EP2021720B1 - Echangeur de chaleur a plaques d'echange soudees - Google Patents

Echangeur de chaleur a plaques d'echange soudees Download PDF

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Publication number
EP2021720B1
EP2021720B1 EP07731433A EP07731433A EP2021720B1 EP 2021720 B1 EP2021720 B1 EP 2021720B1 EP 07731433 A EP07731433 A EP 07731433A EP 07731433 A EP07731433 A EP 07731433A EP 2021720 B1 EP2021720 B1 EP 2021720B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
plates
heat
weld
welded
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.)
Active
Application number
EP07731433A
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German (de)
English (en)
French (fr)
Other versions
EP2021720A1 (fr
Inventor
Jean-Noël FERNANDEZ
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.)
Carbone Lorraine Equipements Genie Chimique SAS
Original Assignee
Carbone Lorraine Equipements Genie Chimique SAS
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 Carbone Lorraine Equipements Genie Chimique SAS filed Critical Carbone Lorraine Equipements Genie Chimique SAS
Priority to PL07731433T priority Critical patent/PL2021720T3/pl
Publication of EP2021720A1 publication Critical patent/EP2021720A1/fr
Application granted granted Critical
Publication of EP2021720B1 publication Critical patent/EP2021720B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding

Definitions

  • the present invention relates to a heat exchanger with welded exchange plates, for carrying out a heat exchange between a first fluid and a second fluid.
  • the European patent N ° EP 0639258 B1 offers a solution that eliminates the differential expansion constraints, between the exchange block consisting of all the stacked plates, on the one hand, and the frame on the other hand, this thanks to "angle gutters" which are integral with the aforementioned connecting walls, and which partially surround the amounts of the frame, with the possibility of relative sliding.
  • the heat exchanger according to European Patent No. EP 0639258 B1 has advantageous characteristics, in terms of temperature behavior, with respect to prior art constructions also known of welded plate heat exchangers, such as those described in the European patent applications EP 0165179 A and EP 0186592 A .
  • the exchange plates tend to expand along their length, in a direction perpendicular to the connecting walls at their ends.
  • the corresponding expansion stress is calculated by the F / S ratio, where F is the expansion force and S is the section of the weld supporting this stress.
  • the present invention therefore aims to provide improvements to the heat exchanger plate welded, as described in European Patent No. EP 0639258 B1 , in order to improve its temperature behavior, and in particular to avoid the risk of rupture under the effect of expansion stresses.
  • the subject of the invention is essentially a heat exchanger with welded exchange plates, of the kind previously considered, that is to say comprising metal plates that have been previously stamped, assembled two by two by welding on two sides. opposed to form stacked modular elements defining two independent circuits respectively for a first fluid and a second fluid, the ends of the plates being welded by docking on the edge of lights arranged in opposite connecting walls, perpendicular to said plates, to form a exchange block generally parallelepipedic, which is assembled to four posts or corner uprights belonging to the frame of the heat exchanger, this exchanger being characterized in that, on their sides to assemble, the two stamped metal plates constituting each modular element are on each side applied flat one cont re the other on a predefined width, are joined to one another by a first weld made in this width and ensuring the mechanical strength of the assembly, and are also joined to each other along their outer edges, by a second weld ensuring sealing.
  • the invention replaces the usual "edge-to-edge” assembly of the two stamped plates by a particular configuration, consisting of “jogging" of one or both plates, so that the two plates are juxtaposed on a predefined width, preferably at least equal to fifteen millimeters, allowing the realization of a double weld.
  • the first weld which is a spot weld or a laser weld or a weld at the wheel, ensures the mechanical strength of the assembly, that is to say its resistance to pressure.
  • the second weld which is advantageously a "TIG” or “plasma” type of welding, simply ensures the seal. The total weld section is thus greatly increased, making the assembly of the plates much more resistant.
  • each post or corner post of the welded plate heat exchanger frame has a chamfered inner edge, the adjacent connecting wall connecting to the post or corner post in the region of this chamfered edge.
  • the exchange plates tend to expand, they can carry with them the connecting walls which then comprise a possibility of additional deformation, bending in the space released by the chamfered edges of posts or corner posts.
  • the expansion stress is absorbed largely by the bending, now made possible, of the connecting wall.
  • each connecting wall comprises, in its two lateral zones, bellows conformations for its connection to the post or corner post, in the region of the chamfered edge.
  • the bellows conformations which may each consist simply of two inverted folds together forming a kind of sinusoidal wave, facilitate, if necessary, an expansion along an axis perpendicular to the direction of the longitudinal expansion of the exchange plates.
