WO1990015003A1 - Arrangement for a storage of a cold liquid - Google Patents

Arrangement for a storage of a cold liquid Download PDF

Info

Publication number
WO1990015003A1
WO1990015003A1 PCT/SE1990/000389 SE9000389W WO9015003A1 WO 1990015003 A1 WO1990015003 A1 WO 1990015003A1 SE 9000389 W SE9000389 W SE 9000389W WO 9015003 A1 WO9015003 A1 WO 9015003A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
lid
space
arrangement
storage
Prior art date
Application number
PCT/SE1990/000389
Other languages
French (fr)
Inventor
Peter Margen
Original Assignee
Peter Margen
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 Peter Margen filed Critical Peter Margen
Publication of WO1990015003A1 publication Critical patent/WO1990015003A1/en

Links

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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0362—Thermal insulations by liquid means
    • 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
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0678—Concrete
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • 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
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/033—Treating the boil-off by recovery with cooling
    • F17C2265/034—Treating the boil-off by recovery with cooling with condensing the gas phase
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0142—Applications for fluid transport or storage placed underground
    • F17C2270/0144—Type of cavity
    • F17C2270/0155—Type of cavity by using natural cavities

Definitions

  • the present invention relates to an arrangement for a storage of a cold liquid, which consists of a condensed gas, as defined in the preamble of claim 1.
  • a condensed gas encompasses liquefied natural gas (LNG) , lique ⁇ fied petroleum gas (LPG) , ammonia, etc.
  • this gas storage takes the form of stored liquefied natural gas (LNG) rather than gas in the gas phase, in order to reduce the storage volume.
  • LNG liquefied natural gas
  • the storage has to be thermally insulated from the surroundings by a layer of suitable insulation material such as mineral wool, or cellular plastic.
  • suitable insulation material such as mineral wool, or cellular plastic.
  • Such an insulation can never be perfect, and heat will therefore be transferred from the surroundings to the liquid, causing some liquid to be evaporated, a phenomen known as "bomen known as "boil-off". In the space above the liquid, this vapour becomes superheated to some extent due to heat intake from the surroundings.
  • the object of the invention is to achieve an arrange- ent which results in a substantial reduction in the quantity of liquid that is evaporated by the heat trans ⁇ fer from the surroundings (i.e. the boil-off) for a given insulation of the storage and, in addition, a reduction in the superheating of the evaporated liquid, in order to reduce the refrigeration energy which must be expended to cool and recondense the evaporated liquid.
  • Figure 1 shows a conventional storage for liquefied gas and the essential components of such a storage
  • Figure 2 shows an embodiment of a storage with an arrange- ment according to the invention
  • Figure 3 shows a simplified rock cavern storage with an arrangement in accordance with the invention
  • Figure 4 shows a detail of the arrangement according to Figure 3.
  • Figure 1 illustrates a conventional storage for liquefied gas, including a gas tight vessel 1, for instance a steel vessel, which has a surrouding heat insulating layer 2.
  • a gas tight vessel for instance a steel vessel, which has a surrouding heat insulating layer 2.
  • Liquefied ( condensed) gas with a free liquid surface
  • the unavoidable heat intake through the insulation re ⁇ sults in some evaporation of liquid, and this vapour reaches the space l 1 above the liquid surface of the vessel 1.
  • the evaporated vapour is evacuated from the vessel by a fan 6 mounted in a pipe 5 inserted in the upper part of the vessel 1 and is fed to the refrigeration machine 7 for cooling and condensing the vapour, from which the condensate is fed back to the vessel during the charging period.
  • the vapour formed is evacuated by the fan 6 and a pipe 8 which is connected to the main gas pipe line not shown in the figure.
  • the above mentioned heat transfer to the liquid in the vessel consists of two components, namely a) heat transferred .through the insulation below the free surface 3' of the liquid, b) heat transferred through the insulation to the vapour in the vessel in the space 1 ' above the free surface 3' of the liquid, whereby the vapour becomes superheated, which results in heat trans ⁇ fer from the superheated vapour to the liquid sur ⁇ face 3 ' , and thereby further evaporation of the liquid 3.
