EP2299227A2 - Echangeur thermique tubulaire - Google Patents

Echangeur thermique tubulaire Download PDF

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Publication number
EP2299227A2
EP2299227A2 EP10171888A EP10171888A EP2299227A2 EP 2299227 A2 EP2299227 A2 EP 2299227A2 EP 10171888 A EP10171888 A EP 10171888A EP 10171888 A EP10171888 A EP 10171888A EP 2299227 A2 EP2299227 A2 EP 2299227A2
Authority
EP
European Patent Office
Prior art keywords
tube
heat exchanger
tubular heat
product
swirls
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.)
Granted
Application number
EP10171888A
Other languages
German (de)
English (en)
Other versions
EP2299227B1 (fr
EP2299227A3 (fr
Inventor
Roland Feilner
Jörg Zacharias
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.)
Krones AG
Original Assignee
Krones AG
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 Krones AG filed Critical Krones AG
Priority to PL10171888T priority Critical patent/PL2299227T3/pl
Publication of EP2299227A2 publication Critical patent/EP2299227A2/fr
Publication of EP2299227A3 publication Critical patent/EP2299227A3/fr
Application granted granted Critical
Publication of EP2299227B1 publication Critical patent/EP2299227B1/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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
    • F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/424—Means comprising outside portions integral with inside portions
    • F28F1/426—Means comprising outside portions integral with inside portions the outside portions and the inside portions forming parts of complementary shape, e.g. concave and convex
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • 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
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers

