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EP0795349B1 - Dispositif et procédé pour l'évaporation d'un liquide - Google Patents

Dispositif et procédé pour l'évaporation d'un liquide Download PDF

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Publication number
EP0795349B1
EP0795349B1 EP96107773A EP96107773A EP0795349B1 EP 0795349 B1 EP0795349 B1 EP 0795349B1 EP 96107773 A EP96107773 A EP 96107773A EP 96107773 A EP96107773 A EP 96107773A EP 0795349 B1 EP0795349 B1 EP 0795349B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
heating fluid
liquid
passages
pressure column
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.)
Expired - Lifetime
Application number
EP96107773A
Other languages
German (de)
English (en)
Other versions
EP0795349A1 (fr
Inventor
Wilhelm Rohde
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 GmbH filed Critical Linde GmbH
Publication of EP0795349A1 publication Critical patent/EP0795349A1/fr
Application granted granted Critical
Publication of EP0795349B1 publication Critical patent/EP0795349B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F25J5/005—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 in a reboiler-condenser, e.g. within a column
    • 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
    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/02—Bath type boiler-condenser using thermo-siphon effect, e.g. with natural or forced circulation or pool boiling, i.e. core-in-kettle heat exchanger
    • 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
    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/04—Down-flowing type boiler-condenser, i.e. with evaporation of a falling liquid film
    • 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
    • F25J2250/00—Details related to the use of reboiler-condensers
    • F25J2250/10—Boiler-condenser with superposed stages
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00—Refrigeration
    • Y10S62/902—Apparatus
    • Y10S62/903—Heat exchange structure

Definitions

  • the invention relates to a device for evaporating a liquid with a first and a second heat exchanger, both heat exchangers Evaporation passages as well as passages for a heating fluid contain the first Heat exchanger as falling film evaporator and the second heat exchanger as Liquid bath evaporator is formed, the first heat exchanger means for Introducing heating fluid and means for withdrawing heating fluid and wherein the second heat exchanger has means for introducing heating fluid.
  • Liquid bath evaporator also thermosiphon evaporator called, are in a liquid bath, the evaporation passages communicate with the liquid bath and the vapor formed from the top the evaporation passages. With falling film evaporators, the liquid flows as Film over the walls of the evaporation passages and partially evaporates; the formed vapor flows down with the liquid and is at the bottom of the Evaporation passages are subtracted together with the liquid portion. Both types have disadvantages.
  • the invention is therefore based on the object of a device at the outset mentioned type to develop, which is particularly inexpensive, especially very can be made compact.
  • the means for withdrawing heating fluid the first heat exchanger in flow communication with the means for Introduce heating fluid into the second heat exchanger.
  • the two Heat exchangers are also connected in series on the heating fluid side, in such a way that the heating fluid first passes through the heating fluid passages of the falling film evaporator and the heating fluid emerging from the falling film evaporator at least partially, preferably completely or substantially completely the heating fluid passages of the Liquid bath evaporator is supplied.
  • Each of the heat exchangers Invention can be formed from one or more blocks.
  • the liquid bath evaporator in the form of two or more side by side to arrange arranged blocks.
  • the distribution of the heating fluid between the two Heat exchanger not to be regulated can be direct, for example through a single short tube - to be connected.
  • the device according to the invention can thus be produced very inexpensively.
  • the two are preferred Heat exchanger formed as a block, the upper portion of the block forms the first heat exchanger and the lower section of the block forms the forms the second heat exchanger. This eliminates the need for the heating fluid collect at the lower end of the first heat exchanger (falling film evaporator) and then again on the heating fluid passages of the second heat exchanger (Liquid bath evaporator) to distribute.
  • the block over its entire length or over has substantially its entire length heating fluid passages.
  • the entire device is therefore on the heating fluid side like a single heat exchanger block formed, for example, the design of a plate heat exchanger. Only on the evaporation side must in the transition between the first and second Heat exchanger from above (from the falling film evaporator) flowing vapor-liquid mixture be led out of the heat exchanger block so that the remaining liquid flows into the liquid bath and the vapor formed can be deducted. At the same time, in this area the Evaporation passages of the second heat exchanger (Liquid bath evaporator) generated steam from the heat exchanger block subtracted from.
  • the device can thus be very simple and inexpensive be built. There are no special measures to connect the Heating fluid passages; also the special measures described above in Transition area can be realized without much effort, preferably in an aluminum plate heat exchanger.
  • the invention further relates to a method for evaporating a liquid according to claim 4.
  • an application of the device and the method are all in one Double column process for air separation according to claim 5 and one corresponding device for the low-temperature separation of air according to Claim 6 subject of the invention.
  • This is the one described above Device as a condenser-evaporator (main condenser) in an air separation double column used.
  • the liquid to be evaporated is thereby oxygen-rich bottom liquid of the low pressure column, the heating fluid through nitrogen-rich top gas of the pressure column formed in the condenser-evaporator condensed.
  • the housing of the device is covered by the jacket 1 a double column for low-temperature air separation formed, the pressure column 2 and has a low pressure column 3. Of the two pillars, only the head and head are Swamp area shown.
  • the entire condenser evaporator is formed as a plate heat exchanger block 4.
  • FIG 1 shows one of the evaporation passages. Make the vertical lines no walls between different passages, but the fittings (fins) within the one evaporation passage.
  • the arrangement of the passages is in figure 2 schematically shown in cross section: layer by layer alternate Evaporation passages 15 and 16 heating fluid passages.
  • the height of the passages (Distance between two plates) is, for example, 2 to 10 mm.
  • the total number the passages arranged next to each other is - depending on their height, for example 10 to 400.
  • the lower part 9 of the same passages forms the evaporation passages of the as Liquid bath evaporator trained second heat exchanger. You are on open at the bottom and thereby communicate with a liquid bath 11. Upward flowing steam and possibly entrained liquid flow in the Transition area 8 laterally out of block 4 (left in the drawing). By each evaporation passage runs a separation bar 17 at an angle through the Transition area separating the first and second heat exchangers from each other separates.
  • the steam formed in the two heat exchangers is partly via the Product line 12 discharged; to another extent it flows into the low pressure column 3.
  • the liquid portion of both heat exchangers falls into that Liquid bath 11 from which the second heat exchanger 9 is fed. There can be removed liquid via line 20 if necessary.
  • Heating fluid passages run in the embodiment without separation over the total height of the block 4, that is, by the first heat exchanger 7, the Transition area 8 and the second heat exchanger 9. At most the density or the type of internals (fins) can change over the height of the heating fluid passages.
  • the length (vertical extension) of the first heat exchanger 7 is in one concrete example 1.7 m, the second heat exchanger 9 is 2.8 m long; the Transitional area 8 has an extension of 0.6 m in the vertical direction Stack height of the plates (vertical in Figure 2) is equal to 1.20 m at a passage height (Plate spacing) of 6 mm.
  • the condenser-evaporator combines the functions of two in a block 4 different types of heat exchanger 7, 9. Nevertheless, the manufacturing effort is hardly larger than with a conventional plate heat exchanger: While the Heating fluid passages can be completely conventional, are only in Transitional area 8 of the evaporation passages some additional measures necessary, namely the installation of inclined fins and a separating strip 17, as well as the side opening of the evaporation passages. Overall, it results a very inexpensive and compact arrangement that takes advantage of Falling film evaporators and liquid bath evaporators combined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Claims (6)