  • the chamfered edges of the columns or uprights provide a free space used here not only for the bending of the connecting walls, but also for the housing and the deformation of the bellows conformations.
  • a heat exchanger with welded exchange plates comprises a series of modular elements 2 of generally square or rectangular shape, which are stacked and all assembled between two opposite connecting walls 3, of rectangular shape, perpendicular to the modular elements 2 .
  • These modular elements 2 have a very elongated section, and their ends are welded, by docking, on the edges of parallel lights 4 arranged in the connecting walls 3.
  • connecting walls 3 are themselves assembled, along their longitudinal edges (here vertical), posts or corner posts 5, four in number.
  • the lower and upper ends of the posts or corner posts 5 are assembled, respectively, to a lower base and an upper base, not shown on the figure 1 , to constitute a complete frame, of parallelepipedic general shape.
  • each modular element 2 results from the assembly, on two opposite sides, of two metal plates 6 and 7 previously stamped, for at least one of them.
  • the figure 2 illustrates the current mode of assembly of the two plates 6 and 7, on one side (the other side being made symmetrically).
  • the two plates 6 and 7 are each folded at 45 °, one in the direction of the other, and a single longitudinal weld 8, type "TIG", joins these two plates 6 and 7 along their edges, brought against each other.
  • the welded connection of the end thereof to the connecting wall is, in the illustrated example (for plates with a thickness of 1.5 mm ), on a section of 2 x 2.8 mm x 1.5 mm, or 8.4 mm 2 , and this welded assembly has a peak stress concentration at the longitudinal weld 8.
  • the figure 3 illustrates the solution proposed here by the present invention.
  • One of the plates 6 remains here plane in the region of the side of the modular element 2, while the other plate 7 is made with a "soyage" that is to say it has a first fold 9 , for example at 45 °, followed by a second fold 10 for example at 45 ° but in the opposite direction of the preceding one, leading to the formation of a lateral strip 11 of width L, parallel to the main plane of the plate 7 considered .
  • the plate 7 is applied flat against the lateral region of the plate 6.
  • the two plates 6 and 7 are then joined to one another, in the width L, by a first welding 12 which may be a spot weld or a laser weld or a weld at the wheel, ensuring the mechanical strength of the assembly.
  • the two plates 6 and 7 are also joined to each other, along their outer edges, by a second weld 13 which is in particular a type of "TIG” welding, by which ensures simply sealing.
  • the two plates 6 and 7 are thus juxtaposed in the lateral region of the modular element 2, over a width L equal to at least fifteen millimeters.
  • the figure 4 represents, in horizontal section, one of the corner zones of a heat exchanger, showing a modular element portion 2 assembled to a connecting wall 3, and a post or corner post 5 belonging to the frame of the exchanger. More particularly, this figure 4 illustrates the current mode of connection between the connecting wall 3 and the post or corner post 5, the latter having a usual square section.
  • the connection has a rigidity at the two points P1 and P2, rigidity which opposes the free longitudinal expansion of the exchange plates, according to the arrow F.
  • the figure 5 illustrates the solution proposed here by the present invention. This consists in chamfering the inner edge of the post or corner post 5. More particularly, a 45 ° cut is made of the two adjacent faces 14 and 15 of the post or post 5, with a width of at least ten millimeters, so as to form a chamfer 16 which itself gives off a free space 17 of triangular section.
  • the connecting wall 3 is connected to the post or corner post 5, in each zone lateral, by a bellows conformation, resulting from two inverted folds 18 and 19, giving locally to this wall 3 (seen in horizontal section) a sinusoidal wave pattern.
  • This bellows conformation introduces a zone of additional flexibility, facilitating, if necessary, expansion of the exchange block along an axis perpendicular to the direction of the arrow F.
  • each connecting wall 3 has, at its base, a portion 21 devoid of lights 4 and folded horizontally above the lower base 20, on which it is fixed. On the portion 21 is formed a longitudinal fold 22 which absorbs the expansion at this location.
  • a longitudinal fold 22 which absorbs the expansion at this location.
  • the heat exchanger can be made with stamped plates provided with an array of bosses or bowls, or with stamped plates having parallel ribs or grooves, or with smooth plates provided with studs reported, according to all configurations known per se.
  • These exchange plates may consist of simple sheets, for example stainless steel.
  • it may also be so-called “sandwich” sheets, made on one side by a stainless steel support layer, of sufficient thickness to ensure the term pressure, and on the other side by a metal layer or noble alloy, thin, especially based on nickel, tantalum or zirconium.
  • the provisions of the present invention are particularly suitable for assembling such "sandwich" sheets together.
  • Heat exchangers with welded exchange plates made in accordance with the invention can find industrial applications in various fields: chemical and pharmaceutical industry, food industry, heating installations, etc.

