WO2024100337A1 - Système de stockage et/ou de transport d'un gaz naturel à l'état liquide - Google Patents
Système de stockage et/ou de transport d'un gaz naturel à l'état liquide Download PDFInfo
- Publication number
- WO2024100337A1 WO2024100337A1 PCT/FR2023/051649 FR2023051649W WO2024100337A1 WO 2024100337 A1 WO2024100337 A1 WO 2024100337A1 FR 2023051649 W FR2023051649 W FR 2023051649W WO 2024100337 A1 WO2024100337 A1 WO 2024100337A1
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- Prior art keywords
- space
- pressure
- storage
- safety device
- transport system
- 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.)
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Classifications
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- 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
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
- F17C3/025—Bulk storage in barges or on ships
- F17C3/027—Wallpanels for so-called membrane tanks
-
- 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
- F17C13/004—Details of vessels or of the filling or discharging of vessels for large 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0147—Shape complex
- F17C2201/0157—Polygonal
-
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/052—Size large (>1000 m3)
-
- 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
- F17C2203/068—Special properties of materials for vessel walls
- F17C2203/069—Break point in the wall
-
- 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
- F17C2205/0311—Closure means
- F17C2205/0314—Closure means breakable, e.g. with burst discs
-
- 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
- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
- F17C2250/0434—Pressure difference
-
- 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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/06—Controlling or regulating of parameters as output values
- F17C2250/0605—Parameters
- F17C2250/0626—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
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/011—Improving strength
-
- 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
- F17C2270/0102—Applications for fluid transport or storage on or in the water
- F17C2270/0105—Ships
- F17C2270/0107—Wall panels
Definitions
- the present invention relates to the field of systems for storing and/or transporting a gas maintained in the liquid state at low temperature and atmospheric pressure, said system comprising at least one tank placed inside a vessel. transportation. Its purpose is such a storage and/or transport system.
- Liquefied natural gas commonly known by the acronym “LNG”, or even by the acronym “LNG” for “Liquefied Natural Gas”
- LNG Liquefied Natural Gas
- the LNG is maintained in liquid form inside the tank to increase the quantity of gas transported, the LNG then occupying 1/ 600th of the volume that it would occupy in the gaseous state, thus making it easier to transport one site to another.
- the tank is also capable of maintaining the LNG in the liquid state at very low temperature, in particular at a temperature below -163°C, the temperature at which the LNG is in liquid form at atmospheric pressure.
- Such an LNG tank can also be used as a fuel tank for some ships. In other words, these ships load and store LNG in a tank, then subsequently use the LNG as fuel.
- Each tank delimits a main space which is intended to contain the LNG.
- the tank comprises at least a first space and a second space between which a sealing membrane is interposed.
- the first space forms a thermal insulation space of the second space.
- the sealing membrane which is provided to ensure a sealing between the first space and the second space, then the second space.
- the tank is likely to include two sealing membranes, including a primary sealing membrane housed inside a secondary sealing membrane.
- a storage and/or transport system comprising the tank of the transport vessel, the storage and/or transport system being capable of protecting the sealing membrane, whether single or primary. and/or secondary.
- the present invention fits into this context and proposes a system for storing and/or transporting a gas in the liquid state comprising at least one tank which delimits a main space intended to contain a gas in the liquid state, for example liquefied natural gas.
- the tank comprises at least a first space, a second space and at least one sealing membrane interposed between the first space and the second space, the first space constituting a thermal insulation space of the second space.
- the storage and/or transport system comprises a safety device which maintains a seal between the first space and the second space when a first pressure prevailing inside the first space is lower than a second pressure prevailing inside the second space, and which places the first space in fluidic relation with the second space when the first pressure is greater than the second pressure.
- the safety device is designed to resist a pressure present in the second space when this is greater than the pressure prevailing in the first space.
- the safety device puts the two spaces into fluidic relationship when the pressure in the second space is lower than the pressure in the first space, in particular by a value at least equal to 35 mbarg, for example equal to 45 mbarg + /- 9 mbarg. This avoids any separation or tearing of the waterproofing membrane, the latter ensuring a separation between a volume of the first space and a volume of the second space.
- the safety device places the first space in fluidic relation with the second space when the first pressure is greater than the second pressure by a value at least equal to 35 mbarg, possibly 50 mbarg.
- said value is for example equal to 45 mbarg +/- 9 mbarg.
- the main space constitutes the second space, the first space being a thermally insulating layer surrounding the second space.
