying device for clarity's sake such a device will be described with reference to a distiller and rectifying device; on the other hand, as it will become apparent later, it is clear that the inventive idea can also be applied to other matter exchange devices (either with or without heat exchange).
  • Fig. 9 shows a generic end or separating flat plate, indicated with 13, of the compact distiller and rectifying device according to this invention, such a plate 13 showing:
  • Figs. 10 and 11 show some perforated flat plates 22 and 22.R, called rectify side" in the following, being used to form the ducts wherein a mixture to be distilled is flowing; as it will be seen, by packing two or more rectify side" flat plates 22 and 22.R we obtain the distillation and rectifying ducts wherein the mixture to be distilled and/or rectified is circulating, as it will be apparent from the following description.
  • the plate 22 of Fig. 10 shows the same openings already highlighted in fig. 9, indicated with the same letters IL, IR, UV, UR, IV, UE, UL and IE, defined by the through holes 23, 24, 25, 26, 27, 28, 29 and 30, respectively; moreover, also an even through-holes array 31 substantially spread over the whole surface of the plate 22 can be seen, the through holes array 31 is adequately interrupted near the through holes 24, 26, 28 and 30, whereas it intersects the through holes 23, 25, 27 and 29 (specifically concerning the through holes array 31 both holes 31.A and 31.B intersecting the through holes 23 are highlighted); finally, 32 indicates a boiling zone of the mixture to be distilled, 33 an adiabatic rectifying zone and 34 a refrigerating rectifying zone; the reason for such a denomination will become apparent later.
  • Fig. 11 shows with 22.R a rectify side" perforated flat plate similar to reference 22 in fig. 10, which is rotated by 180° in respect to the latter, the letters IL, IR, UV, UR, IV, UE, UL and IE identify the same openings already defined in fig. 10, which are now defined by through-holes 27, 28, 29, 30, 23, 24, 25 and 26, respectively due to plate rotation, also the through holes array 31 (whose holes 31.C and 31.D intersecting the opening 27 are particularly highlighted), as well as the above boiling zone 32, adiabatic rectifying zone 33 and refrigerating rectifying zone 34.
  • Figs. 12 and 13 show some exchanger side" perforated flat plates 35 and 35.R, which are used to form the ducts where the heating or cooling fluids for the mixture to be distilled are flowing, as it will be seen, the exchanger side" perforated plates 35 and 35.R are suitable elements to form the thermal exchange ducts by packing two or more specimen, wherein the fluids due to cause a partial boiling of the fluid mixture to be distilled or a partial vapour condensation of the mixture to be rectified are circulating.
  • the exchanger side" perforated flat plate 35 of Fig. 12 shows with the same letters IL, IR, UV, UR, IV, UE, UL and IE, the same openings as defined in fig. 10, delimited by the through holes 36, 37, 38, 39, 40, 41, 42 and 43, respectively; moreover, in line with the positions of the boiling zone 32, of the adiabatic rectifying zone 33 and of the refrigerating rectifying zone 34 identified in Figs. 10 and 11, three holes arrays are indicated, namely:
  • a perforated flat plate 33.R is represented similar to the one shown with 35 in Fig. 12, however rotated by 180° in respect to it, the letters IL, IR, UV, UR, IV, UE, UL and IE identify the same openings already defined in Fig. 9, which due to the plate rotation are defined in this case by the through holes 40, 41, 42, 43, 36, 37, 38 and 39, respectively.
  • the figure also shows the same holes arrays identified in fig. 12 and the breathing openings 47 as well.
  • Fig. 14 shows assonometrically the packing criteria related to the plates shown in Figs. 9, 10, 11, 12 and 13, to represent a generic portion of the distiller and rectifying device, comprising the ducts for circulating the mixture to be distilled and the ducts for circulating the mixture heating or cooling fluids.
  • FIG. 14 shows a rectify side" perforated flat plate 22, a rectify side" perforated flat plate 22.R, a separating flat plate 13, an exchanger side" perforated flat plate 35, an exchanger side” perforated flat plate 35.R plus a separating flat plate 13.
  • the usual openings IL, IR, UV, UR, IV, UE, UL and IE are shown in the same position for each said plate.
  • Fig. 15 shows a front view of a general portion of the distiller and rectifying device embodiment according to this invention, where a rectify side" perforated flat plate 22 overlapping a rectify side" perforated flat plate 22.R as well as the boiling zone 22, the adiabatic rectifying zone 33 and the refrigerating rectifying zone 34 can be seen; moreover, openings IL, IR, UV, UR, IV, UE, UL and IE are also indicated, whereas other elements whose identification is now clear have been omitted.
  • Fig. 16 shows an exchanger side" perforated flat plate 35 of Fig. 12, overlapping an exchanger side" perforated flat plate 35.R of Fig. 13, as well as
  • Fig. 17 shows according to a section along the axis A - A of fig. 15 a duct provided for circulating the fluid to be distilled and another duct for circulating the heating or cooling fluids;
  • Fig. 17.A represents an enlarged detail of fig. 17.
