EP0001392A1 - Séparateur des vapeurs émanant des gaz liquéfiés à basse température, lors de leur transfert - Google Patents

Séparateur des vapeurs émanant des gaz liquéfiés à basse température, lors de leur transfert Download PDF

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Publication number
EP0001392A1
EP0001392A1 EP78100720A EP78100720A EP0001392A1 EP 0001392 A1 EP0001392 A1 EP 0001392A1 EP 78100720 A EP78100720 A EP 78100720A EP 78100720 A EP78100720 A EP 78100720A EP 0001392 A1 EP0001392 A1 EP 0001392A1
Authority
EP
European Patent Office
Prior art keywords
gas
liquid
container
low
hollow body
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Withdrawn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
EP78100720A
Other languages
German (de)
English (en)
Inventor
Wolfgang Volker
Peter Nobis
Jürgen Buchmüller
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim 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 Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP0001392A1 publication Critical patent/EP0001392A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/005—Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG

Definitions

  • the invention relates to a device for separating the gas evaporating during the conveyance of low-boiling gases.
  • Low-boiling gases such as oxygen, nitrogen, argon and methane are extracted and stored in a liquid state for economic reasons.
  • Nitrogen in liquid form is used as the cooling medium for many machining processes.
  • Evaporation losses are unavoidable with every delivery and storage of low-boiling liquefied gases, since even with the best insulation, the penetration of heat into the pipes and storage tanks cannot be completely avoided.
  • In the equilibrium state each supply of heat causes the evaporation of a corresponding part of the liquefied gas. This evaporation can only be prevented by increasing the process pressure , which in many cases cannot be permitted for technical or economic reasons.
  • the vaporized gas quantities present considerable difficulties, particularly when pumping low-boiling liquefied gases. Especially with long supply lines between the liquid gas storage and the place of use, which often cannot be avoided due to the spatial conditions in the factories, the difficulties caused by partial evaporation are considerable.
  • the partial evaporation of the liquefied gas causes a two-phase flow when conveying in pipelines.
  • Gas plugs can form, so that, for example, no liquid but gaseous nitrogen reaches the point of use. This means that the cold supply at the place of use is insufficient.
  • phase separator between the liquid gas storage and the point of use. This ensures that the point of use is evenly supplied with low-boiling liquefied gas.
  • the vaporized gas separated in the phase separator can also be directed to the point of use and support the cooling effect.
  • phase separators are known for example from US Pat. No. 3,858,404. They basically consist of a container in which the low-boiling liquefied gas, which has already partially evaporated, is introduced. In the container, the liquid separates from the gas, so that both media can be removed from the container separately.
  • phase separators work satisfactorily, the disadvantage is their relatively large construction volume and a rather uneconomical mode of operation. This is due to the fact that the partially evaporated, low-boiling, liquefied gas is divided into gas and liquid drops of various sizes as they enter the phase separator. While the larger drops fall to the bottom of the vessel and collect as a liquid, the smaller drops are entrained by the gas formed and also removed by the discharge line for the gas formed in the phase separator. This is synonymous with a loss of cooling liquid, which is particularly noticeable when the extracted gas cannot be used for cooling purposes.
  • the phase separator In order to prevent the droplets of liquid from being carried as far as possible, the phase separator is built with a very large volume, because then the gas velocities remain lower and only the very small drops are entrained by the gas. Apart from the increased space requirements, the construction costs for the P hasensepa- generators this also greatly increased because the containers must be isolated and the insulation is expensive.
  • the invention is therefore based on the object of a device for separating the deep in the promotion boiling liquefied gas evaporating gas, consisting of an insulated container with a supply line for the low-boiling liquefied gas and discharge lines for the separated gaseous and remaining liquid gas, as well as devices for controlling the level in the container and the supply of the low-boiling liquefied gas into the container create through which the entrainment of liquid droplets with the separated, vaporized gas is avoided and which also requires only an extremely small volume.
  • this is achieved in that the supply line for the low-boiling liquefied gas in the container opens into a porous hollow body.
  • the porous hollow body is preferably arranged in the upper region of the container.
  • the feed line for the low-boiling liquefied gas is led through the upper container bottom into the container. It is particularly advantageous if not only the feed line, but also the discharge line and the lines for the control devices are led through the upper container bottom into the container by means of a common flange connection.
  • the cold losses are kept low, since only a common thermal bridge is formed.
  • the common flange connection enables the use and mutual exchange of different types of containers.
  • the effectiveness of the device according to the invention is based on the fact that a Pre-separation between liquid and gas takes place.
  • the liquid collects at the bottom of the porous hollow body and rains in the form of large drops in the insulated container. Due to their weight, these large drops are not carried away by the gas flow. It is therefore possible to allow high gas velocities and, accordingly, low construction volumes of the insulated containers.
  • the porous hollow body can be arranged in the upper region of the insulated container. This reduces the overall height.
  • the low-boiling liquefied gas is introduced in the middle of the container, so that as many drops as possible, which are initially entrained by the gas formed, still have the opportunity in the container to separate from the gas flow and move downwards fall.
  • the insulated container 1 shown in FIG. 1 has a supply line 3, provided with a valve 2, for the low-boiling liquefied gas, which according to the invention opens into a hollow body 4 arranged in the container 1.
  • the porous hollow body 4 is shown enlarged in FIG. 2.
  • the liquefied gas which has entered the porous hollow body 4 through the feed line 3 separates into a liquid and a gaseous phase.
  • the gaseous phase represented by the dashed arrows 5 escapes through the walls of the porous hollow body 4. All droplets of the liquid phase collect as a liquid bath 6 at the bottom of the porous hollow body 4.
  • the emerging liquid drops are so heavy that they immediately fall down and cannot be entrained by the gas emerging from the porous hollow body 4.
  • the porous hollow body 4 can therefore be arranged in the upper region of the insulated container 1.
  • the container volume can therefore be used much better and its height can be reduced.
  • the liquid emerging from the porous hollow body 4 collects at the bottom of the insulated container 1 as a liquid bath 8.
  • the liquid is drawn off through the discharge line 10 provided with a valve 9. Accordingly, the gas phase is removed from the discharge line 12 by means of a discharge line 12 provided with a valve 11. Tray 1 removed.
  • the regulation of the liquid supply through line 3 and the level in container 1 is carried out with the aid of pressure monitors 13 and 14 and induction switch 15 is filled.
  • the pressure in container 1 increases during the filling process.
  • the valve 11 is opened by means of the pressure switch 14. It then flows as long as a gas-liquid mixture through the conduit 3 and the porous hollow body 4 in the B-e container 1, is closed until the valve 2 via the liquid display 15, a induction switch. Only after the liquid level has dropped does the valve 2 open again, so that the gas-liquid mixture can flow into the phase separator again.
  • G l indicates the weight of the gas-liquid mixture removed from the storage tank in the time t, in this case nitrogen.
  • the throughput is given by m l
  • G 2 gives the weight of the in at the same time t in the phase separator separated liquid nitrogen.
  • the throughput and the pressure in the phase separator, that is to say in the insulated container 1, are represented by m 2 and P 2 .
  • a high proportion of gas was achieved by greatly reducing the pressure in the insulated container 1 and additionally heating an evaporator coil used on a trial basis.
  • the device works just as well if the gas portion is generated essentially only by supplying heat to the supply line 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP78100720A 1977-09-24 1978-08-22 Séparateur des vapeurs émanant des gaz liquéfiés à basse température, lors de leur transfert Withdrawn EP0001392A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2743131 1977-09-24
DE2743131 1977-09-24