  1. Dispositif pour évaporer un liquide, comprenant un premier (7) échangeur de chaleur et un deuxième (9) échangeur de chaleur, les deux échangeurs de chaleur (7,9) contenant des passages d'évaporation (15) ainsi que des passages (16) pour un fluide chaud, le premier échangeur de chaleur (7) étant exécuté sous forme d'un évaporateur à film tombant et le deuxième échangeur de chaleur (9) étant exécuté sous forme d'un évaporateur à bain liquide, le premier échangeur de chaleur (7) contenant des moyens (13,14) pour introduire un fluide chaud et des moyens pour soutirer un fluide chaud et le deuxième échangeur de chaleur (9) présentant des moyens pour introduire un fluide chaud, caractérisé en ce que les moyens pour soutirer le fluide chaud du premier échangeur de chaleur (7) se trouvent en liaison d'écoulement avec les moyens pour l'introduction du fluide chaud dans le deuxième échangeur de chaleur (9).
  2. Dispositif selon la revendication 1, caractérisé en ce que les deux échangeurs de chaleur (7,9) sont exécutés sous forme d'un bloc (4), la partie supérieure du bloc (4) formant le premier échangeur de chaleur (7) et la partie inférieure du bloc (4) formant le deuxième échangeur de chaleur (9).
  3. Dispositif selon la revendication 2, caractérisé en ce que le bloc (4) présente des passages (16) pour le fluide chaud s'étendant sur toute sa longueur ou sur essentiellement toute sa longueur.
  4. Procédé pour l'évaporation d'un liquide en échange de chaleur indirect avec un fluide chaud, le liquide (5,6) étant d'abord introduit dans les passages d'évaporation (15) d'un premier échangeur de chaleur (7), qui est exécuté sous forme d'un évaporateur à film tombant, puis dans un deuxième échangeur de chaleur (9), qui est exécuté sous forme d'un évaporateur à bain liquide, et un fluide chaud (13,14) étant introduit dans les passages de fluide chaud des deux échangeurs de chaleur (7,9), caractérisé en ce qu'au moins une partie du fluide chaud qui est soutiré du premier évaporateur de chaleur (7) est introduit dans le deuxième échangeur de chaleur (9).
  5. Utilisation du dispositif selon l'une quelconque des revendications 1 à 3 et/ou du procédé selon la revendication 4 dans un procédé pour le fractionnement de l'air à basse température, qui présente une double colonne constituée d'une colonne de pression (2) et d'une colonne de basse pression (3), pour l'évaporation d'un liquide (5,6) provenant de la partie inférieure de la colonne de basse pression (3) en échange de chaleur indirect (7,9) à contre-courant de la vapeur condensante (13,14) provenant de la partie supérieure de la colonne de pression (2).
  6. Dispositif pour le fractionnement de l'air à basse température, qui présente une double colonne constituée d'une colonne de pression (2) et d'une colonne de basse pression (3), la colonne de pression (2) et la colonne de basse pression (3) se trouvant en liaison thermique via un condenseur-évaporateur (7,9) commun, caractérisé en ce que le condenseur-évaporateur (7,9) est exécuté comme dispositif selon l'une quelconque des revendications 1 à 3.
EP96107773A 1996-02-14 1996-05-15 Dispositif et procédé pour l'évaporation d'un liquide Expired - Lifetime EP0795349B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19605500A DE19605500C1 (de) 1996-02-14 1996-02-14 Vorrichtung und Verfahren zum Verdampfen einer Flüssigkeit
DE19605500 1996-02-14

