WO2012065366A1

WO2012065366A1 - Liquefied natural gas storage and transportation system, lng receiving platform thereof

Info

Publication number: WO2012065366A1
Application number: PCT/CN2011/001916
Authority: WO
Inventors: 吴树凯
Original assignee: 益资海洋工程技术(北京)有限公司
Priority date: 2010-11-19
Filing date: 2011-11-16
Publication date: 2012-05-24
Also published as: CN102050208A; CN102050208B

Abstract

Disclosed in the present invention is a liquefied natural gas storage and transportation system, which comprises a liquefied natural gas (LNG) receiving platform. The platform comprises a re-gasification platform and a LNG storage platform, which are separated from each other or combined into integration. The re-gasification platform is provided with a re-gasification system. The LNG storage system is arranged on the LNG storage platform. A platform lifting system is arranged in the re-gasification platform and/or the LNG storage platform. The liquefied natural gas receiving platform is a float and can be movable. The re-gasification platform and the LNG storage platform are fixed in the water during the LNG transportation system coupling the LNG carrier. The storage and transportation system has better stationary effect when operating and producing, better mobility when installing, peak regulating and maintaining, and better composing ability according water domain condition or operation production requirement.

Description

-Liquid liquefied natural gas storage and transportation system and floating receiving platform thereof

[0001] The present invention relates to a liquefied natural gas (LNG) storage and transportation technology, and more particularly, to a liquefied natural gas storage and transportation system and a floating receiving platform therefor. Background technique

[0002] Long-distance transport of sulphur, especially through waterways, first of all, to convert natural gas into liquefied natural gas (LNG) in a liquefied gas source or liquefaction plant, and then through an LNG carrier (LiS'GC) ) Transport it to a transit hub terminal or LNG receiving terminal. After the LXG of the receiving terminal is regasified, it is delivered to the end user. Usually, the 1AG receiving terminal is located on the land or on the water. The land is called the same terminal, and the water is called the floating terminal.

10003] For fixed terminals on land, usually LX (the transport ship is docked at the dockside, connected to the receiving terminal, LN (; unloaded to the LXG storage device through the unloading system, :|ΐ delivers the LNG through the transmission system ; Ρί gasification unit, after gasification, send natural gas to users

[0004] There are two main types of floating receiving terminals, one is a hull platform (FSRU) with storage and regasification functions, and the other is a vessel with transportation, storage, and regasification functions ( SRV). Both floating LNG receiving terminals integrate storage and regasification functions on one boat. Both receiving terminals are floating bodies, which may cause LNG unloading difficulties and LN due to wind and wave movements; (transportation vessels are difficult to berth. When LN carriers are berthed by FSl3⁄4 or SRV, they are all floating, compared to LNG transportation. It is more difficult for the ship to berth the fixed dock, which puts higher requirements on the environmental conditions of the LNG transport ship berthing.

[0005] The commonly used floating LNG receiving terminals are positioned in a single point mooring and anchor chain mooring. The single-point moored hull platform rotates around a single-point mooring tower in areas with poor wind and wave conditions, occupying a large area of water. The chain-type moored hull platform is difficult to locate in the shallow-water raft system. The anchor chain is covered with a large water surface, which is not conducive to the navigation of the passing ships, especially the rivers and lakes that are not suitable for the busy channel.

[0006] Another LXG receiving terminal is fixedly built on the seabed, called the 3⁄4 seated offshore LN receiving terminal (CBS), which can avoid the berthing caused by single-point or anchor chain mooring. Unloading difficult problems, but the water depth, the seabed geological conditions put forward a more ambiguous, and can not move to π it, the construction and maintenance costs are relatively 髙_n

[0007] As cities continue to use natural gas, it is necessary to place LNG receiving terminals at the estuaries of shallow seas, rivers, lakes or rivers near the city. Compared with open seas, these waters have better wind and wave conditions, but the water quality is poor, the tides are large, the water area is small, the water depth is shallow, the hull size is limited, the channel transportation is busy, and the fire safety requirements are high. Receiving platform is difficult to meet the above requirements - the content of the invention

In order to avoid various defects of the above LNG storage and transportation system and the LG receiving terminal, the present invention proposes a liquefied natural gas storage and transportation system and a floating receiving platform thereof.

