EP0566208A1 - Echangeur de chaleur à plaques et méthode pour sa fabrication - Google Patents

Echangeur de chaleur à plaques et méthode pour sa fabrication Download PDF

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Publication number
EP0566208A1
EP0566208A1 EP93201092A EP93201092A EP0566208A1 EP 0566208 A1 EP0566208 A1 EP 0566208A1 EP 93201092 A EP93201092 A EP 93201092A EP 93201092 A EP93201092 A EP 93201092A EP 0566208 A1 EP0566208 A1 EP 0566208A1
Authority
EP
European Patent Office
Prior art keywords
plates
heat exchanger
edges
type heat
connecting flanges
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.)
Withdrawn
Application number
EP93201092A
Other languages
German (de)
English (en)
Inventor
Harmen Pierre Slump
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.)
Lummus Technology Heat Transfer BV
Original Assignee
ABB Lummus Heat Transfer BV
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 ABB Lummus Heat Transfer BV filed Critical ABB Lummus Heat Transfer BV
Publication of EP0566208A1 publication Critical patent/EP0566208A1/fr
Withdrawn legal-status Critical Current

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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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • 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
    • F28D9/0031—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 paired plates touching each other
    • F28D9/0037—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 paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2235/00—Means for filling gaps between elements, e.g. between conduits within casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements

