KR20160073707A - Managing method of liquefied natural gas carrier - Google Patents

Managing method of liquefied natural gas carrier Download PDF

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Publication number
KR20160073707A
KR20160073707A KR1020140182337A KR20140182337A KR20160073707A KR 20160073707 A KR20160073707 A KR 20160073707A KR 1020140182337 A KR1020140182337 A KR 1020140182337A KR 20140182337 A KR20140182337 A KR 20140182337A KR 20160073707 A KR20160073707 A KR 20160073707A
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KR
South Korea
Prior art keywords
natural gas
liquefied natural
cargo hold
water
carrier
Prior art date
Application number
KR1020140182337A
Other languages
Korean (ko)
Inventor
박태근
Original Assignee
삼성중공업 주식회사
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Publication date
Application filed by 삼성중공업 주식회사 filed Critical 삼성중공업 주식회사
Priority to KR1020140182337A priority Critical patent/KR20160073707A/en
Publication of KR20160073707A publication Critical patent/KR20160073707A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J1/00—Arrangements of installations for producing fresh water, e.g. by evaporation and condensation of sea water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D9/00—Apparatus or devices for transferring liquids when loading or unloading ships

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention relates to an operation method for a liquefied natural gas carrier, which can improve operation efficiency of a liquefied natural gas carrier. According to an aspect of the present invention, the operation method for a liquefied natural gas carrier includes: a step of loading liquefied natural gas on a cargo hold of the liquefied natural gas carrier in a liquefied natural gas source; a step of moving the liquefied natural gas carrier to a liquefied natural gas demander; a step of unloading the liquefied natural gas in the liquefied natural gas demander; a step of charging a ballast tank of the liquefied natural gas carrier with ballast water when the liquefied natural gas carrier moves to the clean water demander and storing clean water in the cargo hold by changing the ballast water to the clean water; and a step of supplying the clean water to the clean water demander.

Description

Technical Field [0001] The present invention relates to a liquefied natural gas carrier,

The present invention relates to a method of operating a liquefied natural gas carrier.

A liquefied natural gas carrier is a ship that transports Liquefied Natural Gas (LNG) from the place of production or supply to the place of purchase or demand, and is usually abbreviated LNG carrier or LNGC (LNG Carrier). Liquefied natural gas (LNG) is liquefied at a temperature of minus 162 ° C at the atmospheric pressure, which is the main component of methane (CH 4 ). The volume ratio of liquid to gas of liquefied natural gas is about 1/600. It is common to carry gas liquefied.

Conventional liquefied natural gas carriers are operated from liquefied natural gas sources where liquefied natural gas is produced to liquefied natural gas sources after dropping liquefied natural gas. After completing the unloading of liquefied natural gas at the demand of liquefied natural gas, Gas service.

In other words, conventionally, the operation route of the liquefied natural gas carrier includes only the route between the liquefied natural gas supply source and the liquefied natural gas demand site, and accordingly, when the liquefied natural gas carrier operates the liquefied natural gas supply source, The operation efficiency of the liquefied natural gas carrier is remarkably decreased.

Korean Unexamined Patent Publication No. 2002-0027790

Embodiments of the present invention provide a method of operating a liquefied natural gas carrier capable of increasing the operating efficiency of a liquefied natural gas carrier.

According to an aspect of the present invention, there is provided a method for producing a liquefied natural gas, comprising: liquefying natural gas into a cargo hold of a liquefied natural gas carrier in a liquefied natural gas supply source; Moving the liquefied natural gas carrier to the liquefied natural gas consumer; Unloading the liquefied natural gas from the liquefied natural gas consumer; Filling the ballast tank of the liquefied natural gas carrier with the ballast water in the process of moving the liquefied natural gas carrier to the clean water consumer, converting the ballast water into clean water and storing the ballast water in the cargo hold; And supplying the fresh water to the clean water demander.

In addition, the step of converting the ballast water into fresh water and storing the ballast water in the cargo hold may convert the ballast water to fresh water using a desalination apparatus after filling the ballast water.

Further, after the step of supplying the fresh water to the clean water consumer, the liquefied natural gas carrier may further be moved to the liquefied natural gas supply source, thereby providing a method of operating the liquefied natural gas carrier.

Further, in the process of moving the liquefied natural gas carrier to the liquefied natural gas supply source, there is provided a method of operating a liquefied natural gas carrier in which the liquefied natural gas preparation step for removing the fresh water from the cargo hold can be further performed .

In addition, the liquefied natural gas carrier includes a warm up heater, an inert gas generator, a vaporizer, and a spray pump, Drying the humidifier in the cargo hold with the heater and injecting an inert gas generated by the inert gas generator into the cargo hold and supplying the natural gas vaporized by the vaporizer to the inside of the cargo hold to remove the inert gas from the cargo hold And a method of operating the liquefied natural gas carrier in which the liquefied natural gas is injected into the liquefied natural gas to cool the cargo hold can be provided.

