WO2012126279A1 - Système de réception et procédé de traitement pour gaz naturel liquéfié - Google Patents

Système de réception et procédé de traitement pour gaz naturel liquéfié Download PDF

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Publication number
WO2012126279A1
WO2012126279A1 PCT/CN2012/000351 CN2012000351W WO2012126279A1 WO 2012126279 A1 WO2012126279 A1 WO 2012126279A1 CN 2012000351 W CN2012000351 W CN 2012000351W WO 2012126279 A1 WO2012126279 A1 WO 2012126279A1
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WO
WIPO (PCT)
Prior art keywords
lng
cng
container
storage system
regasification
Prior art date
Application number
PCT/CN2012/000351
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English (en)
Chinese (zh)
Inventor
吴树凯
Original Assignee
益资海洋工程技术(北京)有限公司
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Publication of WO2012126279A1 publication Critical patent/WO2012126279A1/fr

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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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/036—Very high pressure, i.e. above 80 bars
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/05—Regasification
    • 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
    • F17C2265/06—Fluid distribution
    • 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
    • F17C2265/06—Fluid distribution
    • F17C2265/068—Distribution pipeline networks
    • 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
    • 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
    • F17C2270/011—Barges
    • F17C2270/0113—Barges floating
    • 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
    • F17C2270/0134—Applications for fluid transport or storage placed above the ground
    • F17C2270/0136—Terminals
    • 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
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • F17C2270/0171—Trucks