  • Fig. 17 also shows the distiller duct 48 with the boiling zone 32 of the mixture to be distilled, the adiabatic rectifying zone 33, the refrigerating rectifying zone 34; viceversa, the thermal exchange duct 49 shows the heating fluid through-holes array 44, the neutral holes array 45 and the refrigerating fluid through-holes 46.
  • Fig. 18 shows assonometrically a possible embodiment of a compact distiller and rectifying device according to this invention, which is indicated with 50.
  • Said device 50 comprises an undefined number of distiller ducts in alternate sequence to an equal number of thermal exchange ducts, which are divided by separating plates as previously described;
  • Fig. 18 also shows the repeatedly cited openings IL, IR, UV, UR, IV, UE, UL and IE, defined by the mouthpieces 51; the arrows 52 show either the inlet or outlet flows of said mouthpieces 51.
  • rectify side perforated flat plates 22 and 22.R shown in Figs. 10 and 11 are the suitable elements, packed to two or more specimens, to form both the distiller and rectifying ducts 48 of Fig. 17 where the mixture to be distilled and/or rectified will be circulated
  • exchanger side" perforated plates 35 and 35.R shown in fig. 12 and 13 are the right elements packed to two or more specimen to form the thermal exchange ducts 49 of fig. 17 where the fluids causing a partial boiling of the liquid mixture to be distilled or a partial vapour condensation of the mixture to be rectified or both said fluids will be circulated, with no possibility for them to reach a mutual thermal or material contact.
  • the distiller and rectifying ducts 48 and thermal exchange ducts 49 are divided by the separating flat plates 13 of Fig. 9; either the former or the latter or both the separating flat plates 13 can be provided with the mouthpieces 51 of Fig. 18.
  • Each device unless otherwise stated, consists of an undefined number of distiller and rectifying ducts 48 in alternate sequence with thermal exchange ducts 49, as described above.
  • the device appears to be split from bottom to top in three zones as follows :
  • Boiling and partial vaporization of the fluid mixture expelled from IL occur In the boiling zones 32 of Fig. 15 through heating fluid circulation in the heating fluid through-holes array 44 of Fig. 16; as a result, the fluid residue depleted of its more volatile substance is expelled out of the opening UL, while the vaporized portion raises to the adiabatic rectifying zone 33 to meet in counterflow the rich liquid mixture entering the opening IL.
  • the liquid mixture from IL drips by gravity alone through a very uneven path formed by the set of through gaps (11.B, Fig. 7), being interrupted by the contact zones (11.A, Fig. 6) and also hindered by the vapour generated from boiling; therefore, if the rectify side" perforated flat plates 22 and 22.R are adequately designed, the descent can be slow enough to let a sufficiently leaned out mixture reach the opening UL.
  • Both the distilling and rectifying ducts 48 can be wide enough and with a sufficient number of rectify side" perforated flat plates 22 and 22.R to hinder the fluid mixture from the opening IL to flood said ducts, but causing it to flow along the surfaces of said rectify side" perforated flat plates 22 and 22.R.
  • the likely trend of said rich liquid mixture to collect in streamlets instead of wetting said surfaces is continuously opposed as said downflowing mixture is forced all the time to change its path in line with the contact zones 11.A and the through gaps 11.B.
  • the downflowing fluid will be pre-heated taking heat from the upflowing vapour, changing balance concentrations of the substances in the mixtures.
  • the liquid mixture will heat up and release some of its more volatile matter to vapour, whereas the vapour will cool down and release some of its less volatile matter to the fluid.
  • the ducts of thermal exchange 49 have neutral hole arrays 45, which are not flown by any fluid, whose purpose is to ensure a structural continuity to the whole device.
  • Said neutral hole arrays 45 are connected outside through breathing holes 47, which are adequate to avoid pressure increases or evacuate the gases eventually forming during the device welding stage.
  • vapour When the vapour overcomes opening IL it enters the refrigerating rectifying zone 34, where a further vapour cooling occurs through a cooler fluid circulating in the thermal exchange duct 49; following this last vapour cooling, a nearly total condensation of the less volatile residues is distiller available in the vapour, whereas the more volatile substance, practically pure, is expelled out of the opening UV; purification process is easy since also in this refrigerating rectifying zone 34 the downflowing condensate is forced to intimate contact with the rising vapour for the same reasons as for the adiabatic rectifying zone 33. Moreover, path uneveness will capture likely condensate droplets entrained by the vapour.
  • the distilling and rectifying ducts 48 should be wide enough to avoid flooding of the rich liquid mixture expelled out of the opening IL. Taking this need into account, if the openings IL were intersected by the through holes array 31 both in the upper and lower sections of its perimeter, it would be possible for all the rich fluid mixture from outside the distiller and rectifying device to be drained by the initial distilling and rectifying ducts 48 it meets and flood them, whereas the subsequent ones would not be fed, for this reason and with reference to the Figs.
