EP4036511B1 - Wärmetauscher mit platten - Google Patents

Wärmetauscher mit platten Download PDF

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Publication number
EP4036511B1
EP4036511B1 EP22153846.5A EP22153846A EP4036511B1 EP 4036511 B1 EP4036511 B1 EP 4036511B1 EP 22153846 A EP22153846 A EP 22153846A EP 4036511 B1 EP4036511 B1 EP 4036511B1
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EP
European Patent Office
Prior art keywords
plates
fluid
channel
pair
heat exchanger
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
EP22153846.5A
Other languages
English (en)
French (fr)
Other versions
EP4036511A1 (de
EP4036511C0 (de
Inventor
Thomas Labbe
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.)
Marcel Labbe
Original Assignee
Marcel Labbe
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 Marcel Labbe filed Critical Marcel Labbe
Publication of EP4036511A1 publication Critical patent/EP4036511A1/de
Application granted granted Critical
Publication of EP4036511B1 publication Critical patent/EP4036511B1/de
Publication of EP4036511C0 publication Critical patent/EP4036511C0/de
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
    • 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
    • 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
    • F28F3/083—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning capable of being taken apart
    • 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
    • F28F3/14—Elements constructed in the shape of a hollow panel, e.g. with channels by separating portions of a pair of joined sheets to form channels, e.g. by inflation
    • 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
    • F28F9/007—Auxiliary supports for elements
    • F28F9/0075—Supports for plates or plate assemblies
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0042—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for foodstuffs
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0098—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for viscous or semi-liquid materials, e.g. for processing sludge
    • 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
    • F28F2240/00—Spacing 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
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding
    • F28F2275/067—Fastening; Joining by welding by laser welding
    • 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
    • F28F2275/20—Fastening; Joining with threaded elements
    • F28F2275/205—Fastening; Joining with threaded elements with of tie-rods