Definitions

  • the present invention relates to a liquefied natural gas (LNG) storage and transportation technology, and more particularly, to a liquefied natural gas receiving system and a processing method.
  • LNG liquefied natural gas
  • the use of natural gas outside of the gas source is usually carried out in three ways.
  • the first is to send natural gas from the gas source to the user using the natural gas pipeline.
  • the second is to liquefy natural gas in the gas source to form liquefied natural gas (LNG), which is transported by water or land to the place of use, and then re-gasified to the user after use.
  • LNG liquefied natural gas
  • the third is to compress natural gas to form compressed natural gas (CNG) by water or land to the user.
  • the main function of the common LNG receiving terminal is to store and re-gasify, and the liquefied weather of the ship is unloaded to the receiving terminal for storage, and then re-gasified and sent to the local pipe network, and sent to the user through the pipe network; or Directly sent to large gas users such as power plants, smelters, etc.
  • the receiving terminal has a single function, a single user, and a small user coverage, which cannot meet the various needs of people for using natural gas. As the types and forms of natural gas users increase, functional requirements for LNG, CNG transport, and loading of LNG fuel ships are proposed for LNG receiving terminals.
  • the liquefied natural gas will generate flash vapor due to the introduction of heat and physical displacement.
  • the flash vapor is in a low temperature state, and the amount of flash gas per day is usually 0.1%-0.3%. Over time, flash vapors continue to increase in the tank, affecting safety and requiring treatment.
  • the common treatment method is: A part of the flash steam is returned to the LNG cabin during unloading to balance the pressure inside the gun, part of which is recondensed and returned to the LNG storage tank, and then the excess is burned or Discharge into the air, not only waste but also disadvantageous Environmental protection. Summary of the invention
  • the present invention proposes a receiving system for liquefied natural gas and a processing method thereof.
  • a liquefied natural gas receiving system comprising: an LNG carrier, an LNG carrier dock, an LNG unloading system, an LNG transmission system, an LNG storage system, a LNG regasification system, a flash steam treatment system , LNG transport systems (including maritime transport and / or on-road transport; bulk transport and / or container transport), CNG transport system (including water and / or onshore container transport), LNG fuel ship loading system.
  • LNG transport systems including maritime transport and / or on-road transport; bulk transport and / or container transport
  • CNG transport system including water and / or onshore container transport
  • LNG fuel ship loading system comprising: an LNG carrier, an LNG carrier dock, an LNG unloading system, an LNG transmission system, an LNG storage system, a LNG regasification system, a flash steam treatment system , LNG transport systems (including maritime transport and / or on-road transport; bulk transport and / or container transport), CNG transport system (including water and / or onshore container transport), LNG fuel ship loading system.
  • the LNG carrier transports LNG between the receiving system and the LNG source; the LNG carrier dock has pipes for unloading LNG from the LNG carrier through the LNG unloading system; the LNG unloading system is used to Low-temperature pipelines and LNG transmission systems on terminal offshore facilities, unloading LNG from transport vessels to LNG storage systems; LNG storage systems, LNG transport from storage systems through LNG transport systems to regasification systems, or to LNG bulk transporters Ships and LNG container transfer vessels are transported by sea, or to LNG carriers for land transport; LNG regasification systems, LNG gasification of natural gas for external transport; LNG transport systems, arranged for LNG storage systems and LNG receiving terminal seas Between the facilities, and between the regasification system and the LNG storage system, the liquefied gas or regasified gas is transferred therebetween.
  • a liquefied natural gas receiving processing method including: Step 1), an LNG carrier is docked at an LNG carrier dock, and an LNG unloading system is used to unload LNG from an LNG carrier, and the LNG is unloaded.
  • the system is used to unload LNG from the transport vessel to the LNG storage system via a cryogenic pipeline and LNG transmission system located at the terminal offshore facility; Step 2), LNG is transferred from the LNG storage system through the LNG transmission system to the regasification system , or LNG dare to load the transfer system, or LNG container transfer system; Step 3), LNG regasification system will gasify the natural gas outside; Step 4), LNG storage system LNG loading system will load LNG into LNG transportation
  • the LNG container transfer ship accepts the LNG container transported by the LNG loading system
  • the LNG bulk transfer ship accepts the bulk LNG transported by the LNG loading system
  • the LNG ground transport unit transports the bulk or container-type LNG on land.
  • a method of treating flash vapor generated during a liquefied natural gas unloading storage process comprising: returning to a flash vapor generated during discharge or storage of LNG, a portion of which is returned to the discharge
  • the LNG ship grabs the balance to grab the internal pressure, and the other part heats or pressurizes the flash steam.
  • the heated natural gas is sent directly to the natural gas pipeline network or boosted and transported as CNG.
  • the system of the present invention is applicable to LNG receiving terminals in coastal areas, along rivers and the like.
  • 51% of natural gas consumption by 2020 will come from LNG imports. Therefore, the large-scale introduction of LNG clean energy is an inevitable trend, and the construction of LNG receiving terminals in coastal areas will enter a new stage of development.
  • the hub terminal based on this patent will certainly exert its good economic and social benefits in the construction of China's LNG hub terminal.
  • Fig. 1 shows a schematic structural view of a liquefied natural gas receiving system according to the present invention. detailed description
  • the present invention provides a multifunctional liquefied natural gas receiving system that increases the transport function of LNG, the service function of CNG, and the delivery of CNG on the basis of receiving terminal storage and regasification functions.