Definitions

  • the invention relates to a tubular heat exchanger of the type specified in the preamble of claim 1 and an inner and / or jacket tube of such a tubular heat exchanger.
  • Out DE 600 19 635 T2 is a tube heat exchanger for the treatment of juices with fibers and / or particles known in which simply twisted inner and / or outer tubes are used.
  • the helix angle is shown at about 45 °, while the helix angle in the jacket tube at about 75 °, in each case based on the tube axis, is shown.
  • this tubular heat exchanger it is disadvantageous that, in order to increase the heat transfer, it is necessary to accept very high pressure loss with a constant flow area and the boundary layer of the flow is excited to strong rotation at the swirlings extending at the same helix angle to the pipe axis. This requires very high, possibly for the product disadvantageous, delivery pressure for the treatment of the product in the tubular heat exchanger.
  • Out DE 102 56 232 B4 is a tube heat exchanger for UHT treatment of milk and dairy for sterilization known.
  • the jacket tube is a smooth tube.
  • Only the inner tubes may be thoroughdrallrohre, in which the multi-course mutually opposing swirls intersect at angles between 25 ° and 35 ° along the tube axis, ie with helix angles between 65 ° and 55 °.
  • This angle range is specially adapted to milk and milk products, which are very prone to build up on the contacted surface. Therefore, the swirls are additionally electrochemically polished.
  • the combination of the two measures results in an optimal inhibition of the buildup of milk and milk products and thus in long life of the tube heat exchanger up to a required cleaning cycle.
  • helix angles of 45 which are to be regarded as optimal in terms of heat transfer, but which lead to milk and milk products to an inadmissibly strong formation of deposits.
  • Angle of attack between 25 ° and 35 ° and the additional surface treatment are therefore an optimum for milk and milk products in terms of inhibiting the product-specific formation of deposits, however, as well as the usual helix angle of 45 ° to the tube axis, an unfavorable Relationship between the achieved increase in the heat transfer and an excessive increase in the pressure drop in the flow.
  • the invention has for its object to provide a tubular heat exchanger of the type mentioned above and a shell and / or inner tube for such a tubular heat exchanger, the optimal short in the processing of particular juices or juicy food products with low, medium or high viscosity despite only moderate delivery pressure Allow residence times and small heat exchanger surfaces. This applies to all liquid foods of this viscosity range.
  • the tube heat exchanger requires a relatively small heat exchanger surface and thus short conveyor line due to the use of such Buchdrallrohren.
  • the propensity for product batch formation is of secondary importance in juices and juice-like food products, since when using cross-twist tubes with the indicated shallow helix angles it is primarily important that pulp, fibers or particles as constituents of the juices or juicy-type food products are not used because of the shallow helix angles Suspending and collecting tend, but quickly washed away. Furthermore, such a cleaning up to a hygienic condition is possible.
  • each swirl in the axial section of the tube has a trough-like depression with mutual, approximately wedge-shaped ribs in cross section, between which a swirl depth between approximately 0.8 mm to 1.2 mm exists in the depression.
  • the interaction between the relatively shallow helix angles and the moderate swirl depth results even in moderate delivery pressure in one for juices and juicy Food products of low, medium and high viscosities optimum ratio between the increase in heat transfer and the resulting increase in pressure loss.
  • the recesses and the ribs are located on the product-contactable surface.
  • the width seen in the direction of the tube axis in the depression is a multiple of the twist depth. It should be between about 5.0 and 20.0 mm.
  • the depressions are relatively wide depressions, at the limiting ribs components of the product are rapidly flushed, and also a hygienic cleaning, e.g. for a product change.
  • both multistage swirls cover the entire surface of the pipe surface.
  • the jacket tube forms a module of the tube heat exchanger as Buchdrallrohr with multiple cross-spiral inner tubes.
  • This module may conveniently extend over 3.0, 6.0 m or more, and is conveniently combined in series to treat the product in the multi-module tubular heat exchanger.
  • only the inner tubes are tantallrohre with the relatively shallow helix angles, for example, if a heat transfer medium is used in the flow channel between the jacket tube and the inner tubes.
  • the jacket tube has the depressions of the two swirls on the inside of the tube, while the respective cross-spiral inner tube has the depressions of the swirls on the outside or the inside, for example, depending on which pipe surface the product flows along.
  • the tube heat exchanger is particularly well suited for the treatment of juices or juice-like food products with viscosities> about 5 mPas.
  • two different methods are available, either a recuperative process in which product is separated from product by the respective cross-twist tube, for example in countercurrent, or a process with a heat transfer medium against the product separated by the respective cross-twist tube, wherein then, preferably, the recesses of the two swirls of the funneldrallrohres facing the product.
  • the used swirls on the inner and outer tube surfaces in the flows are effective.
  • module M of a tubular heat exchanger W for the thermal treatment of juices or juicy food products with medium to high viscosities, for example, a viscosity of more than about 5 mPas consists of a jacket tube 1 and at least one inside the jacket tube 1 at a distance from the inner wall of the jacket tube
  • the module M is combined in the tube heat exchanger W, for example, with other, similar or similar modules not shown, to form a treatment section of a certain conveying length.
  • the product is treated either by a recuperative process, ie product by product separated by, for example, the inner tube 2, or by a method in which a heat transfer medium (steam or water) is used, the heat transfer medium is separated from the product by, for example, the respective Inner tube 2.
  • the respective method is, preferably, operated in countercurrent or in direct current.
  • Fig. 1 is designed as a cross-twist tube with substantially mutually symmetrical to the tube axis X crossing,
  • D1, D2 wherein the angle ⁇ to the tube axis X between 67 ° and 72 ° and the resulting twist angle ⁇ to 18 ° to 23 ° perpendicular to the tube axis
  • the funneldrallrohr for example similar to that in Fig. 4 shown formed with pointing to the tube interior recesses 3.
  • Fig. 1 is the respective inner tube 2 either a smooth tube or also a funneldrallrohr with substantially mutually symmetrical to the tube axis X crossing multi-speed swirls and helix angles ⁇ 1 between 18 ° and 23 °.
  • the jacket tube 1 is a smooth tube.
  • each inner tube 2 contained in the jacket tube 1 is a Buchdrallrohr with each other substantially symmetrical to the tube axis X intersecting,
  • the swirls D1, D2 are more common, so despite the relatively steep angle of attack ⁇ 1 (twist angle ⁇ 1 between 18 ° and 23 °) the entire pipe surface offers the product mainly the heat transfer intensifying macrostructures, and is achieved between the increase in heat transfer and the pressure loss caused by the swirls an optimum.
  • Fig. 4 illustrates the macrostructures formed by the intersecting swirls D1, D2 of the respective cross-twist tube as the shell and / or inner tube 1, 2, which are present on the inside and the outside of the tube.
  • Fig. 4 lie the tube axis X facing in the axial direction successively trough-like depressions 3, which are each bounded by substantially wedge-shaped ribs 5 and have a twist depth T between 0.8 mm and 1.2 mm.
  • the width B of each recess 3 is a multiple of the twist depth T, preferably between 5.0 mm and 20.0 mm.
  • a rounded tip 4 is provided corresponding to the recess 3, which is bounded in the axial direction by approximately V-shaped grooves 6.
  • Ribs 5 and the grooves 6 be rounded, for example, in terms of a good cleanability of the tube.
  • the ribs 5 and the grooves 6 extend as well as the depressions 3 and the studs 4 at the angle of attack ⁇ , ⁇ 1 helical and periodically crossing each other over the entire inner or outer pipe surface.
  • FIG. 5 is a funneldrallrohr as a jacket or inner tube 1, 2 indicated, in which the recesses 3 on the outside of the tube (ie the tube axis X facing away) are present.
  • the twist depth T is between 0.8 mm and 1.2 mm.
  • the helix angles ⁇ , ⁇ 1 are between 18 ° and 23 ° to the tube axis X.
  • the in Fig. 5 shown cross-twist tube can be suitably used as the inner tube 2, if, for example, the product between the casing tube, according to Fig. 4 is designed, and the outside of the inner tube 2 flows. If a heat transfer medium is used, which flows in the flow channel between the jacket tube 1 and each inner tube 2, the cross-twist tube of the inner tube 1, 2 is expediently analogous to Fig. 4 educated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP10171888.0A 2009-09-08 2010-08-04 Echangeur thermique tubulaire Active EP2299227B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10171888T PL2299227T3 (pl) 2009-09-08 2010-08-04 Rurowy wymiennik ciepła

