EP1283401A1 - Condenseur vaporiseur multiétagé - Google Patents

Condenseur vaporiseur multiétagé Download PDF

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Publication number
EP1283401A1
EP1283401A1 EP01122110A EP01122110A EP1283401A1 EP 1283401 A1 EP1283401 A1 EP 1283401A1 EP 01122110 A EP01122110 A EP 01122110A EP 01122110 A EP01122110 A EP 01122110A EP 1283401 A1 EP1283401 A1 EP 1283401A1
Authority
EP
European Patent Office
Prior art keywords
passages
evaporation
evaporation passages
circulation
condenser
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.)
Withdrawn
Application number
EP01122110A
Other languages
German (de)
English (en)
Inventor
Michael 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
Priority to DE10137103A priority Critical patent/DE10137103A1/de
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to EP01122110A priority patent/EP1283401A1/fr
Priority to PCT/EP2002/007517 priority patent/WO2003012352A2/fr
Publication of EP1283401A1 publication Critical patent/EP1283401A1/fr
Withdrawn legal-status Critical Current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
    • F25J2250/10—Boiler-condenser with superposed stages
    • 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
    • F25J2250/20—Boiler-condenser with multiple exchanger cores in parallel or with multiple re-boiling or condensing streams
    • 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 circulating capacitor with a capacitor block, the Liquefaction passages for a heating medium and at least one circulation section with evaporation passages for a liquid, the Inlet opening and the outlet opening of each evaporation passage opposite sides of the capacitor block and where the Inlet openings of all evaporation passages of the circulation section below the Outlet openings of the evaporation passages of the circulation section are arranged are.
  • the main condenser is manufactured almost exclusively as a plate heat exchanger and designed as a falling film evaporator or as a circulation condenser.
  • a Circulating condenser stands the condenser block in the liquid bath from which Liquid should be evaporated.
  • the liquid enters from below Evaporation passages of the condenser block and is partially against that heating medium flowing through the liquefaction passages evaporates.
  • the density of the medium evaporating in the evaporation passages is less than the density of the surrounding liquid bath, which creates a siphon effect, so that Liquid flows from the liquid bath into the evaporation passages.
  • Liquid oxygen is evaporated in the main condenser of an air separation plant. It is important to ensure that the evaporation passages of the Condenser blocks flowing in liquid oxygen evaporates only to a fraction becomes. This prevents possible liquid oxygen existing interfering impurities are enriched. So be for example, only about 10% of those flowing into the evaporation passages Amount of liquid oxygen evaporates and 90% as liquid from the Outlet openings of the evaporation passages back to the inlet openings of the Evaporation passages promoted.
  • the part of the capacitor block in which such Circulation of liquid is achieved hereinafter referred to as the circulation section designated.
  • the Efficiency of a circulation condenser can, however, by dividing the Capacitor blocks increased in several circulation sections arranged one above the other become.
  • the advantage of such an arrangement is that the immersion depth of the individual circulation sections is in each case less than a single high one Capacitor bank.
  • the hydrostatic pressure in the Evaporation passages are reduced and the liquid can evaporate more easily.
  • the object of the present invention is therefore to provide a circulation condenser develop in which the evaporation passages are as uniform as possible Evaporation of the liquid is achieved and with as little as possible constructive effort.
  • This task is performed by a circulation capacitor of the type mentioned solved, are provided in the first and second evaporation passages and themselves the inlet openings of the first evaporation passages and the outlet openings the second evaporation passages on the same side of the condenser block are located.
  • the liquid enters the first evaporation passages from below , flows upwards in the evaporation passages, partially evaporates and leaves the first evaporation passages on the opposite side of the Capacitor block.
  • the liquid portion of the from the first evaporation passages escaping liquid-gas mixture flows to those on the same side as that Outlet openings of the first evaporation passages arranged inlet openings the second evaporation passages.
  • the liquid then flows through the second Evaporation passages back to the side of the condenser block where the Entry openings are located in the first evaporation passages. During the Flow through the second evaporation passages again becomes part of the Liquid evaporates.
  • the liquid is by means of the first and second Evaporation passages between two opposite sides of the Condenser blocks back and forth conveyed and increasingly evaporated.
  • Elaborate constructions such as return pipes or return channels for the liquid are therefore no longer necessary.