  • heat transfer of type b) from the superheated vapour in the space 1 ' to the liquid sur ⁇ face is avoided as far as possible by introduding a lid 9 ( Figures 2-4) floating on floats 10 attached to the lower surface of the lid, thereby creating a free space for vapour between the lower surface 9 ' of the lid and the free surface of the liquid.
  • This space is much less in volume than the space 1 * ' in conventional storage volumes in accordance with Figure 1 , and the quantity of vapour in that space can be kept at a minimum.
  • the space l 1 under the lid 9 in Figure 2 is connected by a flexible pipe 11 to the evacuation pipe 5 and fan 6.
  • the flexible pipe can, for instance, consist of a hose of expandable material, permitting bending of the hose and vertical movement of the lid.
  • the lid 9 is preferably made of a heat insulating material, such as cellular plas ⁇ tic, which is placed on a gas tight and structurally strong thin membrane, for instance a steel plate.
  • the floats 10, which, for instance, may be cupshaped, can be .gas tight thinwalled containers of steel or plastic, and are fastened to the lower surface 9 1 of the lid 9.
  • vapour (boil-off) is formed by heat transfer through the wall insulation 2 below the free liquid durface 3 ' , the vapour fills the gap or space 1" between the free liquid surface and the lower surface 9' of the lid, and is evacuated from this space by the fan 6 through the flexible pipe 11 and pipe 5, being then led to the refri ⁇ geration machine 7 for recondensing the vapour, or to the main gas pipe line not shown in the figure.
  • the vapour (boil-off) formed cannot reach the space above the lid 9, and can therefore not become superheated and result in additional formation of vapour (boil-off) by process b) previously described.
  • the vapour pressure in the space above the liquid surface is maintained at approximately atmospheric pressure by the fan 6, but also other set pressures can be selected.
  • the advantages obtained by the arrangement described above are self-evident.
  • the contribution b) to evaporation (boil-off) caused by heat transfer from the vapour space ot the free surface of the liquid is practically eliminated, and the vapour which is led to the refrigeration machine 7 for condensation is not super- heated, and therefore requires minimal cooling , if any, prior to condensation.
  • These two factors contribute to minimising the amount of cooling energy and the refri ⁇ geration work which has to be expended to cool and recon- dense the vapour (boil-off) formed during the charging period for the storage.
  • the flexible pipe 11 can be a hose, but it could obviously alternatively be given a telescopic design or contain a bellow to allow the vertical motions of the lid.
  • Figure 3 shows an underground storage, for instance in a rock cavern.
  • the walls of the cavern have been fitted with an intermediate layer of concrete or sand 14, and on the inside of this, an insulation, 2.
  • the flange 13 of the floating lid 9 is desirable to make so high, that it at least corresponds to the vertical distance between the corrugations or bellows 16 in the mem brane 15, which have the function of absorbing contraction and expansion of the membrane on cooling from ambient tem ⁇ peratures to the temperature of the liquid (e.g. -162 C fo natural gas) and on heating to ambient temperature, respec tively.
  • the gap between the walls of the storage and the lid 9 is kept at a minimum by cooperation between the annu lar corrugations and the flange 13.
  • the lid 9 can have any shape made desirable by the shape of the storage and can for instance be circular or right- angled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention relates to an arrangement for a storage of a cold liquid which consists of a condensed gas, e.g. liquefied natural gas, contained in a heat insulated vessel (1), which includes extraction means (5, 6) for removing the evaporated liquid (3') which is present above the free surface of the liquid. According to the invention a lid (9) is floating on the free surface of the liquid and forms an evaporation space (1') between the lid (9) and the free surface of the liquid having a substantially constant volume and that the extraction means (5, 6) are arranged to remove the evaporated liquid from the evaporation space (1') and to maintain the pressure within said space at a substantially constant value.

