KR100747373B1 - System and method for carrying equipments of lng carrier for its maintenace and lng carrier - Google Patents

Abstract

A system and a method for carrying equipment of an LNG carrier for maintenance and an LNG carrier are provided to reduce the need of much carrying equipment by allowing only two cranes to carry all equipment in a turret section and near the turret section. A system for carrying equipment of an LNG carrier is provided to maintain equipment for regasification of LNG and transmission of a gas. The system includes a first crane(70) and a second crane(80). The first crane stands at one spot on the carrier to move equipment to be maintained in a range of a first work region. The second crane stands at another spot on the carrier so move the equipment in a range of a second work region partially overlapping the first work region. The second crane moves the equipment moved by the first crane outside the first work region.

Description

SYSTEM AND METHOD FOR CARRYING EQUIPMENTS OF LNG CARRIER FOR ITS MAINTENACE AND LNG CARRIER}

1 conceptually illustrates an LNG regasification vessel;

FIG. 2 is a front view of an LNG regasification vessel including a facility transport system according to an embodiment of the present invention. FIG.

3 is a plan view of an LNG regasification vessel comprising a facility transport system according to an embodiment of the present invention.

4 is a view illustrating a state in which the facility carrying system according to an embodiment of the present invention carries the equipment to be maintained to the outside of the ship.

5 is a view showing a state in which the facility transport system according to an embodiment of the present invention to lift the facility to be maintained from the turret portion of the LNG regasification vessel.

<Description of Symbols for Major Parts of Drawings>

70: first crane 80: second crane

90: maintenance platform device 3: turret

C1: first working area C2: second working area

C3: overlapping area

The present invention relates to LNG carriers, inter alia, LNG regasification vessels, and more particularly, to maintenance facilities for LNG regasification vessels, in particular for the facilities used for LNG regasification or gas delivery. It relates to a system and method for conveying.

In recent years, the consumption of natural gas is rapidly increasing worldwide. Natural gas is transported in a gaseous state through onshore or offshore gas piping, or to a remote consumer while stored in an LNG carrier (especially an LNG carrier) in the form of liquefied natural gas. Liquefied natural gas is obtained by cooling natural gas to cryogenic temperature (approximately -163 ℃), and its volume is reduced to about 1/600 than natural gas in gas state, so it is very suitable for long distance transportation through sea.

The LNG Carrier is designed to unload liquefied natural gas to the land requirements by loading the liquefied natural gas into the sea, and for this purpose, an LNG storage tank (commonly referred to as a 'cargo') that can withstand the cryogenic temperature of the liquefied natural gas. It includes. Normally, such LNG transport ships unload liquefied natural gas in LNG storage tanks as they are liquefied, and the unloaded LNG is regasified by LNG regasification facilities installed on land and then transported through gas piping to consumers of natural gas. do.

Such onshore LNG regasification facility is known to be economically advantageous when installed in a place where there is a demand for natural gas because the natural gas market is well formed. However, in the case of natural gas demand where the demand for natural gas is seasonal, short-term or periodic, it is economically disadvantageous to install LNG regasification facilities on land due to the high installation cost and management cost.

In particular, if a land LNG regasification facility is destroyed due to a natural disaster or the like, even if an LNG carrier arrives at a required destination, the LNG cannot be regasified. Holding it.

Accordingly, for example, LNG regasification vessels have been developed for providing LNG regasification facilities in LNG carriers, regasifying liquefied natural gas at sea, and supplying natural gas obtained through regasification to land. Further, prior arts related to such LNG vessels include Korean Patent No. 0569621 (ExxonMobil Oil Corporation, Method and System for Gasification of Liquefied Natural Gas on Transport), and US Patent No. 6,546,739 (Exmar Offshore Company, Method and apparatus for offshore) LNG regasification, US Pat. No. 6,578,366 (Moss Maritime AS, Device for evaporation of liquefied natural gas), US Pat. No. 6,688,114 (El Paso Corporation LNG CARRIER, US Pat. No. 6,598,408 (El Paso Corporation, Method and apparatus for transporting) LNG), Korean Patent No. 0467963 (Kang Do-wook, R & G Alv operation method), US Patent No. 6,945,049 (Hamworthy KSE as, Regasification system and method), Korean Patent No. 0504237 (Daewoo Shipbuilding & Marine Co., Ltd., bottom) Vessels with shielding means to block the openings), Korean Patent No. 0474522 (Daewoo Shipbuilding & Marine Engineering Co., Ltd., seawater heating system), Han Patent Publication No. 2003 -0090686 (Life Hoeg Unt.A.S., Ship and Unloading System), US Patent Publication No. 2005-0061002A (Shipboard regasification for LNG carriers with alternate propulsion plants), Korean Patent Publication No. 2004- 0105801 (Excelate Energy Limited Partnership, Improved LNG Carrier) and Korean Utility Registration No. 0410836 (Samsung Heavy Industries Co., Ltd., Liquefied Natural Gas Regasification System).