  • the evaporation passages are designed so that there are all inlet openings a circulation section below the outlet openings of this circulation section are located. In this way, one can in front of the inlet openings Liquid level should be chosen so that the liquid can flow in through the inlet openings all evaporation passages occur, but the outlet openings end in the gas space. This has the advantage that the ascending in the evaporation passages Liquid-gas mixture in all evaporation passages the same back pressure experiences, which in turn different circulation rates in the individual Evaporation passages are avoided.
  • liquid level in front of the inlet openings is chosen to be high enough that the static pressure at the individual inlet openings decreases by less than 20%, preferably less than 10%, particularly preferably less than 5%, so circulation rates are almost the same through all evaporation passages.
  • All of the first and / or all of the second evaporation passages are preferably one Orbital section of the same length. Most preferably all Evaporation passages of a circulation section of the same length. In this way the circulation rate is the same in all evaporation passages, i.e. in every Evaporation passage presents the same ratio of non-evaporated liquid amount of gas evaporated. As a result, the liquid to be evaporated is always well mixed and any impurities do not accumulate in the liquid on.
  • a circulation section has the same number of first ones like second evaporation passages. It is also beneficial if everyone Evaporation passages have the same cross section. By this measure it ensures that just as much fluid flows through the first Evaporation passages as promoted by the second evaporation passages.
  • the circulation condenser according to the invention is particularly suitable as Main condenser of a cryogenic air separation plant.
  • a circulation section of a circulation condenser is shown schematically, the main capacitor of a double column in one Cryogenic air separation plant is used to evaporate oxygen.
  • the circulation condenser has a multiplicity of arranged in parallel Heat exchange passages in which gaseous nitrogen in the indirect Heat exchange with liquid oxygen is condensed, the oxygen evaporated.
  • the liquefaction passages for the nitrogen extend from top to bottom over the entire height of the circulation condenser.
  • the liquefaction passages for the nitrogen extend from top to bottom over the entire height of the circulation condenser.
  • evaporation passages 1, 11 are two different types of evaporation passages 1, 11 provided.
  • the limitations are the first Evaporation passages 1 with solid lines that the second Evaporation passages 11 shown with dashed lines.
  • the first evaporation passages 1 have at the lower left end of the circulation section their entry openings 2 and on the right upper end of their outlet openings 3.
  • the second evaporation passages 11 run opposite from bottom right to top left.
  • the single ones Evaporation passages 1, 11 run from the respective inlet opening 2, 12 first horizontally, then vertically upwards and finally horizontally the outlet openings 3, 13. This design ensures that all Evaporation passages each have the same length.
  • Figure 2 shows the view of the side labeled "A" in Figure 1 Circulation section.
  • the liquefaction passages 4 for the nitrogen and the Evaporation passages 1, 11 for the oxygen alternate to one if possible to achieve good heat exchange between the nitrogen and the oxygen.
  • the first evaporation passages 1 are located in one half of the Circulation section, the second evaporation passages 11 in the other half.
  • the inlet openings 2 of the first are in the right half of FIG Evaporation passages 1 and in the left half of FIG. 2 the outlet openings 13 of the second evaporation passages 11.
  • FIG. 1 An alternative arrangement of the evaporation passages 1, 11 is shown in FIG.
  • the evaporation passages 1, 11 alternate with the Liquefaction passages 4 from.
  • the first evaporation passages 1 and the second Evaporation passages 11 arranged alternately, with one first evaporation passage 1 and a second evaporation passage 11 each a liquefaction passage 4 is located.
  • FIG. 4 shows a section through a circulation condenser according to the invention, the as the main condenser of a double column in a cryogenic air separation plant is used.
  • the circulation condenser consists of four superimposed ones Circulation sections 100, 200, 300, 400.
  • inlet and outlet openings e.g. 402, 403, 412, 413, provided sides of each circulation section 100, 200, 300, 400 liquid containers 120, 220, 320, 420 are respectively attached.
  • the overflow line 21 has an entry opening at the level of each circulation section 100, 200, 300, 400 122, 222, 322, 422, so that at a certain level in the respective Liquid container 120, 220, 320, 420 liquid enters the overflow pipe 21 and in the liquid container 120, 220, 320 of the underlying circulation section 100, 200, 300 is passed.
  • the inlet openings 122, 222, 322, 422 in the overflow line 21 are on one provided that the maximum fill level in the Liquid containers 120, 220, 320, 420 between 50 and 90%, preferably between 60 and 80% of the height of the respective circulation section 100, 200, 300, 400 lies.
  • the inlet openings 122, 222, 322, 422 are particularly preferred Overflow line 21 attached so that the maximum liquid level in the Liquid containers 120, 220, 320, 420 below the outlet openings 3, 13 located.