Description

ARRANGEMENT FOR A STORAGE OF A COLD LIQUID
The present invention relates to an arrangement for a storage of a cold liquid, which consists of a condensed gas, as defined in the preamble of claim 1.
The term "a condensed gas" as used here and in the claims encompasses liquefied natural gas (LNG) , lique¬ fied petroleum gas (LPG) , ammonia, etc.
In distribution systems for natural gas, for instance, gas storages are often used to even out variations in the gas demand. In certain cases, this gas storage takes the form of stored liquefied natural gas (LNG) rather than gas in the gas phase, in order to reduce the storage volume. Because of the low temperature of condensation of the usual condensed gases, e.g. -162 C for natural gas at atmospheric pressure, the storage has to be thermally insulated from the surroundings by a layer of suitable insulation material such as mineral wool, or cellular plastic. Such an insulation can never be perfect, and heat will therefore be transferred from the surroundings to the liquid, causing some liquid to be evaporated, a phenomen known as "boil-off". In the space above the liquid, this vapour becomes superheated to some extent due to heat intake from the surroundings.
Evaporation (= "boil-off") which takes place during the period in which the storage is being charged, i.e. being filled with condensed gas, must be compensated by cooling and recondensing the vapour formed through heat intake through the insulation, in order to achieve a storage completely filled by liquid at the end of the charging operation.
The object of the invention is to achieve an arrange- ent which results in a substantial reduction in the quantity of liquid that is evaporated by the heat trans¬ fer from the surroundings (i.e. the boil-off) for a given insulation of the storage and, in addition, a reduction in the superheating of the evaporated liquid, in order to reduce the refrigeration energy which must be expended to cool and recondense the evaporated liquid.
This object is fully achieved by the invention defined in the claims and described below by reference to the attached figures, in which,
Figure 1 shows a conventional storage for liquefied gas and the essential components of such a storage, Figure 2 shows an embodiment of a storage with an arrange- ment according to the invention,
Figure 3 shows a simplified rock cavern storage with an arrangement in accordance with the invention, and Figure 4 shows a detail of the arrangement according to Figure 3.
Figure 1 illustrates a conventional storage for liquefied gas, including a gas tight vessel 1, for instance a steel vessel, which has a surrouding heat insulating layer 2. Liquefied (= condensed) gas with a free liquid surface
3' is contained in the storage. Through pipe 4 gas cooled to liquefied state is fed into the lower regions of the storage during the charging operation of the storage or is removed from the storage during the discharge ope- ration, whereby the liquid level 3' is raised or lowered, respectively.
The unavoidable heat intake through the insulation re¬ sults in some evaporation of liquid, and this vapour reaches the space l1 above the liquid surface of the vessel 1. The evaporated vapour is evacuated from the vessel by a fan 6 mounted in a pipe 5 inserted in the upper part of the vessel 1 and is fed to the refrigeration machine 7 for cooling and condensing the vapour, from which the condensate is fed back to the vessel during the charging period. During the discharge period of the storage, the vapour formed is evacuated by the fan 6 and a pipe 8 which is connected to the main gas pipe line not shown in the figure.
The above mentioned heat transfer to the liquid in the vessel consists of two components, namely a) heat transferred .through the insulation below the free surface 3' of the liquid, b) heat transferred through the insulation to the vapour in the vessel in the space 1 ' above the free surface 3' of the liquid, whereby the vapour becomes superheated, which results in heat trans¬ fer from the superheated vapour to the liquid sur¬ face 3 ' , and thereby further evaporation of the liquid 3.
According to the invention, heat transfer of type b) from the superheated vapour in the space 1 ' to the liquid sur¬ face is avoided as far as possible by introduding a lid 9 (Figures 2-4) floating on floats 10 attached to the lower surface of the lid, thereby creating a free space for vapour between the lower surface 9 ' of the lid and the free surface of the liquid. This space is much less in volume than the space 1*' in conventional storage volumes in accordance with Figure 1 , and the quantity of vapour in that space can be kept at a minimum.
The space l1 under the lid 9 in Figure 2 is connected by a flexible pipe 11 to the evacuation pipe 5 and fan 6. The flexible pipe can, for instance, consist of a hose of expandable material, permitting bending of the hose and vertical movement of the lid. The lid 9 is preferably made of a heat insulating material, such as cellular plas¬ tic, which is placed on a gas tight and structurally strong thin membrane, for instance a steel plate. The floats 10, which, for instance, may be cupshaped, can be .gas tight thinwalled containers of steel or plastic, and are fastened to the lower surface 91 of the lid 9.
When vapour (boil-off) is formed by heat transfer through the wall insulation 2 below the free liquid durface 3 ' , the vapour fills the gap or space 1" between the free liquid surface and the lower surface 9' of the lid, and is evacuated from this space by the fan 6 through the flexible pipe 11 and pipe 5, being then led to the refri¬ geration machine 7 for recondensing the vapour, or to the main gas pipe line not shown in the figure. Hence the vapour (boil-off) formed, cannot reach the space above the lid 9, and can therefore not become superheated and result in additional formation of vapour (boil-off) by process b) previously described.
Preferably the vapour pressure in the space above the liquid surface is maintained at approximately atmospheric pressure by the fan 6, but also other set pressures can be selected. The advantages obtained by the arrangement described above are self-evident. The contribution b) to evaporation (boil-off) caused by heat transfer from the vapour space ot the free surface of the liquid is practically eliminated, and the vapour which is led to the refrigeration machine 7 for condensation is not super- heated, and therefore requires minimal cooling , if any, prior to condensation. These two factors contribute to minimising the amount of cooling energy and the refri¬ geration work which has to be expended to cool and recon- dense the vapour (boil-off) formed during the charging period for the storage. Apart from this, the flow rate of continuously extracted vapour during the charging period is reduced. So as to further reduce possible convection of vapour between the space 1' and the vapour space above the lid 9 through the gap 12, the outer edge of the lid is fitted with a flange 13. In the above description it is stated that the flexible pipe 11 can be a hose, but it could obviously alternatively be given a telescopic design or contain a bellow to allow the vertical motions of the lid.
Figure 3 shows an underground storage, for instance in a rock cavern. The walls of the cavern have been fitted with an intermediate layer of concrete or sand 14, and on the inside of this, an insulation, 2. On the inside of the insulation 2 there is preferably a liquid tight membrane 15 (figure 4) .
To reduce the costs one can refrain from insulating the ceiling of the cavern, so.'that the rock cavern ceiling will be in contact with stationary vapour, without cooling by saturated vapour from boil-off.
It is desirable to make the flange 13 of the floating lid 9 so high, that it at least corresponds to the vertical distance between the corrugations or bellows 16 in the mem brane 15, which have the function of absorbing contraction and expansion of the membrane on cooling from ambient tem¬ peratures to the temperature of the liquid (e.g. -162 C fo natural gas) and on heating to ambient temperature, respec tively. The gap between the walls of the storage and the lid 9 is kept at a minimum by cooperation between the annu lar corrugations and the flange 13.
The lid 9 can have any shape made desirable by the shape of the storage and can for instance be circular or right- angled.