Publications (1)

Publication Number Publication Date
EP0001392A1 true EP0001392A1 (fr) 1979-04-18

Family

ID=6019845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100720A Withdrawn EP0001392A1 (fr) 1977-09-24 1978-08-22 Séparateur des vapeurs émanant des gaz liquéfiés à basse température, lors de leur transfert

Country Status (3)

Country Link
EP (1) EP0001392A1 (fr)
ES (1) ES473412A1 (fr)
IT (1) IT1098870B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2923078A1 (de) * 1979-06-07 1980-12-11 Messer Griesheim Gmbh Vorrichtung zum abtrennen des bei der foerderung tiefsiedender verfluessigter gase verdampfenden gases
DE3148426A1 (de) * 1981-12-08 1983-06-23 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Fluessigkeits-gas-phasentrenner
US4546609A (en) * 1983-05-30 1985-10-15 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Apparatus for providing a continuous stream of a cryogenic liquid and in particular liquid nitrogen
DE19717267A1 (de) * 1997-04-24 1998-10-29 Asea Brown Boveri Verfahren zur Aufbereitung von tiefgekühltem Flüssiggas
EP0999401A2 (fr) * 1998-11-05 2000-05-10 Messer Griesheim Gmbh Tête de soutirage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970604A (en) * 1958-06-24 1961-02-07 Conch Int Methane Ltd Liquid storage tanks and attachments
US3206939A (en) * 1962-12-26 1965-09-21 Union Carbide Corp Cryogenic fluid transfer system
US3938347A (en) * 1974-04-12 1976-02-17 Optical Coating Laboratory, Inc. Level control apparatus and method for cryogenic liquids

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2970604A (en) * 1958-06-24 1961-02-07 Conch Int Methane Ltd Liquid storage tanks and attachments
US3206939A (en) * 1962-12-26 1965-09-21 Union Carbide Corp Cryogenic fluid transfer system
US3938347A (en) * 1974-04-12 1976-02-17 Optical Coating Laboratory, Inc. Level control apparatus and method for cryogenic liquids

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2923078A1 (de) * 1979-06-07 1980-12-11 Messer Griesheim Gmbh Vorrichtung zum abtrennen des bei der foerderung tiefsiedender verfluessigter gase verdampfenden gases
DE3148426A1 (de) * 1981-12-08 1983-06-23 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Fluessigkeits-gas-phasentrenner
US4546609A (en) * 1983-05-30 1985-10-15 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Apparatus for providing a continuous stream of a cryogenic liquid and in particular liquid nitrogen
DE19717267A1 (de) * 1997-04-24 1998-10-29 Asea Brown Boveri Verfahren zur Aufbereitung von tiefgekühltem Flüssiggas
US6079222A (en) * 1997-04-24 2000-06-27 Asea Brown Boveri Ag Method for preparing deep-frozen liquid gas
DE19717267B4 (de) * 1997-04-24 2008-08-14 Alstom Verfahren zur Aufbereitung von tiefgekühltem Flüssiggas
EP0999401A2 (fr) * 1998-11-05 2000-05-10 Messer Griesheim Gmbh Tête de soutirage
EP0999401A3 (fr) * 1998-11-05 2001-03-28 Messer Griesheim Gmbh Tête de soutirage

Also Published As

Publication number Publication date
ES473412A1 (es) 1979-05-16
IT1098870B (it) 1985-09-18
IT7827875A0 (it) 1978-09-20

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Inventor name: VOLKER, WOLFGANG

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Inventor name: BUCHMUELLER, JUERGEN