  • the inventive arrangement of all inlet openings 2, 12 below the Outlet openings 3, 13 of the respective circulation section can be a liquid level can be selected in the liquid containers 120, 220, 320, 420, which is between the top inlet opening 2, 12 and the bottom outlet opening 3, 13. So will ensures that all evaporation passages 1, 11 at their entrance 2, 12 in Liquid and at their outlet 3, 13 are in the gas space.
  • the back pressure on Outlet end 3, 13 is therefore the same for all evaporation passages 1, 11, so that in an approximately the same circulation rate is achieved in all evaporation passages 1, 11.
  • the liquid containers 120, 220, 320, 420 are also two Gas collecting lines 23 penetrates, so that the evaporation in the Evaporation passages 1, 11 emerging and into the liquid containers 120, 220, 320, 420 flowing oxygen gas from the liquid containers 120, 220, 320, 420 can be withdrawn via the gas manifold 23.
  • FIG. 5 the arrangement of the gas manifolds 23 and the overflow pipe 22 in the top view.
  • the first and second evaporation passages 1, 11 are in each circulation section 100, 200, 300, 400 as explained above with reference to FIG. 2, arranged.
  • the first are in the illustration according to FIG Evaporation passages 1 in the lower half of the drawing, the second Evaporation passages 11 in the upper half of the drawing. Accordingly, by the first evaporation passages 1 liquid from left to right and through the second evaporation passages 11 transported from right to left.
  • the gas manifolds 23 are arranged so that they are not in front of the Exit openings of the evaporation passages 1, 11 are located. Through the side Displacement of the gas manifolds 23 with respect to the outlet openings 3, 13 of the Evaporation passages 1, 11 becomes the evaporation passages 1, 11 escaping gas-liquid mixture is first deflected, the Flow rate of the gaseous oxygen reduced and more gaseous is separated from liquid oxygen. An entrainment of liquid oxygen in the Gas manifold 23 is largely avoided.
  • the entire liquid is always in a circulation section 100, 200, 300, 400 one side to the other side of the circulation section 100, 200, 300, 400 and again promoted back and mixed optimally. It is therefore only on one side of the Condenser blocks a liquid overflow 21 necessary.
  • This overflow 21 will preferably arranged on the side of the capacitor block on which the Liquid oxygen 25 is supplied.
  • the nitrogen passages extend over the entire height of the Capacitor blocks, that is, over all circulation sections 100, 200, 300, 400.
  • the Gaseous nitrogen is supplied to the nitrogen passages via the feed line 26 and withdrawn as liquid at the lower end of the block via line 27.
  • the distribution of the gaseous nitrogen on the nitrogen passages takes place via a with the Capacitor block connected manifold 28.
  • FIGS Circulating capacitor shown.
  • This consists of four capacitor blocks 61, 62, 63, 64, which in turn each have four circulation sections 100, 200, 300, 400.
  • Two capacitor blocks 61, 62 and 63, 64 are arranged directly next to each other, so that the respective evaporation passages 1, 11 run parallel to one another.
  • the double blocks 61, 62 and 63, 64 which are formed in this way are Outlet openings 2, 3, 12, 13 opposite (see Figure 8).
  • the arrangement of the first and second evaporation passages 1, 11 again correspond to Figure 2.
  • Die Capacitor blocks 61 and 62 or 63 and 64 are arranged side by side so that their block halves provided with the first evaporation passages 1 contiguous.
  • the two double blocks 61, 62 and 63, 64 each have a common one Liquid container 20.
  • the middle between the capacitor blocks 61, 62, 63, 64 there is a common to all blocks for each circulation section 200, 300, 400 Liquid containers 30.
  • the outer liquid containers 20 collect only those circulating liquid that through the second evaporation passages 11 in the Liquid container 20 is passed and promote it over the first Evaporation passages 1 back into the central liquid container 30.
  • the Supply of the gas-liquid mixture emerging from the first evaporation passages 1 essentially in the middle of the liquid container 30.
  • the Gas manifolds 23 are therefore in the outer region of the liquid container 30 near the entry openings into the second evaporation passages 11 arranged. In these zones, the flow rate from the first evaporation passages 1 escaping gas-liquid mixture so far soothes that practically no liquid is entrained in the gas manifolds 23 becomes.
  • FIGS. 9 and 10 show an alternative arrangement of the evaporation passages 1, 11 with an arrangement of the capacitor blocks 61, 62, 63, 64 according to FIG. 6. Just as with the system according to FIGS. 6 to 8, this is where it starts Orbital section from the corresponding sections 100, 200, 300, 400 of the four Capacitor blocks 61, 62, 63, 64 together. In this case, however, not everyone owns of blocks 61, 62, 63, 64 first evaporation passages 1 and second Evaporation passages 11.
  • first evaporation passages 1 and Backflow through second evaporation passages 11 will not occur in each one Block 61, 62, 63, 64 realized, but in that the two neighboring Capacitor blocks 61, 62 and 63, 64, each rotated by 180 °, joined together become.
  • the evaporation passages of the condenser block 61 and 63 correspond the second evaporation passages 11 and the evaporation passages in the Condenser blocks 62 and 64 correspond to the first evaporation passages 1.