Definitions

  • the invention relates to a plate type heat exchanger having a plurality of substantially parallel spaced apart plates in particular of enamelled steel, spaces for two separate fluid flows being alternately formed between the plates, and adjacent plates being joined at their edges, except for connecting openings, to form a plate pack.
  • the plates are provided on their edges with packings of silicon rubber keeping the plates space apart and sealing the space between the plates.
  • packings decay rather quickly, which leads to leakage.
  • the object of the invention is to provide a plate type heat exchanger of the type mentioned in the preamble, in which this disadvantage is removed in an effective way.
  • the plate type heat exchanger according to the invention is characterized in that the adjacent plates comprise on at least two edges connecting flanges bent over towards each other and connected by welding, at least the connecting flanges of some of said adjacent plates abut in flat relationship and are welded on their outer edges.
  • the welded joint between the individual plates creates a very reliable seal which does not suffer from leakages also after a longer period of time.
  • the welding operation is hindered by the enamel layer protecting the plates from the attack of acids and which might be broken by the welding operation leading to weak spots.
  • the enamel of the plates melts at the inner edges of these flanges and flows into the seam between the flanges to such extent that their is formed a closed protective enamel layer on the inner edges obviating the necessity of a further after-treatment or renewed enamel covering of the whole plate pack. It is not necessary that all plates are interconnected in this manner. It is also possible that groups of plates are welded in another way and are enamelled (again).
  • the invention is particularly suited for use in plate type heat exchangers working according to the cross-flow principle in which the fluid flows on both sides of each plate are directed substantially perpendicular. The perpendicularly directed edges of the plates are then alternately welded.
  • a further problem with plate type heat exchangers is the suspension of the plate pack within a frame in such manner that a certain thermal expansion due to temperature variations is admitted.
  • plastic block elements are provided at the corners of the plate pack allowing flanges of the frame to engage them to retain the plate pack within the frame.
  • the plastic block elements also function as sealing elements on the corners of the plates, for which purpose they are preferably provided with grooves with which they may be put onto the plates.
  • the invention further includes a method of manufacturing a plate type heat exchanger having a plurality of spaced parallel plates, in particular of enamelled steel, wherein adjacent plates are connected, except for connecting openings, on their edges into a plate pack, which is characterized according to the invention in that the edges of the plates are bent over to form connecting flanges, whereafter the plates are connected by welding at the position of the connecting flanges bent over towards each other, at least some of the plates being connected by means of connecting flanges abutting in flat relationship and being welded on their outer edges.
  • This method allows at least a part of the enamelled plates to be welded together without necessitating a further after-treatment or enamelling treatment of the whole plate pack because, as mentioned before, the enamel starts to flow during the welding operation and forms a layer sealing the seams between the plate flanges.
  • each group of plates in some cases it is possible to first weld small groups, for instance pairs, of plates to each other in a manner other than described and to enamel them again or for the first time, whereafter the groups of plates are assembled by welding the flanges abutting in a flat relationship in order to form the complete plate pack.
  • the outer side of each group of plates or the complete pack can always be enamelled locally or completely by spraying.
  • Fig. 1 is a perspective, partially cut-away view of an exemplary embodiment of a section of a heat exchanger according to the invention.
  • Fig. 2 shows detail II of Fig. 1 with blocking elements demounted.
  • Fig. 3 is a view corresponding to that of Fig. 2, but showing a modified embodiment.
  • Fig. 4 is a view corresponding to that of Fig. 2, but showing still another embodiment.
  • Fig. 5 is a view corresponding to that of Fig. 2, but showing still a further embodiment.
  • the heat exchanger comprises a number of parallel spaced apart plates 2 assembled into a plate pack 1.
  • the plates 2 define between them alternating spaces for two separate fluid flows between which heat should be exchanged.
  • the heat exchanger works according to the cross-flow principle in which a first fluid flow (arrow A) is directed perpendicularly to the adjacent fluid flow (arrow B).
  • the invention is, however, also useful with other principles, such as the counter-flow principle.
  • the plates 2 are made of steel having a low carbon content (C ⁇ 0.05 %) covered by two layers of enamel in order to make the heat exchanger resistant to gasses containing aggressive acids and in environments within the heat exchanger having temperatures which are around of below the condensation point of the acid causing the risk of corrosion.
  • the enamel layer offers an excellent protection against most of these acids, and in any case against H2SO4, H2SO3 and HCL. This makes the heat exchanger particularly suited for desulphurization and nitrogen reduction projects.
  • the plate type heat exchanger is also suitable for use in post-burning installations in refuse incineration. Of course also other uses are conceivable.
  • the plate 2 may for example have a thickness of 1.5 mm and a dimension of 1.2 x 1.8 meter.
  • the plate 2 may for example have a thickness of 1.5 mm and a dimension of 1.2 x 1.8 meter.
