KR20160148309A - Collecting apparatus of leakage for liquid gas storage tank and marine structure including the same - Google Patents

Collecting apparatus of leakage for liquid gas storage tank and marine structure including the same Download PDF

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Publication number
KR20160148309A
KR20160148309A KR1020150085164A KR20150085164A KR20160148309A KR 20160148309 A KR20160148309 A KR 20160148309A KR 1020150085164 A KR1020150085164 A KR 1020150085164A KR 20150085164 A KR20150085164 A KR 20150085164A KR 20160148309 A KR20160148309 A KR 20160148309A
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South Korea
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collecting
storage tank
leakage
collecting container
liquid
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KR1020150085164A
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Korean (ko)
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류채화
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현대중공업 주식회사
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Priority to KR1020150085164A priority Critical patent/KR20160148309A/en
Publication of KR20160148309A publication Critical patent/KR20160148309A/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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/22—Safety features
    • B65D90/24—Spillage-retaining means, e.g. recovery ponds
    • 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

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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

The present invention relates to an apparatus for collecting a leaked liquid in a liquefied gas storage tank and an offshore structure having the same. The leakage collection apparatus of the present invention comprises: a first collection container installed on a surface of a heat insulating panel of a storage tank to collect leakage liquid; And a sensing unit installed inside the first collecting container to sense leakage.
The leakage collection device of the liquefied gas storage tank and the marine structure having the same according to the present invention can be constructed such that the first collection container is hermetically installed in the insulation panel of the storage tank in which the discharge port is formed, It is possible to improve the collection efficiency of the leakage liquid without installing the first collecting vessel and also by installing the first collecting vessel on the heat insulating panel of the storage tank and installing the second collecting vessel on the bottom of the hull below the first collecting vessel, So that the leakage liquid can be more effectively and safely managed and the first collecting container is formed in a hermetic manner so that the leakage liquid does not fall to the bottom of the hull even if the hull is excessively shaken, It is possible to reduce the size as much as the free space that is provided for, and satisfy the structure and equipment regulations stipulated by the IGC, Production costs can be saved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a leaking solution collecting device for a liquefied gas storage tank, and a marine structure having the same.

The present invention relates to an apparatus for collecting leakage liquid in a liquefied gas storage tank and a marine structure having the same.

Natural gas is a fossil fuel containing methane as a main component and a small amount of ethane, propane, and the like, and has recently been regarded as a low-pollution energy source in various technical fields.

Natural gas is transported in a gaseous state through land or sea gas pipelines, or is transported to a remote location where it is stored in an LNG carrier in the form of liquefied natural gas (LNG). Liquefied natural gas is obtained by cooling natural gas at a cryogenic temperature (below about -163 ° C), and its volume is reduced to about 1/600 of that of natural gas, making it well suited for long-distance transport through the sea.

Liquefied natural gas carriers are equipped with storage tanks (also known as 'cargo holds') that can store and store liquefied natural gas that is liquefied by cooling natural gas. Since the boiling point of liquefied natural gas is about -162 ° C at atmospheric pressure, the storage tank for liquefied natural gas is a material that can withstand extremely low temperatures such as aluminum, stainless steel and 35% nickel steel to safely store and store liquefied natural gas. And is designed to have a structure resistant to thermal stress and heat shrinkage and to prevent heat penetration.

LNG RV (Regasification Vessel), which transports LNG carriers and LNG for unloading LNG to land customers by landing LNG and landing on land, reclaiming stored LNG after arriving at land demand and unloading it into natural gas, Includes floating storage facilities such as LNG FPSO (Floating, Production, Storage and Offloading) and LNG FSRU (Floating Storage and Regulation Unit) storage tanks installed in LNG carriers or LNG RVs.

LNG FPSO is a marine floating facility that is used to directly liquefy the produced natural gas from the sea and store it in a storage tank and, if necessary, to transfer the LNG stored in this storage tank to an LNG carrier. In addition, the LNG FSRU is a marine floating facility that stores LNG unloaded from LNG transit offshore and stores it in a storage tank and then supplies the LNG to the demanding customers when necessary.

In this way, a storage tank for storing LNG in a cryogenic condition is installed in an offshore structure such as an LNG carrier, LNG RV, LNG FPSO, and LNG FSRU for transporting or storing liquid cargo such as LNG.