- the tank is provided with a single insulating thermal layer which forms the first space, the second space then being the internal volume of the tank, that is to say that which receives the fluid to be transported and/or or to store.
- the storage and/or transport system comprises a second thermally insulating layer which surrounds the first space, that is to say the thermally insulating layer surrounding the main space.
- the second space is a first thermally insulating layer surrounding the main space, the first space being a second thermally insulating layer surrounding the second space.
- the tank is provided with two layers of thermal insulation superimposed one on the other and which both surround the main space intended to contain and/or store the fluid.
- each layer is formed of an insulating mass.
- the safety device comprises a pipe fluidly connecting the first space and the second space.
- the safety device comprises at least one cover which is capable of breaking as soon as the first pressure exceeds the second pressure, for example by a value at least equal to 35 mbarg, for example equal to 45 mbarg +/- 9 mbarg.
- the safety device comprises a first flange and a second flange connected to each other by assembly means, the cover being interposed between the first flange and the second flange, the first flange and the second flange jointly delimiting a channel which at least partially houses the cover.
- the first flange is housed inside the first space and the second flange is placed inside the second space.
- the safety device comprises at least a plurality of plates connected to each other and forming at least part of the sealing membrane, the safety device comprising at least least one breaking member intended to break the tightness of the sealing membrane so as to put the first space into fluidic relationship with the second space.
- the plurality of plates comprises at least one central plate and at least two side plates welded to the central plate via side welds, the rupture member comprising at least one of the side welds.
- the connection between the first space and the second space is carried out by a rupture of at least one of the side welds.
- a central weld can connect the central plate to an insulating mass constituting the first space or the second space.
- the central weld then forms a fixing point for the plates, the latter having a tendency to deform around this fixing point, until breaking the lateral weld.
- the plurality of plates comprises at least one central plate and at least two side plates welded to the central plate via side welds, each side plate consisting of two elementary plates connected to one another. the other by an upper plate via upper welds, the rupture member comprising at least one of the upper welds.
- a central weld connects the central plate to an insulating mass constituting the first space or the second space.
- the breaking member can thus be produced only by the side weld, only by the upper weld, or by a combination of these two welds.
- the rupture member comprises at least one thinning zone provided in at least one of the plates of the plurality of plates.
- the thinning zone comprises a groove formed on an upper face and/or on a lower face of at least one of the plates of the plurality of plates, for example one of the side plates.
- the present invention also relates to a transport vessel comprising at least one such storage and/or transport system, that is to say which comprises at least one tank and a safety device as explained in the present document.
- the present invention also relates to a method of securing at least one tank of a transport vessel implemented by such a storage and/or transport system, the securing method comprising a step of maintaining a seal between the first space and the second space when a first pressure prevailing inside the first space is lower than a second pressure prevailing inside the second space, the method security comprising a step of fluidically connecting the first space with the second space via the safety device when the first pressure is greater than the second pressure, for example by a value at least equal to 35 mbarg, in particular a value equal to at 45 mbarg +/- 9 mbarg.
- FIG. 1 is a side view of a transport vessel intended to be equipped with a system for storing and/or transporting a gas in the liquid state according to the present invention
- FIG. 2 is a schematic sectional view of a first alternative embodiment of the storage and/or transport system fitted to the transport vessel shown in Figure 1.
- FIG. 3 is a schematic sectional view of a second alternative embodiment of the storage and/or transport system fitted to the transport vessel shown in Figure 1.
- FIG. 4 is a schematic sectional view of a third alternative embodiment of the storage and/or transport system fitted to the transport vessel shown in Figure 1.
- FIG. 5 is a schematic sectional view of a fourth alternative embodiment of the storage and/or transport system fitted to the transport vessel shown in Figure 1.
- FIG. 6 is a schematic sectional view of a fifth alternative embodiment of the storage and/or transport system fitted to the transport vessel shown in Figure 1.
- FIG. 7 is a schematic sectional view of a sixth alternative embodiment of the storage and/or transport system fitted to the transport vessel shown in Figure 1.
- FIG. 8 is a sectional and perspective view of a first embodiment of a security device constituting one of the storage and/or transport systems shown in Figures 2 to 7.
- FIG. 9 is a sectional view of the safety device illustrated in Figure 8.
- FIG. 10 is a schematic sectional view of a first variant of a second embodiment of a safety device constituting one of the storage and/or transport systems shown in Figures 2 to 7.