10009] 一个 One side of the invention, 捣 for one! ..NG storage system, including NG receiving platform, l «transport system, unloading system, terminal offshore facility and L G transport vessel, said receiving platform is floating and movable, said

1

Confirmation The LNG receiving platform comprises an integrated or distributed regasification platform and an LG storage platform, on which the regasification system is arranged, the LNG storage platform is arranged with an LXG storage system, a regasification platform and I A platform lifting system is arranged in the LXG storage platform.

[0010] According to another aspect of the present invention, there is provided a floating LN (receiving platform, the LNG receiving platform is movable, the LNG receiving platform comprising an integrated or separate regasification platform and an LNG storage platform A regasification system is arranged on the regasification platform, and a storage system is arranged on the LNG storage platform, and a platform lifting system is arranged in the regasification platform and the I or LNG storage platform.

[001 1] The storage and transportation system of the present invention is fixed in operation and production, has mobility during installation, peak shaving, maintenance, etc., and is combinable in combination with water conditions. The \ storage and transportation system and the floating receiving platform of the present invention are suitable for the waters near the estuaries of shallow seas, rivers, lakes or rivers near the city. DRAWINGS

[0012] FIG. 1 shows a schematic diagram of the LXG storage and transportation system of the present invention;

[0013] FIG. 2 is a schematic diagram of a leg-supporting self-elevating regasification platform;

[0014] FIG. 3 is a schematic view of a ballasted semi-submersible regasification platform;

[0015] FIG. 4 is a schematic view of a squatting type re-gasification platform. detailed description

[0016] A liquefied natural gas storage and transportation system and a floating receiving platform provided by the wood invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

1 shows an LNG floating storage and transportation system in accordance with one embodiment of the present invention. Including LXG floating storage and transportation system including LNG receiving platform, L G transmission system, unloading system, offshore facilities of LNG receiving platform, 1, NG unloading system, L G transport ship and onshore facilities. The storage and transportation system also includes the necessary onshore S. The LNG receiving platform includes an integrated or separate regasification platform and an LNG storage platform, and the re-gasification platform has a regasification system on the arm, the LNG storage system is arranged on the LG storage platform, and the platform lifting system is arranged in the regasification system. Platform and or LNG storage platform.

[0018] The following steps - step reference! To describe in detail the structure and function of the transmission system, wherein the Regasii system includes a gasifier and a : genus structure, which is arranged on the regasification platform.

On 2 (Regasi ficat ion Vessel), it is used to regasify LNG and output the gasified natural gas.

[0019] The regasification platform 2 (lieg _aS i ficat io _n Vessel) is a hull platform with a thousand-loaded regasification system 1 having a single tank or: a similar form, which may be S-voyage or non-nautical.

10020] Platform Lifting System: 3 (VEAS) ffl In order to change the vertical position of the regasification platform 2 and/or the LNG storage platform 5 with respect to the bottom or the water surface, the platform lifting adjustment system includes not limited to: (1) In order to adjust the air The support of the platform 2/LNG storage platform 5 with respect to the bottom of the water or the vertical position of the pile leg, including hydraulic jacking, gear climbing, pulley stretching or combination of these; (2) prefabricated sea Infrastructure (can be lifted or not: Π·降), adjusted by the facility, and/or through the ballast water system (including direct constant weight) to adjust the draught or lift and regasification platform 2/1 3⁄4 storage 3⁄4 system, Supporting the re-gasification platform 2/LNG storage platform; (3) maintaining the relative staticness of the gasification platform 2 in the vertical position by the II block structure (including the thousand docks or similar facilities), which is described in detail below with reference to FIG.

[0021] The LNG transfer system 4 (LiNG Transfer System) is disposed between the LNG storage platform and the LNG receiving terminal offshore facility 6, and between the regasification platform 2 and the weir, the storage platform 5, and uses ten to transport the liquefied gas therebetween. Or regasification gas

[0022] The LNG storage platform 5 (LNG Storage Vessel) is used to carry the LKG storage system, and the LNG is transferred from the LNG storage platform to the regasification platform 2 through the LNG transmission system for regasification. In the receiving platform, the storage platform and the regasification platform may be separate or integrated. The LNG storage platform is similar to the regasification platform and can be moved and machined to the site for installation, and can be transported away as needed. The L\G storage unit can be built and installed onshore or as part of a marine LNG receiving terminal offshore facility, but this is not considered an LNG storage platform.