Such a storage tank can be classified into an independent tank type and a membrane type depending on whether the load of the cargo directly acts on the heat insulating material. Normally, membrane type storage tanks are divided into NO 96 type and Mark III type, and independent tank type storage tanks are divided into MOSS type and IHI-SPB type.

In general, a conventional independent storage tank is made by attaching a relatively hard insulating panel such as polyurethane to a tank body made of an alloy such as aluminum alloy, SUS and 9% nickel, which is resistant to low temperatures, and a plurality Lt; / RTI >

In such a self-contained storage tank, if the tank body is damaged and leakage occurs, the leaking low-temperature liquefied gas may damage the hull by contacting the hull. In order to prevent this, a lower portion of a conventional independent storage tank is provided with a discharge port for discharging the leaked liquid upon leakage of the liquefied gas and a partial secondary barrier for collecting the liquefied gas falling therefrom, The device is installed.

The conventional leakage liquid collecting device comprises a collecting container (also referred to as a drip tray or drip pan) for containing the leakage liquid of the liquefied gas and a support for supporting the collecting container on the bottom of the hull of an offshore structure, And a hull protection layer provided on the bottom of the hull to prevent leakage of the leaking liquid to the outside of the collection vessel or to prevent the leaking liquid contained in the collection vessel from overflowing causing a thermal deformation or brittleness of the bottom of the hull.

When the hull protection layer is installed, the hull protection layer is required to be installed all over the bottom of the hull as well as in the case of drying and maintenance of the offshore structure. Therefore, the drying cost of the offshore structure is increased due to the increase of material cost and labor cost There is a problem that it takes a lot of drying time.

In addition, the conventional leakage liquid collecting device designs the size of the collecting container by estimating the leakage amount for 15 days according to the IGC code (International Code for the Construction and Equipment of Shipbuilding Liquefied Gases in Bulk) Therefore, it is difficult to predict the amount of leakage, and because the collection device is conservatively designed considering the safety factor for the predicted leakage amount, the size of the collecting device is large and the stored liquid amount It was necessary to take steps to prevent flooding.

Korean Patent Publication No. 10-2010-0106741 (Published on October 04, 2010) Korean Patent Publication No. 10-2014-0033894 (published on March 19, 2014)

It is an object of the present invention to provide a first collecting container on a heat insulating panel of a storage tank so as to prevent leakage from the storage tank regardless of the direction of inclination of the ship. And to provide an apparatus for collecting leakage liquid of a liquefied gas storage tank and an offshore structure having the same, capable of safely collecting liquefied gas.

It is another object of the present invention to provide an apparatus for collecting a leaked liquid in a liquefied gas storage tank and an apparatus for collecting the collected liquid in a liquefied gas storage tank, And to provide an offshore structure.

It is also an object of the present invention to provide a first collecting container on a heat insulating panel of a storage tank and a second collecting container on the bottom of the first collecting container so that the leakage can be more effectively and safely collected and managed And to provide an apparatus for collecting leakage liquid of a liquefied gas storage tank and an offshore structure having the same.

It is another object of the present invention to provide an apparatus for collecting leakage liquid of a liquefied gas storage tank and an offshore structure having the same, which can satisfy the structure and equipment rules prescribed by IGC even if the size of the collection container is reduced.

An apparatus for collecting leaking liquid in a liquefied gas storage tank according to an aspect of the present invention includes: a first collection container installed on a surface of a heat insulating panel of a storage tank to collect leakage liquid; And a sensing unit installed inside the first collecting container to sense leakage.

Specifically, the first collecting container may include a discharge port communicating with a gap between the tank body of the storage tank and the heat insulating panel to discharge the leakage liquid, and an upper rim may be a closed type Lt; / RTI >

Specifically, the sensing unit may be a temperature sensor.

Specifically, the first collecting container may further include a rupture disk installed at the discharge port communicating with the gap in the first collecting container.

In particular, the apparatus may further include a second collection container installed between the tank body of the storage tank and the hull bottom of the offshore structure.

Specifically, the second collecting vessel may be supported by a plurality of supports provided on the bottom of the hull of the offshore structure.

Specifically, a drain line may be provided between the first collecting container and the second collecting container.

Specifically, the drain line has one end connected to the inside of the first collecting container and the other end extending to the inside of the second collecting container, and the leakage liquid collected in the first collecting container is discharged to the second Collecting container.

