KR20140075285A - Liqueifed gas drip discharging apparatus - Google Patents

Abstract

The present invention relates to an apparatus for discharging liquefied gas drips, and more particularly, to an apparatus for discharging liquefied gas drips which is provided to discharge liquefied gas leaking from a liquefied gas storage tank in which liquefied gas of extremely low temperature, such as liquefied natural gas, is stored to the outside. The apparatus for discharging liquefied gas drips according to an embodiment of the present invention which is supplied to a liquefied gas storage tank having a storing space for storing liquefied gas and an upper dome formed at the upper part of the storing space comprises: a drip tray provided to collect liquefied gas leaking from the upper dome; and a drain part linked to one side of the drip tray to discharge liquefied gas collected in the drip tray to the outside of the storage tank.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid dispensing apparatus,

The present invention relates to a liquefied gas leakage liquid discharging apparatus, and more particularly, to a liquefied gas leakage liquid discharging apparatus for discharging a liquefied gas leaked from a liquefied gas storage tank in which cryogenic liquefied gas such as liquefied natural gas is stored, To a discharge device.

Generally, the combustible gas includes natural gas (NG) or propane gas, and for convenience of explanation, the natural gas is used for the explanation.

Such flammable gas, for example, natural gas, is transported in a gasified or liquefied gas state via a land or sea gas pipeline, or is transported to a remote destination in a liquefied state.

Most of the natural gas is liquefied in the state of Liquefied Natural Gas (LNG) and stored in the storage tank because the natural gas is liquefied upon cooling at a very low temperature (about -162 ° C) and the volume is reduced to about 1/600. .

Storage tanks may be provided on land, etc., and may also be provided to offshore floating structures such as vessels for transport, storage, storage, etc. of liquefied gases.

For example, in addition to LNG carriers (LNG Container: LNGC) for transporting LNG, floating structures such as Floating, Production, Storage and Offloading, FSRU and RV (Regasification Vessel) And a storage tank for storing the gas.

Referring to FIG. 1, a storage tank 10 provided in a hull of a floating structure 1 in general is provided in a double insulation structure so as to store cryogenic liquefied gas, And includes an inner shell 12 in which gas is stored and an outer shell 14 provided in the outer shell.

An upper dome 20 and an upper dome 20 extending to the upper portion of the hull for supplying or discharging the liquefied gas and repairing the inside of the storage tank 10 are provided in the upper portion of the storage tank 10, A dome cover 22 is provided.

Meanwhile, the liquefied gas stored in the storage tank 10 may leak to the vicinity of the upper dome 20 by the process of opening and closing the dome cover 22 of the upper dome 20, or by a decrease in sealing force or a leak .

The LNG leaking to the periphery of the upper dome 20 is in a state of being liquefied at a very low temperature. When such a liquefied gas comes into contact with the surface of the storage tank 10 or the hull, it may increase brittleness due to cryogenic temperature, .

On the other hand, the upper deck 30 of the floating structure 1 is provided with a passageway for moving the operator or the logistics, various facilities 32, a module support structure for supporting the various facilities 32, Cables and pipelines 34 may be installed and the surfaces are coated to protect these facilities from the leakage of LNG.

However, despite such coatings, cryogenic liquefied gases can cause significant impact losses on the upper deck 30 and various facilities upon leakage.

Disclosure of Invention Technical Problem [10] The present invention is directed to solve the above-mentioned problems, and it is an object of the present invention to prevent the cryogenic liquefied gas leaking to the vicinity of the upper dome of the storage tank from reaching the upper deck or other facilities, A liquid leakage prevention device for preventing leakage of the liquid gas is provided.

According to an aspect of the present invention, there is provided an apparatus for discharging a liquefied gas, comprising: a storage space for storing a liquefied gas; and a liquefied gas storage tank provided in a liquefied gas storage tank provided with an upper dome above the storage space, A drip tray provided to collect liquefied gas leaked from the dome; And a drain portion connected to one side of the drip tray and provided to discharge the liquefied gas collected in the drip tray to the outside of the storage tank.

In the apparatus for discharging a liquefied gas leakage liquid according to an embodiment of the present invention, the drain portion includes a first pipe connected to the drip tray and extending to an outer portion of the storage tank, and a second pipe extending from the first pipe, And a second pipe connected to the inner pipe and extending to the lower side of the storage tank and having an outlet facing the outside of the storage tank.