Embodiments of the present invention can provide a method of operating a liquefied natural gas carrier capable of increasing the operating efficiency of a liquefied natural gas carrier.

1 is a view showing a navigation route of a liquefied natural gas carrier according to an aspect of the present invention.
2 is a flowchart illustrating a method of operating a liquefied natural gas carrier according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view showing a state in which liquefied natural gas is dripped into the cargo hold of the liquefied natural gas carrier of Fig. 2;
4 is a cross-sectional view showing a state in which liquefied natural gas is not dripped into the cargo window of Fig. 3;
5 is a cross-sectional view showing a state where clean water is stored in the cargo window of FIG. 3;

Hereinafter, specific embodiments for implementing the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the subject matter of the present invention.

2 is a flowchart illustrating a method of operating a liquefied natural gas carrier according to an aspect of the present invention, and Fig. 3 is a flowchart illustrating a method of operating a liquefied natural gas carrier according to an embodiment of the present invention. Sectional view showing a state in which liquefied natural gas is dripped into a cargo hold of a liquefied natural gas carrier.

1 to 3, a liquefied natural gas carrier according to an aspect of the present invention includes a liquefied natural gas supplier 10, a liquefied natural gas consumer 20, and a fresh water consumer 30, And the like. However, the operation route of the liquefied natural gas carrier according to the present embodiment does not necessarily include only the three points, and when the liquefied natural gas supply source 10 and the fresh water demand place 30 are at the same point, And may include a navigation route via the route.

The liquefied natural gas carrier according to the present embodiment may include a ballast tank 110 for adjusting the draft, a cargo window 120 for storing liquefied natural gas, and a desalination apparatus 200 for converting seawater into fresh water.

The liquefied natural gas stored in the cargo hold 120 may be used as a cooling material for cooling the facilities of the liquefied natural gas carrier in addition to the liquefied natural gas supplied to the liquefied natural gas consumer 20.

The desalination apparatus 200 includes a conveyance pipe 251 for guiding the ballast water from the ballast tank 110 to the cargo hold 120 through the desalination device 200 and a ballast tank 110 for circulating the ballast water filled in the ballast tank 110 to the pressure- A boosting unit 220 for boosting the ballast water to a predetermined pressure and a booster pump 230 for transferring the boosted ballast water to the reverse osmosis unit 240 . The desalination unit 200 may include a recovery pipe 252 for transferring the seawater recovered from the reverse osmosis unit 240 to the booster 220 and a brine discharge unit 260 for discharging the high concentration brine.

However, the desalination apparatus 200 according to the present embodiment is not limited to the desalination apparatus having the above-described structure, and may be a desalination apparatus operated by various structures and principles.

The liquefied natural gas carrier according to the present embodiment is constructed such that the liquefied natural gas is dumped in the liquefied natural gas supply source 10 and then the liquefied natural gas is discharged from the liquefied natural gas consumer 20 and the clean water is filled in the cargo window 120, (30).

3, the liquefied natural gas carrier including the cargo hold 120 may drop the liquefied natural gas into the cargo hold 120 in the liquefied natural gas supply source 10. In this case, ) May store liquefied natural gas. At this time, since the liquefied natural gas is fully stored in the hold 120, the ballast tank 110 of the liquefied natural gas carrier may not be filled with ballast water.

Thereafter, the liquefied natural gas carrier can be moved to the liquefied natural gas consumer 20 (S200).

4 is a cross-sectional view showing a state in which liquefied natural gas is not dripped into the cargo hold 120 of Fig.

Referring to FIG. 4, when the liquefied natural gas carrier reaches the liquefied natural gas consumer 20, the liquefied natural gas can be unloaded from the cargo hold 120 (S300). At this time, the liquefied natural gas is generally unloaded in a liquid state and then regenerated by a regeneration device installed on the land, and then it can be transferred through a gas pipe to a natural gas consuming place. After the liquefied natural gas is unloaded, the cargo hold 120 can be opened and the liquefied natural gas, which has not been unloaded and remains on the cargo hold 120, can be vaporized by the external temperature and pressure difference, 120 may be in a state where there is no remaining liquefied natural gas. Therefore, a separate preparation work for storing fresh water in the cargo hold 120 may not be performed at a later time.

When the loading of the liquefied natural gas from the cargo hold 120 is completed, the liquefied natural gas carrier can be moved to the fresh water user 30. In the moving process, after filling the ballast tank 110 of the liquefied natural gas carrier with the ballast water, It is possible to convert the ballast water into fresh water and store it in the cargo hold 120 (S400).

5 is a cross-sectional view showing a state where clear water is stored in the hold 120 of FIG.

Referring to FIG. 5, the ballast tank 110 is filled with seawater, and the desalinated water can be converted into fresh water by the desalination apparatus 200, and the converted fresh water can be stored in the cargo hold 120. And the ballast tanks 110 may become empty due to the movement of the ballast water to the hold 120.