Specifically, one end of the drain line is connected to an upper portion of a side surface of the first collecting container so that the leakage liquid filled in the first collecting container is discharged to the second collecting container when the leakage liquid reaches a certain water level, The other end of the drain line may be located below the top of the second collection vessel so that the leakage liquid guided through the interior of the drain line can be collected inside the second collection vessel.

An offshore structure according to one aspect of the present invention is characterized in that it includes an apparatus for collecting a liquid for leakage of the liquefied gas storage tank described above.

The leakage collection device of the liquefied gas storage tank and the marine structure having the same according to the present invention can be constructed such that the first collection container is hermetically installed in the insulation panel of the storage tank in which the discharge port is formed, The leakage liquid leaking from the storage tank can be directly dropped into the first collection container, and the collection efficiency of the leakage liquid can be improved.

In addition, the apparatus for collecting leaking liquid in the liquefied gas storage tank according to the present invention and the marine structure having the leaking solution collecting tank according to the present invention can prevent the leaking liquid collected in the first collecting vessel from falling to the bottom of the hull It is possible to stably protect the hull.

The apparatus for collecting leaking liquid in a liquefied gas storage tank according to the present invention and an offshore structure having the same are provided with a first collecting vessel on a heat insulating panel of a storage tank and a second collecting vessel on the bottom of a hull below the first collecting vessel As a result, the partial secondary barrier is formed in a double shape, so that the leakage liquid can be more effectively and safely managed.

The apparatus for collecting leaking liquid in the liquefied gas storage tank according to the present invention and the marine structure having the leaking solution collecting tank according to the present invention can be manufactured by forming the first collecting container in a hermetic manner so that the leaking liquid does not fall to the bottom of the hull even if the hull is shaken excessively, It is possible to reduce the size as much as the free space provided to prevent overflow, thereby satisfying the IGC-specified structure and equipment rules, and reducing the material cost and production cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of an apparatus for collecting leakage liquid in a liquefied gas storage tank according to a first embodiment of the present invention; FIG.
2 is a configuration diagram of an apparatus for collecting leakage liquid in a liquefied gas storage tank according to a second embodiment of the present invention.
FIG. 3 is a configuration diagram of an apparatus for collecting leakage liquid in a liquefied gas storage tank according to a third embodiment of the present invention.
4 is a configuration diagram of an apparatus for collecting leakage liquid in a liquefied gas storage tank according to a fourth embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

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

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of an apparatus for collecting leakage liquid in a liquefied gas storage tank according to a first embodiment of the present invention; FIG.

As shown in FIG. 1, an apparatus 100 for collecting leaking liquid in a liquefied gas storage tank according to the first embodiment of the present invention includes a first collecting container 110 and a sensing unit 120.

The liquefied gas storage tank may be a stand-alone liquefied gas storage tank used in an offshore structure, and the insulation panel 20 is attached to the outside of the tank body 10.

The heat insulating panel 20 can be formed by using a relatively hard heat insulating material such as a polyurethane foam, by making a plurality of unit panels, and then attaching to the tank body 10.

At this time, the tank body 10 and the heat insulating panel 20 are not completely in close contact with each other, but are spaced from each other to form a gap 30. [

This gap 30 can be utilized as a flow passage for the liquefied gas that leaks from the liquefied gas storage tank and can be used as a discharge port for communicating with the gap 30 so as to discharge the liquefied gas leakage liquid flowing through the gap 30. [ 40 may be formed.

The discharge port 40 may be formed between one heat insulating panel 20 and another adjacent heat insulating panel 20 and may be formed through the heat insulating panel 20.

When the liquefied gas leaks from the storage tank, the leakage liquid flows down through the gap 30 and flows through the discharge port 40 formed in the heat insulating panel 20, including the first collecting container 110 and the sensing unit 120 Can be collected in the leakage liquid collecting apparatus (100).

The first collection container 110 may be installed to surround the discharge port 40 on the lower surface of the heat insulating panel 20 on which the discharge port 40 is formed and may include a sensing unit 120 . The first collection vessel 110 may serve as a partial secondary barrier to protect the hull when liquefied gas is leaked from the liquefied gas storage tank.

The first collecting container 110 may be a container having various shapes such as a dish shape or a square box shape in which the upper part is opened so as to collect and store the liquid gas leakage liquid flowing through the discharge port 40.

The first collecting vessel 110 may also be installed in a hermetically sealed manner in which the upper rim is sealed by the lower surface of the insulating panel 20 so as to prevent the collected leaking liquid from falling to the hull bottom 50 .