- FIG. 11 is a schematic view of a section of a second variant of the second embodiment of the safety device illustrated in Figure 10.
- FIG. 12 is a schematic view of a section of a third variant of the second embodiment of the safety device illustrated in Figure 10.
- FIG. 13 is a schematic view of a section of a fourth variant of the second embodiment of the safety device illustrated in Figure 10.
- FIG. 14 is a schematic view of a section of a fifth variant of the second embodiment of the safety device illustrated in Figure 10.
- FIG. 15 is a schematic view of a section of a sixth variant of the second embodiment of the safety device illustrated in Figure 10.
- characteristics, variants and different embodiments of the invention can be associated with each other, in various combinations, to the extent that they are not incompatible or exclusive with respect to each other.
- variants of the invention comprising only a selection of characteristics described subsequently in isolation from other characteristics, if this selection of characteristics is sufficient to confer a technical advantage and/or to differentiate the invention from the prior art.
- Figure 1 a transport ship 1, such as an LNG tanker or the like, which has four tanks 3, one of these tanks 3 being made visible here to facilitate understanding.
- the tanks 3 are waterproof and thermally insulating and are configured for the transport and/or storage of liquefied natural gas.
- the transport vessel 1 can be arranged to only store and transport liquefied natural gas, or to use it as fuel for the operation of the transport vessel 1. It is understood that the present invention applies to a transport vessel. 1 which comprises an indifferent number of tanks 3, either a single tank 3, or a plurality of tanks 3.
- the transport vessel 1 comprises a hull 2 comprising at least one outer hull 4 and an inner hull 6, between which extend a plurality of stiffeners 8.
- the outer hull 4 is in contact with the external environment of the transport vessel 1 , generally a maritime and/or river environment.
- the internal shell 6 extends at a distance from this external shell 4 and houses the tank 3 or tanks 3.
- Each tank 3 comprises a main space 20 which is intended to contain the liquefied natural gas.
- the transport vessel 1 is equipped with a storage and/or transport system 30 for liquefied natural gas which comprises the tank 3 and a safety device 12 configured to protect the tank 3 against any separation or tearing of membrane.
- the safety device 12 is arranged to avoid any damage in the event that at least one safety condition relating to one or more pressure states inside the tank 3 is not or no longer met.
- the tank 3 comprises at least one sealing membrane 10, 10a, 10b which is interposed between a first space 21 and a second space 22, the first space 21 housing the second space 22.
- the first space 21 is located closer to the internal shell 6 of the tank 3 than the second space 22.
- the tank 3 is equipped with the safety device 12 capable of protecting the sealing membrane 10, 10a, 10b which the tank 3 comprises against any differential of pressure which would imply a deformation of the membrane towards the main space 20 of the tank 3.
- the safety device 12 maintains a seal between the first space 21 and the second space 22 when a first pressure PI prevailing inside the first space 21 is lower than a second pressure P2 reigning inside the second space 22, and the safety device 12 places the first space 21 in fluid relationship with the second space 22 when the first pressure P 1 is greater than the second pressure P2.
- a fluid connection occurs by triggering the safety device 12, for example following the rupture of a rupture member of the safety device 12.
- Such a rupture occurs when the first pressure PI is greater than the second pressure P2 with a value at least equal to 35 mbarg, and for example equal to 45 mbarg +/- 9 mbarg or 50 mbarg.
- the safety device 12 acts like a fuse by authorizing fluid communication between the first space 21 and the second space 22.
- the sealing membrane 10, 10a, 10b undergoes an external excess pressure relative to the main volume which receives the gas in the liquid state, the seal provided by the sealing membrane 10, 10a, 10b is broken, to release this excess pressure and evacuate it towards the second space 22, which makes it possible to balance the pressures on either side of the membrane and therefore to guarantee an absence of deformation.
- the safety device 12 is arranged in distinct locations, while ensuring the function described above overall. variants of layout and arrangement of the safety device 12 described below.
- the tank 3 comprises a single sealing membrane 10 which separates and delimits the first space 21 with respect to the second space 22. Otherwise said, starting from the outside of the tank 3 towards the inside of the tank 3, we encounter the first space 21, which forms a thermally insulating layer of the main space 20, then the single sealing membrane 10, which is designed to ensure a perfect seal between the first space 21 and the second space 22, then the second space 22 which is made up of the main space 20 containing the liquefied natural gas.
- the first space 21 comprises an insulating mass formed of thermally insulating panels.