Claims

C L A I M S
1. Arrangement for a storage of a cold liquid which con¬ sists of a condensed gas and is contained in a heat in- sulated vassel (1) , or similar storage space, which in¬ cludes extraction means (5,6) for removing the evaporated liquid (31) which is present above the free surface of the liquid, c h a r a c t e r i z e d in that a lid (9) is floating on the free surface of the liquid and forms an evaporation space (1') between the lid (9) and the free surface of the liquid having a substantially con¬ stant volume and that the extraction means (5,6) are arranged to remove the evaporated liquid from the eva¬ poration space (1') and to maintain the pressure within said space at a substantially constant value.
2. Arrangement in accordance with claim 1, c h a ¬ r a c t e r i z e d in the lid (9) being provided with a vertical flange (13) along the periphery thereof, which forms a narrow gap (12) together with the inner walls of the vessel.
3. Arrangement in accordance with claim 1, c h a ¬ r a c t e r i z e d in that the lid (9) is heat in- sulating.
4. Arrangement in accordance with claim 1 or 2, c h a ¬ r a c t e r i z e d in that the vessel is lined by a liquid tight membrane, (15) which has corrugations (16) orientated towards the inside of the vessel, and that the flange (13) has a height of at least that of the vertical distance between two corrugations (16) .
5. Arrangement according to any of claims 1-4, c h a - r a c t e r i z e d in that the extraction means (5,6) are set to maintain the evaporation space (1') at sub¬ stantially atmospheric pressure.
PCT/SE1990/000389 1989-06-05 1990-06-05 Arrangement for a storage of a cold liquid WO1990015003A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8902035-8 1989-06-05
SE8902035A SE463814B (en) 1989-06-05 1989-06-05 DEVICE AT A STORE BEING COLD WASHING

