KR20160119343A - Storage tank for liquefied gas, and method for discharging liquefied gas from the same - Google Patents

Storage tank for liquefied gas, and method for discharging liquefied gas from the same Download PDF

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Publication number
KR20160119343A
KR20160119343A KR1020150047320A KR20150047320A KR20160119343A KR 20160119343 A KR20160119343 A KR 20160119343A KR 1020150047320 A KR1020150047320 A KR 1020150047320A KR 20150047320 A KR20150047320 A KR 20150047320A KR 20160119343 A KR20160119343 A KR 20160119343A
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KR
South Korea
Prior art keywords
storage tank
liquefied gas
barrier
vertical support
support portion
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Application number
KR1020150047320A
Other languages
Korean (ko)
Inventor
김민기
Original Assignee
삼성중공업 주식회사
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Priority to KR1020150047320A priority Critical patent/KR20160119343A/en
Publication of KR20160119343A publication Critical patent/KR20160119343A/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 
    • 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
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/001—Thermal insulation specially adapted for cryogenic vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • F17C2270/0107—Wall panels

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

Abstract

Disclosed are a storage tank for liquefied gas and a method for discharging liquefied gas. According to an embodiment of the present invention, a storage tank for liquefied gas comprises: a dent part formed to have a dent shape on a floor of the storage tank; and a collecting unit installed in the dent part to collect liquefied gas, thereby storing and discharging liquefied gas remaining in a storage tank efficiently.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquefied gas storage tank and a liquefied gas discharge method,

The present invention relates to a liquefied gas storage tank and a liquefied gas discharge method.

The liquefied gas storage tank provided in the vessel is made of a material that can withstand cryogenic temperature because it stores liquefied material cooled at cryogenic temperature. It is resistant to thermal stress and heat shrinkage and has an insulation structure that can block heat intrusion. For example, the storage tank may store liquefied natural gas cooled to approximately -163 占 폚. The storage tank is provided with a primary barrier, an upper insulation board, a secondary barrier and a lower insulation board from the inside of the storage tank in an outward direction, and is coupled with an inner hull.

The storage tank is provided with a pump tower for loading and unloading the liquefied gas. The pump tower is connected to the loading device and has a filling pipe for introducing the liquefied gas into the storage tank, a discharge pipe for discharging the liquefied gas inside the storage tank connected to the unloading device, . The pipe of the pump tower is provided in the form of a truss-structured pipe structure.

The pump tower is typically installed close to the aft side bulkhead of the storage tank and is fixed to a liquid dome at the stern side of the top of the storage tank by a base support provided at the bottom of the storage tank .

When the liquefied gas is loaded into the storage tank using a pump tower and then the liquefied gas stored in the storage tank is unloaded from the supply source, the remaining liquefied gas remains in the storage tank at a portion that is difficult to be pumped.

Conventionally, after the liquefied gas is unloaded, the remaining liquefied gas remaining in the storage tank is vaporized and discharged to perform subsequent work on the remaining liquefied gas. This requires a great deal of time and expense for subsequent work, equipment installation and installation, residual liquefied gas vaporization and discharge operations, and the like. In particular, in the case of large storage tanks, it may take a considerable amount of time for residual liquefied gas treatment. As a related patent, refer to Korean Patent Laid-Open No. 10-2012-0126411 (published on November 21, 2012).

Korean Patent Laid-Open No. 10-2012-0126411 (published on November 21, 2012)

An embodiment of the present invention is to provide a liquefied gas storage tank and a liquefied gas discharge method that can effectively store and discharge liquefied gas remaining in a storage tank.

According to an aspect of the present invention, there is provided a storage tank for storing liquefied gas, comprising: a depression formed at a bottom of the storage tank; And a collecting part installed in the depression for collecting the liquefied gas.

The depressed portion may be formed between the pump tower installed through the opening of the liquid dome formed at the stern side of the upper portion of the storage tank and the stern side partition wall.

The depressions may extend from a primary barrier of the storage tank to a lower portion of the inner hull.

The water collecting part is connected to the primary wall of the storage tank and has a first wall part forming a water collecting space where the liquefied gas collects and a second wall part connected to the secondary wall of the storage tank and surrounding the first wall part A bottom support portion connected to the inner hull of the storage tank and installed to surround a lower portion of the second barrier portion; a first heat insulating portion provided between the first and second barrier portions; And a second heat insulating portion provided between the second barrier portion and the bottom supporting portion.