[0023] Terminal Marine Facility (General Terminal Facility) generally refers to fixed structures and facilities.

Γ· Provides a water raft interface that supports pipelines, LNG unloading systems, LNG transmission systems, and docks for LNG carriers.

[0024] The LNG unloading system 7 (LXG Un I odi system) is used to unload the LNG, and the LNG unloading system is attached to the terminal offshore facility 6 through the cryogenic pipeline and the LNG transmission system 4 installed at the terminal offshore facility 6 , LKG from the transport ship

8 is unloaded onto the LXG storage platform 5.

[0025] The LNG carrier (Shutt le Li\'G Carrier) refers to a transport vessel carrying LNG between the receiving terminal and the L O source, and is typically parked on a dock that is part of the terminal offshore facility 6.

[0026] Onshore Facility refers to systems and facilities used to support ^Lf G reception, regasification, and natural gas outflow onshore or into nearshore water.

[00273 The regasification platform has relatively fixed performance during production and operation. The relatively fixed implementation forms mainly include pile-supported, ballasted semi-submersible and enclosure-oriented. Similarly, this fixed method can also be applied to LNG storage platforms. That is, when the regasification platform and the storage platform are integrated, the receiving platform as the body can have the same qualitative and mobility.

[0028] ffl 2 shows the self-lifting fixed regasification platform of the pile leg support. In the left part of the figure, the regasification platform is in a floating state, and the pile leg is lifted by a lifting device installed on the hull platform. The entire platform floats on the water. In the right part of the figure, the regasification platform in a fixed support state is shown. The lifting device installed on the hull platform supports the pile legs to support the bottom of the water, and lifts the platform off the water surface without being affected by the water level change. . The lifting device can lift the platform out of the water surface by means of liquid lift, gear climbing or pulley rope stretching.

[0029] showing a ballasted semi-submersible fixed regasification platform, constructing a fixed raft base, pile or lifting device on the bottom of the water. After the regasification device platform is adjusted to a designated position on the water, The ballast lifts its sinking or lifting device 3⁄4 to fix the regasification platform to the underwater abutment, the peripheral set or the lifting device h. The left part of the figure shows the re-gasification platform in a floating state, on which no ballast has been added, and the gasification platform floats on the water and fails to be fixed in contact with the drawing base. The right part of the figure shows the re-gasification platform in a fixed support state. The ballast is loaded on the gasification platform, so that the gasification platform sinks, or the underwater device is raised, so that the bottom of the platform is fixed on the base. .

[0030] FIG. 4 shows a re-gasification stage with a cofferdam sinking type, a closable enclosure structure is constructed on the water, and the regasification device platform is driven into the shackle structure, and the enclosure is The water is pumped out part or all to fix the W gasification unit platform. The enclosure includes a fence ffi seat, fixed side walls in three directions, and side walls with gates in one direction. The left side of the figure shows the floating gasification platform. At this time, the gasification platform enters the surrounding area, and the water in the ffl a has not yet been pumped. The right side of 1 shows the re-gasification platform with the same supporting state. At this time, the re-gasification table is lowered to the surrounding base by the water in the surrounding area.

[0031] The regasification flat has mobility, and when the regasification platform is not fixed, the regasification platform can be adjusted into a floating body, moving from the flat ground to the ground. For example, the regasification platform can be built again. When the water is transported to the B, the peaking can be adjusted. The regasification platform can be towed to other places for peak shaving; when it is overhauled, the platform can be repaired. Dragged to the dock Repair, replace another platform to work on the original platform. What is more worth mentioning is that the movable regasification platform maintains a static .ih 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 kept stationary during production operations. Similarly, the LNG storage platform is also mobile: further, the regasification platform and the LNG storage platform are integrated, and the receiving platform as the body thereof can have the above specific features.

[0032] The regasification platform and the LNG storage platform may be arranged in combination, and the regasification device and the LNG storage device may be distributed on different hull platforms or may be placed on the same platform to form an integrated receiving platform. Multiple regasification platforms and storage platforms can be configured depending on the amount of gas used in the terminal. When the regasification unit and the LNG storage unit are installed on different hull platforms, the distance between the two can be adjusted to improve the safety performance of the fire, and when the two are integrated, the Oi needs to pay attention to the two. The distance to ensure safety.

