KR20160088682A - Floating LNG - Google Patents

Abstract

The present invention relates to a floating production storage and offloading (FPSO) system for liquefied natural gas (LNG), and more specifically, to an FPSO system for LNG, which minimizes interference and discordance in a connecting part between hull parts, shortens a period required for production, reduces manufacturing costs and a weight, minimizes generation of boil-off gas by reducing a heat inflow rate by minimizing a surface area of a storage tank, enables the storage tank to be relatively safe from a sloshing impact, and facilitates formation of an integral structure for winterization. The FPSO system for LNG in accordance with the present invention is characterized in that each of a first hull pat for storing LNG and a second hull part for treating LNG is blocked to be longitudinally connected.

Description

Floating Natural Gas Production Storage and Handling Facility (FLNG) {Floating LNG}

The present invention relates to FLNGs, and more particularly to FLNGs that enable optimal placement of structures, equipment, and the like.

In general, floating LNG (FLNG) is a type of offshore plant or drillship that is used to transport LNG from offshore or offshore to LNG carriers. Demand for LNG is growing due to its demand and its usefulness.

A conventional technology for FLNG is the hydrocarbon processing vessel and method of Korean Patent Laid-Open No. 10-2012-0136353. A hydrocarbon processing vessel having an elongated hull comprising longitudinal sides, a base extending between the sides, a hull top and a deck positioned between the sides and a longitudinal intermediate plane between the longitudinal sides, A plurality of first storage tanks disposed on a starboard side of a longitudinal midplane, and a plurality of second storage tanks disposed on a port side of the longitudinal midplane in a symmetrical and parallel arrangement with the plurality of first storage tanks A plurality of second storage tanks and at least one longitudinal bulkhead extending along the midplane and located between adjacent first and second storage tanks.

Conventional FLNGs follow the arrangement of conventional oil FPSO (Floating Production Storage Offloading), the lower part being a ship type structure and the upper part being a reinforcing beam structure. Therefore, the conventional FLNG is classified into a topside and a hull on the basis of the main deck, and the topside arrangement facilities include a gas pretreatment and liquefaction facility, an operation and ancillary facility, a residence and a control room, Boom (boom), hull arrangement facilities include liquefied natural gas storage tanks, reactant storage tanks, cycle chambers, auxiliary engine rooms, mooring devices, etc. Facilities installed over the hull and superstructure There is a turret. The hull is designed as a ship type (plate structure), and the upper structure is designed as a stiffened beam structure. The habitat is constructed as a block in the form of an independent plate structure.

However, since the conventional FLNG is divided into a superstructure and a hull, it is possible to make it double, but interference or inconsistency frequently occurs at the connection part. Especially, since FLNG has many equipment or equipment to be installed, And more frequent problems.

In addition, the conventional FLNG requires a supporting structure for supporting a separate upper structure at the point where the upper structure and the hull are connected to each other, resulting in increasing the center of gravity, and the upper structure is provided with a skid the LNG storage tank is arranged long in the longitudinal direction of the hull so that the moving distance of the LNG having a characteristic of liquefaction at -163 DEG C or less is prolonged to increase the heat inflow amount, And the amount of installation is also increased.

In addition, the conventional FLNG has a problem in that when the LNG storage tank is small and long in the longitudinal direction of the hull, the surface area of the storage tank is increased and the amount of heat input from the outside is increased. Strengthening of the evaporative gas suppression ability is an essential technology area because the boiling point (BOP) rate is mentioned as the first standard of quality excellence for LNG storage facilities.

In addition, since conventional FLNG floats on the sea and fixes its position, sloshing countermeasures inside the LNG storage tank are important, and since the upper structure and the hull are separated from each other in the vertical direction, Which has a problem of becoming complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to minimize interference and inconsistency at a connection portion between hull portions, shorten the time required for fabrication, reduce drying cost, By minimizing the surface area of the tank, it is possible to minimize the generation of evaporative gas in the storage tank by reducing the amount of heat inflow. In addition, the storage tank is made relatively safe from sloshing impact and has an integral structure for winterization So as to facilitate the formation of the film.

According to an aspect of the present invention, there is provided an FLNG in which a first hull for storing LNG and a second hull for processing LNG are blocked and connected back and forth.

The first hull part is provided with a plurality of storage tanks for storing LNG and is located in the middle of the hull, and the second hull part is provided with a pretreatment device and a liquefaction facility of LNG, .

And a third hull part which is composed of a block in which a cyclic chamber and a dwelling part are disposed and which is located at a stern or a bow of the hull corresponding to the opposite side of the first hull part with the first hull part therebetween.

In the first hull part, the storage tanks may be arranged in multiple stages in the height direction.

The first hull portion may be provided with a connection portion for communicating the storage tanks arranged up and down.

In the first hull part, the storage tanks may be arranged in one stage in the height direction.

A reactant tank and a cooling water tank may be positioned between the first and second hull sections.

The reactant tank and the cooling water tank may be located inside the hull.

Operational and auxiliary utilities may be located between the first and second hull sections.