The first barrier part is vertically installed in the form of a pipe and has a first vertical support part formed with a horizontal first protrusion connected to the primary barrier and a second vertical support part fixed from the lower end of the first vertical support part to the inside of the first vertical support part And a first planar bottom portion that is installed in a closed form at a height to form a bottom surface of the first vertical support portion.

The second barrier portion is provided to surround the first vertical support portion and includes a second vertical support portion formed with a horizontal second protrusion connected to the secondary barrier and a second vertical support portion provided at the lower end portion of the first vertical support portion and the second vertical support portion, And a second planar bottom portion supporting the lower end portion and installed in a closed form to form a bottom surface of the second vertical support portion.

The bottom support portion includes a third vertical support portion that is installed to surround the second vertical support portion, a third flat support portion that is installed in a closed form to support the third vertical support portion and forms a bottom surface of the third vertical support portion, Section.

A discharge pump is installed in the water collecting space to discharge the liquefied gas collected in the water collecting space, and the discharge pump is connected to the discharge pipe of the pump tower installed through the opening of the liquid dome formed at the stern side of the upper part of the storage tank So that the liquefied gas in the water collecting space can be pumped and discharged to the outside of the storage tank through the discharge pipe.

The liquid dome may be manufactured to have a size such that the pump tower and the depression are included in the opening of the liquid dome when viewed from a top view.

The primary barrier of the storage tank may be inclined so that the liquefied gas is collected around the depression.

According to another aspect of the present invention, there is provided a method of collecting liquefied gas, the method comprising: (a) collecting liquefied gas present in the storage tank into a collection space of the collection section, such that the bow of the ship is heard above the stern; And (b) operating a discharge pump inserted in the water collecting space to discharge the liquefied gas collected in the water collecting space to the outside of the storage tank.

The step (a) may be performed by moving the ballast water stored in the storage tank located in the bow to the storage tank located at the stern during anchorage of the ship.

In the step (b), the liquefied gas pumped by the discharge pump may be discharged to the outside of the storage tank through a discharge pipe of the pump tower installed in the storage tank.

The liquefied gas storage tank and the liquefied gas discharge method according to the embodiment of the present invention can effectively store and discharge the liquefied gas remaining in the storage tank.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

FIG. 1 and FIG. 2 show the arrangement relationship between a depression, a pump tower, and a partition in a storage tank for storing a liquefied gas according to an embodiment of the present invention.
FIGS. 3 and 4 are respectively a perspective view and a cross-sectional view of the form in which the water collecting part is provided in the depression shown in FIG.
FIG. 5 is a view showing a storage tank in which a primary wall is inclined so that liquefied gas is gathered around a depression according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

1 to 4, a storage tank 1 for storing a liquefied gas includes a pump tower 20 installed through an opening 12 of a liquid dome 10 formed at a stern side of an upper portion of a storage tank 1, A depression 101 formed between the aft side partition wall 1a of the tank 1 and formed in a depressed form at the bottom of the storage tank 1 and a depression 101 provided in the depression 101 to collect the liquefied gas, (100). The storage tank 1 can store various conventional liquefied gases, for example, liquefied natural gas. 1 and 2 show the arrangement relationship between the depression 101 and the pump tower 20 and the partition 1a. In order to facilitate understanding, the depression 101 is shown in a simplified block form. 3 to 5 illustrate a specific shape of the depression 101 and a coupling relationship between the reservoir structure of the reservoir 100 and the reservoir tank 1 provided in the depression 101 with an incision perspective view and a sectional view, respectively. The storage tank 1 according to the embodiment of the present invention can be used for various types of liquefied gas carriers, regasification vessels, container ships, general merchant ships, LNG FPSO (Floating, Production, Storage and Off-loading), LNG FSRU Storage and Regasification Unit) and so on.