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  • 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)
  • Separation By Low-Temperature Treatments (AREA)
EP01122110A 2001-07-30 2001-09-14 Condenseur vaporiseur multiétagé Withdrawn EP1283401A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE10137103A DE10137103A1 (de) 2001-07-30 2001-07-30 Mehrstöckiger Kondensator-Verdampfer
EP01122110A EP1283401A1 (fr) 2001-07-30 2001-09-14 Condenseur vaporiseur multiétagé
PCT/EP2002/007517 WO2003012352A2 (fr) 2001-07-30 2002-07-05 Condensateur-evaporateur a plusieurs etages

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10137103 2001-07-30
DE10137103A DE10137103A1 (de) 2001-07-30 2001-07-30 Mehrstöckiger Kondensator-Verdampfer
EP01122110A EP1283401A1 (fr) 2001-07-30 2001-09-14 Condenseur vaporiseur multiétagé

Publications (1)

Publication Number Publication Date
EP1283401A1 true EP1283401A1 (fr) 2003-02-12

Family

ID=26009811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01122110A Withdrawn EP1283401A1 (fr) 2001-07-30 2001-09-14 Condenseur vaporiseur multiétagé

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Country Link
EP (1) EP1283401A1 (fr)
DE (1) DE10137103A1 (fr)
WO (1) WO2003012352A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10328746A1 (de) * 2003-06-25 2005-01-13 Behr Gmbh & Co. Kg Vorrichtung zum mehrstufigen Wärmeaustausch und Verfahren zur Herstellung einer derartigen Vorrichtung
DE102011113671A1 (de) 2011-09-20 2013-03-21 Linde Ag Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
AU2012311959B2 (en) 2011-09-20 2016-09-08 Linde Aktiengesellschaft Method and device for the cryogenic decomposition of air
DE102011113668A1 (de) 2011-09-20 2013-03-21 Linde Aktiengesellschaft Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft
DE102015009563A1 (de) 2015-07-23 2017-01-26 Linde Aktiengesellschaft Luftzerlegungsanlage und Luftzerlegungsverfahren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566310A (en) * 1946-01-22 1951-09-04 Hydrocarbon Research Inc Tray type heat exchanger
US4330308A (en) * 1979-05-18 1982-05-18 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Plate-type heat exchangers
US5979182A (en) * 1997-03-13 1999-11-09 Kabushiki Kaisha Kobe Seiko Sho Method of and apparatus for air separation
DE19939294A1 (de) * 1999-08-19 2001-02-22 Linde Ag Mehrstöckiger Umlaufkondensator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566310A (en) * 1946-01-22 1951-09-04 Hydrocarbon Research Inc Tray type heat exchanger
US4330308A (en) * 1979-05-18 1982-05-18 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Plate-type heat exchangers
US5979182A (en) * 1997-03-13 1999-11-09 Kabushiki Kaisha Kobe Seiko Sho Method of and apparatus for air separation
DE19939294A1 (de) * 1999-08-19 2001-02-22 Linde Ag Mehrstöckiger Umlaufkondensator

Also Published As

Publication number Publication date
WO2003012352A2 (fr) 2003-02-13
WO2003012352A3 (fr) 2003-04-17
DE10137103A1 (de) 2003-02-13

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