- the safety device 12 equips the single sealing membrane 10.
- the safety device 12 is provided directly on the single sealing membrane 10 and is therefore part of this single sealing membrane 10
- the safety device is here in the plane of one of the walls which constitute the sealing membrane.
- the safety device 12 equips a first pipe 13a which fluidly connects the first space 21 and the second space 22.
- the first pipe 13a extends between a first intake mouth 14a housed at the interior of the first space 21 and a first evacuation mouth 14b housed inside the second space 22, and the safety device 12 equips the first pipe 13a between the first inlet mouth 14a and the first evacuation mouth 14b .
- the safety device 12 can be placed on the deck of the ship.
- the tank 3 comprises a primary sealing membrane 10a housed at a distance from a secondary sealing membrane 10b. Starting from the outside of the tank 3 towards the inside of the tank 3, we encounter a thermally insulating layer of the main space 20, then the secondary sealing membrane 10b, then another thermally insulating layer of the main space 20, then the primary sealing membrane 10a delimiting the main space 20 containing the liquefied natural gas.
- the thermally insulating layer of the main space 20, located between the internal shell 6 and the secondary sealing membrane 10b will subsequently be called secondary thermally insulating layer 48 and the other thermally insulating layer located between the secondary sealing membrane 10b and the primary sealing membrane 10a will subsequently be called primary thermally insulating layer 49.
- Each layer includes an insulating mass formed of thermally insulating panels.
- the safety device 12 equips the primary sealing membrane 10a.
- the safety device 12 is provided directly on the primary sealing membrane 10a.
- the safety device is here in the plane of one of the walls which constitute the primary sealing membrane 10a.
- the secondary sealing membrane 10b does not have a safety device 12.
- the first space 21 is interposed between the secondary sealing membrane 10b and the primary sealing membrane 10a .
- the second space 22 consists of the main space 20 containing the liquefied natural gas.
- the safety device 12 equips the secondary sealing membrane 10b.
- the safety device 12 is provided directly on the secondary sealing membrane 10b.
- the safety device is here in the plane of one of the walls which constitute the secondary sealing membrane 10b.
- the primary sealing membrane 10a does not have a safety device 12.
- first space 21 is interposed between the internal shell 6 and the secondary sealing membrane 10b.
- the second space 22 consists of the space located between the secondary sealing membrane 10b and the primary sealing membrane 10a.
- the invention covers the case of a tank with double membranes comprising both a first safety device 12 placed on the primary sealing membrane 10a, the latter being interposed between the main space 20 and the thermally primary insulating layer 49, and a second safety device 12 arranged on the secondary sealing membrane 10b, the latter being interposed between the primary thermally insulating layer 49 and the secondary thermally insulating layer 48.
- the safety device 12 equips a second pipe 13b which fluidly connects adjacent spaces, the second pipe 13b extending between a second intake mouth 15a and a second evacuation mouth 15b, the device safety device 12 equipping the second pipe 13b between the second intake port 15a and the second exhaust port 15b.
- the second intake port 15a is arranged inside the first space 21, formed by the secondary thermally insulating layer and the second exhaust port 15b is arranged inside the second space 22 , formed by the primary thermally insulating layer.
- no safety device is provided between the main space 20 and the second space 22.
- the second intake port 15a is arranged inside the primary thermally insulating layer 49 and the second exhaust port 15b is housed inside the main space 20.
- no safety device is provided between the primary thermally insulating layer 49 and the secondary thermally insulating layer 48.
- the invention also covers the case of a double membrane tank provided with two safety devices 12 as shown in Figure 6 and Figure 7.
- the safety device 12 comprises a breaking device 16 interposed between a first flange 17a and a second flange 17b connected to each other by assembly means 18.
- the assembly means are for example bolts.
- the rupture device 16 comprises at least one cover 16a which is able to rupture as soon as the first pressure PI exceeds the second pressure P2.
- the first flange 17a and the second flange 17b jointly delimit a channel 19 which extends between a first outlet 31 delimited by the first flange 17a and a second outlet 32 delimited by the second flange 17b.
- the first outlet 31 is intended to extend inside the first space 21 and that the second outlet 32 is intended to extend inside the second space 22, the cover 16a forming for example a part of the waterproofing membrane.
- the channel 19 at least partially houses the cover 16a and that the flanges 17a, 17b are removable to allow the cover 16a to be replaced when it is broken and thus restore the seal between the first space 21 and the second space 22.
