WO2017167458A1 - Echangeur de chaleur à spirales - Google Patents

Echangeur de chaleur à spirales Download PDF

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Publication number
WO2017167458A1
WO2017167458A1 PCT/EP2017/025070 EP2017025070W WO2017167458A1 WO 2017167458 A1 WO2017167458 A1 WO 2017167458A1 EP 2017025070 W EP2017025070 W EP 2017025070W WO 2017167458 A1 WO2017167458 A1 WO 2017167458A1
Authority
WO
WIPO (PCT)
Prior art keywords
distributor
heat exchanger
liquid phase
core tube
tube
Prior art date
Application number
PCT/EP2017/025070
Other languages
German (de)
English (en)
Inventor
Manfred Steinbauer
Christiane Kerber
Jürgen Spreemann
Ingomar Blum
Konrad Braun
Martin Stadler
Original Assignee
Linde Aktiengesellschaft
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 Linde Aktiengesellschaft filed Critical Linde Aktiengesellschaft
Publication of WO2017167458A1 publication Critical patent/WO2017167458A1/fr

Links

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
    • 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
    • F28D7/02—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 helically coiled
    • F28D7/024—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 helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/028—Evaporators having distributing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J5/00—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants
    • F25J5/002—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants for continuously recuperating cold, i.e. in a so-called recuperative heat exchanger
    • 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
    • F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the 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
    • F28F25/00—Component parts of trickle coolers
    • F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/02—Details of evaporators
    • F25B2339/024—Evaporators with refrigerant in a vessel in which is situated a heat exchanger
    • F25B2339/0242—Evaporators with refrigerant in a vessel in which is situated a heat exchanger having tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/32—Details on header or distribution passages of heat exchangers, e.g. of reboiler-condenser or plate heat exchangers