Publications (2)

Publication Number Publication Date
EP0795349A1 EP0795349A1 (fr) 1997-09-17
EP0795349B1 true EP0795349B1 (fr) 2001-12-05

Family

ID=7785408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107773A Expired - Lifetime EP0795349B1 (fr) 1996-02-14 1996-05-15 Dispositif et procédé pour l'évaporation d'un liquide

Country Status (5)

Country Link
US (1) US5901574A (fr)
EP (1) EP0795349B1 (fr)
JP (1) JPH09273699A (fr)
CN (1) CN1082824C (fr)
DE (2) DE19605500C1 (fr)

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FR2786858B1 (fr) 1998-12-07 2001-01-19 Air Liquide Echangeur de chaleur
FR2790546B1 (fr) * 1999-03-01 2001-04-20 Air Liquide Echangeur de chaleur, applications a la vaporisation de liquide sous pression et appareil de distillation d'air equipe d'un tel echangeur
FR2796137B1 (fr) * 1999-07-07 2001-09-14 Air Liquide Vaporiseur-condenseur a bain a plaques brasees et son application a un appareil de distillation d'air
DE19939294A1 (de) * 1999-08-19 2001-02-22 Linde Ag Mehrstöckiger Umlaufkondensator
US6173586B1 (en) * 1999-08-31 2001-01-16 Praxair Technology, Inc. Cryogenic rectification system for producing very high purity oxygen
DE19950570A1 (de) 1999-10-20 2001-04-26 Linde Ag Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
ATE298070T1 (de) * 1999-10-20 2005-07-15 Linde Ag Verfahren und vorrichtung zur tieftemperaturzerlegung von luft
FR2807826B1 (fr) * 2000-04-13 2002-06-14 Air Liquide Echangeur vaporisateur-condenseur du type a bain
DE10027140A1 (de) * 2000-05-31 2001-12-06 Linde Ag Mehrstöckiger Badkondensator
DE10028866A1 (de) * 2000-06-10 2001-12-20 Messer Ags Gmbh Verfahren und Vorrichtung zur Gewinnung von Argon
FR2817952A1 (fr) * 2000-12-08 2002-06-14 Air Liquide Vaporisateur-condenseur et installation de distillation d'air comportant un tel vaporisateur-condenseur
FR2822079B1 (fr) * 2001-03-16 2003-05-16 Air Liquide Procede et installation de production d'oxygene ultra-pur par distillation d'air
US6393866B1 (en) * 2001-05-22 2002-05-28 Praxair Technology, Inc. Cryogenic condensation and vaporization system
EP1837614A1 (fr) * 2006-03-23 2007-09-26 Linde Aktiengesellschaft Procédé et dispositif pour la vaporisation d'un liquide enrichi en oxygène et procédé et dispositif pour la séparation cryogénique d'air
US9476641B2 (en) * 2007-09-28 2016-10-25 Praxair Technology, Inc. Down-flow condenser reboiler system for use in an air separation plant
CN102470282B (zh) * 2009-09-30 2013-02-13 Ckd株式会社 液体汽化系统
CN101890316B (zh) * 2010-07-08 2012-07-11 宝钢工程技术集团有限公司 液体蒸发和气汽混合方法
AU2012311959B2 (en) * 2011-09-20 2016-09-08 Linde Aktiengesellschaft Method and device for the cryogenic decomposition of air
US9453674B2 (en) * 2013-12-16 2016-09-27 Praxair Technology, Inc. Main heat exchange system and method for reboiling
CN104197189B (zh) * 2014-07-21 2017-06-30 中国科学院力学研究所 一种液氧气化器装置
WO2020206019A1 (fr) * 2019-04-01 2020-10-08 Delta Separations Llc Système, procédé et appareil de séparation de mélange de cannabinoïdes et de récupération de solvant
US11774189B2 (en) * 2020-09-29 2023-10-03 Air Products And Chemicals, Inc. Heat exchanger, hardway fin arrangement for a heat exchanger, and methods relating to same

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US5709264A (en) * 1996-03-18 1998-01-20 The Boc Group, Inc. Heat exchanger

Also Published As

Publication number Publication date
EP0795349A1 (fr) 1997-09-17
JPH09273699A (ja) 1997-10-21
CN1161874A (zh) 1997-10-15
DE59608371D1 (de) 2002-01-17
US5901574A (en) 1999-05-11
CN1082824C (zh) 2002-04-17
DE19605500C1 (de) 1997-04-17

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