  • the through holes array 31 it is appropriate for the through holes array 31 to intersect the opening IL only in line with the holes 31.A, 31.B, 31.C and 31.D, which are all located in line with the perimeter upper half of the opening IL.
  • the rich fluid mixture distributed by the opening IL shall flood the lower half of said opening IL before flowing down to the distilling and rectifying duct 48 and overflow said opening IL all over its length, without being able to feed preferentially the initially met distilling and rectifying ducts 48 .
  • the opening IV is not used during the above distiller and rectifying process. Actually, it can be used in special instances where the process does not only require a relatively cold and extremely pure vapour out of the more volatile substance, but also requires warmer vapour easier to condense at low pressure, or anyway a relatively not very rich vapour. In this instance, said vapour can be tapped off the opening IV directly from the boiling zones 32.
  • the rectify side" perforated flat plates 22 and 22.R may also not be made with a material with a special thermal conductivity or mechanical strength; in particular, it is not necessary for said plates to be made with metal, as they can be of any other material suitable for said purpose, such as specific kinds of ceramics or synthetic material.
  • Fig. 15 which remains unchanged, with the exception of the opening IE and UE that are not used and consequently closed with respect to outside access.
  • a very rich mixture in its vapour state enters the device coming from an appropriate vapour generator located outside the device.
  • a rich fluid mixture to be distilled enters as above through the opening IL while the poor fluid mixture and the previously rectified vapour go out from the openings UL and UV.
  • the thermal exchange ducts 49 will circulate the refrigerating fluid through the through holes array 46, whereas the remaining ones only have a structural function.
  • the rectifying device according to this invention may just have a first separating flat plate 13, an undefined number of rectify side" perforated flat plates 22 and 22.R in alternated sequence and a second separating flat plate 13.
  • the boiling zones 32 extend from the lower opening levels US and UE up to the height of the upper openings IP and UV.
  • thermal exchange ducts made with the same kind of rectify side" perforated plates 22 and 22.R are provided with the same type of ducts 49, but tilted by 180° around their horizontal axis in respect to how they are shown in Fig. 15; thus the heating fluid can enter openings IR and go out from openings UE.
  • the lean mixture enters the opening IL and the vapour to be absorbed enters the opening UV, whereas the rich mixture flows out of the opening UL.
  • thermal exchange ducts wherefrom the heat generated by the absorption process has to be evacuated, these can be exactly as described for the above Distiller Device or Vapour Generator".
  • distiller or rectifying columns allowing vapour tappings in several zones, for instance to separate more substances from each other, the same as more than two thermal exchange zones with over two thermal carrier fluids can be foreseen, wherever for complex systems the available fluids can be used at their best under different temperature conditions in various cycle stages.
  • Intermediate fluid heat exchangers can be obtained when due to safety reasons it is not appropriate for the two heat exchanging fluids to lick directly the opposite faces of one same wall.
  • a first fluid circulating in the ducts 44 can release heat to a second fluid circulating in the ducts 46 through an intermediate fluid continuously boiling and recondensing in the ducts 48.
  • the rectify side" perforated flat plates 22.R can be obtained from the rectify side" perforated flat plates 22 simply rotating them by 180° in respect to their centre, the same as said rectify side" perforated flat plates 22.R can be developed from a completely different design of said rectify side" perforated flat plates 22.
  • the same conditions applies for the exchanger side" perforated flat plates 35 and 35.R, provided that when overlapping all the plates mentioned above the through holes arrays 31, 44, 45, 46 provide for the contact zones 11.A and the through gaps 11.B and that opening continuity is warranted (IL, UL, IV, UV, IE, UE, IR, UR).
  • thermofluid-dynamics requirements such as thermal exchange performance or loss of acceptable charge
  • solutions can be reached not only changing, from time to time, the design of the through holes arrays 33, 44 or 46, but maintaining unchanged in many applications the design of the perforated flat plates 22 or 35, and changing their number and/or thickness when forming each duct 48 or 49.
EP96120289A 1995-12-19 1996-12-17 Einrichtung für Wärme- und/oder Stoffaustausch Ceased EP0780654A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95TO001023A IT1286374B1 (it) 1995-12-19 1995-12-19 Dispositivo per lo scambio di calore e/o materia
ITTO951023 1995-12-19