The LNG regasification vessel is equipped with regasification facilities such as a high pressure pump and a carburetor for regasification of liquefied natural gas stored in an LNG storage tank, and a turret portion which is a portion where the seabed buoy is docked for gas delivery. It is provided so that it leads to from the bottom. In addition, the LNG regasification vessel includes a vessel position maintaining device for maintaining the position of the vessel while the natural gas is unloaded while the turret portion and the seabed are docked and coupled.

In using a conventional LNG regasification vessel, maintenance of these facilities when there is a failure or abnormality in the facilities required for regasification operation or gas delivery, for example, regasification facilities such as a high pressure pump or various facilities in the turret. For this purpose, the LNG regasification vessel was anchored near the land, transported by land crane to the land maintenance position, and then repaired or repaired for the facilities. In addition, the conventional LNG regasification vessel required a lot of transportation equipment for transporting the equipment to be maintained to the extent that the crane on land to reach. Therefore, the conventional LNG regasification vessel has been time-consuming and economical in that it must be moved to the place where the land crane is located whenever the maintenance of the facility is required. In addition, there is a big disadvantage that a lot of unnecessary equipment for transporting the conventional equipment to be maintained on the ship to the position of the land crane is required.

Accordingly, it is an object of the present invention to provide an LNG configured to efficiently transport equipment used for regasification or gas delivery by first and second cranes with overlapping work areas to a maintenance area on board, a barge, or a maintenance location on land. The present invention provides a facility transport system and a facility transport method of a regasified ship.

It is another object of the present invention to provide an LNG regasification vessel capable of carrying equipment to be serviced by land or barges outside the vessel by using at least one crane provided in the vessel.

In order to achieve the above object, the present invention provides a facility transport system of an LNG regasification vessel to maintain facilities necessary for LNG regasification or gas delivery. An equipment transport system for an LNG regasification ship according to the present invention includes: a first crane that moves at a point on a ship to be installed and maintained within a range of a first work area; A facility which is built at another point on the ship so as to move the equipment to be maintained within a range of a second working region which partially overlaps the first working region, and which can move the equipment moved by the first crane out of the first working region; Includes 2 cranes.

According to one embodiment of the invention, the second working area by the second crane is extended to the outside of the ship, the maintenance area for facility maintenance on the ship in the second working area by the second crane is To be prepared. More preferably, the maintenance zone is provided with a maintenance platform device for maintaining the equipment to be maintained on a platform away from the ship by a certain height.

According to another embodiment of the present invention, the vessel is provided with a turret portion coupled to the seabed, the first crane and the second crane is arranged on both sides of the turret portion to move the equipment in the turret portion do. Further, first and second high pressure pump sets for boosting liquefied natural gas are respectively disposed in each of the first work area and the second work area. In addition, the second working area is provided with a maintenance platform device for maintaining the high pressure pump of the first high pressure pump set and the second high pressure pump set on a platform of a predetermined height from the ship.

Example

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 schematically shows an LNG regasification vessel. As shown in FIG. 1, the LNG regasification vessel 1 includes an LNG storage tank 101, a suction drum 10 for temporarily storing liquefied natural gas drawn up from the LNG storage tank 101, and The plurality of high-pressure pump 20 for pressurizing the liquefied natural gas supplied from the suction drum 10 and the high-pressure pump 20 (only one) is boosted in each of the supplied liquefied natural gas heat exchange medium It includes a plurality of vaporizers 40 for regasifying using. The vaporizer 40 may use only seawater or fresh water as a heat exchange medium, or may use an intermediate heat exchange medium (eg, propane, ethane, ammonia) together (as disclosed in US 6945049).