Definitions

  • the invention relates to a heat exchanger according to claim 1.
  • Such a heat exchanger is used for indirect heat exchange between at least a first medium, which is guided in a tube bundle of the heat exchanger and a second medium which is guided in a surrounding the tube bundle shell space, by a pressure-bearing jacket of the
  • Heat exchanger is limited.
  • the two-phase entering refrigerant is usually separated in a pre-manifold of the heat exchanger by gravity in a gaseous phase and a liquid phase and then passed the liquid phase in a main manifold and abandoned by this (as a second medium) on the tube bundle ,
  • the liquid phase from the pre-distributor passed through a central core tube of the heat exchanger in the main distributor.
  • the present invention is therefore based on the object of providing a heat exchanger and a corresponding method for distributing a liquid phase, which reduces the problems mentioned above. This object is achieved by a heat exchanger with the features of claim 1.
  • Advantageous embodiments of the invention are specified in the corresponding subclaims.
  • a heat exchanger comprising:
  • a pre-distributor for receiving a liquid phase to be distributed to a tube bundle of the heat exchanger
  • a core tube extended along a longitudinal axis, on which a plurality of tubes is wound, which form the tube bundle
  • a main distributor a plurality of projecting from the core tube
  • Distributor arms for distributing that liquid to the tube bundle, wherein the distributor arms are in fluid communication with the pre-distributor via a flow path in the core tube, so that the liquid phase from the predistributor can be fed via the flow path into distributor arms of the main distributor,
  • a plurality or all of the distributor arms are in fluid communication with the predistributor via at least one downpipe extending along the longitudinal axis, so that the distributing liquid phase can also be fed via the respective downpipe from the distributor in the respective distributor arm.
  • the free cross section for draining the liquid phase can advantageously be increased in such a way that degassing of the liquid phase is possible.
  • the heat exchanger has a jacket extending along the longitudinal axis, which extends coaxially to the core tube, wherein the jacket a
  • Enclosing space surrounds, in which the pre-distributor, the main distributor, the tube bundle and the core tube and the at least one drop tube are arranged.
  • the jacket space further serves to receive the liquid phase (second medium) to be distributed to the tube bundle.
  • the at least one downpipe or the downpipes extend in the radial direction of the jacket in each case further outward than the core tube in the jacket space along the longitudinal axis.
  • the downpipes are therefore arranged in particular around the core tube and run largely or in sections parallel to the core tube or parallel to the longitudinal axis of the jacket.
  • the at least one downpipe or the downpipes each open from above into a roof of the associated distribution arm, wherein the respective roof limits the respective distributor arm upwards.
  • the respective distributor arm starting from the core tube in the radial direction of the jacket outwardly to a the
  • Main distributor extends facing inside of the shell.
  • Heat exchanger provided that between each two adjacent distributor arms, there is a gap through which, for example, tubes of the tube bundle are guided along the longitudinal axis of the shell upwards and then open above the main distributor or above the distribution arms of the main distributor in the jacket provided on the neck.
  • the respective distributor arm has a bottom extending perpendicular to the longitudinal axis with a plurality of outlet openings, via which the liquid phase can be applied to the tube bundle arranged below the respective distributor arm.
  • the respective distributor arm preferably has two lateral walls which extend in the radial direction of the jacket and which each extend upwards from the bottom of the respective distributor arm in the direction of the longitudinal axis of the jacket, the lateral walls of the respective distributor arm pointing in the radial direction of the jacket towards the inside of the jacket diverge, so that the respective distributor arm has a circular sector-shaped or pie-shaped cross-section substantially perpendicular to the longitudinal axis.
  • the respective distributor arm preferably has an end wall connecting the two lateral walls of the respective distributor arm and extending upwards along the longitudinal axis from the bottom of the respective distributor arm, the front wall of the respective distributor arm facing the inside of the jacket in the radial direction of the jacket ,
  • the said roof of the respective distributor arm preferably adjoins the said lateral side walls and the front wall of the respective distributor arm at the top. It is preferably provided that the roof of the respective Verteilerarms in the radial direction of the shell towards the outside, ie towards the inside of the shell down, falls off.
  • a distributor arm a plurality of distributor arms or all distributor arms to be in fluid communication with the predistributor via a plurality of downcomers along the longitudinal axis, so that the liquid phase to be distributed in addition to the flow path in the core tube respective downpipes from the pre-distributor in the respective distributor arm can be fed.
  • the level of the liquid phase in the pre-distributor is above the inlet openings of the downpipes provided in or at the bottom of the pre-distributor, so that the liquid phase in the
  • Tube bundle eliminated with the associated problems during startup.
  • Heat exchanger provided that the pre-distributor has a perpendicular to the longitudinal axis bottom, wherein the bottom has a central opening through which the bottom in flow communication with the surrounding of the core tube
  • Flow path is.
  • Said central opening in the bottom of the pre-distributor is preferably arranged below a baffle plate provided in the pre-distributor.
  • Heat exchanger provided that the pre-distributor is in fluid communication with the respective downpipe via a respective provided in or at the bottom inlet opening of the respective downpipe, wherein the inlet openings are arranged around the central opening.
  • one or more weirs may be provided on the floor of the predistributor or protrude upwards from the floor in the direction of the longitudinal axis, wherein the liquid phase defined on the floor can be stowed by means of the weirs.
  • the individual downpipes can be charged, for example, depending on the level of the liquid phase in the pre-distributor with the liquid phase.
  • the supply of the main distributor for starting the heat exchanger can be optimally adjusted optimally, for example, by different weir heights at the side downpipes and central inlet to the core tube or flow path.
  • Heat exchanger provided that the heat exchanger has a supply line which is in flow connection with the pre-distributor, having an outlet opening which is arranged along the longitudinal axis above the baffle plate (eg in the form of a baffle plate) of the pre-distributor and this particular faces, so that one of Outlet opening of the supply line flowing two-phase mixture hits the baffle plate and flows from this to the bottom of the pre-distributor.
  • the baffle plate eg in the form of a baffle plate
  • Heat exchanger provided that the core tube of the heat exchanger is configured to receive the load of the tubes of the tube bundle. These are preferably helically wound in several layers on the core tube for this purpose. Between the individual pipe layers, spacer webs are preferably provided, which are e.g. can run along the longitudinal axis. For introducing and discharging media, the tubes can be grouped together, which open into provided on the jacket nozzle.