Publications (1)

Publication Number Publication Date
EP0780654A1 true EP0780654A1 (de) 1997-06-25

Family

ID=11414042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96120289A Ceased EP0780654A1 (de) 1995-12-19 1996-12-17 Einrichtung für Wärme- und/oder Stoffaustausch

Country Status (3)

Country Link
EP (1) EP0780654A1 (de)
CA (1) CA2193406A1 (de)
IT (1) IT1286374B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066280A1 (en) * 1998-06-12 1999-12-23 Chart Heat Exchangers Limited Heat exchanger
EP1767886A2 (de) * 1999-03-27 2007-03-28 CHART HEAT EXCHANGERS Limited Partnership Vorrichtung zur Mischung von Fluiden
GB2460940A (en) * 2008-06-20 2009-12-23 Voith Patent Gmbh Stacked plate heat exchanger
DE102011079634A1 (de) * 2011-07-22 2013-01-24 Siemens Aktiengesellschaft Vorrichtung zum Kühlen und Verfahren zu deren Herstellung sowie Verwendung der Vorrichtung
DE102012106244B4 (de) * 2012-07-11 2020-02-20 Rogers Germany Gmbh Metall-Keramik-Substrat
CN112629294A (zh) * 2020-12-30 2021-04-09 大连海事大学 一种三股流螺旋缠绕印刷电路板式换热器芯体

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2290646A1 (fr) * 1974-11-06 1976-06-04 Commissariat Energie Atomique Echangeur a plaques
WO1990013784A1 (en) * 1989-05-04 1990-11-15 The Secretary Of State For Trade And Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Heat exchangers
DE4238192A1 (de) * 1992-11-12 1994-05-19 Hoechst Ceram Tec Ag Durchlässige Strukturen
EP0724127A2 (de) * 1995-01-27 1996-07-31 Diana Giacometti Platten - Stoff- und Wärmetauscher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2290646A1 (fr) * 1974-11-06 1976-06-04 Commissariat Energie Atomique Echangeur a plaques
WO1990013784A1 (en) * 1989-05-04 1990-11-15 The Secretary Of State For Trade And Industry In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Heat exchangers
DE4238192A1 (de) * 1992-11-12 1994-05-19 Hoechst Ceram Tec Ag Durchlässige Strukturen
EP0724127A2 (de) * 1995-01-27 1996-07-31 Diana Giacometti Platten - Stoff- und Wärmetauscher

