WO1993010416A1 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
WO1993010416A1
WO1993010416A1 PCT/FI1992/000309 FI9200309W WO9310416A1 WO 1993010416 A1 WO1993010416 A1 WO 1993010416A1 FI 9200309 W FI9200309 W FI 9200309W WO 9310416 A1 WO9310416 A1 WO 9310416A1
Authority
WO
WIPO (PCT)
Prior art keywords
recited
metal
layer
heat exchanger
thickness
Prior art date
Application number
PCT/FI1992/000309
Other languages
English (en)
Inventor
Jarmo SÖDERMAN
Original Assignee
A. Ahlstrom Corporation
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 A. Ahlstrom Corporation filed Critical A. Ahlstrom Corporation
Priority to EP92922936A priority Critical patent/EP0612397A1/fr
Priority to JP5509013A priority patent/JPH07501393A/ja
Publication of WO1993010416A1 publication Critical patent/WO1993010416A1/fr
Priority to NO941840A priority patent/NO941840L/no
Priority to FI942259A priority patent/FI942259A0/fi

Links

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
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/04—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of rubber; of plastics material; of varnish
    • 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
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels

Definitions

  • the present invention relates to a heat exchanger, i which a new kind of an extremely thin, but yet stron heat exchange surface is utilized, and a method o evaporating an effluent from a cellulose pulp mill utilizing such a heat exchanger as a falling fil evaporator.
  • Heat exchange devices such as lamella heat exchangers, are conventionally manufactured of metal, e.g. of stainless steel. Lamellas have been manufactured of 1-1.5 mm thick metal plates to act as heat exchange elements, for example, in evaporators. Such a construction allows considerable pressure differences, but on the other hand it is heavy and rather expensive. If acid solutions are treated, the problem of corrosion arises, which again leads to the necessity of using special steel or titanium as the material of heat exchange surface, which considerably increases the price of the eguipment.
  • Heat exchangers of light, corrosion-resistant and inexpensive construction have been manufactured by utilizing a thin plastic film as a heat exchange surface, whereby the heat exchange elements may, for example, be bag-like.
  • Such heat exchangers are known, for example, from patent publications EP 34920 and DE 2511144.
  • Plastics have, however, the disadvantage of poor heat conductivity and poor physical properties when in a thin film configuration.
  • EP 286400 discloses a plate-type heat exchanger in which the heat exchanger element is manufactured by combining two polymer panels of the thickness of 0.12-0.7 mm under heat and pressure to form flow channels therebetween. A first surface of one of the panels is coated with a particular material at a desired channel pattern. A second surface of the other panel facing the first surface i treated with a material such that, when the two surface are combined, it attaches to the first panel surface except at the flow channels.
  • the polymer used is preferabl a polyamide,. which may be coated by a metal film to improv its heat exchange properties.
  • a heat exchange applicable for different purposes is provided which is simple to manufacture, and the heat exchange surface of which conducts heat well, is thin and light, but yet at the same time strong.
  • a characteristic feature of the heat exchanger in accordance with the present invention is that the heat exchange surface of the heat exchange elements is formed of a laminate , which comprises at least two layers of different materials, a metal film layer and a plastics layer.
  • the laminate is manufactured preferably by combining a plastics layer to a thin metal folio layer.
  • the heat exchange surface thus generated is light and the strength thereof is decisively better than that of a mere metal folio, and its heat transfer capabilities are greater than those of plastic. Also the manufacture of such a heat exchanger is less expensive than its metal counterpart.
  • a laminate comprises three layers, i.e. two plastics layers and a metal layer sandwiched therebetween.
  • the invention also contemplates use of the heat exchanger in a method of evaporating a liquid effluent (e.g. from a cellulose pulp mill) utilizing an evaporator surface comprising a metal-plastic laminate having a thickness of less than about 200 ⁇ m, comprising the step of passing pulp mill liquid effluent in a falling film over the metal-plastic laminate surface.
  • This step may be further practiced by passing the pulp mill effluent in contact with the plastic layer of the metal-plastic laminate. Steam may pass interiorly of the laminate to provide -heat for the evaporation of the liquid effluent.
  • FIGURES 1 and 2 are fragmentary cross-sectional views of exemplary lamella according to the present invention.
  • FIGURE 3 is a side schematic view illustrating use of the lamella of FIGURE 1 as an evaporator.
  • the laminate 3 comprises a metal folio 1 and a plastics film 2. It is manufactured by means of methods known per se, for example, by gluing the metal folio 1 and the plastics film 2 to each other, or by extruding the plastics film 2 onto the metal folio 1.
  • the lamella 4 is preferably manufactured by attaching two rectangular laminate strips
  • the plastics layer 2 in the laminate strip 3 may be longer than the metal layer 1, whereby the outer layers of plastics 2 are also attached to each other by adhesiv joint 5, as seen in Fig 1.
  • metal layer 1 in Fig. 1 e.g. the steam space
  • the interior surface of metal layer 1 may be coated, as seen at 6 in Fig. 1, so that corrosion protection is provided for both the outer (by layer 2) and the inner surfaces of the metal folios 1.