- the safety device 12 comprising a plurality of plates 19a, 19b, 19', 19” welded together and arranged in respective parallel planes between them, even confused. These plates are part of the waterproofing membrane which is equipped with the safety device 12.
- Figures 10 to 15 each include a diagram on the left which shows the state of the membrane when the second pressure P2 is greater than the first pressure PI, that is to say when the safety device 12 maintains the seal between the first space 21 and the second space 22, and a diagram on the right which shows the state of the membrane when the second pressure P2 is lower than the first pressure PI, that is to say when the membrane tends to deform by inflating towards the inside of the tank.
- a state is immediately prior to the fluidic relationship between the volume of the first space 21 and the volume of the second space 22. Once this state has been exceeded, the safety device 12 puts the first space 21 into fluidic relationship with the second space 22, so as to balance the pressures between these spaces.
- the safety device 12 comprises at least one central plate 19a and two side plates 19b, which are welded to the central plate 19a via side welds 41b.
- a central weld 41a joins the central plate 19a to a connecting plate 46 which is secured to the insulating mass of the first space 21.
- the side plates 19b have no mechanical connection with the connecting plate 46, so as to allow their movement.
- each side plate 19b extends in the same plane.
- One end of each side plate 19b locally overlaps the central plate 19a, in a state before rupture of the safety device 12.
- the insulating mass includes a cavity provided in its thickness and facing the main space. This cavity receives at least the connecting plate 46 and the central plate(s) 19a.
- the safety device 12 includes a breaking member 44 which here takes the form of a side weld 41b.
- a breaking member 44 which here takes the form of a side weld 41b.
- the side plate 19b pivots around the side weld 41b under the effect of the pressure differential between the first space 21 and the second space 22, which causes a rupture of this side weld 41b.
- Such pivoting is facilitated by the fact that the central plate 19a is securely attached to the connecting plate 46 by the central weld 41a.
- the safety device 12 comprises at least two central plates 19a and two side plates 19b which are each welded to an adjacent central plate 19a, by means of side welds 41b.
- Two central welds 41a each connect a central plate 19a to the connecting plate 46 of the insulating mass of the first space 21.
- the two side plates 19b extend in the same first plane, while the two central plates 19a extend in the same second plane, this first plane and this second plane being parallel but distinct in a state before rupture of the safety device 12.
- each central plate 19a is connected to the connecting plate 46 by central welds 41a arranged opposite each other.
- the safety device 12 comprises the breaking member 44 which here takes the form of one or more side welds 41b.
- the side plate(s) 19b pivot around the side weld 41b under the effect of the pressure differential between the first space 21 and the second space 22, which causes a rupture of this or these lateral welds 41b.
- Such pivoting is facilitated by the fact that each central plate 19a is individually and securely attached to the connecting plate 46 by central welds 41a.
- the safety device 12 comprises a single central plate 19a and two side plates 19b, which are welded to the central plate 19a via side welds 41b .
- a central weld 41 joins the single central plate 19a to the connecting plate 46 secured to the insulating mass of the first space 21.
- Each side plate 19b is made up of two elementary plates 19' connected to each other by a plate upper 19”.
- the upper plate 19” is connected to each of the elementary plates 19’ via upper welds referenced 41’.
- one of the elementary plates 19' is fixed to the upper plate 19” via an upper weld 41' and to the central plate 19a via a side weld 41b.
- the four elementary plates 19' extend in the same first plane, while the two upper plates 19” extend in the same third plane, this first plane and this third plane being parallel but distinct in a state before rupture of the safety device 12.
- the first plane is thus interposed between this third plane and the second plane in which the single central plate 19a extends.
- One of the elementary plates 19’ includes a side weld 41b which connects one edge of this elementary plate 19’ to the central plate 19a and an opposite edge covered by the upper plate 19”.
- This upper plate 19” includes a first edge and the latter is connected to one face of the elementary plate 19’ by the upper weld 41’.
- Another of the elementary plates 19' comprises a first edge and another edge fixed to the upper plate 19” by an upper weld 41', the latter extending between a second edge of the upper plate 19” and a surface of the plate elementary 19'.
- the single central plate 19a is connected to the connecting plate 46 by a single central weld 41a.
- the safety device 12 comprises the breaking member 44 which here takes the form of one or more lateral welds 41b and/or one or more upper welds 41', whether this is formed between an elementary plate 19' and the central plate 19a or between the upper plate 19” and one and/or the other of the elementary plates 19’ adjacent to the upper plate 19”.