Definitions

  • the present invention relates to a plate heat exchanger. More particularly, it relates to a plate heat exchanger as defined by the preamble of claim 1, and as disclosed by the document WO 2018/046451 A .
  • a type of heat exchanger called a plate exchanger. It is made up of a large number of plates arranged parallel to each other and separated from each other by a small space where fluids circulate. To avoid leaks, the plates are assembled together by welding, brazing or using joints.
  • first longitudinal channels for a first fluid such as hot water
  • second transverse channels for a second fluid such as the viscous fluid to be heated
  • the solution usually adopted is to increase the thickness of the support plates, up to more than ten centimeters.
  • the invention relates to a plate heat exchanger according to claim 1.
  • the two plates of each pair are welded so that said at least one first channel bypasses a drilling zone of said central tie rod.
  • the two plates of each pair are further welded so as to define tabs via which the plates of two pairs are welded.
  • the weld forming an interior edge of said tabs is interrupted so as to form openings of the first channel.
  • the slabs have thicknesses of less than 5 cm, or even less than 4 cm.
  • the invention relates to an architecture of a plate heat exchanger 1, mainly comprising a plurality of pairs of substantially flat plates 10, 11 arranged one on top of the other. These are typically metal sheets “as is”, with a thickness of the order of one to a few millimeters, for example 1.5 mm, welded together as we will see, and usually deformed by twisting or swelling.
  • the architecture complies with figures 1a , 1b is particularly preferred, but not at all limiting.
  • This heat exchanger 1 is for the heat exchange between a first fluid which is in particular a fluid providing heat and preferably not very viscous, for example hot water; and a second fluid which is in particular a fluid to be heated and preferably viscous, for example sugar cane or vinasse (residue from the distillation of alcoholic liquids).
  • first fluid which is in particular a fluid providing heat and preferably not very viscous, for example hot water
  • second fluid which is in particular a fluid to be heated and preferably viscous, for example sugar cane or vinasse (residue from the distillation of alcoholic liquids).
  • first fluid which is in particular a fluid providing heat and preferably not very viscous, for example hot water
  • a second fluid which is in particular a fluid to be heated and preferably viscous, for example sugar cane or vinasse (residue from the distillation of alcoholic liquids).
  • first and second fluid which is in particular a fluid providing heat and preferably not very viscous, for example
  • each plate 10a, 11a, 10b, 11b is in contact with two adjacent plates, the other plate of its pair and a plate of another pair.
  • the plates 10a, 11a, 10b, 11b are arranged such that the first fluid flows between the two plates 10a, 11a, 10b, 11b of each pair (in first channels which will be noted 20a, 20b) and the second fluid flows between the pairs of plates 10a, 11a, 10b, 11b (in second channels which will be denoted 21).
  • first channels which will be noted 20a, 20b
  • second channels which will be denoted 21
  • the heat exchanger 1 comprises two slabs 2, 3 enclosing all the plates 10a, 11a, 10b, 11b (in a “sandwich”), including an upper slab 2 (visible on the figure 1b ) and a lower slab 3.
  • slabs 2, 3 only have a structural function and no thermal function (they are not in contact with either the first fluid or the second fluid).
  • the present slabs do not need to be as massive as in the prior art, and they may have (including for slab sizes 2, 3 of several square meters), thicknesses of less than 5 cm, even less than 4 cm, advantageously around 2.5 cm.
  • the slabs 2, 3 are fixed to each other by a plurality of tie rods 5a, 5b.
  • the tie rods are always long bars extending over the entire height of the exchanger 1, i.e. the thickness of all the plates 10a, 10b, 11a, 11c, generally threaded at least at their ends and of a diameter generally around 2 to 4 cm.
  • the exchanger is distinguished in that at least one tie rod 5b called central tie rod pierces the plates 10a, 11a, 10b, 11b (preferably all the plates), as shown for example [ Fig. 2 ] which will be described in more detail later. More precisely, we advantageously still have peripheral tie rods 5a which do not pierce the plates 10a, 11a, 10b, 11b, but we also have at least one “central” tie rod. In the example of the figure 1b we have six central tie rods 5b.
  • the central tie rod(s) pierce at least one channel 20a, 20b, 21 between two consecutive plates 10a, 11a, 10b, 11b, preferably all the second channels 21, and even more preferably no first channel 20a , 20b, i.e. is directly in contact with at least the second fluid.
  • the two plates 10, 11 of a pair, arranged one on top of the other (i.e. stacked), are welded to one another in particular by means of laser welding.
  • this weld advantageously defines at least a first channel 20 extending between said plates 10, 11.
  • the inlet and outlet can be on the same edge as is particularly the case in the architecture of figures 1a And 1b , but also on opposite edges (see the figure 3b which will be described later).
  • said edges are the longitudinal edges (ie the edges at the longitudinal ends, which extend in the transverse direction).
  • channel we mean any element capable of conducting the fluid between the plates 10, 11 of a pair from the inlet to the outlet. It will be understood that those skilled in the art will be able to define any channel geometry of their choice by means of laser welding; we will see examples later.
  • the channel(s) may be of any shape.
  • the welding can include a “stitching”, that is to say local welds (in particular welding points) distributed over the entire surface of the plates 10, 11 to connect the latter.
  • a switching that is to say local welds (in particular welding points) distributed over the entire surface of the plates 10, 11 to connect the latter.
  • a gaseous fluid such as steam hot, the fluid does not in fact have a predetermined path and will be distributed randomly throughout the space available to it.
  • each channel is a continuous element of more or less constant section imposing a given path of the fluid between the plates 10, 11.