When the liquefied natural gas carrier reaches the clean water consumer 30, fresh water can be supplied to the clean water consumer (S500), and the liquefied natural gas carrier can be moved to the liquefied natural gas supply source 10 (S600). At this time, since the hold 120 is in an empty state, the ballast tank 110 can be filled with the ballast water again.

The liquefied natural gas carrier is connected to the liquefied natural gas supply source 10 so that the liquefied natural gas carrier line can be immediately performed in the cargo hold 120 after the liquefied natural gas carrier arrives at the liquefied natural gas supply source 10. [ In the moving process, the liquefied natural gas dumping preparation step (S800) may be further performed.

Impurities such as a humidifier may exist in the inside of the cargo hold 120 where clean water is stored, so that an operation of removing such impurities can be performed before the arrival of the liquefied natural gas supply source 10. Specifically, a vessel such as a liquefied natural gas carrier may generally be equipped with a warm up heater, an inert gas generator, a vaporizer, and a spray pump. The drop preparation stage can be performed using the equipment.

First, the humidifier remaining in the cargo hold 120 can be dried by a heater, and then the humidifier can be removed by charging the inert gas generated by the inert gas generator in the cargo hold 120. The inert gas may be purged by introducing the liquefied natural gas into the hold 120 after converting the liquefied natural gas into a gaseous natural gas using a vaporizer. Then, the liquefied natural gas is sprayed by a spray pump to cool the inside of the cargo hold 120 in advance.

Through the above-described process, all the impurities reacting with the liquefied natural gas can be removed from the cargo hold 120, so that the liquefied natural gas dropping step S100 can be performed quickly at the liquefied natural gas supply source 10.

The operation method of the liquefied natural gas carrier according to the present embodiment can increase the operating efficiency of the liquefied natural gas carrier since the time required for the liquefied natural gas carrier to be operated in a collinear state is reduced.

It is to be understood that the embodiments described above are merely illustrative of some examples of the technical idea and the scope of the technical idea is not limited to the described embodiments, It will be understood that various changes, substitutions, and alterations may be made therein without departing from the spirit and scope of the invention.

10: Liquefied natural gas supply source 20: Liquefied natural gas demand place
30: Clean water demand place 110: Ballast tank
120: Cargo hold 200: Desalination device

Claims (5)

Dripping liquefied natural gas into a cargo hold of a liquefied natural gas carrier in a liquefied natural gas supplier;
Moving the liquefied natural gas carrier to the liquefied natural gas consumer;
Unloading the liquefied natural gas from the liquefied natural gas consumer;
Filling the ballast tank of the liquefied natural gas carrier with ballast water in the process of moving the liquefied natural gas carrier to the clean water consumer, converting the ballast water to fresh water and storing the ballast tank in the cargo hold; And
And supplying said clean water to said clean water consumer. The method according to claim 1,
Wherein the step of converting the ballast water into fresh water and storing the ballast water in the cargo hold includes:
And the balance water is converted into clean water by using a desalination apparatus after filling the ballast water. The method according to claim 1,
After the step of supplying the fresh water to the fresh water consumer,
Further comprising moving the liquefied natural gas carrier to the liquefied natural gas supply source. The method of claim 3,
In the course of moving the liquefied natural gas carrier to the liquefied natural gas supply source again,
Wherein the step of preparing the liquefied natural gas for removing the fresh water of the cargo hold can be further performed. 5. The method of claim 4,
The liquefied natural gas carrier includes a warm up heater, an inert gas generator, a vaporizer, and a spray pump,
The drop preparing step includes:
The inert gas generated by the inert gas generating device is injected into the cargo hold, and the natural gas vaporized by the vaporizer is supplied into the cargo hold to transfer the inert gas into the cargo hold, And the liquefied natural gas is injected into the liquefied natural gas by the spray pump to cool the cargo hold.
KR1020140182337A 2014-12-17 2014-12-17 Managing method of liquefied natural gas carrier KR20160073707A (en)

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KR1020140182337A KR20160073707A (en) 2014-12-17 2014-12-17 Managing method of liquefied natural gas carrier

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190036221A (en) * 2017-09-27 2019-04-04 울산대학교 산학협력단 Managing method of LNG ship
KR20190063920A (en) * 2017-11-30 2019-06-10 삼성중공업 주식회사 Operating method of liquefied gas carrier

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120027790A1 (en) 1998-08-07 2012-02-02 University Of Washington Immunological herpes simplex virus antigens and methods for use thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120027790A1 (en) 1998-08-07 2012-02-02 University Of Washington Immunological herpes simplex virus antigens and methods for use thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190036221A (en) * 2017-09-27 2019-04-04 울산대학교 산학협력단 Managing method of LNG ship
KR20190063920A (en) * 2017-11-30 2019-06-10 삼성중공업 주식회사 Operating method of liquefied gas carrier

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