- each assembly constituted by the elementary plates 19' and the upper plate 19” pivots around its side weld 41b, connecting an elementary plate 19' to the central plate 19a under the effect of the pressure differential between the first space 21 and the second space 22, which causes a rupture of this or these lateral welds 41b and/or the upper weld(s) 41'.
- Such pivoting is facilitated by the fact that the central plate 19a is securely attached to the connecting plate 46 by the central weld 41a.
- each side plate 19b is provided with a thinning provided on an upper face 43 of the side plate 19b, the upper face 43 being the face of the side plate 19b which faces the second space 22.
- Such local thinning forms a rupture member 44 which functionally meets the same criterion as the welds mentioned above.
- the thinning takes the form of a groove 42.
- groove 42 constitutes a zone of material fragility which can break during deformation of the side plate 19b just like one of the side welds 41b, as illustrated in the diagram on the right of Figure 13.
- each upper plate 19 is provided with a thinning, for example produced in the form a groove 42 formed on a lower face 47 of the upper plate 19”, the lower face 47 being the face of the upper plate 19” which is opposite the insulating mass.
- thinning constitutes a zone of material fragility which breaks during deformation of the side plate 19b.
- the invention achieves the goal it set for itself, and makes it possible to avoid any blowing of the membrane, that is to say any deformation of the plates which constitute due to a handling error during pressure resistance tests of the insulation spaces of an LNG storage and/or transport tank.
- Variants not described here could be implemented without departing from the context of the invention, since, in accordance with the invention, they comprise a system for storing and/or transporting a gas in the liquid state which comprises at least one tank and at least one safety device intended to protect a sealing membrane of such a tank.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380075931.5A CN120077226A (zh) | 2022-11-07 | 2023-10-20 | 储存和/或运输液态天然气的系统 |
| KR1020257015872A KR20250106277A (ko) | 2022-11-07 | 2023-10-20 | 액체 상태의 천연 가스를 저장 및/또는 운송하는 시스템 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2211578A FR3141747B1 (fr) | 2022-11-07 | 2022-11-07 | Système de stockage et/ou de transport d’un gaz naturel à l’état liquide |
| FRFR2211578 | 2022-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024100337A1 true WO2024100337A1 (fr) | 2024-05-16 |
Family
ID=85018871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2023/051649 Ceased WO2024100337A1 (fr) | 2022-11-07 | 2023-10-20 | Système de stockage et/ou de transport d'un gaz naturel à l'état liquide |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20250106277A (fr) |
| CN (1) | CN120077226A (fr) |
| FR (1) | FR3141747B1 (fr) |
| WO (1) | WO2024100337A1 (fr) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19544593A1 (de) * | 1995-11-30 | 1997-06-05 | Messer Griesheim Gmbh | Vakuumisolierter Kryobehälter |
| FR2996625A1 (fr) * | 2012-10-09 | 2014-04-11 | Gaztransp Et Technigaz | Reservoir etanche et isolant pour contenir un fluide froid sous pression |
| WO2016128696A1 (fr) * | 2015-02-13 | 2016-08-18 | Gaztransport Et Technigaz | Gestion des fluides dans une cuve etanche et thermiquement isolante |
-
2022
- 2022-11-07 FR FR2211578A patent/FR3141747B1/fr active Active
-
2023
- 2023-10-20 KR KR1020257015872A patent/KR20250106277A/ko active Pending
- 2023-10-20 WO PCT/FR2023/051649 patent/WO2024100337A1/fr not_active Ceased
- 2023-10-20 CN CN202380075931.5A patent/CN120077226A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19544593A1 (de) * | 1995-11-30 | 1997-06-05 | Messer Griesheim Gmbh | Vakuumisolierter Kryobehälter |
| FR2996625A1 (fr) * | 2012-10-09 | 2014-04-11 | Gaztransp Et Technigaz | Reservoir etanche et isolant pour contenir un fluide froid sous pression |
| WO2016128696A1 (fr) * | 2015-02-13 | 2016-08-18 | Gaztransport Et Technigaz | Gestion des fluides dans une cuve etanche et thermiquement isolante |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3141747B1 (fr) | 2025-01-17 |
| CN120077226A (zh) | 2025-05-30 |
| KR20250106277A (ko) | 2025-07-09 |
| FR3141747A1 (fr) | 2024-05-10 |
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