In the second hull part, any one of the pretreatment equipment and the liquefaction equipment may be disposed inside the hull, and the remaining one may be disposed on the hull.

The second hull portion may have a structure for opening the facilities disposed on the upper side of the pre-treatment facility and the liquefaction facility.

The second hull portion may have a structure in which an equipment installed at an upper portion of the pretreatment facility and the liquefaction facility is closed by extending the outer shell of the hull.

In the third hull section, the accommodation port may be disposed above the cycle chamber.

The third hull portion may further include a cockpit disposed on the upper side of the dock.

According to another aspect of the present invention, there is provided an FLNG in which a first hull portion for storing LNG and a second hull portion for processing LNG are arranged before and after. Here, a third hull portion in which the cyclic chamber and the dwelling portion are disposed may be located at the stern or bow of the hull corresponding to the opposite side of the second hull portion with the first hull portion interposed therebetween.

According to the present invention, it is possible to minimize the interference and the inconsistency at the connection portion between the hull portions by making it possible to design and manufacture the hull portion mainly for the storage tank and the hull portion for the process, By arranging equipments or facilities having the same characteristics in bundle unit, it is possible to minimize the length of electric and pipeline lines, thereby reducing the drying cost and reducing the weight, and the outside of the storage tank It is possible to suppress the generation of evaporation gas due to the small surface area exposed and to make the storage tank relatively safe from the sloshing impact by allowing the storage tank to be located at the center of the ship and to provide an integral structure for winterization Thereby facilitating formation.

1 is a side sectional view showing an FLNG according to a first embodiment of the present invention.
2 is a cross-sectional view taken along line A-A 'in Fig.
3 is a cross-sectional view taken along the line B-B 'in Fig.
4 is a side cross-sectional view showing an FLNG according to a second embodiment of the present invention.
5 is a side cross-sectional view showing the FLNG according to the third embodiment of the present invention.
6 is a side cross-sectional view showing an FLNG according to a fourth embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the following examples can be modified in various forms, and the scope of the present invention is not limited to the following examples.

1 is a side sectional view showing an FLNG according to a first embodiment of the present invention.

1, the FLNG 100 according to the first embodiment of the present invention includes a first hull 110 for storing LNG, a second hull 120 for processing LNG, The first hull 110 for storing the LNG and the second hull 120 for treating the LNG may be blocked and connected back and forth. In the FLNG 100 according to the first embodiment of the present invention, the third hull part 130 is connected to the hull 150 on the opposite side of the second hull part 120 with the first hull part 110 therebetween. The stern of a player or a player.

The first hull part 110 may include a plurality of storage tanks 111 for storing LNG and may be located in the middle of the hull 150.

The second hull section 120 may be provided with a pretreatment system 121 and a liquefaction system 122 of the LNG and may be positioned at a forward or aft end of the hull 150. In this embodiment, To the bow of the hull (150).

A reactant tank 141 and a cooling water tank 142 may be positioned between the first and second hull sections 110 and 120, respectively. Here, the reactant tank 141 may be, for example, a condensate tank. The reactant tank 141 and the cooling water tank 142 may be located inside the hull 150. Operation and auxiliary utilities 143 may also be located between the first and second hull sections 110, 120.

The third hull part 130 is composed of a block in which a main machinery room 131 and a living quarter 132 are disposed and is connected to the second hull part 120 Of the hull 150, and is located at the forefront of the hull 150 in this embodiment, for example. The third hull part 130 may be disposed on the upper side of the cycle chamber 131 in consideration of the optimization and accessibility of the habitat environment as in the present embodiment. In addition, a control room 133 may be disposed on the upper side of the hull 132 of the third hull part 130 to secure a view. The third hull section 130 may be provided with an auxiliary machinery room 134 disposed in front of and behind the habitat 132 on the upper side of the cycle chamber 131.

The second hull part 120 includes a fourth hull part 160 provided with a vent boom 161 and a turret and a gas inlet system 162. The first hull part 110, 210, and 310, it is possible to shorten the travel distance of the mined gas.

As shown in FIG. 2, the first hull part 110 can be arranged in multiple stages in the height direction of the storage tanks 111, and furthermore, the storage tanks 111 can be arranged in a plurality in the width direction. The number of stacking of the storage tanks 111 may be selected depending on the size of the hull 150, the capacity of the storage tanks 111, and the like. Here, the side of the hull 150 indicates that the LNG carriers 10 for transporting the LNG are moored, which is also the case in Fig.

As shown in FIGS. 1 and 3, the second hull part 120 may be arranged such that any one of the pretreatment facility 121 and the liquefaction facility 122 may be disposed inside the hull 150, One can be placed. In this embodiment, for example, the pretreatment apparatus 121 is disposed inside the hull 150, and the liquefaction apparatus 122 is disposed above the pretreatment apparatus 121, but the apparatus may be disposed in reverse. The second hull part 120 may have a structure for opening a facility disposed above the preprocessing facility 121 and the liquefaction facility 122, for example, the liquefaction facility 122.

4 is a side cross-sectional view showing an FLNG according to a second embodiment of the present invention.