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)
  • Separation By Low-Temperature Treatments (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
EP07731433A 2006-05-12 2007-05-10 Echangeur de chaleur a plaques d'echange soudees Active EP2021720B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07731433T PL2021720T3 (pl) 2006-05-12 2007-05-10 Wymiennik ciepła z przyspawanymi płytami wymiany ciepła

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0604244A FR2901016B1 (fr) 2006-05-12 2006-05-12 Echangeur de chaleur a plaques d'echange soudees
PCT/FR2007/000792 WO2007132083A1 (fr) 2006-05-12 2007-05-10 Echangeur de chaleur a plaques d'echange soudees

Publications (2)

Publication Number Publication Date
EP2021720A1 EP2021720A1 (fr) 2009-02-11
EP2021720B1 true EP2021720B1 (fr) 2009-09-23

Family

ID=37607365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07731433A Active EP2021720B1 (fr) 2006-05-12 2007-05-10 Echangeur de chaleur a plaques d'echange soudees

Country Status (14)

Country Link
US (1) US20100132929A1 (ja)
EP (1) EP2021720B1 (ja)
JP (1) JP5313131B2 (ja)
KR (1) KR101344827B1 (ja)
CN (1) CN101443619B (ja)
AT (1) ATE443839T1 (ja)
BR (1) BRPI0712792A2 (ja)
DE (1) DE602007002565D1 (ja)
DK (1) DK2021720T3 (ja)
ES (1) ES2334285T3 (ja)
FR (1) FR2901016B1 (ja)
PL (1) PL2021720T3 (ja)
PT (1) PT2021720E (ja)
WO (1) WO2007132083A1 (ja)

Families Citing this family (8)

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SE535209C2 (sv) * 2010-06-15 2012-05-22 Alfa Laval Corp Ab Korrosionsbeständig plattvärmeväxlare med tantalhaltig beläggning
SE534915C2 (sv) * 2010-06-18 2012-02-14 Alfa Laval Corp Ab Plattvärmeväxlare och metod för tillverkning av en plattvärmeväxlare
US9903663B2 (en) * 2013-11-12 2018-02-27 Trane International Inc. Brazed heat exchanger with fluid flow to serially exchange heat with different refrigerant circuits
US10379582B2 (en) 2014-02-18 2019-08-13 Forced Physics Llc Assembly and method for cooling
CN105834652B (zh) * 2016-05-30 2018-07-10 兰州兰石集团有限公司 板对激光焊固定及气体保护工装
CN106152818A (zh) * 2016-06-30 2016-11-23 广州捷玛换热设备有限公司 换热片及其制作工艺
FR3086742B1 (fr) 2018-10-01 2020-10-30 Heurtey Petrochem S A Plaque pour un echangeur de chaleur a plaques
CN109489453B (zh) * 2018-12-11 2023-12-19 河南龙成煤高效技术应用有限公司 换热单元、换热器及换热设备

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Also Published As

Publication number Publication date
JP5313131B2 (ja) 2013-10-09
US20100132929A1 (en) 2010-06-03
KR20090016581A (ko) 2009-02-16
DE602007002565D1 (de) 2009-11-05
ATE443839T1 (de) 2009-10-15
BRPI0712792A2 (pt) 2012-09-11
FR2901016A1 (fr) 2007-11-16
JP2009537006A (ja) 2009-10-22
ES2334285T3 (es) 2010-03-08
KR101344827B1 (ko) 2013-12-26
DK2021720T3 (da) 2010-02-01
WO2007132083A1 (fr) 2007-11-22
CN101443619A (zh) 2009-05-27
PT2021720E (pt) 2010-01-04
CN101443619B (zh) 2010-12-08
FR2901016B1 (fr) 2008-07-18
PL2021720T3 (pl) 2010-07-30
EP2021720A1 (fr) 2009-02-11

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