  • the transport function of LNG can be either water transport or land transport.
  • LNG water transport can be transported in bulk or in container;
  • LNG ground transport is transported in the form of containers.
  • the delivery of CNG can be either water or land.
  • CNG's water and land transportation are shipped in the form of containers.
  • the multifunctional LNG receiving system of the present application includes: an LNG carrier, an LNG carrier dock, an LNG unloading system, an LNG storage system, an LNG regasification system, an LNG transmission system, and onshore facilities, and further Including LNG bulk transfer ship, shipping LNG planting system, LNG bulk terminal, LNG container transfer ship, LNG container terminal, shipping CNG loading system, CNG container transfer ship, CNG container transfer terminal, LNG ground transportation system and installation, CNG ground transportation Systems and devices.
  • LNG can be transported on the one hand (ie, bulk transport and container transport), while CNG (container transport) can be transported on the other hand.
  • LNG and CNG can be transported by water or by land.
  • CNG can be derived from regasified natural gas and, on the other hand, from treated flash gas (BOG).
  • an LNG carrier refers to a carrier vessel carrying LNG between the receiving system and the LNG source, typically docked at a dock that is part of the terminal offshore facility.
  • the LNG carrier docks at the terminal and is part of the terminal offshore facility for the docking of the transport vessel and has piping for unloading LNG through the LNG unloading system.
  • the LNG unloading system for unloading LNG.
  • the LNG unloading system is attached to the docking terminal of the terminal offshore facility.
  • the LNG is unloaded from the transport vessel to the LNG via the cryogenic pipeline and LNG transmission system located at the terminal offshore facility. On the storage system.
  • LNG storage system LNG is transferred from the LNG storage system through the LNG transmission system to the regasification system.
  • the storage system and the regasification system can be separate or integrated.
  • the LNG storage system is similar to the regasification system and can be machined and then transported to the site for installation, and can be transported away as needed.
  • LNG storage units can be constructed and installed onshore or as part of a marine LNG receiving terminal offshore facility.
  • LNG generates flash vapor (BOG) due to heat transfer and physical displacement.
  • the flash vapor is at a low temperature, and the amount of flash gas generated is usually 0.1%-0.3%. Over time, flash vapors continue to increase in the tank and need to be disposed of.
  • the generated BOG portion is returned to the cabin of the LNG carrier to balance the pressure in the cabin, and the other portion is output to the BOG heating and pressurizing device through the pipeline in the LNG storage system.
  • the LNG regasification system in the form of a single tank or the like, may be self-propelled or non-self-propelled, or located on land.
  • the regasification system has relatively fixed performance during production and operation, and the relatively fixed implementation forms mainly include pile-leg support type, pressure-carrying semi-submersible and enclosure positioning type.
  • the LNG transmission system is disposed between the LNG storage system and the LNG receiving terminal offshore facility, and between the regasification system and the LNG storage system for conveying the liquefied gas or the regasified gas therebetween.
  • Onshore facilities are systems and facilities used to support LNG receiving, regasification, and natural gas outflows or to shore waters.
  • the BOG heating and pressing device is located between the LNG storage system and the CNG container loading platform, and heats the BOG output from the LNG storage system to raise it to a normal temperature state, or between -15 degrees Celsius and normal temperature, and to increase the container.
  • the amount of planted, the BOG is pressurized, and the pressurization is treated as needed, and it is possible to increase the pressure by several hundred times to reduce the volume.
  • the CNG container loading platform which can be a water platform or an on-road terminal, is used to carry out the consolidation of compressed natural gas for shipment.
  • Shipping CNG planting system located between CNG container loading platform and CNG container transfer vessel, for CNG The CNG container on the container loading platform is added to the CNG container transfer vessel.
  • CNG container transfer vessel for transporting CNG containers through waterways.
  • a part of the LNG output after the LNG regasification system is also pressurized and output to the CNG container loading platform for transmission by CNG.
  • the other part is exported to the user directly in the form of gasified natural gas.
  • the LNG storage system acts as a medium transfer platform, which allows LNGs transported by large giant ships to be directly transported at the terminal to reduce the pressure on the LNG to accept the terminal storage system, thus saving space and improving efficiency.
  • the output of the LNG storage system is output to three locations at the lower end, first, to the LNG bulk terminal; the second is transmitted to the LNG container terminal; and third, directly to the LNG fuel ship, which uses LNG as the direct fuel. Power running.
  • the LNG bulk terminal is used to distribute the LNG transported by the LNG storage system to a small hull.
  • LNG container terminal used for containerized processing of LNG transported by LNG storage system, facilitating long-distance and centralized transportation.
  • LNG container transfer vessel for receiving LNG containers transported by the LNG loading system.
  • LNG bulk transfer vessel for receiving bulk LNG from shipping LNG loading systems.
  • the regasification system and the LNG storage system can be located at sea or on land, and can be integrated or separated. When located on land, it can be directly a system. When located at sea, a corresponding platform should be established, that is, on the regasification platform.
  • a regasification system is arranged, an LNG storage system is arranged on the LNG storage platform, and a platform lifting system is arranged in the regasification platform and/or the LNG storage platform.
  • the Regasification System includes a gasifier and its subsidiary structure, and is disposed on a Regasification Vessel for regasifying LNG and outputting the gasified natural gas.