In the apparatus for discharging a liquefied gas leakage liquid according to an embodiment of the present invention, the drain portion includes a first pipe connected to the drip tray and extending to an outer portion of the storage tank, and a second pipe connected to the first pipe, And a second piping extending so that an outlet is directed to the outside of the storage tank.

The apparatus for discharging a liquefied gas leakage liquid according to an embodiment of the present invention may further include an outer wall portion extending upward from an outer portion of the storage tank to partition a peripheral region of the upper dome.

The exhaust pipe may include an exhaust pipe provided at an upper portion of the second pipe to exhaust the vaporized liquefied gas in the liquefied gas leakage liquid discharging apparatus according to an embodiment of the present invention.

In the apparatus for discharging a liquefied gas leakage liquid according to an embodiment of the present invention, the exhaust pipe may extend upward and be bent so that the outlet faces downward.

A bottom plate for collecting the liquefied gas leaking around the upper dome, the bottom plate being provided with a penetrating portion inserted into the upper dome in the liquefied gas leakage liquid discharging apparatus according to an embodiment of the present invention, And may include an inner side wall and an outer side wall that block the overflow of the liquefied gas.

In the apparatus for discharging a liquefied gas leakage liquid according to an embodiment of the present invention, the bottom plate may be provided so as to be inclined downward toward a portion to which the drain portion is connected.

The apparatus may further include a storage unit for storing the liquefied gas discharged from the drain unit in the liquefied gas leakage liquid discharge apparatus according to an embodiment of the present invention.

By using the present invention, the cryogenic liquefied gas leaking from the upper dome is discharged to the outside without touching the deck or other facilities, thereby preventing the cryogenic liquefied gas from increasing the brittleness due to contact with the deck or other facilities, So that the stability and durability of the storage tank can be improved.

1 is a plan view of a typical liquefied gas storage tank;
2 is a side cross-sectional view of a typical liquefied gas storage tank.
3 is a plan view showing a liquefied gas storage tank having a liquefied gas leakage liquid discharge device according to an embodiment of the present invention;
4 is a side cross-sectional view illustrating a liquefied gas storage tank having an apparatus for discharging a liquefied gas leakage liquid according to an embodiment of the present invention;
FIG. 5 is a perspective view of a liquefied gas leakage liquid discharging apparatus according to an embodiment of the present invention, partially cut away. FIG.
6 is an enlarged cross-sectional view of a device for discharging a liquefied gas leakage liquid according to an embodiment of the present invention.
7 is a side cross-sectional view illustrating a liquefied gas storage tank having a liquefied gas leakage liquid discharge apparatus according to another embodiment of the present invention.
FIG. 8 is a plan view showing a liquefied gas storage tank provided with a liquefied gas leakage liquid discharge apparatus according to another embodiment of the present invention. FIG.
9 is a side cross-sectional view illustrating a liquefied gas storage tank having a liquefied gas leakage liquid discharge apparatus according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The same or similar components appearing in the drawings of the respective embodiments within the same or similar concept will be described using the same or similar reference numerals.

FIG. 3 is a plan view showing a liquefied gas storage tank provided with a liquefied gas leakage liquid discharging device according to an embodiment of the present invention, and FIG. 4 is a sectional view of the liquefied gas leakage liquid discharging device according to an embodiment of the present invention Sectional view showing the liquefied gas storage tank. FIG. 5 is a perspective view showing a part of the liquefied gas leakage liquid discharging apparatus according to an embodiment of the present invention, and FIG. 6 is an enlarged view of the apparatus for discharging a liquefied gas leakage liquid according to an embodiment of the present invention. Sectional view.

3 to 6, the liquefied gas leakage liquid discharging apparatus 150 according to an embodiment of the present invention can be provided to discharge the liquefied gas leaked from the storage tank 110 in which the liquefied gas is stored .

In this embodiment, the storage tank 110 may be provided in a floating structure 100, such as a land or a ship, and may include a storage space for storing cryogenic liquefied gas and a heat insulating structure for insulating the storage space from the outside .

The cryogenic liquefied gas is obtained by condensing and liquefying natural gas (NG) or propane gas by cryogenically cooling it at a cryogenic temperature. In addition to natural gas or propane gas, various gases are liquefied.