The LNG regasification vessel (1) has a turret (3), which is floating on the seabed (hereinafter referred to as 'sea buoy') and a turret portion (3) docked, the turret portion (3) from the ship to the bottom They are docked and docked with the seabed 4 at the mating cone of the bottom. Thus, the submerged turret 4 is connected to the turret 3 of the ship, and the submarine 4 is connected to the ship's piping and the subsea terminal 6 by a riser 9. Loading) scheme was developed by the applicant and already known.

2 and 3 are a front view and a plan view showing an LNG regasification vessel according to an embodiment of the present invention. In Figures 2 and 3, components that are not directly related to the technical spirit of the present invention have been omitted in order to avoid complicated drawings, and elements that are not shown in actual plan view or front view but which are necessary for the description of the present invention. Is shown in the drawings for the understanding of the invention.

2 and 3, the turret 3 is located approximately at the center of the bow of the LNG regasification vessel 1, and each of the three high pressure pumps 20 in both directions behind the turret 3. The first and second high pressure pump sets 2a and 2b each of which are arranged are arranged. In addition, the first and second cranes 70 and 80 constituting the facility transport system according to the present invention are erected from the left and right sides. In addition, the turret portion 3 is positioned between the first crane 70 and the second crane 80, and the first crane 70 and the second crane 80 are the first and second cranes. It is positioned to correspond with the second high pressure pump set 2a, 2b.

The first and second cranes 70 and 80 include posts 72 and 82 and arms 74 and 84 that can be rotated in the radial and vertical directions about the posts 72 and 82. do. In addition, the first and crane cranes 70 and 80 include rope tow portions 76 and 86 extending vertically downward from the arms 74 and 84, and the rope tow portions 76 and 86 are support posts. It is configured to move the object suspended on the ropes at the end of the rope tow 76, 86 while moving up and down by the driving means provided on the 72, 82 or the arms 74, 84. As described above, the structures of the first and second cranes 70 and 80 are well known to those skilled in the art, and cranes having various structures and shapes may be used as the first and second cranes 70 and 80 of the present invention. The detailed description thereof will be omitted.

In the present embodiment, it is preferable that the second crane 80 has a relatively large working area compared to the first crane 70 and its capacity is also larger than that of the first crane 70. The working area of the first and second cranes 70 and 80 means the inner range of the circle trajectory that occurs when the arms 74 and 84 pivot to the maximum radius in a horizontal state. In addition, the first and second cranes 70 and 80 may perform the conveying operation only for the equipment in the working area.

As best shown in FIG. 3, the first and second cranes 70, 80 comprise first and second working areas C1, C2, the first working area C1 and the second working area. The region C2 includes regions overlapping each other. For convenience of explanation, an area indicated by a hatch in which the first work area C1 and the second work area C2 overlap is called an overlap area, and the overlap area is denoted by the member number C3 in FIG. 3. As already mentioned, the overlap area C3 corresponds to both the first work area C1 and the second work area C2.

2 and 3, the first and second cranes 70 and 80 may include any of the facilities that need maintenance, among the facilities arranged in their first and second working areas C1 and C2. Move to position Among other things, the first crane 70 is one of the facilities located in the first work area C1, for example, any of the facilities in the high pressure pump 20 or the turret portion 3 of the first high pressure pump set 2a. It serves to transport equipment, etc., which need maintenance, into the overlapping area C3 in the second working area C2. In addition, the second crane 80 is equipped with facilities located in the second working area C2, for example, the high pressure pump 20 of the second high pressure pump set 2a, any facility in the turret portion 3 or the first. It serves to transport the equipment which has been moved to the overlapping area C3 by the crane 70 to the ship's maintenance position on the ship or the land, or to the barge outside the ship.

As described above, the first and second working areas (C1, C2) of the first and second cranes (70, 80) overlap to form one overlapping area (C3), the equipment transport system according to this embodiment , Using the first crane 70 to transport the equipment in the first working area C1 into the second working area C2, and then, using the second crane 80, the transported equipment to an arbitrary position. In a conveying manner, almost all the facilities required for the regasification and gas delivery of the LNG regasification vessel 1 can be carried by a designated facility maintenance position or by a barge that moves the facility to the land.