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066280A1 (en) * 1998-06-12 1999-12-23 Chart Heat Exchangers Limited Heat exchanger
US6968892B1 (en) 1998-06-12 2005-11-29 Chart Heat Exchangers Limited Heat exchanger
EP1767886A2 (de) * 1999-03-27 2007-03-28 CHART HEAT EXCHANGERS Limited Partnership Vorrichtung zur Mischung von Fluiden
EP1767886A3 (de) * 1999-03-27 2008-12-17 CHART HEAT EXCHANGERS Limited Partnership Vorrichtung zur Mischung von Fluiden
GB2460940A (en) * 2008-06-20 2009-12-23 Voith Patent Gmbh Stacked plate heat exchanger
GB2460940B (en) * 2008-06-20 2012-08-15 Voith Patent Gmbh Vaporizer for a waste heat recovery system
DE102011079634A1 (de) * 2011-07-22 2013-01-24 Siemens Aktiengesellschaft Vorrichtung zum Kühlen und Verfahren zu deren Herstellung sowie Verwendung der Vorrichtung
DE102012106244B4 (de) * 2012-07-11 2020-02-20 Rogers Germany Gmbh Metall-Keramik-Substrat
CN112629294A (zh) * 2020-12-30 2021-04-09 大连海事大学 一种三股流螺旋缠绕印刷电路板式换热器芯体
CN112629294B (zh) * 2020-12-30 2022-04-08 大连海事大学 一种三股流螺旋缠绕印刷电路板式换热器芯体

Also Published As

Publication number Publication date
ITTO951023A1 (it) 1997-06-19
CA2193406A1 (en) 1997-06-20
IT1286374B1 (it) 1998-07-08
ITTO951023A0 (it) 1995-12-19

Similar Documents

Publication Publication Date Title
US5316628A (en) Process and device for the simultaneous transfer of material and heat
US2885195A (en) Fractionating apparatus
KR100203727B1 (ko) 열교환기
US8408026B2 (en) Liquid collector and redistributor for packed columns
US9568222B2 (en) Plate-based adsorption chiller subassembly
EP0477346B1 (de) Plattenverdampfer
US7472563B2 (en) Submerged evaporator with integrated heat exchanger
GB1532673A (en) Plate-type heat exchanger
KR102249945B1 (ko) 증발 및 흡수유닛
JPH0117069B2 (de)
EP0371122B1 (de) Plattenverdampfer
EP0780654A1 (de) Einrichtung für Wärme- und/oder Stoffaustausch
US5572885A (en) Shrouded coiled crested tube diabatic mass exchanger
US5755279A (en) Heat exchanger
US5718127A (en) Liquid vapor contact apparatus
WO2001044729A1 (en) Mass and heat transfer devices and methods of use
US4574007A (en) Fractionating apparatus
US6883788B1 (en) Shielding of heat exchangers in columns
CA2067036A1 (en) Method of and apparatus for cartridge tray sealing
US5667643A (en) Heat exchanger and double distillation column
WO2006104476A2 (en) Shielding of heat exchangers in columns
JPH0534082A (ja) 凝縮蒸発器
US3461677A (en) Helically distributed heat exchange fractionating column
TWM570411U (zh) Using a capillary structure and a bump to form a temperature equalizing plate of a liquid vapor channel
JP4174109B2 (ja) 流下液膜式凝縮蒸発器及びその使用方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL PAYMENT 970115;LT PAYMENT 970115;LV PAYMENT 970115;RO PAYMENT 970115;SI PAYMENT 970115

17P Request for examination filed

Effective date: 19971216

17Q First examination report despatched

Effective date: 20000405

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20040309