For example, natural gas is liquefied upon cooling at cryogenic temperatures (approximately -162 ° C), and its volume is reduced to about 1/600, so most natural gas is stored in the storage tank (LNG) in the form of Liquefied Natural Gas 110).

The floating structure 100 having the storage tank 110 for storing the liquefied gas may include an LNG container (LNG Container: LNGC) for transporting LNG, a Floating, Production, Storage and Offloading (FPSO) and Regasification Unit), and RV (Regasification Vessel).

As described above, the storage tank 110 provided in the hull of the floating structure 100 is provided with a double insulation structure for cryogenic LNG storage. In this structure, an inner cell shell 112 and an outer shell 114 provided on the outer side thereof.

An upper dome 120 and an upper dome 120 extended to the upper portion of the hull for opening and closing the upper dome 120 are provided in the upper portion of the storage tank 110 for supplying and discharging LNG and repairing the inside of the storage tank 110, A dome cover 122 may be provided. A pump tower or the like for unloading the liquefied gas stored in the storage tank 110 may be installed in the upper dome 120.

Meanwhile, the upper dome 120 is surrounded by the upper dome 120 by unloading the liquefied gas and opening or closing the dome cover 122 of the upper dome 120, or by a decrease in sealing power or leakage, .

The upper deck 130 of the floating structure 100 is provided with a passageway for moving the operator or the logistics or various facilities 132 and a module support structure for supporting the same, And a pipeline 134 may be installed on the deck 130. A coating may be provided on the deck 130 to protect such facilities from leakage of LNG.

The cryogenic liquefied gas leaking to the vicinity of the upper dome 120 can be discharged to the outside of the storage tank 110 by the liquefied gas leakage liquid discharging device 150, It is possible to prevent the facility from cooling brittleness caused by the liquefied gas at a very low temperature and the damage caused thereby.

In this embodiment, the liquefied gas leakage liquid discharge device 150 may include a drip tray 152 provided to collect the liquefied gas leaked from the upper dome 120.

The drip tray 152 may be provided around the upper dome 120 to prevent the liquefied gas leaking to the periphery of the upper dome 120 from falling on the deck 130 or the like.

The drip tray 152 may include a bottom plate 154 provided with a penetration portion inserted into the upper dome 120 at the center so as to be mounted around the upper dome 120. The bottom plate 154 is provided to receive liquefied gas that leaks around the upper dome 120 and may be provided to collect the leaked liquefied gas as such.

Further, the inner partition wall 156 and the outer partition wall 158 extending upward can be provided on the inner circumferential surface and the outer circumference of the penetrating portion of the bottom plate 154. The inner bulkhead 156 and the outer bulkhead 158 can block leaking liquefied gas from flooding around the bottom plate 154 and form a passage through which the leaked liquefied gas flows with the bottom plate 154 .

A drain 160 for discharging the liquefied gas collected in the drip tray 152 to the outside of the storage tank 110 may be provided at one side of the drip tray 152.

Here, the drain portion 160 may include a first pipe 162 having one end connected to the drip tray 152. The other end of the first pipe 162 may extend to an outer portion of the storage tank 110.

An inner pipe 164 extending through the storage tank 110 and extending to the outside of the storage tank 110 may be connected to the other end of the first pipe 162.

In addition, the inner pipe 164 may be provided with a second pipe 166 extending to the lower side of the storage tank 110. In this embodiment, the storage tank 110 may be provided to the floating structure 100 and the second pipe 166 may be formed such that the outlet 166a is directed to the outside of the storage tank 110, have.

In this embodiment, the liquefied gas leakage liquid discharging device 150 discharges the leaked liquefied gas to the ocean, but the present invention is not limited thereto and can be variously modified.

Further, an exhaust pipe 168 may be provided at one side of the upper portion of the second pipe 166.

The exhaust pipe 168 is exhausted to the second pipe 166 or stored in the storage unit 170 so as to discharge the gas collected in the upper portion of the second pipe 166, that is, the vaporized liquefied gas, to the outside So that it is possible to prevent an accident such as an explosion by the gas collected on the upper portion of the second pipe 166, that is, by the vaporized liquefied gas.

In the present embodiment, the exhaust pipe 168 may be provided in a shape extending upward from one side of the upper portion of the second pipe 166, preferably extending upward, and bending such that the outlet is directed downward, It is possible to prevent foreign matter or rain or the like from being introduced.