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009040558A DE102009040558A1 (de) 2009-09-08 2009-09-08 Röhrenwärmetauscher

Publications (3)

Publication Number Publication Date
EP2299227A2 true EP2299227A2 (fr) 2011-03-23
EP2299227A3 EP2299227A3 (fr) 2016-12-07
EP2299227B1 EP2299227B1 (fr) 2018-09-19

Family

ID=43242416

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10171888.0A Active EP2299227B1 (fr) 2009-09-08 2010-08-04 Echangeur thermique tubulaire

Country Status (8)

Country Link
US (1) US20110056663A1 (fr)
EP (1) EP2299227B1 (fr)
CN (1) CN102012177A (fr)
BR (1) BRPI1003318A2 (fr)
DE (1) DE102009040558A1 (fr)
ES (1) ES2691257T3 (fr)
HU (1) HUE041374T2 (fr)
PL (1) PL2299227T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011006653A1 (de) 2011-04-01 2012-10-04 Krones Aktiengesellschaft Getränkeerhitzungssystem mit integrierter Verbrennungsanlage und Verfahren zum Erhitzen von Getränken
RU2548332C1 (ru) * 2013-10-08 2015-04-20 Николай Григорьевич Гладков Теплообменник
CN104713405B (zh) * 2015-03-04 2016-08-17 东南大学 一种正三角形排列的对涡排阵列换热装置
RU2622340C1 (ru) * 2016-07-15 2017-06-14 Федеральное государственное бюджетное образовательное учреждение высшего образования "Юго-Западный государственный университет" (ЮЗГУ) Вихревой теплообменный элемент
RU2672229C1 (ru) * 2017-10-17 2018-11-12 Федеральное государственное бюджетное образовательное учреждение высшего образования " Юго-Западный государственный университет" (ЮЗГУ) Вихревой теплообменный элемент

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10256232B4 (de) 2002-12-02 2004-10-21 Tuchenhagen Dairy Systems Gmbh Vorrichtung zur Verlängerung der Standzeit von Rohrbündel-Wärmeaustauschern in indirekt beheizten UHT-Anlagen für Nahrungsmittel
DE60019635T2 (de) 1999-10-26 2006-03-02 Tetra Laval Holdings & Finance S.A. Rohrwärmetauscher-anordnung

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Publication number Priority date Publication date Assignee Title
DE60019635T2 (de) 1999-10-26 2006-03-02 Tetra Laval Holdings & Finance S.A. Rohrwärmetauscher-anordnung
DE10256232B4 (de) 2002-12-02 2004-10-21 Tuchenhagen Dairy Systems Gmbh Vorrichtung zur Verlängerung der Standzeit von Rohrbündel-Wärmeaustauschern in indirekt beheizten UHT-Anlagen für Nahrungsmittel

Also Published As

Publication number Publication date
HUE041374T2 (hu) 2019-05-28
PL2299227T3 (pl) 2019-06-28
EP2299227B1 (fr) 2018-09-19
US20110056663A1 (en) 2011-03-10
ES2691257T3 (es) 2018-11-26
CN102012177A (zh) 2011-04-13
BRPI1003318A2 (pt) 2012-05-29
EP2299227A3 (fr) 2016-12-07
DE102009040558A1 (de) 2011-03-10

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