[0033] Further, referring to FIGS. 2-4, specifically, the gasification platform 2 can be adjusted in the forward direction. The lifting function can be realized by setting a lifting device on the gas re-gasification platform, or a marine facility, or a combination of the former two. The former maintains the rest of the platform by lifting the regasification platform, while the latter is fixed to the offshore installation M by lowering the position of the platform. Once positioned, the horizontal and vertical positions of the regasification platform are usually stationary at the same time relative to the ground, but in practice it can be adjusted to suit specific needs.

[0034] The regasification system 1 can be selectively and LN (the storage system is placed on the same platform. For example, a regasification platform or an LNG storage platform. However, they are usually placed on a platform to strengthen Mobility and flexibility of operation. For re-gasification stations that have the capacity to store enough LG, the separate LG storage unit 5 is unnecessary, and the separate LNG storage platform 5 can have its own The vertical lifting system is similar (but not necessarily the same) to the regasification platform lifting system.

[0035] The regasification platform 2 and the LNG storage platform may each have onboard power and other necessary facility systems. Therefore, each platform can be designed to introduce power or other facility systems from shore to reduce weight and draught to enhance mobility. Both the regasification platform 2 and the LXG storage platform can be made into a shallow draught platform to facilitate near-shore installation, reducing project cost and operating wood.

[0036] The subgasification platform 2 adopts an immersion combustion type gasifier and an air vaporizer suitable for rivers, nearshore areas and other shallow water areas, so as to avoid the higher demands of the gasifier on the sea water quality S. . The regasification platforms 2 and I; the storage platform 5 can be used alone or in combination with ten peaks, used as satellite receiving terminals or as a supplement and extension for large receiving terminals.

[0037] By the storage and transportation system and the regasification platform of the present invention, the regasification system and the L.NG storage system are respectively installed on different hull platforms, thereby reducing the hull size and making the LNG receiving terminal cloth flexible and convenient. Sailing; reduce the total weight of the hull, and facilitate the use of the legs and legs. Compared with single-point mooring and shackle chain mooring, it occupies a small water area and is easy to navigate. Because of the removability of the re-gasification unit or LNG storage T-stage, it can be manufactured off-site and easy to install. : When he wants to re-gasification platform or LNG storage platform for peak shaving, he can adjust the peak of the terminal where he needs to adjust the peak. Due to the integrity of transportation, the debugging workload can be minimized, and even Free commissioning 丄 NG transmission is reliable, the production operation 吋 gasification platform and iM storage platform can be relatively fixed. The LNG transmission pipe is uploaded from the m transport ship to the LNG storage platform through the dock bank of the ii, in the LNG storage platform. Through the bank to the re-gasification station of Luding, all the transmission pipelines can be used with rigid concrete pipelines, which is highly reliable. Due to the fixing of the hull platform, it is convenient for the hull platform II; the connection between the 筲' road and the external gas pipeline is beneficial to the work of the regasification system, ftl. NGC berthing dock, contrast point mooring and anchor chain Mooring, dip - LNGC berthing and LNG unloading. The hull platform can be raised, separated from the water, and protected from the tides, especially the legs supported from the I-lift platform. [ορ3δ] After the rock should be explained, the above M is only used to describe the technical solution of the present invention and not to limit the technical method. The present invention can be applied to the modification, change, and li of the application. And the embodiments, and: II. All such modifications, variations, applications, and embodiments are considered to be within the scope of the present invention.

Claims

1. An LNG storage and transportation system, including: LNG recovery platform, LNG transmission system, terminal offshore facilities and LNG transport ship, characterized by:

The receiving platform is floating and movable, and can be fixed during production and operation; the LNG receiving platform includes a gasification platform and an LNG storage platform, and the regasification platform and LNG storage platform can be separated or combined into Integrated, the regasification platform and the LNG storage platform are fixed on the water when connected to the LNG carrier through the LNG transmission system, a regasification system is arranged on the regasification platform, and a regasification system is arranged on the LNG storage platform. There is an LXG storage system, and a platform lifting system is arranged in the regasification platform and I or LNG storage platform.