Referring to FIGS. 1 and 2, a discharge pump P may be mounted on a pump tower 20 installed through an opening 12 of the liquid dome 10. The discharge pump P pumps the liquefied gas collected in the water collecting space S of the water collecting part 100 (see FIG. 4) to the outside of the storage tank 1 through a discharge pipe (not shown) of the pump tower 20 Can be discharged. For example, the discharge pump P pumps the liquefied gas collected in the collecting space S (see Fig. 4) of the collecting section 100 and supplies the liquefied gas through the discharge pipe (not shown) . To this end, the discharge pump P may be pre-inserted into the collecting space S (see FIG. 4) of the collecting part 100 or may be mounted so as to be able to be lifted or lowered to the pump tower 20. A variety of known conventional techniques such as hydraulic, mechanical, etc. may be used for the elevating method.

Referring to FIG. 2, the liquid dome 10 can be manufactured to have a size such that the pump tower 20 and the depression 101 can be included in the opening 12 of the liquid dome 10 when viewed from a top view . The pump tower 20 according to the embodiment of the present invention can be moved toward the bow in the opening portion 12 as compared with the conventional art.

To be more specific, conventionally, a base support is installed in a storage tank, a thermal barrier work is performed on the storage tank, and then a process of joining the base support and the lower portion of the pump tower is performed. The installation of the pump towers after completion of the insulation barrier work for the storage tanks is done because the pump towers are installed close to the stern bulkheads of the storage tanks and there is no room for the operator to work between the bulkheads and the pump towers. That is, when the pump tower is installed in advance, there is no space to work against the thermal barrier.

Here, the pump tower is provided with a base plate coupled to the base support at the bottom, and the filling pipe, the discharge pipe, and the emergency pipe of the pump tower are fixed to the base plate, and the base plate is coupled to the base support. Such a conventional pump tower installation process is inefficient because simultaneous operation can not be performed because the installation of the pump tower is performed after the thermal barrier work is performed in the storage tank. In addition, considerable work delays may occur in installation of the facilities related to the pump tower, since the design work of the main deck piping, etc. and the operation of the top side structure are performed after the pump tower is installed.

In order to solve this problem, in the embodiment of the present invention, when the size of the opening 12 of the liquid dome 10 is viewed in a plan view, the pump tower 20 and the water collecting part 100 may be included And the pump tower 20 is moved in the opening 12 of the liquid dome 10 so as to move toward the bow. Accordingly, the interval B between the partition wall 1a and the pump tower 20 is widened as compared with the prior art, so that the installation of the pump tower 20 and the operation of the thermal insulation barrier can be performed at the same time, thereby improving the work efficiency.

3 and 4, the aforementioned depression 101 extends from the primary wall 2 of the storage tank 1 to the lower portion of the inner hull 4.

The water collecting part 100 installed in the depression 101 is connected to the primary wall 2 of the storage tank 1 and includes a first wall part 110 forming a water collecting space S in which liquefied gas is collected, A second barrier part 120 connected to the secondary barrier 3 of the storage tank 1 and installed to surround the periphery of the first barrier part 110 and a second barrier part 120 connected to the inner hull of the storage tank 1, A bottom supporting portion 130 installed to surround the lower portion of the second barrier portion 120, a first heat insulating portion 140 provided between the first and second barrier portions 110 and 120, And a second heat insulating part 150 provided between the bottom part 120 and the bottom supporting part 130. The depressed portion 101 and the water collecting portion 100 installed therein increase the storage capacity of the liquefied gas in the storage tank 1 when the liquefied gas is shipped and the space in which the liquefied gas remaining in the storage tank 1 collects when the liquefied gas is unloaded Which facilitates the treatment of residual liquefied gas.

The primary barrier 2 of the storage tank 1 described above is formed to have a high airtightness as a portion directly contacting with the liquefied gas and also has thermal shrinkage when it comes into contact with cryogenic liquefied gas, Plane stiffness can be maintained in order to prevent damage due to the in-plane stiffness. The primary barrier 2 is formed to have a corrugated shape 2a having a corrugated shape and the corrugation 2a is deformed by a certain amount when heat shrinkage occurs to reduce thermal stress at the welded portion. The primary barrier 2 and the secondary barrier 3 may be made of a metal material such as stainless steel or the like.