  • the protective coating 6 may comprise a film or paint.
  • the inner pressure of the lamella 4 is slightly greater than the pressure of the outside, whereby the laminate walls 3 are maintained at a distance from each other due to a pressure difference so that a passage for the heat exchange medium is formed between the walls.
  • the laminates 3 may also be attached to each other by means of dot-like junction points (not shown) instead of spacers 7, for example by attachment with adhesive so as to limit the changes of form caused by the pressure of the heat exchange medium such as steam flowing between them.
  • a laminate 3' comprises three different layers, whereby a metal film layer 1' is set between two plastics layers 2' .
  • the laminate strips forming a lamella 4' are attached to each other, as described in connection with Fig. 1, for example by a glue joint 5' .
  • the inner layer 1, 1* of the lamella illustrated in Figs. 1 and 2 is preferably the metal layer, and the outer layer
  • the metal layer 1, 1' may alternatively be on the outer surface of the lamella 4, 4' .
  • the metal layer 1, 1' of the laminate may contain any known metal or a compound or alloy thereof, such as aluminum, brass or copper. The most appropriate metal is believed to be aluminum due to its inexpensiver-ess.
  • the thickness of the metal folio layer 1, 1' may be very small, but it must provide the laminate 3 with sufficient rigidity. Normally a thickness of layer 1, 1' less than about 100 ⁇ m is sufficient, but also thicker films (e.g. 200 ⁇ m) are possible and utilized, if the attaching method of the laminate layers and the construction of the heat exchanger require them. When aluminum is used usually a thickness of about 5-40 ⁇ m, preferably about 9-18 ⁇ m, is sufficient.
  • Applicable materials for the plastic layer 2, 2' may vary widely. Various plastics may be chosen, for example, according to the application purpose of the particular heat exchanger.
  • the plastic material of the layer 2, 2' must provide a sufficient mechanical strength and corrosion resistance given the operation conditions of the heat exchanger.
  • the thickness of each plastics film 2, 2' is less than about 100 ⁇ m. In most cases applicable plastics are polyester and polyolefins, such as polyethylene and polypropylene, whereby the thickness of a plastics layer is preferably about 12-25 ⁇ m.
  • Heat exchange units 8 may be formed by means known per s from lamellas 4, 4* in accordance with the drawings to provide units of different sizes for different purposes. Lamellas 4, 4' may be attached one after another in a supporting frame to form a lamella cassette, as is known per se. A desired number of cassettes may be set within the same casing to form an evaporator.
  • a rather rigid, but yet flexible heat exchange lamella 4 which is corrosion resistant yet of sufficiently strong construction so as to be used as an evaporator, e.g. for evaporating waste liquids in a cellulose pulp mill. It operates, for example with respect to Fig. 3, as a falling film evaporator 8 in such a way that the condensing steam is supplied into the interior of the lamella 4 at inlet 10, and the liquid being evaporated (e.g. waste water) is caused to flow over the outer surface of the lamella 4, as indicated at 9 in Fig. 3. Vapour obtained in the evaporation is withdrawn from the space between the lamellas 4 at 11. The treated liquid (concentrate) is withdrawn at 12 and the condensate formed in the interior of the lamella is withdrawn at 13. The condensate 13 (clean water) is recycled back to the process.
  • the condensing steam is supplied into the interior of the lamella 4 at inlet 10
  • the liquid being evaporated e.g. waste water
  • thermo difference T is a function of the pressure difference and the boiling point elevation of the liquid being evaporated.
  • the above description illustrates the use of a laminate 3 formed by combining at least two different materials for the manufacture of evaporators, but the use of the laminates is not limited for this. Instead it may be used as a heat transfer surface also in many other applications, such as in effecting heat transfer between two liquids.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Un échangeur de chaleur, un dispositif d'évaporation produit à partir de cet échangeur de chaleur, ainsi qu'un procédé d'utilisation de ces derniers sont décrits. L'échangeur de chaleur utilise avantageusement la surface d'échange de chaleur mince, et néanmoins robuste et adéquate, constituée par un stratifié métal-plastique. Le stratifié comprend généralement, soit une couche plastique et une couche métallique, soit deux couches plastiques entre lesquelles une couche métallique est prise en sandwich. Le stratifié présente généralement une épaisseur inférieure à 200 νm environ, la couche de la feuille métallique présentant notamment une épaisseur comprise entre 5 et 40 νm environ, alors que la couche plastique présente une épaisseur comprise entre 12 et 45 νm. Les métaux appropriés sont l'aluminium, le cuivre et le laiton, tandis que les plastiques appropriés sont le polyester et les polyoléfines. Des effluents liquides d'une fabrique de pâte à papier peuvent passer sur les laminés sous forme d'un ruissellement afin d'être évaporés, alors que la vapeur passe dans la chambre interne située entre deux stratifiés constituant un dispositif d'évaporation.
PCT/FI1992/000309 1991-11-18 1992-11-16 Echangeur de chaleur WO1993010416A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP92922936A EP0612397A1 (fr) 1991-11-18 1992-11-16 Echangeur de chaleur
JP5509013A JPH07501393A (ja) 1991-11-18 1992-11-16 熱交換器
NO941840A NO941840L (no) 1991-11-18 1994-05-16 Varmeveksler
FI942259A FI942259A0 (fi) 1991-11-18 1994-05-16 Lämmönsiirrin