The second working area C2 extends to the outside of the LNG regasification vessel 1 to transport the equipment to be serviced by the second crane 80 to the land or barge outside the ship, for this expansion. The arm 84 of the second crane 80 is configured to extend beyond the side of the LNG regasification vessel 1 in a horizontal state. On the other hand, in the second working area (C2) is provided a separate maintenance area (C4) which is located in the maintenance facility or maintenance device. By providing the maintenance zone C4, the LNG regasification vessel 1 can perform maintenance on almost all the facilities required for regasification and gas delivery in itself. At this time, the maintenance zone (C4) is not limited to the zones shown in the drawings and may be provided anywhere in the second working area (C2) as long as the arm 84 of the second crane 80 can reach. However, a location where an existing facility of the LNG regasification ship 1 is located or interference with the facility is excluded.

In addition, a maintenance platform device 90 is installed in the maintenance zone C4 to maintain the equipment to be maintained, most preferably, to maintain the high pressure pump 20 to be maintained at a predetermined height from the ship. . In this embodiment, the maintenance platform device 90 is optimized to be suitable for the maintenance of the high pressure pump 20, which is well illustrated in FIG.

FIG. 4 is a view illustrating a state in which the equipment to be maintained is transported to the outside of the LNG regasification vessel 1, and FIG. 4 is also provided with a maintenance platform device 90 for maintaining the high pressure pump 20 in the vessel. have.

As shown in FIG. 4, the maintenance platform device 90 is configured to vertically hold the high pressure pump 20 and the like at a predetermined height from the ship. To this end, the maintenance platform device 90, the platform 92 is installed at a predetermined height from the ship to maintain the high-pressure pump 20 and the like, and the maintenance worker can be climbed above the platform 92 from the ship And a vertical ladder 94 formed to be such.

In addition, as described above, a state in which the facility M to be maintained by the second crane 80 is transported to the barge 300 outside the ship is well illustrated in FIG. 4. Since the second crane 80 is provided with the length of its own arm 84 beyond the side of the ship at the bow of the ship, it can preferably carry the facility M to be maintained by the barge 300 outside the ship. . This means that when the LNG regasification vessel 1 is anchored near the land, the facility M can also be transported on land using the second crane 80. For convenience of description, the facility M to be maintained and the high pressure pump 20 are marked as different, but it will be apparent to those skilled in the art that the facility M that can be transported to the outside of the ship may be a high pressure pump for maintenance. That would be one.

FIG. 5 is a view showing a state in which the facility carrying system according to the present embodiment carries the facility M which requires maintenance among the facilities in the turret portion 3. In FIG. 5, only the second crane 80 having a large capacity (for example, 10 tons) is shown as a crane for carrying the equipment of the turret portion 3, but the small capacity (for example, shown in FIGS. 2 and 3) is shown. 6 ton) of the first crane 70 may also be used to transport the equipment in the turret portion (3). As shown in FIG. 5, the second crane 80 is pivoted upward from the horizontal state with the arm 84 facing the turret portion 3. And, in the pivoted state, the arm 84 acts to lift the equipment M inside the turret portion 3, and lifts the equipment M to maintain the position in the ship or the land or the outside of the ship. It rotates toward the barge to carry the equipment (M).

At this time, to transport the equipment in the turret portion 3, when the first crane 70 shown in Figs. 2 and 3 instead of the second crane 80 is used, the crane 80 is a turret portion ( By lifting the equipment in 3), first, the first working area C1 and the second working area C2 shown in FIG. 3 are transported to the overlapping area C4 overlapped with each other. Then, the second crane 80 carries the equipment of the overlapping area C4 to the maintenance area in the above-described second working area C2 or the land or barge outside the ship.

 While the invention has been described above with reference to specific embodiments, various modifications, changes or modifications may be made in the art within the spirit of the invention and the appended claims, and thus the foregoing description and drawings illustrate It should be construed as illustrating the present invention, not limiting the technical spirit of the invention.

In the use of a normal LNG regasification vessel, when there is a failure or abnormality in the facilities necessary for regasification operation or gas discharge, for maintenance of these facilities, the LNG regasification vessel is anchored near the land, and then The cranes were transported to the on-shore maintenance position for maintenance, such as repair or maintenance of the facilities.