Between the primary barrier 2 and the secondary barrier 3 is disposed an upper insulation board 5 and between the secondary barrier 3 and the inner hull 4 a lower insulation board 7 is arranged. The upper insulating board 5 and the lower insulating board 7 protect the hull from the fluid at a cryogenic temperature. The upper heat insulating board 5 and the lower heat insulating board 7 may be formed of a protective plate of a plywood material and a heat insulating member of a polyurethane foam (PUF) although not shown in the drawing.

The first barrier part 110 constituting the collecting part 100 includes a first vertical supporting part 111 vertically installed in the form of a pipe and a second vertical supporting part 111 extending from the lower end of the first vertical supporting part 111 to the inside of the first vertical supporting part 111 And a first planar bottom portion 112 formed in a closed form at a predetermined height to form a bottom surface of the first vertical support portion 111. Here, the first vertical supporting part 111 may extend horizontally in the first protrusion 111a connected to the primary wall 2 of the storage tank 1. For example, the primary wall 2 of the storage tank 1 may be connected by a welding method while partially covering the upper end of the peripheral portion of the first projection 111a.

The second barrier part 120 includes a second vertical support part 121 installed to surround the first vertical support part 111 and a second lower support part 121 supporting the lower end part of the first vertical support part 111 and the lower end part of the second vertical support part 121 And a second planar bottom portion 122 installed in a closed form to form a bottom surface of the second vertical support portion 121. Here, the second vertical support 121 may extend horizontally in the second protrusion 121a, which is connected to the secondary barrier 3 of the storage tank 1. For example, the secondary barrier 3 of the storage tank 1 may be connected by a welding method while partially covering the upper end of the peripheral portion of the second projection 121a.

The bottom supporting part 130 includes a third vertical supporting part 131 installed to surround the second vertical supporting part 121 and a third vertical supporting part 131 installed in a closed form to support the lower end of the third vertical supporting part 131, And a third planar bottom 132 forming a bottom surface of the first planar surface 131.

The first to third vertical supports 111, 121 and 131 may be in the form of a circular pipe, and the first to third flat bottoms 112, 122 and 132 may be flat plates. The first to third vertical supports 111, 121 and 131 and the first to third flat bottoms 112, 122 and 132 may be connected to each other by a welding method. As another example, the first barrier part 110, the second barrier part 120, and the bottom support part 130 may be integrally formed.

The first barrier part 110 and the second barrier part 120 may be made of a material corresponding to the primary barrier 2 and the secondary barrier 3, respectively. The first barrier part 110 and the second barrier part 120 may be made of a metal material such as stainless steel, aluminum, brass or zinc. The first heat insulating part 140 and the second heat insulating part 150 may be made of, for example, foam or glass wool.

Hereinafter, a method of discharging the liquefied gas present in the storage tank 1 based on the contents described in Figs. 1 to 4 will be described.

First, the liquefied gas existing in the storage tank 1 is collected into the water collecting space S of the water collecting unit 100 by allowing the bow of the ship to be lifted above the stern. This process can be performed for the residual liquefied gas present in the storage tank 1 after unloading the liquefied gas. And a method of moving the ballast water stored in the storage tank 1 located at the bow to the storage tank 1 located at the stern during berth in the ship.

Next, the discharge pump P inserted in the water collecting space S is operated to discharge the liquefied gas collected in the water collecting space S to the outside of the storage tank 1. The process may be performed by discharging the liquefied gas pumped through the discharge pump P to the outside of the storage tank 1 through the discharge pipe of the pump tower 20. [

5, the primary wall 2 of the storage tank 1 may be inclined at a predetermined angle? Such that the liquefied gas is gathered around the depressed portion 101. In this case, liquefied gas existing in the storage tank 1 collects in the water collecting space S naturally when the liquefied gas is unloaded, without moving the ballast water so that the bow of the ship can be lifted above the stern. The thickness of the primary wall 2 of the storage tank 1 can be made to become finer toward the outer side around the depressed portion 101 in order to form the constant angle? Alternatively, the liquefied gas may be inclined such that the liquefied gas collects around the depressed portion 101 when the inner tank of the storage tank 1 is manufactured.

The foregoing has shown and described specific embodiments. However, it is to be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the scope of the technical idea of the present invention described in the following claims It will be possible.