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI915424A FI93145C (fi) 1991-11-18 1991-11-18 Lämmönsiirrin
FI915424 1991-11-18

Publications (1)

Publication Number Publication Date
WO1993010416A1 true WO1993010416A1 (fr) 1993-05-27

Family

ID=8533512

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1992/000309 WO1993010416A1 (fr) 1991-11-18 1992-11-16 Echangeur de chaleur

Country Status (7)

Country Link
EP (1) EP0612397A1 (fr)
JP (1) JPH07501393A (fr)
AU (1) AU2901992A (fr)
CA (1) CA2083118A1 (fr)
FI (2) FI93145C (fr)
NO (1) NO941840L (fr)
WO (1) WO1993010416A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013112A1 (fr) * 1995-10-03 1997-04-10 Hadwaco Ltd. Oy Echangeur de chaleur et son procede de fabrication
WO2003027596A1 (fr) * 2001-09-27 2003-04-03 E.I. Du Pont De Nemours And Company Ruban barriere echangeur de chaleur a tubes de polymere
US7316666B1 (en) 2004-04-12 2008-01-08 Arizant Healthcare Inc. Fluid warming cassette with rails and a stiffening member
US7853131B2 (en) 1999-10-08 2010-12-14 Arizant Healthcare Inc. Intravenous fluid warming cassette
GB2491623A (en) * 2011-06-09 2012-12-12 Alberto Martinez Albalat Multilayer fluid heat exchanger comprising plastic and metal layers
US8620149B2 (en) 2003-03-25 2013-12-31 Arizant Healthcare Inc. Fluid warming cassette and system capable of operation under negative pressure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2170132C (fr) * 1993-09-03 2004-04-20 Yumiko Kujirai Panneau thermo-isolant et methode d'isolation thermique faisant appel audit panneau