  • a method for distributing a liquid phase to a tube bundle of a heat exchanger according to claim 13 is disclosed. Thereafter, a method for distributing a liquid phase to a tube bundle of a wound heat exchanger is proposed, which uses in particular a heat exchanger according to the invention or herein described, wherein a two-phase mixture having a liquid phase and a gaseous phase is placed in a pre-distributor, so that the two-phase mixture is calmed and outgas at least a portion of the gaseous phase of the two-phase mixture can, wherein the liquid phase is passed via a flow path guided in a core tube of the heat exchanger in a plurality of distributor arms of a main distributor of the heat exchanger and from there to a tube bundle having a plurality of tubes wound on the core tube, and wherein the liquid Phase from the pre-distributor in addition to at least one along a
  • Longitudinally extending downpipe is directed into a distribution arm of the main distributor, wherein the downpipe extends outside of the core tube.
  • Drop pipe are in flow communication with the pre-distributor, wherein the liquid phase to be distributed is also fed via the respective downpipe from the pre-distributor into the respective distributor arm.
  • the pre-distributor with a distributor arm, a plurality of distributor arms or all distributor arms of the main distributor via a plurality of downcomers in
  • Flow connection is, wherein the liquid phase from the pre-distributor is additionally passed through the respective plurality of downcomers in the respective distribution arm.
  • the downpipes are arranged in the radial direction of the jacket further out than the central core tube.
  • the downpipes are thus grouped around the core tube and extend along the
  • a further embodiment of the method according to the invention provides that the liquid phase is dammed up defined on the ground, so that the individual
  • Downpipes e.g. be charged depending on the level of the liquid phase in the pre-distributor with the liquid phase.
  • the supply of the main distributor with liquid phase for the startup of the heat exchanger can be targeted optimally adjusted (see also above).
  • the invention advantageously makes it possible to increase the free cross section for running off the liquid phase, so that degassing of the liquid is possible.
  • a submerged operation of the downpipes is possible, with the additional advantage of conducting liquid phase without Gasmitriss down. Due to the fact that the additional downspouts are seen radially in the outside
  • the supply of the main distributor for the start can be optimally set optimally.
  • Fig. 1 is a schematic, sectional view of an inventive
  • Fig. 2 is a schematic plan view of the bottoms of the distributor arms of
  • Main distributor of the heat exchanger shown in FIG. FIG. 1 shows, in connection with FIG. 2, a wound heat exchanger 1 with a tube bundle 2 which serves to receive a first medium S which is to undergo indirect heat exchange with a liquid phase F driven in a jacket space 5 surrounding the tube bundle 2.
  • the shell space 5 is bounded by a pressure-bearing jacket 4, which extends along a longitudinal or
  • Cylinder axis Z extends, which is aligned parallel to the vertical.
  • the tube bundle 2 has a plurality of tubes 20, each of which is helically wound on a core tube 3 which is elongated along the longitudinal axis Z and which is arranged coaxially with the jacket 4 in the jacket space 5.
  • a core tube 3 which is elongated along the longitudinal axis Z and which is arranged coaxially with the jacket 4 in the jacket space 5.
  • the predistributor 100 has a bottom 101 extending transversely to the longitudinal axis Z and a circumferential lateral wall 102 which extends therefrom.
  • the supply line 104 further has a downward-pointing outlet opening 105, which is opposite to a baffle plate 103, which is arranged above the bottom 101 of the pre-distributor 100 in the pre-distributor 100.
  • the bottom 101 of the pre-distributor 100 further has a central opening 106, through which the liquid phase F can flow into the core tube 3, which is in flow communication with the opening 106.
  • the liquid phase F can be guided in a tube arranged in the core tube 3 or in the core tube 3 itself.
  • a flow path 30 is present in the core tube 3, via which the liquid phase F from the pre-distributor 100 in below the bottom 101 of Pre-distributor 100 provided distributor arms 201 can be guided, which in each case in a radial direction R depart from the core tube 3 and thereby extend to an inner side 4a of the shell 4.
  • the distributor arms 201 form a main distributor 200 of the
  • Heat exchanger 1 the task of which is to distribute the liquid phase F from above onto the tube bundle 2.
  • the distributor arms 201 each have a bottom 202 extending transversely to the longitudinal axis Z, in which a multiplicity of outlet openings 207 are provided, through which the liquid phase F can flow down from above onto the tube bundle 2, which extends along the longitudinal axis Z below the distributor arms 201 is arranged.
  • the distributor arms 201 further each have two lateral, each other
  • the distributor arms 201 therefore each have, in particular, a cake piece-like shape.
  • the lateral walls 204, 205 and the frontal wall 206 of the respective Verteilerarmes 201 go further from the bottom 202 of the respective distribution arm 201 along the longitudinal axis Z upwards and each connect to a roof 203 of the respective distribution arm 201, which decreases from the core tube 3, starting to the inside 4a of the shell 4, so that the in the distributor arms 201 entrained gaseous phase G can rise along the roofs 203 to the core tube 3 out.
  • a gap 6 is preferably still present, through which tubes 20 of the tube bundle 2 to the
  • Distributor arms 201 passing along the longitudinal axis Z can be guided upwards.
  • Main distributor 200 to increase upward is provided according to the invention that preferably each, but at least one or more of the distributor arms 201 via at least one along the longitudinal axis Z extending downpipe 10 with the pre-distributor 100 is in flow communication or is, so that the liquid to be distributed Phase F can also get over the respective downpipe 10 from the pre-distributor 100 in the respective distributor arm 201.
  • each distribution arm 201 According to one embodiment of the invention, be connected via a downpipe 10 with the pre-distributor 201 exactly.
  • a plurality of downpipes 10 may be present (shown in the figure 1 by dashed lines), which then possibly have a smaller inner diameter to represent the required free cross-section.
  • the downpipes 10 are in each case flow-connected to the pre-distributor 100 via an inlet opening 11 provided on the bottom 101 of the predistributor 100 and preferably open into the roof 203 from above via an outlet opening 12 of the respectively associated distributor arm 201.
  • the downpipes 10 preferably run parallel to the core tube 3 between the predistributor 100 and the associated distributor arm 201.
  • the downpipes 10 may also have an inclination with respect to the longitudinal axis Z or a deviation from a linear or parallel profile.
  • the inlet openings 1 1 are surrounded by the downpipes 10 of weirs 13, above whose height above the bottom 101, the feed of the liquid phase F to the main manifold 200 can be controlled. This can be particularly advantageous when starting the system (see above).
  • the liquid phase F can now also be supplied to the main distributor 200 via the downpipes 10.
  • the free cross-section is increased for the ascending gaseous phase G, so that this advantageously hinders the downflowing liquid phase F less.
  • Conventional heat exchanger can be easily retrofitted with the downpipes 10 according to the invention if necessary.