2. The system of claim 1, wherein the L'G receiving platform lowers the legs on the LNG receiving platform to the bottom of the water through the platform lifting system to store the regasification platform and/or the LNG in the LNG receiving platform. The first platform is raised to leave the water; the LNG receiving platform lifts the legs on the LG receiving platform away from the water bottom through the platform lifting system, and lowers the regasification platform and/or the LNG storage platform in the I.-NG receiving platform. Float on the water.

3. The system of claim 2, wherein the platform lifting system adopts hydraulic jacking, gear climbing or pulley rope stretching to lift the regasification platform and/or the LNG storage platform.

4. The system of claim 1, wherein the LG receiving platform carries a regasification platform and/or an LNG storage platform, or a liftable underwater facility, and the regasification platform is placed underwater. platforms, fixed piles or underwater facilities, unloading ballast or lowering underwater facilities to float the regasification platform and/or L_\G storage platform.

5. The system of claim), wherein the IΛ(1 receiving platform is arranged in a sealable enclosure structure, the water in the enclosure is extracted, and the regasification platform and/or the LNG storage platform are fixed on the enclosure On the base, float the regasification platform and/or 1M storage platform by adding water to the enclosure.

6. The system of claim 1, wherein the distance between the regasification platform and the LNG storage platform is adjustable to improve safety performance》

7. The system of claim 1, wherein the LN transfer system is arranged between the LNG storage platform and the terminal sea: T: facility and between the regasification platform and the LNG storage platform for transferring liquefaction therebetween. Gas or regasified gas, the transmission pipeline is ffl rigid pipeline.

8. The system of claim 1, wherein the terminal offshore facility provides pipelines, supports an LNG offloading system, and docks LNG carriers.

9. The system of claim 1, wherein the LM; unloading system is attached to the terminal offshore facility h, and will be unloaded from the transport ship through a cryogenic pipeline located on the terminal offshore facility and transmitted to the LN(i) transmission system LXG storage flat

Z -,

1. The system of claim 1, wherein the regasification platform and the LXG storage platform have on-board power facilities of each β, which can be introduced from 1 to 2, and can be designed as a platform with a very shallow draft.

11. A kind of float! K (; receiving platform, characterized in that the LNG receiving platform is floating and movable, the L receiving platform includes a Ran gasification platform and a liffi storage platform, the regasification platform and the LNG storage platform can Split or combined into one, the regasification platform and the LN storage platform are fixed on the water when connected to the LN transport ship through the L!\ transmission system, and a regasification platform is arranged The L(i storage platform is equipped with LN(; storage system, regasification platform and/or LNG storage platform is equipped with a platform lifting system.

12. The platform of claim 11, wherein the receiving platform lowers and supports the legs on the receiving platform at the bottom of the water through a platform lifting system, and lifts the W gasification platform and/or the LNG storage platform in the LNG receiving platform out of the water. Water; the LNG receiving platform lifts the legs on the receiving platform away from the water bottom through the platform lifting system, and lifts the The regasification platform and/or LNG storage platform in the LNG receiving platform are lowered to the water surface and float.

13. For the prison platform required in 12, the platform lifting system mentioned above uses hydraulic lifting, gear climbing or pulley pure cable stretching to lift the regasification platform and/or 1J storage platform.

14. The platform of claim 11, wherein the LNG receiving platform passes through a ballast gasification platform and/or an LNG storage platform, or an underwater facility that can be raised and lowered, and the platform is placed on a platform or fixed pile built underwater. or on subsea facilities, unloading ballast or lowering subsea facilities to float the regasification platform and/It LN(J storage platform.

15. The platform of claim n, wherein the LNG receiving platform is arranged in a sealable enclosure structure, the water in the enclosure is pumped out, and the regasification platform and the LNG storage platform are closed in the enclosure. The base is used to float the regasification platform and/or LNG storage platform by adding water to the enclosure.

16. The platform of claim 11, wherein the distance between the regasification platform and the LNG storage platform is adjustable to achieve high safety performance.

17. The platform of claim 11, wherein the LNG receiving platform is connected to the LNG storage platform through an LNG transmission system for transporting liquefied gas.

18. The platform as claimed in claim 〗〗, wherein the regasification platform and the LNG storage platform have shipboard power facilities at each corner, which can be introduced from the shore, and both can be designed as platforms with very shallow drafts.