  • the overpressures of the gasses will mostly not exceed circa 50 kPa.
  • the flanges 5 and 6 are of equal construction and extend parallel to the plane of the plates 2, but spaced therefrom.
  • the flanges 5 and 6 are connected to the plates 2 through an inclined wall part 7, 8 respectively.
  • the connecting flanges 5 or 6 of two opposite edges thereof are positioned in flat abutting relationship and the outer edges thereof are welded so as to form an edge weld 9, 10 respectively. Due to the heat supply during the welding of the connecting flanges 5, 6, the enamel of the enamel layer of both plates 2 flows together on the inner edges of these connecting flanges 5, 6 so that a closed enamel layer is formed over the seam between the connecting flanges 5 or 6 of both adjacent plates 2. In this manner there is created a full protective layer around the flow space for the fluids preventing corrosion of the plates 2, without further after-treatment or enamel covering of the plates 2.
  • a favourable welding method is the laser welding method because the heat supply can there be controlled very well and consequently a controlled flow of the enamel can be obtained.
  • the plate pack 1 formed by welding together the individual plates 2, within a frame 11, shown partly in Fig. 1, there are positioned on four edges of the plate pack 1 plastic block elements 12 allowing engagement of corner sections 13 of the frame 11 to confine the plate pack 1 within the frame 11 by clamping it together.
  • the block elements are made up from a plurality of small plastic blocks 14 and 15 having a similar shape, but being mounted alternately in a different manner to the plate pack so as to create the block element 12.
  • each connecting flange 5, 6 terminates a distance from the adjacent perpendicular edge of the respective plate 2, and also a portion of the wall part 7, 8 is taken away along the same distance.
  • each small block 14, 15 are arranged two inclined grooves 16 with which the blocks 14, 15 may be slid over the wall portions 7 or 8 of adjacent plates 2 allowing the blocks 14, 15 to partially submerge in the space between adjacent plates 2.
  • the blocks 14, 15 function as seal element on corner edges of the plate pack 1 and the created block elements 12 form flanges for the plate pack 1 admitting a certain thermal expansion.
  • a material of the blocks 14, 15 suited for these purposes is for instance teflon, which is resistant to acids and high temperatures up to 270°C. Of course also other plastics may be used depending on the use of the heat exchanger. Another conceivable plastic is polyvinyldifluoride.
  • the embodiment of the heat exchanger shown in Fig. 1 is particularly suited for the heat exchange between a clean gas flowing horizontally through horizontal flow spaces between the adjacent plates 2 (arrow A) and an aggressive gas flowing vertically through the adjacent spaces according to arrow B. Any condensate of such an aggressive gas will flow along the walls of the plates 2 to the exterior of the plate pack 1 so that no acid remains within the plate pack.
  • a clean gas flowing horizontally through horizontal flow spaces between the adjacent plates 2 (arrow A)
  • an aggressive gas flowing vertically through the adjacent spaces according to arrow B Any condensate of such an aggressive gas will flow along the walls of the plates 2 to the exterior of the plate pack 1 so that no acid remains within the plate pack.
  • To form larger heat exchangers it is possible to connect several plate packs 1 to each other, but on the other hand it is also possible to connect a supply and discharge for the respective gasses to the plate pack 1 as shown.
  • Fig. 3 shows an alternative of the embodiment of Fig. 2, the difference being that the wall portions 7 and 8 are not bent over 45° as in Fig. 2, but an angle of 90° with respect to the plane of the plates 2.
  • the shape of the blocks 14, 15 is adapted to the shape of the connecting flanges 5, 6 and wall parts 7, 8.
  • This embodiment is suited for the same use as that of Fig. 2, but for higher pressures of the gasses, or for another use in which the load on the plates 2 can be high.
  • the embodiment of the heat exchanger of Fig. 4 is particularly suited for exchanging heat between two corrosive gasses.
  • the connecting flanges 6 and the wall parts 8 on the upper and lower side of the plates 2 are replaced by a horizontally flanged flange 17, the flanges 17 of adjacent plates 2 being interconnected by means of a buttweld 18.
  • pairs of plates 2 are each time connected to each other through the connecting flanges 17, the butt ends of the flanges 17 are grind and etched on the outer side. Then each pair of plates 2 is again enamelled completely.
  • the pairs of plates 2 are interconnected to the connecting flanges 5 in a manner described above and are assembled into the plate pack 1.
  • the plate pack 1 is suspended within the frame 11 at an angle of 1 to 2° in order to allow the corrosive condensate of the gas to flow out.
  • Fig. 5 shows another variant of the embodiment of Fig. 4.
  • the dimensions of the blocks 15 are minimized.
  • the slots 16 are omitted which is made possible by removing the upper edges of the wall parts 7.
  • an enamelled cover plate 19 on the pair of abutting flanges 5 with an interposed ceramic paste.
  • the outer end of each block 15 has a downwardly projecting edge 20 lying over the cover plate 19.
  • the frame in which the plate pack 1 is suspended, preferably comprises adjusting elements, such as adjustable supports or spacers.
  • adjusting elements such as adjustable supports or spacers.
  • the invention is not restricted to the embodiments described above and shown in the drawing, which can be varied in different manners within the scope of the invention. It is for instance possible to replace enamel by another material as protecting layer on the plates, which flows at higher temperatures. Also other welding methods besides laser welding can be used.