Landscapes

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

Abstract

L'invention concerne un échangeur de chaleur (1) comprenant : un prérépartiteur (100) pour recevoir une phase liquide (F) à répartir sur un faisceau de tubes (2) de l'échangeur de chaleur (1), un tube central (3) s'étendant le long d'un axe longitudinal (Z), tube central sur lequel sont enroulés une pluralité de tubes (20) qui constituent le faisceau de tubes (2), un répartiteur principal (200) qui présente une pluralité de bras de répartition (201) faisant saillie du tube central (3), destinés à répartir ladite phase liquide (F) sur le faisceau de tubes (2), les bras de répartition (201) étant en liaison d'écoulement avec le prérépartiteur par l'intermédiaire d'un trajet d'écoulement s'étendant dans le tube central (3), de sorte que la phase liquide (F) peut être introduite à partir du prérépartiteur (100) dans les bras de répartition (201) du répartiteur principal (200) par l'intermédiaire du trajet d'écoulement (30). Selon l'invention, un, plusieurs ou tous les bras de répartition (201) sont chacun en liaison d'écoulement avec le prérépartiteur (100), par l'intermédiaire d'au moins un tube de descente 10) qui s'étend le long de l'axe longitudinal, à l'extérieur du tube central (3), de manière que la phase liquide (F) à répartir peut également être introduite dans chaque bras de répartition (201) par le tube de descente (10) correspondant.
PCT/EP2017/025070 2016-03-30 2017-03-29 Echangeur de chaleur à spirales WO2017167458A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16000735 2016-03-30
EP16000735.7 2016-03-30

Publications (1)

Publication Number Publication Date
WO2017167458A1 true WO2017167458A1 (fr) 2017-10-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/025070 WO2017167458A1 (fr) 2016-03-30 2017-03-29 Echangeur de chaleur à spirales

Country Status (1)

Country Link
WO (1) WO2017167458A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109357551A (zh) * 2018-09-19 2019-02-19 合肥通用机械研究院有限公司 一种优化传热效率的换热结构及测控方法
DE102018000468A1 (de) * 2018-01-22 2019-07-25 Linde Aktiengesellschaft Gewickelter Wärmeübertrager mit Abscheider im Kernrohr
CN111595180A (zh) * 2020-05-27 2020-08-28 中国石油大学(华东) 一种适用于flng的正弦波纹管型绕管式换热器
WO2022268360A1 (fr) * 2021-06-23 2022-12-29 Linde Gmbh Injection réglable pour réaliser différentes distributions locales de fluide frigorigène

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2818821A1 (fr) * 2013-06-27 2014-12-31 Linde Aktiengesellschaft Echangeur de chaleur enroulé avec alimentation par tuyau central
US20150369548A1 (en) * 2012-10-09 2015-12-24 Linde Aktiengesellschaft Method for controlling a temperature distribution in a heat exchanger

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150369548A1 (en) * 2012-10-09 2015-12-24 Linde Aktiengesellschaft Method for controlling a temperature distribution in a heat exchanger
EP2818821A1 (fr) * 2013-06-27 2014-12-31 Linde Aktiengesellschaft Echangeur de chaleur enroulé avec alimentation par tuyau central

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018000468A1 (de) * 2018-01-22 2019-07-25 Linde Aktiengesellschaft Gewickelter Wärmeübertrager mit Abscheider im Kernrohr
CN109357551A (zh) * 2018-09-19 2019-02-19 合肥通用机械研究院有限公司 一种优化传热效率的换热结构及测控方法
CN111595180A (zh) * 2020-05-27 2020-08-28 中国石油大学(华东) 一种适用于flng的正弦波纹管型绕管式换热器
WO2021238684A1 (fr) * 2020-05-27 2021-12-02 中国石油大学(华东) Échangeur de chaleur tubulaire enroulé de type ondulé sinusoïdal convenant à l'évacuation des eaux usées.
WO2022268360A1 (fr) * 2021-06-23 2022-12-29 Linde Gmbh Injection réglable pour réaliser différentes distributions locales de fluide frigorigène

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