1: Storage tank 1a: Partition wall
2: primary barrier 3: secondary barrier
4: Internal hull 5, 7: Insulation board
10: Liquid Dome 20: Pump Tower
100: a collecting part 101: a depression part
110: first barrier part 120: second barrier part
130: bottom support

Claims (12)

1. A storage tank for storing liquefied gas,
A depression formed in a bottom of the storage tank; And
And a collecting part installed in the depression for collecting the liquefied gas. The method according to claim 1,
Wherein the depressed portion is formed between a pump tower installed through an opening of a liquid dome formed at a stern side of the upper portion of the storage tank and a stern side partition wall. The method according to claim 1,
Wherein the depression extends from a primary barrier of the storage tank to a lower portion of the inner hull. The method according to claim 1,
The water collecting part
A first barrier part connected to the primary wall of the storage tank and forming a collecting space for collecting the liquefied gas,
A second barrier part connected to the secondary barrier of the storage tank and surrounding the periphery of the first barrier part,
A bottom supporting part connected to the inner hull of the storage tank and installed to surround a lower portion of the second barrier part,
A first heat insulating portion provided between the first barrier portion and the second barrier portion,
And a second heat insulating portion provided between the second barrier portion and the bottom supporting portion. 5. The method of claim 4,
The first barrier part
A first vertical support vertically installed in the form of a pipe and having a horizontal first protrusion connected to the primary barrier,
And a first planar bottom portion which is installed in a closed form at a predetermined height from the lower end of the first vertical support portion to the inside of the first vertical support portion to form a bottom surface of the first vertical support portion. 6. The method of claim 5,
The second barrier portion
A second vertical support portion provided to surround the first vertical support portion and having a horizontal second projection connected to the secondary barrier,
And a second planar bottom portion supporting the lower end portion of the first vertical support portion and the lower end portion of the second vertical support portion and installed in a closed form to form a bottom surface of the second vertical support portion. The method according to claim 6,
The bottom support
A third vertical support portion installed to surround the second vertical support portion,
And a third planar bottom portion provided in a closed form to support the lower end of the third vertical support portion and forming a bottom surface of the third vertical support portion. 5. The method of claim 4,
A discharge pump is installed in the water collecting space to discharge the liquefied gas collected in the water collecting space, and the discharge pump is connected to the discharge pipe of the pump tower installed through the opening of the liquid dome formed at the stern side of the upper part of the storage tank So that the liquefied gas in the collecting space is pumped and discharged to the outside of the storage tank through the discharge pipe. 9. The method of claim 8,
Wherein the liquid dome has a size such that the pump tower and the depression are included in the opening of the liquid dome when viewed from a top view. 10. The method according to any one of claims 1 to 9,
Wherein the primary barrier of the storage tank is inclined so that the liquefied gas is collected around the depressed portion. 10. A method of discharging a liquefied gas present in a storage tank according to any one of claims 1 to 9,
(a) collecting the liquefied gas present in the storage tank into the collecting space of the collecting part such that the bow of the ship is lifted above the stern; And
(b) operating the discharge pump inserted in the water collecting space to discharge the liquefied gas collected in the water collecting space to the outside of the storage tank. 12. The method of claim 11,
Wherein the step (a) comprises moving the ballast water stored in the storage tank located in the bow to the storage tank located at the stern during anchorage of the ship.
KR1020150047320A 2015-04-03 2015-04-03 Storage tank for liquefied gas, and method for discharging liquefied gas from the same KR20160119343A (en)

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WO2019211551A1 (en) 2018-05-02 2019-11-07 Gaztransport Et Technigaz Sealed and thermally insulating tank provided with a loading/unloading tower
FR3083843A1 (en) * 2018-07-16 2020-01-17 Gaztransport Et Technigaz FLUID STORAGE FACILITY
CN112074685A (en) * 2018-05-02 2020-12-11 气体运输技术公司 Tank for storing and/or transporting liquefied gas cargo for ships
CN113874651A (en) * 2019-04-16 2021-12-31 韩国Gas公社 Liquefied gas tank capable of lifting inner shell and lifting method of inner shell of liquefied gas tank
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KR20230018992A (en) * 2021-07-30 2023-02-07 현대중공업 주식회사 Liquefied gas storage tank and vessel comprising the same
FR3130740A1 (en) * 2021-12-22 2023-06-23 Gaztransport Et Technigaz Liquefied gas storage tank.
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