As shown in FIG. 4, the FLNG 200 according to the second embodiment of the present invention is the same as the FLNG 100 according to the first embodiment of the present invention, And a connecting portion 212 for communicating with the storage tank 211 is provided. The connecting portion 212 is located between the upper and lower storage tanks 211 and provides at least one or more passages for passage of the LNG between the storage tanks 211 so that the storage tanks 211, So that only one of the storage tanks 211 stacked up and down when loading or unloading the LNG can be used.

5 is a side cross-sectional view showing the FLNG according to the third embodiment of the present invention.

As shown in FIG. 5, the FLNG 300 according to the third embodiment of the present invention is the same as the FLNG 100 according to the first embodiment of the present invention, 311 are arranged in one stage in the height direction. Accordingly, the storage tanks 311 are disposed in a single stage, thereby facilitating the loading and unloading of the LNG to the storage tank 311.

6 is a side cross-sectional view showing an FLNG according to a fourth embodiment of the present invention.

6, the FLNG 400 according to the fourth embodiment of the present invention is the same as the FLNG 100 according to the first embodiment of the present invention, and the second hull part 420 is the same as the FLNG 100 according to the first embodiment of the present invention, 421 and the liquefaction facility 422 may be closed by extending the outer shell 451 of the hull. Therefore, it facilitates the formation of an integral structure for winterization when operating in the polar regions. The outer sheath 451 may also be configured to close both the working and auxiliary equipment 443 when extended.

According to the FLNG according to the present invention, it is possible to design and manufacture the hull part mainly composed of the storage tank and the hull part mainly the process, thereby minimizing the interference and the inconsistency at the connection part between the hull parts, The length of the electric and pipeline lines can be minimized by arranging the equipments or facilities having the same characteristics in a bundle unit, thereby reducing the drying cost and the weight.

Further, according to the FLNG according to the present invention, it is possible to minimize the surface area where the outside of the storage tank having the upper and lower laminated structure is exposed to the outside air, thereby reducing the heat loss and minimizing the generation of the evaporative gas, Making the storage tank relatively safe from sloshing impacts and facilitating the formation of an integral structure for winterization.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is.

110, 210, 310: first hull 111, 211, 311: storage tank
120, 420: second hull section 121, 421: pretreatment facility
122, 422: Liquefaction facility 130: Third hull section
131: Periodic room 132: Residential area
133: cockpit 134: auxiliary engine room
141: Reactant tank 142: Coolant tank
143,443: Operation and auxiliary equipment 150: Hull
160: Fourth hull section
161: Bent boom 162: turret and gas inlet system
212: connection part 451: outside plate

Claims (17)

And a first hull for storing LNG and a second hull for treating LNG are blocked and arranged in the longitudinal direction. The method according to claim 1,
The first hull portion includes:
A plurality of storage tanks for storing LNG are arranged,
The second hull portion
A FLNG in which a pretreatment facility and a liquefaction facility for LNG are located and located at the forward or aft end of the hull. The method of claim 2,
And a third hull portion formed of a block in which the cyclic chamber and the dwelling portion are disposed and located at a stern or a bow of the hull corresponding to the opposite side of the first hull portion with the first hull portion interposed therebetween. The method according to any one of claims 1 to 3,
The first hull portion includes:
Wherein the storage tank is formed in multiple stages in the height direction. The method of claim 4,
The first hull portion includes:
The FLNG is provided with a connecting portion for allowing the storage tanks disposed above and below to communicate with each other. The method according to any one of claims 1 to 3,
The first hull portion includes:
And the storage tank is formed in one stage in the height direction. The method according to any one of claims 1 to 3,
And a reactant tank and a cooling water tank are located between the first and second hull sections. The method of claim 7,
The reactant tank and the cooling water tank are connected to each other through a pipe,
FLNG located inside the hull. The method according to any one of claims 1 to 3,
And an operating and auxiliary utilities located between the first and second hull sections. The method of claim 2,
The second hull portion
Wherein one of the pretreatment facility and the liquefaction facility is disposed inside the hull and the other is disposed on the upper side thereof. The method of claim 10,
The second hull portion
Wherein the pretreatment facility and the facility disposed above the liquefaction facility are opened. The method of claim 10,
The second hull portion
And an upper portion of the pretreatment facility and the liquefaction facility is closed by extending an outer shell of the hull. The method of claim 3,
The third hull portion includes:
And the housing is disposed above the cycle chamber. 14. The method of claim 13,
The third hull portion includes:
And a cockpit disposed on the upper side of the accommodation port. Wherein the first hull part for storing the LNG and the second hull part for treating the LNG are connected to each other in the longitudinal direction. 16. The method of claim 15,
And a third hull section in which the cyclic chamber and the accommodation section are disposed is located at a stern or a bow of the hull corresponding to the opposite side of the second hull section with the first hull section therebetween. The method according to any one of claims 1 to 15,
The second hull portion
And a fourth hull section provided with a vent boom and turret and gas inlet system is connected to the opposite side of the first hull section to be connected to the first hull section.

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