However, according to the present invention, by using the first and second cranes provided on the ship, substantially all the facilities required for the regasification operation or the gas delivery of the ship can be carried to the maintenance position in the ship or to the barge or land outside the ship, As a result, the LNG regasification vessel can be anchored near the land, and then a lot of labor and economic burden of carrying the equipment to be maintained by the crane on land can be eliminated.

In addition, the present invention is because only two cranes are responsible for the transport of all the equipment in the turret and / or near the turret, it can greatly reduce the need for a number of transport equipment that was used for the transport of equipment on board There is a big economic advantage.

Claims (18)

An LNG carrier ship's facility transport system provided to maintain facilities required for LNG regasification or gas delivery, A first crane which is installed at one point on the ship and moves the equipment to be maintained within the range of the first work area; A facility which is built at another point on the ship so as to move the equipment to be maintained within a range of a second working region which partially overlaps the first working region, and which can move the equipment moved by the first crane out of the first working region; Two cranes; Facility transport system for an LNG transport ship comprising a. The system of claim 1, wherein the second working area by the second crane extends to the outside of the ship. The facility transport system for an LNG carrier according to claim 1, wherein a maintenance area for facility maintenance is provided on the ship in the second working area by the second crane. The system according to claim 1, wherein the second working area by the second crane extends to the outside of the ship, and a maintenance area of the facility is provided on the ship in the second working area. The facility transport system of claim 4, wherein the maintenance zone is provided with a maintenance platform device that maintains a facility to be maintained on a platform away from the ship. The ship according to claim 1, wherein the vessel has a turret portion coupled to the seabed portion, wherein the first crane and the second crane are disposed on both sides of the turret portion to move the equipment in the turret portion. Facility transport system of the LNG carrier, characterized in that The system of claim 1 or 5, wherein the first and second high pressure pump sets for boosting liquefied natural gas are respectively disposed in each of the first work area and the second work area. . The LNG carrier according to claim 7, wherein the second working area is provided with a maintenance platform for maintaining the high pressure pumps of the first high pressure pump set and the second high pressure pump set on a platform of a predetermined height from the ship. Equipment conveying system. The facility of claim 1, wherein the first and second cranes are used for maintenance of facilities in the turret located at the center of the bow and left and right at the bow, and for regasification facilities on both sides of the turret. Conveying system. As a method of transporting a facility of an LNG carrier that transports the facilities for regasification or gas discharge, Providing first and second cranes each having a first work area and a second work area so that the work areas overlap at two points on the ship; Moving the equipment in the first work area and the second work area by first and second cranes, respectively; The second crane receives a facility moved to a position where the work area overlaps by the first crane to move the facility of the LNG carrier, characterized in that for moving to another position. The method according to claim 10, wherein the second working area by the second crane is extended to the outside of the ship, the facility to be maintained using the second crane to move the land or barge outside the ship. LNG carriers equipment installation method. The method of claim 10, wherein the maintenance area for the maintenance of the equipment in the second working area by the second crane by providing a facility to be maintained by using the second crane to move to the maintenance area, characterized in that How to transport facilities of LNG carriers. The method according to claim 12, characterized in that the maintenance platform device for maintaining the equipment to be maintained in the maintenance area on a platform that is a certain height away from the ship. The LNG system according to claim 10, wherein the vessel has a turret portion coupled to the seabed portion, and the first crane and the second crane are disposed on both sides of the turret portion to move the equipment in the turret portion. Method of transporting equipment on the ship. The method of claim 10, wherein each of the first working area and the second working area is arranged with a set of first and second high pressure pump for boosting the liquefied natural gas, respectively. The LNG system as claimed in claim 15, wherein the second working area provides a maintenance platform for maintaining a high pressure pump separated from the first high pressure pump set and the second high pressure pump set on a platform of a shipboard. Method of transporting equipment on the ship. In an LNG carrier that reliquefies liquefied natural gas on a ship and supplies regasified gas to onshore land, And a crane mounted on board to carry the equipment to be maintained with the support and the arm, wherein the crane has its arm extended out of the ship, and its working area extends out of the ship. LNG Carrier. 18. The LNG carrier according to claim 17, wherein another crane having a different work area overlapping with the work area of the crane is erected on the ship.

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