  • a liquid fluid because controlling the section then makes it possible to control the speed of the fluid and therefore the quantity of heat exchange.
  • the channel(s) 20 snake between the plates 10, 11, in particular to cover a large part of their surface and maximize thermal exchanges.
  • channel(s) 20 pass through the pair of plates 10, 11 in the longitudinal direction, ie extend from one longitudinal edge to the longitudinal edge, but due to the winding it is entirely possible that they locally present a transverse flow direction (as is the case in the example shown) or even longitudinal in the opposite direction, particularly if the exit is on the same edge as the entrance.
  • a third embodiment can combine the first and second embodiment: in the vicinity of the edges there are channels of the type of those of the first embodiment, forming baffles, which open into a central cavity of the type of that of the second mode of achievement.
  • Two pairs of plates 10a, 10b, 11a, 11b can be welded to each other for example via tabs 100, 101, 110, 111 along said opposite edges, as seen for example on the figures 3a And 3b .
  • tabs extremal strips of a predetermined width (in particular a few millimeters to a few centimeters, advantageously around 2 cm), which can also be defined by laser welding of the two plates 10, 11 of the same pair, along which they are folded. Then, the tabs 100, 101, 110, 111 are the parts of the plates 10, 11 beyond the weld which remain “free”, that is to say capable of pivoting around said weld. This weld can therefore be used as a hinge around which the tongues 100, 101, 110, 111 can pivot so as to separate their outer edges. Folded in this way, the tabs 100, 101, 110, 111 form a “bellows”.
  • the tongues 100, 101, 110, 111 may have a predetermined angle relative to the plates 10a, 11a, 10b, 11b of the pair.
  • Said predetermined angle is advantageously between 30° and 60°, even more advantageously between 40° and 50°, and even more advantageously around 45°.
  • a 2 cm tongue allows a gap of 1.1 cm, which allows interpair channels of 1.9 cm apart (for 1.5 mm thick sheets).
  • Each plate 10a, 10b, 11a, 11b thus has two tongues referenced 100a, 101a, 110a, 111a, 100b, 101b, 110b, 111b (they are not all shown in the figures) on its opposite (longitudinal) edges.
  • tabs 100 and 101 are those of the first plate 10
  • the tongues 110 and 111 are those of the second plate 11.
  • the tongues 100 and 110 are “proximal” that is to say at the level of a first longitudinal edge
  • the tongues 101 and 111 are “distal” that is to say at the level of the other longitudinal edge.
  • the tongues 110a, 111a of a second plate 11a of the first pair a can be welded with the tongues 100b, 101b of a first plate 10b of the second pair b.
  • This last welding is advantageously again by laser (even if it could be done using any other conventional technique), and preferably at the level of the outer edges of the tabs so as to form a wide second channel 21 between the first and second pairs, of which we notice that it extends transversely.
  • the laser welding of the two plates 10, 11 of the same pair “defines” the channel(s) 20 and the tabs 100, 101, 110, 111, that is to say it delimits them, and in particular forms the sides of the channels 20 (if there are winding channels) and the inner edge of the tongues 100, 101, 110, 111.
  • laser welding makes it easy and efficient to fuse together the plates 10, 11 along a continuous path, i.e. if there are k channels to constitute k+1 watertight barriers from one (longitudinal) edge to the other.
  • Said weld forming the tabs 100, 101, 110, 111 is preferably interrupted so as to form openings of the channels 20, ie their inputs/outputs, as seen in particular on the figures 3a And 3f , as well as figure 3e which illustrates a section at such an opening.
  • the two plates 10, 11 of each pair are welded so that said at least one first channel 20 bypasses a drilling zone 12 of said central tie rod 5b, called "dead zone" 12 in which the first fluid cannot flow.
  • Dead zone 12 means a closed space which is not in fluid connection with channel 20, hence the fact that channel 20 “circumvents” this zone.
  • a dead zone 12 is created when the weld forms a loop (i.e. follows a continuous closed trajectory passing through the same point).
  • a dead zone 12 is thus separated in a sealed manner from the channels 20, and it is therefore possible to drill there (the interior of a dead zone can also be cut out and removed).
  • the dead zones 12 of several pairs of plates 10a, 10b, 11a, 11b are aligned, we can insert a central tie rod 5b passing through all the pairs of plates 10a, 10b, 11a, 11b.
  • the passage of the central tie rod creates at worst a fluid connection between two channels 21, which is not serious in practice since all the channels of the same type transport the same fluid at substantially the same temperature, but no fluid connection between two channels 20, 21 of different nature, and therefore no risk of “mixing” of the two fluids.
  • THE tie rod 5b even acts as a heat conduction element and increases transfers.
  • each side of the ring 4 is also welded to the two plates. neighboring ones (respectively plates 10b and 11a).
  • the rings 4 thus form “pillars” in the second channels 21 only marginally hindering the flow of the second fluid, and a cylinder receiving the central tie rod 5b.
  • the central tie rod 5b then no longer pierces the second channel 21 (since the channel 21 bypasses the ring 4, and thus its interior volume is “removed” from the channel 21) and is consequently separated in a sealed manner from the second fluid (and from the first fluid as previously explained).
  • the ring 4 can coincide with this drilling zone so as to form for the central tie rod 5b a completely sealed cylinder extending through all the plates 10a, 10b, 11a, 11b .
  • the same sealing as in the prior art while being able to have thin slabs 2, 3 even if the exchanger 1 is extended.
  • the tie rod can directly pierce the first channels 20a, 20b (ie without dead zone 12), creating at worst a fluid connection between them, which again is not serious since all channels of the same type transport the same fluid substantially at the same temperature, but no fluid connection between two channels 20, 21 of different nature, and therefore no risk of “mixing” of the two fluids.