Landscapes

  • 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)
EP93201092A 1992-04-16 1993-04-15 Echangeur de chaleur à plaques et méthode pour sa fabrication Withdrawn EP0566208A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9200698A NL9200698A (nl) 1992-04-16 1992-04-16 Platenwarmtewisselaar, alsmede werkwijze voor de vervaardiging hiervan.
NL9200698 1992-04-16

Publications (1)

Publication Number Publication Date
EP0566208A1 true EP0566208A1 (fr) 1993-10-20

Family

ID=19860702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93201092A Withdrawn EP0566208A1 (fr) 1992-04-16 1993-04-15 Echangeur de chaleur à plaques et méthode pour sa fabrication

Country Status (3)

Country Link
EP (1) EP0566208A1 (fr)
JP (1) JPH0611290A (fr)
NL (1) NL9200698A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2806469A1 (fr) * 2000-03-20 2001-09-21 Packinox Sa PROCEDE d4ASSEMBLAGE DES PLAQUES D'UN FAISCEAU DE PLAQUES ET FAISCEAU DE PLAQUES REALISE PAR UN TEL PROCEDE
GB2361991A (en) * 2000-03-10 2001-11-07 Smiths Group Plc A Heat Recovery Unit
US6460614B1 (en) 1997-12-02 2002-10-08 De Dietrich Process Systems Substantially flat enamelled metal heat exchanger
EP1323998A2 (fr) * 2001-12-27 2003-07-02 Xenesys Inc. Unité d'échange de chaleur
EP1555500A2 (fr) * 2004-01-13 2005-07-20 Econ Export + Consulting Group GmbH Echangeur de chaleur
FR2939879A1 (fr) * 2008-12-15 2010-06-18 Vitherm Echangeur thermique a plaques soudees
WO2013189587A1 (fr) * 2012-06-18 2013-12-27 Api Schmidt-Bretten Gmbh & Co. Kg Échangeur de chaleur à plaques
WO2014085874A3 (fr) * 2012-12-05 2014-09-12 Polyvision, Naamloze Vennootschap Échangeurs de chaleur
US10054374B2 (en) 2008-07-09 2018-08-21 Euro-Apex B.V. Heat transfer cell for heat exchanger and assembly, and methods of fabricating the same
CN111433551A (zh) * 2017-12-05 2020-07-17 舒瑞普国际股份公司 热交换器
KR102552970B1 (ko) * 2023-01-09 2023-07-10 이형규 현열교환기

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4666142B2 (ja) * 2005-03-08 2011-04-06 株式会社ゼネシス 熱交換器外殻構造
JP5486841B2 (ja) * 2009-05-21 2014-05-07 三菱電機株式会社 ドロンカップ型熱交換器
CN102192676B (zh) * 2010-03-16 2013-08-07 四平艾维能源科技有限公司 全焊接板式换热器
SE534915C2 (sv) * 2010-06-18 2012-02-14 Alfa Laval Corp Ab Plattvärmeväxlare och metod för tillverkning av en plattvärmeväxlare
KR102524261B1 (ko) * 2016-11-29 2023-04-24 엘지전자 주식회사 고온재생기
KR101965245B1 (ko) * 2017-07-04 2019-04-03 박덕열 산노점 방지 기능을 갖는 판형 열교환기

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959401A (en) * 1957-11-27 1960-11-08 Modine Mfg Co Plate-fin type heat exchanger and method of making the same
US3274672A (en) * 1963-06-04 1966-09-27 Air Preheater Method of making a heat exchanger
FR2317617A1 (fr) * 1975-07-11 1977-02-04 Alusuisse Echangeur thermique en feuilles minces
FR2318398A1 (fr) * 1975-07-18 1977-02-11 Munters Ab Carl Procede de realisation d'un corps d'echange de chaleur pour des echangeurs a recuperation
FR2392349A1 (fr) * 1977-05-27 1978-12-22 Pfaudler Werke Ag Echangeur de chaleur emaille
JPS57149083A (en) * 1981-03-09 1982-09-14 Toshiba Corp Production of panel type heat radiatior
EP0165179A1 (fr) * 1984-04-19 1985-12-18 Vicarb Echangeurs de chaleur à plaques et nouveau type de plaques permettant l'obtention de tels échangeurs
DE4031436A1 (de) * 1990-10-04 1992-04-09 Bavaria Anlagenbau Gmbh Plattenwaermetauscher-modul