Publications (1)

Publication Number Publication Date
WO1990015003A1 true WO1990015003A1 (en) 1990-12-13

Family

ID=20376190

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1990/000389 WO1990015003A1 (en) 1989-06-05 1990-06-05 Arrangement for a storage of a cold liquid

Country Status (2)

Country Link
SE (1) SE463814B (en)
WO (1) WO1990015003A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029741B (en) * 1953-05-22 1958-05-08 Hammond Iron Works Storage container with a floating lid
DE1200745B (en) * 1960-03-07 1965-09-09 British Petroleum Co Floating cover for containers for the storage of volatile liquids
US3228551A (en) * 1961-12-08 1966-01-11 Union Tank Car Co Inflatable seal for floating roof
US4130216A (en) * 1977-04-05 1978-12-19 Altech Industries, Inc. Peripheral seal for floating roofs
DE3024461A1 (en) * 1980-06-28 1982-01-21 Manfred 2080 Pinneberg Hadamla Covering for material stored in containers - consists of separating foil edge of which forms sealing attachment to inner wall and made in form permitting adjustment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029741B (en) * 1953-05-22 1958-05-08 Hammond Iron Works Storage container with a floating lid
DE1200745B (en) * 1960-03-07 1965-09-09 British Petroleum Co Floating cover for containers for the storage of volatile liquids
US3228551A (en) * 1961-12-08 1966-01-11 Union Tank Car Co Inflatable seal for floating roof
US4130216A (en) * 1977-04-05 1978-12-19 Altech Industries, Inc. Peripheral seal for floating roofs
DE3024461A1 (en) * 1980-06-28 1982-01-21 Manfred 2080 Pinneberg Hadamla Covering for material stored in containers - consists of separating foil edge of which forms sealing attachment to inner wall and made in form permitting adjustment

Also Published As

Publication number Publication date
SE463814B (en) 1991-01-28
SE8902035L (en) 1990-12-06
SE8902035D0 (en) 1989-06-05

Similar Documents

Publication Publication Date Title
US2682154A (en) Storage of liquefied gases
US2350348A (en) Heat transfer device
US2889953A (en) Insulated tank with impervious lining
US3485054A (en) Rapid pump-down vacuum chambers incorporating cryopumps
US4292062A (en) Cryogenic fuel tank
KR840000358B1 (en) Stored cryogenic refrigeration device
US3066222A (en) Infra-red detection apparatus
JPH08320099A (en) Equipment and method of adjusting temperature of cryogenic fluid
US20160305610A1 (en) Low heat loss cryogenic liquid container
US3246479A (en) Heat-insulated tank having tank contents refrigerating, foundation warming, and loading and unloading systems
KR101822263B1 (en) Low thermal liquid storage tank with a detachable cryocooler
US2677938A (en) Vacuum-insulated container and process for evacuating same
KR102282181B1 (en) Gas liquefaction apparatus
JP2000130696A (en) Method for preventing evaporation of liquefied gas stored in nonpermeable and isothermal tank and executing device therefor
US2938360A (en) Anhydrous ammonia storage tank
US6029473A (en) Process and installation for filling a reservoir under pressure
WO1990015003A1 (en) Arrangement for a storage of a cold liquid
US4272970A (en) Compression refrigeration system
KR102244318B1 (en) Direct type liquefaction system and liquefaction process
US4364235A (en) Helium-cooled cold surface, especially for a cryopump
US2073741A (en) Refrigerating apparatus
KR20110074169A (en) Lng supplying system
RU2743874C1 (en) Device for storage of liquefied gases
US3318104A (en) Method and apparatus for storing low-boiling liquids
US5878595A (en) Compact portable icemaker

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LU NL SE