Accordingly, in this embodiment, since the first collecting container 110 is installed in a shape to enclose the discharge port 40, the leakage liquid can be directly introduced into the first collecting container 110 regardless of the tilting direction of the hull, In order to prevent this, it is not necessary to install a member such as a pipe extending from the discharge port to the collecting container in the existing leak collecting device, and the material cost and the production cost can be reduced by installing the member.

In addition, since the first collecting container 110 of the present embodiment is of a closed type, even if the ship hits excessively, the leakage liquid does not fall over to the bottom 50 of the hull, It is not necessary to install the hull protection layer on the hull below the collection container, thereby reducing the material cost and production cost, and further, it is possible to save the drying cost and the drying time of the offshore structure.

Particularly, since the first collecting container 110 of the present embodiment is installed in a hermetically sealed manner, it is possible to satisfy the structure and equipment rules defined by the IGC while reducing the size. Specifically, the conventional collecting container is provided with a clearance space such that the height of the collected collecting container is increased and the total size thereof is enlarged to prevent the leakage liquid collected when the hull is severely shaken while satisfying the IGC regulations. However, Since the collecting container 110 does not flood out regardless of the shaking of the hull, the size of the collecting container 110 can be reduced as much as the space available for the conventional collecting container.

The sensing unit 120 can be installed inside the first collecting container 110 and can detect whether or not the liquefied gas leaks from the storage tank.

The sensing unit 120 may be a temperature sensor, and allows for the maintenance of the storage tank, such as when the leakage of liquefied gas is detected, to be post-cured.

2 is a configuration diagram of an apparatus for collecting leakage liquid in a liquefied gas storage tank according to a second embodiment of the present invention.

The tank body 10, the heat insulating panel 20, the gap 30, the discharge port 40 and the hull bottom 50 shown in Fig. 2 are used for the first embodiment of the present invention, In order to explain the embodiment, the same reference numerals are used for the same components as those shown in FIG. 1, and therefore, detailed descriptions of the same components will be omitted herein to avoid redundancy.

2, the apparatus 200 for collecting leaking liquid in the liquefied gas storage tank according to the second embodiment of the present invention includes a first collection vessel 210, a sensing unit 220, a rupture disk 230, . The second collection vessel 210 can serve as a partial secondary barrier for protecting the hull when liquefied gas is leaked from the liquefied gas storage tank.

In the second embodiment of the present invention, the first collecting container 210 and the sensing unit 220 are denoted by the same reference numerals as those of the first collecting container 110 and the sensing unit 120 of the first embodiment , The same or similar components. Accordingly, the detailed description of the first collecting container 210 and the sensing unit 220 will be omitted here to avoid duplication of description, and the rupture disk 230, which is a different component from the first embodiment of the present invention, Only the changes that are caused by this will be explained.

The rupture disc 230 can be installed in the discharge port 40 communicating with the gap 30 within the first collecting container 210.

The rupture disk 230 can block the gap 30 and the outside for the purpose of heat insulation and can be ruptured when the liquefied gas leaks from the storage tank and the leakage liquid reaches a certain pressure or more while being leaked to the gap 30 .

FIG. 3 is a configuration diagram of an apparatus for collecting leakage liquid in a liquefied gas storage tank according to a third embodiment of the present invention.

The tank body 10, the heat insulating panel 20, the gap 30, the discharge port 40 and the hull bottom 50 shown in Fig. 3 are used in the first embodiment of the present invention, In order to explain the embodiment, the same reference numerals are used for the same components as those shown in FIG. 1, and therefore, detailed descriptions of the same components will be omitted herein to avoid redundancy.

3, the apparatus 300 for collecting leaking liquid in the liquefied gas storage tank according to the third embodiment of the present invention includes a first collecting container 310, a sensing unit 320, a drain line 330, A second collection container 340, and a support 350. [ The first collecting vessel 310 and the second collecting vessel 340 can serve as a partial secondary barrier for protecting the hull when liquefied gas is leaked from the liquefied gas storage tank.

In the third embodiment of the present invention, the first collecting container 310 and the sensing unit 320 are denoted by the same reference numerals as those of the first collecting container 110 and the sensing unit 120 of the first embodiment , The same or similar components. Therefore, the detailed description of the first collecting container 310 and the sensing unit 320 will be omitted herein to avoid duplication of description, and the drain line 330, The second collecting container 340, and the support 350 will be described.