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959401A (en) * 1957-11-27 1960-11-08 Modine Mfg Co Plate-fin type heat exchanger and method of making the same
US3274672A (en) * 1963-06-04 1966-09-27 Air Preheater Method of making a heat exchanger
FR2317617A1 (fr) * 1975-07-11 1977-02-04 Alusuisse Echangeur thermique en feuilles minces
FR2318398A1 (fr) * 1975-07-18 1977-02-11 Munters Ab Carl Procede de realisation d'un corps d'echange de chaleur pour des echangeurs a recuperation
FR2392349A1 (fr) * 1977-05-27 1978-12-22 Pfaudler Werke Ag Echangeur de chaleur emaille
JPS57149083A (en) * 1981-03-09 1982-09-14 Toshiba Corp Production of panel type heat radiatior
EP0165179A1 (fr) * 1984-04-19 1985-12-18 Vicarb Echangeurs de chaleur à plaques et nouveau type de plaques permettant l'obtention de tels échangeurs
DE4031436A1 (de) * 1990-10-04 1992-04-09 Bavaria Anlagenbau Gmbh Plattenwaermetauscher-modul

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 253 (M-178)11 December 1982 & JP-A-57 149 083 14 September 1982 *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6460614B1 (en) 1997-12-02 2002-10-08 De Dietrich Process Systems Substantially flat enamelled metal heat exchanger
GB2361991A (en) * 2000-03-10 2001-11-07 Smiths Group Plc A Heat Recovery Unit
FR2806469A1 (fr) * 2000-03-20 2001-09-21 Packinox Sa PROCEDE d4ASSEMBLAGE DES PLAQUES D'UN FAISCEAU DE PLAQUES ET FAISCEAU DE PLAQUES REALISE PAR UN TEL PROCEDE
WO2001071268A1 (fr) * 2000-03-20 2001-09-27 Packinox Procede d'assemblage des plaques d'un faisceau de plaques et faisceau de plaques realise par un tel procede
US6802365B2 (en) 2000-03-20 2004-10-12 Packinox Method for assembling the plates of a plate pack and resulting plate pack
EP1323998A2 (fr) * 2001-12-27 2003-07-02 Xenesys Inc. Unité d'échange de chaleur
EP1323998A3 (fr) * 2001-12-27 2006-07-05 Xenesys Inc. Unité d'échange de chaleur
EP1555500A2 (fr) * 2004-01-13 2005-07-20 Econ Export + Consulting Group GmbH Echangeur de chaleur
EP1555500A3 (fr) * 2004-01-13 2007-03-28 Econ Export + Consulting Group GmbH Echangeur de chaleur
US10054374B2 (en) 2008-07-09 2018-08-21 Euro-Apex B.V. Heat transfer cell for heat exchanger and assembly, and methods of fabricating the same
WO2010076477A1 (fr) * 2008-12-15 2010-07-08 Vitherm Échangeur thermique a plaques soudées
US9134073B2 (en) 2008-12-15 2015-09-15 Vitherm Heat exchanger with welded plates
FR2939879A1 (fr) * 2008-12-15 2010-06-18 Vitherm Echangeur thermique a plaques soudees
WO2013189587A1 (fr) * 2012-06-18 2013-12-27 Api Schmidt-Bretten Gmbh & Co. Kg Échangeur de chaleur à plaques
WO2014085874A3 (fr) * 2012-12-05 2014-09-12 Polyvision, Naamloze Vennootschap Échangeurs de chaleur
BE1021647B1 (nl) * 2012-12-05 2015-12-22 Polyvision, Naamloze Vennootschap Warmtewisselaars
US10094621B2 (en) 2012-12-05 2018-10-09 Polyvision, Naamloze Vennootschap Spiral or helical counterflow heat exchanger
CN111433551A (zh) * 2017-12-05 2020-07-17 舒瑞普国际股份公司 热交换器
CN111433551B (zh) * 2017-12-05 2022-01-21 舒瑞普国际股份公司 热交换器
US11867469B2 (en) 2017-12-05 2024-01-09 Swep International Ab Heat exchanger
KR102552970B1 (ko) * 2023-01-09 2023-07-10 이형규 현열교환기

Also Published As

Publication number Publication date
NL9200698A (nl) 1993-11-16
JPH0611290A (ja) 1994-01-21

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