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

Claims (6)

  1. Wärmetauscher (1) mit Platten zwischen einem ersten Fluid und einem zweiten Fluid, umfassend eine Mehrzahl von Plattenpaaren (10a, 11a, 10b, 11b), die im Wesentlichen flach übereinander angeordnet sind, so dass das erste Fluid zwischen den beiden Platten (10a, 11a, 10b, 11b) jedes Paares strömt und das zweite Fluid zwischen den Plattenpaaren (10a, 11a, 10b, 11b) strömt, wobei die beiden Platten (10a, 11a, 10b, 11b) jedes Paares derart verschweißt sind, dass sie mindestens einen ersten Kanal (20a, 20b, 21) für die Zirkulation des ersten Fluids definieren, wobei die Platten (10a, 11a, 10b, 11b) zweier Paare derart verschweißt sind, dass sie mindestens einen zweiten Kanal (21) für die Zirkulation des zweiten Fluids definieren, wobei zwei Abdeckplatten (2, 3), die die Platten (10a, 11a, 10b, 11b) umschließen, durch eine Vielzahl von Zugstangen (5a, 5b) aneinander befestigt sind, wobei mindestens eine Zugstange (5b), die als zentrale Zugstange bezeichnet wird, die Platten (10a, 11a, 10b, 11b) durchdringt, dadurch gekennzeichnet, dass die zentrale Zugstange (5b) den zweiten Kanal (21) durchdringt und mit dem zweiten Fluid in Kontakt steht.
  2. Wärmetauscher (1) nach Anspruch 1, wobei die beiden Platten (10a, 11a, 10b, 11b) jedes Paares derart verschweißt sind, dass der mindestens eine erste Kanal (20a, 20b) eine Durchdringungszone (12) der zentralen Zugstange (5b) umgeht.
  3. Wärmetauscher (1) nach einem der Ansprüche 1 und 2, wobei pro Plattenpaar (10a, 11a, 10b, 11b) ein einziger erster Kanal (20a, 20b) vorhanden ist, wobei die beiden Platten (10a, 11a, 10b, 11b) jedes Paares gemäß einer Reihe von Schweißpunkten verschweißt werden, die über die gesamte Oberfläche der Platten (10a, 11a, 10b, 11b) verteilt sind.
  4. Wärmetauscher (1) nach einem der Ansprüche 1 bis 3, wobei die beiden Platten (10a, 11a, 10b, 11b) jedes Paares ferner derart verschweißt sind, dass sie Zungen (100a, 101a, 110a, 111a, 100b, 101b, 110b, 111b) bilden, über die die Platten (10a, 11a, 10b, 11b) zweier Paare verschweißt werden.
  5. Wärmetauscher (1) nach Anspruch 4, wobei die Schweißnaht, die eine Innenkante der Zungen (100a, 101a, 110a, 111a, 100b, 101b, 110b, 111b) bildet, derart unterbrochen ist, dass sie Öffnungen des ersten Kanals (20a, 20b) bildet.
  6. Wärmetauscher (1) nach einem der vorhergehenden Ansprüche, wobei die Abdeckplatten (2, 3) Dicken von weniger als 5 cm oder sogar weniger als 4 cm aufweisen.
EP22153846.5A 2021-01-29 2022-01-28 Wärmetauscher mit platten Active EP4036511B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2100891A FR3119447B1 (fr) 2021-01-29 2021-01-29 échangeur de chaleur a plaques

Publications (3)

Publication Number Publication Date
EP4036511A1 EP4036511A1 (de) 2022-08-03
EP4036511B1 true EP4036511B1 (de) 2023-09-13
EP4036511C0 EP4036511C0 (de) 2023-09-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22153846.5A Active EP4036511B1 (de) 2021-01-29 2022-01-28 Wärmetauscher mit platten

Country Status (2)

Country Link
EP (1) EP4036511B1 (de)
FR (1) FR3119447B1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2575279B1 (fr) 1984-12-21 1989-07-07 Barriquand Echangeur a plaques
JPS62202997A (ja) * 1986-02-28 1987-09-07 Tsuchiya Mfg Co Ltd 複合式熱交換器
SE9504586D0 (sv) * 1995-12-21 1995-12-21 Tetra Laval Holdings & Finance Plattvärmeväxlare
DE19722074A1 (de) * 1997-05-27 1998-12-03 Knecht Filterwerke Gmbh Plattenwärmetauscher, insbesondere Öl/Kühlmittel-Kühler für Kraftfahrzeuge
SE524176C2 (sv) * 2002-11-01 2004-07-06 Ep Technology Ab Värmeväxlare med förstärkningsorgan
SE1651224A1 (en) * 2016-09-12 2018-03-13 Swep Int Ab Heat exchanger having through hole for fastening of hydro block
FR3079606B1 (fr) 2018-03-30 2020-07-17 Groupe H Labbe Procede d'assemblage d'un echangeur thermique
US11486657B2 (en) * 2018-07-17 2022-11-01 Tranter, Inc. Heat exchanger heat transfer plate

Also Published As

Publication number Publication date
FR3119447B1 (fr) 2023-04-14
EP4036511A1 (de) 2022-08-03
FR3119447A1 (fr) 2022-08-05
EP4036511C0 (de) 2023-09-13

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