The drain line 330 may be installed between the first collecting container 310 and the second collecting container 340 to be described later and may be formed in the first collecting container 310 by the leakage of the liquefied gas from the storage tank. When the leakage liquid is filled to a certain level, it can serve as a passage for discharging the first collecting container 310 to the second collecting container 340 to be described later.

The drain line 330 may be connected at one end to the interior of the first collection container 310 and at the other end to the interior of the second collection container 340, which will be described later.

One end of the drain line 330 is connected to the first collecting container 340 so that the leakage liquid filled in the first collecting container 310 may be discharged to the second collecting container 340, It may be preferable to be configured to be connected to the upper side surface of the container 310 rather than the lower side surface thereof.

The other end of the drain line 330 is connected to the second collecting vessel 340 so that the leaked liquid guided through the interior of the drain line 330 can be reliably collected inside the second collecting vessel 340. [ And it may be preferable to be located at a central portion rather than near the edge of the second collection container 340.

The second collecting vessel 340 may be installed between the tank body 10 of the storage tank and the hull bottom 50 of the offshore structure and may include a portion 2 And can serve as a car barrier.

The second collecting container 340 may be a container having various shapes such as a dish shape or a square box shape in which the upper part is opened so as to collect and store the leakage liquid flowing through the drain line 330, Collection containers may also be included.

The second collecting container 340 can be installed at any place where the other end of the drain line 330 extends, and the length of the drain line 330 can be reduced to reduce the material cost and the installation cost. It may be desirable to dispose it under the first collecting container 310.

Thus, the present embodiment allows the partial secondary barrier to be double-walled by installing the first collecting container 310 on the heat insulating panel 20 of the storage tank and the second collecting container 340 on the hull bottom 50 In addition to being able to manage the leakage liquid more effectively and safely, the size of each can be further reduced because there are two containers for collecting the leakage liquid.

A plurality of support bodies 350 may be provided on the hull bottom 50 of the offshore structure to allow the second collection vessel 340 to be separated from the hull bottom 50. The second collection vessel 340 and the hull bottom 50 may be formed of a heat-insulating material so as not to transfer heat.

4 is a configuration diagram of an apparatus for collecting leakage liquid in a liquefied gas storage tank according to a fourth embodiment of the present invention.

The tank body 10, the heat insulating panel 20, the gap 30, the discharge port 40, and the hull bottom 50 shown in Fig. 4 are the same as the first embodiment of the present invention, In order to explain the embodiment, the same reference numerals are used for the same components as those shown in FIG. 1, and therefore, detailed descriptions of the same components will be omitted herein to avoid redundancy.

4, an apparatus 400 for collecting leaking liquid in a liquefied gas storage tank according to a fourth embodiment of the present invention includes a first collection vessel 410, a sensing unit 420, a rupture disk 430, A drain line 440, a second collecting container 450, and a support 460. The first collecting vessel 410 and the second collecting vessel 450 can serve as a partial secondary barrier for protecting the hull when liquefied gas is leaked from the liquefied gas storage tank.

In the fourth embodiment of the present invention, the first collecting container 410 and the sensing unit 420 are denoted by the same reference numerals as those of the first collecting container 110 and the sensing unit 120 of the first embodiment And the rupture disk 430 are denoted by the same reference numerals as those of the rupture disk 230 of the second embodiment and the drain line 440, the second collecting container 450, and the support 460 are the same as the rupture disk 230 of the third embodiment, The second collecting vessel 340, the support 350, but may be the same or similar components.

That is, the leakage liquid collecting apparatus 400 according to the fourth embodiment of the present invention can be formed by combining the leakage liquid collecting apparatuses 100, 200, 300 of the first to third embodiments, The detailed description will be omitted here.

As described above, in the present embodiment, the first collecting vessels 110, 210, 310, and 410 are hermetically installed in the heat insulating panel 20 of the storage tank in which the discharge port 40 is formed, The leakage liquid leaking from the storage tank can be directly dropped into the first collecting container 110, 210, 310, and 410, thereby improving the collection efficiency of the leakage liquid.

In this embodiment, the first collecting vessels 110, 210, 310, and 410 are hermetically sealed so that the leakage liquid collected in the first collecting vessels 110, 210, 310, And it is possible to stably protect the hull.