  • the Platform Lifting System is used to change the vertical position of the regasification platform/or LNG storage platform relative to the bottom or surface of the water.
  • the platform lifting adjustment system includes but is not limited to: (1) In order to adjust the leg support type of the regasification platform/LNG storage platform relative to the vertical position of the bottom or leg, including hydraulic jacking, gear climbing, pulley pulling Stretching or a combination of these; (2) prefabricated offshore infrastructure (with or without lifting), Support the regasification platform/LNG storage platform by adjusting the facility, and/or adjusting the draught or lifting and regasification platform/LNG storage system through the ballast water system (including direct constant weight); (3) Through the enclosure structure (including dry dock or similar facilities) to maintain relative static position in the vertical position of the gasification platform 2.
  • the regasification platform has relatively fixed performance during production and operation, and the relatively fixed implementation forms mainly include pile leg support type, ballast semi-submersible type, and enclosure positioning type.
  • this fixing method can also be applied to the LNG storage platform. That is, when the regasification platform and the LNG storage platform are integrated, the receiving platform as an integral thereof can have both fixability and mobility.
  • the pile legs are lifted by the lifting device installed on the hull platform, and the entire platform floats on the water surface.
  • the pile legs are supported by the lifting device mounted on the hull platform, and the platform is lifted off the water surface, and is not affected by the water level change.
  • the lifting device can be lifted off the surface by hydraulic lifting, gear climbing or pulley rope stretching.
  • a fixed abutment, pile or lifting device is built on the bottom of the water.
  • the lifting device is raised to secure the regasification platform to the underwater abutment, fixed pile or lifting device.
  • a closable enclosure structure is constructed on the water surface, and the regasification device platform is driven into the enclosure structure to extract some or all of the water in the enclosure.
  • the regasification unit platform is fixed.
  • the enclosure includes a retaining base, fixed side walls in three directions, and side walls with a door in one direction.
  • the regasification platform is movable, and when the regasification platform is not fixed, the regasification platform can be adjusted into a floating body to move from the ground to the ground. For example, the regasification platform can be built again, and the water can be transported to the B. When the peak is needed, the regasification platform can be towed to other places for peak shaving; when it is overhauled, it can be repaired. The platform is towed to the dock for maintenance, and another platform is replaced by the original platform. What is more worth mentioning is that the mobile regasification platform maintains a static position relative to the ground without the use of single-point mooring and anchor mooring. It can be processed and built elsewhere, shipped to the site for installation, and remains stationary during production operations.
  • the LNG storage platform is also mobile; further, when the regasification platform and the LNG storage platform are integrated, the integrated receiving platform as an integral thereof can have the above specific features.
  • the regasification platform and the LNG storage platform can be combined.
  • the regasification unit and the LNG storage unit can be installed on different hull platforms or on the same platform to form an integrated receiving platform.
  • Multiple regasification platforms and LNG storage platforms can be configured depending on the amount of gas used in the terminal.
  • the distance between the two can be adjusted to improve the fire safety performance. Also, when the two are integrated, the distance between the two should be noted. Guaranteed safety.
  • the regasification platform can be adjusted in the vertical direction.
  • the lifting function can be achieved by designing a lifting device on the regasification platform, or a offshore installation, or a combination of the two.
  • the former is kept flat by upgrading the regasification platform
  • the station is stationary, while the latter is fixed at the offshore facility by lowering the position of the platform.
  • the horizontal and vertical positions of the regasification platform are typically stationary relative to the ground, but in practice it can be adjusted to specific needs.
  • a method of treating flash vapor produced by liquefied natural gas during unloading and storage is illustrated.
  • the flash vapor at a low temperature is generated due to the introduction of heat and physical displacement, and the amount of flash gas per day is usually 0.1%-0.3%.
  • the common treatment method is: A part of the flash steam is returned to the LNG cabin during unloading to balance the pressure in the tank, and part of it is condensed and returned to the LNG tank, and then the excess is burned or Discharge into the air.
  • the flash vapor returned to the LNG storage tank after condensation is not condensed and sent back to the storage tank, but is heated by the flash steam. Specifically, it is heated to a normal temperature by a heating device. In addition, according to transportation requirements, based on the inverse ratio of pressure and transport capacity, it is pressurized to increase transport capacity.
  • the heated natural gas is sent directly to the natural gas pipeline network or boosted and then transferred out as CNG. This treatment simplifies the processing of flash steam and reduces the processing cost; and the equipment that is recondensed by flash vapor is a low temperature equipment, the heating equipment of flash steam is a normal temperature equipment, and the low temperature equipment is much more expensive than the normal temperature equipment, thereby reducing the equipment cost. .
  • the terminal system of the present invention has the function of providing external gas transmission, and also has the function of providing the transit function of the liquefied natural gas and the service function of providing the compressed natural gas, so that the range of users covered by the terminal will be greatly improved, and the service form of the terminal is also improved. With diversity.