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2204788A1 (en) * 1972-10-30 1974-05-24 Tranter Mfg Inc Plate heat exchanger unit - made from two flat plates spot welded together in rhombus pattern
DE2421414A1 (de) * 1973-05-09 1974-12-19 Kureha Chemical Ind Co Ltd Waermeaustauscher, insbesondere zum waermeaustausch zwischen gasen
EP0002692A1 (fr) * 1977-12-22 1979-07-11 Bayer Ag Fabrication et utilisation de feuilles stratifiées aluminium-matière plastique imperméables aux gaz
DE3102523C2 (de) * 1981-01-27 1985-10-10 Ludwig 8448 Leiblfing Penzkofer Gegenstromwärmetauscher
US4969507A (en) * 1977-06-30 1990-11-13 Rosenblad Axel E Integral blow down concentrator with air-cooled surface condenser

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2204788A1 (en) * 1972-10-30 1974-05-24 Tranter Mfg Inc Plate heat exchanger unit - made from two flat plates spot welded together in rhombus pattern
DE2421414A1 (de) * 1973-05-09 1974-12-19 Kureha Chemical Ind Co Ltd Waermeaustauscher, insbesondere zum waermeaustausch zwischen gasen
US4969507A (en) * 1977-06-30 1990-11-13 Rosenblad Axel E Integral blow down concentrator with air-cooled surface condenser
EP0002692A1 (fr) * 1977-12-22 1979-07-11 Bayer Ag Fabrication et utilisation de feuilles stratifiées aluminium-matière plastique imperméables aux gaz
DE3102523C2 (de) * 1981-01-27 1985-10-10 Ludwig 8448 Leiblfing Penzkofer Gegenstromwärmetauscher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 8, No. 201, M-325; & JP,A,59 089 998 (YAZAKI SOUGIYOU K.K.), 24 May 1984 (24.05.84), see the whole document. *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013112A1 (fr) * 1995-10-03 1997-04-10 Hadwaco Ltd. Oy Echangeur de chaleur et son procede de fabrication
AU700090B2 (en) * 1995-10-03 1998-12-24 Hadwaco Ltd Oy Heat exchanger and a method for producing the same
US5927383A (en) * 1995-10-03 1999-07-27 Hadwaco Ltd Oy Heat exchanger and a method for producing the same
US7853131B2 (en) 1999-10-08 2010-12-14 Arizant Healthcare Inc. Intravenous fluid warming cassette
WO2003027596A1 (fr) * 2001-09-27 2003-04-03 E.I. Du Pont De Nemours And Company Ruban barriere echangeur de chaleur a tubes de polymere
US6742576B2 (en) 2001-09-27 2004-06-01 E. I. Du Pont De Nemours And Company Heat exchanger barrier ribbon with polymeric tubes
US8620149B2 (en) 2003-03-25 2013-12-31 Arizant Healthcare Inc. Fluid warming cassette and system capable of operation under negative pressure
US7316666B1 (en) 2004-04-12 2008-01-08 Arizant Healthcare Inc. Fluid warming cassette with rails and a stiffening member
GB2491623A (en) * 2011-06-09 2012-12-12 Alberto Martinez Albalat Multilayer fluid heat exchanger comprising plastic and metal layers
CN103608059A (zh) * 2011-06-09 2014-02-26 摄尔修斯医疗有限公司 液体加温或冷却系统
EP2717948B1 (fr) * 2011-06-09 2016-09-14 Celsius Medical S.L. Système de chauffage ou de refroidissement de fluide

Also Published As

Publication number Publication date
AU2901992A (en) 1993-06-15
EP0612397A1 (fr) 1994-08-31
NO941840D0 (no) 1994-05-16
FI915424A0 (fi) 1991-11-18
FI942259A (fi) 1994-05-16
CA2083118A1 (fr) 1993-05-19
FI93145B (fi) 1994-11-15
JPH07501393A (ja) 1995-02-09
NO941840L (no) 1994-05-16
FI915424A (fi) 1993-05-19
FI93145C (fi) 1995-02-27
FI942259A0 (fi) 1994-05-16

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