In this embodiment, the first collecting containers 310 and 410 are installed on the heat insulating panel 20 of the storage tank, and the second collecting container 310 and the second collecting container 310 are installed on the hull bottom 50 below the first collecting containers 310 and 410, 340, and 450 are provided, the partial secondary barriers are formed in a double shape, so that the leakage liquid can be more effectively and safely managed.

The present embodiment also shows that the first collecting vessels 110, 210, 310 and 410 are made to be hermetically sealed so that the leakage liquid does not fall to the hull bottom 50 even if the hull is excessively shaken, It is possible to reduce the size as much as the free space that is provided for prevention, and it is possible to satisfy the structure and equipment regulation prescribed by IGC, and to reduce the material cost and production cost.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art that various combinations and modifications may be made without departing from the scope of the present invention. Therefore, it should be understood that the technical contents related to the modifications and applications that can be easily derived from the embodiments of the present invention are included in the present invention.

10: tank body 20: insulating panel
30: Clearance 40: Leakage liquid outlet
50: Hull floor
100, 200, 300, 400: Leakage collector
110, 210, 310, 410: first collecting container 120, 220, 320, 420:
230, 430: rupture disk 330, 440: drain line
340, 450: second collection container 350, 460: support

Claims (10)

A first collection container installed on a surface of the insulating panel of the storage tank to collect the leakage liquid; And
And a sensing unit installed inside the first collecting container to sense leakage of the leaking liquid. 2. The apparatus of claim 1,
Wherein the upper surface of the tank is sealed with a lower surface of the heat insulating panel so as to surround the discharge port communicating with a gap between the tank body of the storage tank and the heat insulating panel to discharge the leakage liquid. Leakage collector. The apparatus of claim 1,
Wherein the temperature sensor is a temperature sensor. 3. The method of claim 2,
Further comprising a rupture disk installed at the outlet communicating with the gap in the first collecting vessel. 3. The method of claim 2,
Further comprising a second collecting vessel installed between the tank body of the storage tank and the bottom of the hull of the offshore structure. 6. The apparatus of claim 5,
Wherein the support structure is supported by a plurality of support members provided on the bottom of the hull of the offshore structure. 6. The method of claim 5,
Further comprising a drain line installed between the first collecting vessel and the second collecting vessel. 8. The method of claim 7,
Wherein one end is connected to the inside of the first collecting container and the other end extends to the inside of the second collecting container so that the leakage liquid collected in the first collecting container discharges to the second collecting container Characterized in that the leakage liquid collecting device of the liquefied gas storage tank. 9. The method of claim 8,
One end of the drain line is connected to an upper portion of a side surface of the first collecting container so that the leakage liquid filled in the first collecting container is discharged to the second collecting container when the leakage liquid reaches a certain water level,
And the other end of the drain line is located below the upper portion of the second collecting vessel so that the leakage liquid guided through the inside of the drain line can be collected inside the second collecting vessel. Leakage collecting device of liquefied gas storage tank. A marine structure comprising a leakage liquid collecting device according to any one of claims 1 to 9.
KR1020150085164A 2015-06-16 2015-06-16 Collecting apparatus of leakage for liquid gas storage tank and marine structure including the same KR20160148309A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
KR101948654B1 (en) * 2018-07-13 2019-05-02 (주)동성화인텍 Storage tank structure
KR20200008430A (en) * 2018-07-16 2020-01-28 한국조선해양 주식회사 collecting apparatus of leakage for liquid gas storage tank and ship having the same
CN115123462A (en) * 2022-07-06 2022-09-30 大连船舶重工集团有限公司 Suspension type low-temperature liquid leakage protection device for B-type cabin

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KR20100106741A (en) 2009-03-24 2010-10-04 대우조선해양 주식회사 Body protecting device for independence type liquefied gas storage tank
KR20140033894A (en) 2012-09-11 2014-03-19 대우조선해양 주식회사 Correcting device of leak for independent type cargo tank

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101948654B1 (en) * 2018-07-13 2019-05-02 (주)동성화인텍 Storage tank structure
CN110715167A (en) * 2018-07-13 2020-01-21 东成泛泰克株式会社 Storage tank structure
KR20200008430A (en) * 2018-07-16 2020-01-28 한국조선해양 주식회사 collecting apparatus of leakage for liquid gas storage tank and ship having the same
CN115123462A (en) * 2022-07-06 2022-09-30 大连船舶重工集团有限公司 Suspension type low-temperature liquid leakage protection device for B-type cabin

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