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

Abstract

L'invention porte sur un système de réception pour gaz naturel liquéfié (LNG) qui comprend : un méthanier qui transporte le LNG en va-et-vient entre le système de réception et une source de LNG; un quai d'ancrage de méthanier, équipé d'une canalisation utilisée pour décharger le LNG du méthanier au moyen d'un système de déchargement de LNG; le système de déchargement de LNG, utilisé pour décharger le LNG du méthanier vers le système de stockage de LNG, par une canalisation à basse température agencée sur un terminal maritime, et un système de transfert de LNG; le système de stockage de LNG, le LNG étant transféré par un système de transfert du système de stockage de LNG à un système de regazéification, un système de transbordement de vrac de LNG et un système de transbordement de citernes de LNG; le système de regazéification de LNG destiné à produire le gaz naturel gazéifié; le système de transfert de LNG, agencé entre le système de stockage de LNG et le terminal maritime de réception de LNG, ainsi qu'entre le système de regazéification et le système de stockage de LNG et utilisé pour transférer le gaz liquéfié ou le gaz regazéifié entre les deux systèmes.
PCT/CN2012/000351 2011-03-21 2012-03-21 Système de réception et procédé de traitement pour gaz naturel liquéfié WO2012126279A1 (fr)

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CN102654239B (zh) * 2012-05-22 2014-07-30 中国海洋石油总公司 液化天然气接收终端的气化系统
CN107228275A (zh) * 2017-05-26 2017-10-03 惠生（南通）重工有限公司 一种可灵活组合且无人值守的浮式lng储存系统
CN109140225A (zh) * 2018-09-05 2019-01-04 中国海洋石油集团有限公司 一种lng分拨中心
CN109139114A (zh) * 2018-09-25 2019-01-04 广州码云互联网科技有限公司 高压地下储气井下沉上冒监控装置
CN109595459A (zh) * 2019-01-21 2019-04-09 周林江 一种液化天然气卸载系统及方法
CN111591396B (zh) * 2019-06-25 2021-07-20 南京蒽天捷能源科技有限公司 可移动串联式浮动液货过驳海工平台及过驳方法
WO2021086546A1 (fr) * 2019-10-30 2021-05-06 Exxonmobil Upstream Research Company Procédé d'alimentation en gnl à partir d'un concentrateur d'alimentation à l'aide d'un transporteur de gnl à double usage et d'un stockage de plus petit volume au niveau d'un terminal de réception
CN116045211B (zh) * 2023-01-03 2023-09-19 中交第四航务工程勘察设计院有限公司 远距离大型lng装船装置及其装船方法

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