7 is a side cross-sectional view illustrating a liquefied gas storage tank having a liquefied gas leakage liquid discharge apparatus according to another embodiment of the present invention.

7, the liquefied gas leakage liquid discharging device 150 may further include a storage unit 170 for storing the liquefied gas discharged from the outlet of the second pipe 166. In this case, In addition, the liquefied gas stored in the storage unit 170 may be recovered to a separate processing facility.

In addition, in the present embodiment, the liquefied gas leakage liquid discharging device 150 can prevent the environmental pollution problem due to the dumping of the liquefied gas discharged through the drain portion 160, etc.

Also, in the present embodiment, the storage tank 110 may be provided with an outer wall portion 180 that blocks leaked liquefied gas and the like from flowing out.

The outer wall portion 180 may be provided to extend upward from the outer portion of the storage tank 110 and may define a peripheral region of the upper dome 120. Accordingly, even if the liquefied gas leaks to the area around the upper dome 120, the liquefied gas does not overflow to the outside of the outer wall part 180, thereby preventing damage to surrounding facilities.

Although the shape of the drip tray 152 is not particularly limited in the present embodiment, the drain portion 160, that is, the first piping 152, may be formed in the drain pipe 160 so that the liquefied gas collected by the bottom plate 154 can be easily collected by the drain portion 160. [ It is preferable to provide a downward inclination toward the connected portion. In addition, the bottom plate 154 is generally inclined outwardly, so that the liquefied gas collected on the bottom plate 154 can be more easily discharged to the drain portion 160.

In addition, in the present embodiment, the configuration of the liquefied gas leakage liquid discharge device 150 is not limited and can be modified into various forms.

FIG. 8 is a plan view showing a liquefied gas storage tank provided with a liquefied gas leakage liquid discharging apparatus according to another embodiment of the present invention, and FIG. 9 is a perspective view illustrating a liquefied gas leakage liquid discharging apparatus according to another embodiment of the present invention Sectional view showing a liquefied gas storage tank provided therein.

7 and 8, the drainage unit 160 does not penetrate the interior of the storage tank 110 but is directly connected to the outside of the storage tank 110 As shown in FIG.

The drain portion 260 of the liquefied gas leakage liquid discharging device 250 may include a first pipe 262 having one end connected to the drip tray 252 and the other end of the first pipe 262 And may extend outwardly of the storage tank 110.

The drip tray 252 may include a bottom plate 254 and inner and outer side walls 256 and 258 provided on the inner and outer peripheries of the bottom plate 254, respectively.

In addition, the first pipe 262 may be connected to a second pipe 266 extending to the lower side of the storage tank 110. Further, the outlet 266a of the second pipe 266 may be formed to face outward, and may be connected to a separate storage unit (170 shown in FIG. 7).

Therefore, the liquefied gas leakage liquid discharging device 250 of the present embodiment can prevent the liquefied gas leaking around the upper dome 120 from passing through the internal piping (164 shown in Figs. 3 and 4) inside the storage tank 110 , And can be discharged directly to the outside.

In addition, an exhaust pipe 268 for discharging the vaporized liquefied gas to the outside may be provided at one side of the upper portion of the second pipe 266 during the discharge of the leaked liquefied gas.

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 exemplary embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Therefore, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, I will say.

100: floating structure 110: storage tank
112: inner cell 114: outer cell
120: upper dome 122: dome cover
130: Deck 132: Facility
134: Pipeline 150: Liquefied gas leakage liquid discharge device
152: drip tray 154: bottom plate
156: inner side wall 158: outer side wall
160: drain part 162: first piping
164: internal piping 166: second piping
168: Exhaust pipe

Claims (9)

A liquefied gas leakage liquid discharge apparatus provided in a storage space where liquefied gas is stored and a liquefied gas storage tank provided with an upper dome above the storage space,
A drip tray provided to collect liquefied gas leaking from the upper dome; And
A drain portion connected to one side of the drip tray and provided to discharge the liquefied gas collected in the drip tray to the outside of the storage tank;
And an outlet port for discharging the liquefied gas.
The semiconductor device according to claim 1, wherein the drain portion
A first pipe connected to the drip tray and extending to an outer portion of the storage tank,
An inner pipe connected to the first pipe and extending outwardly through the storage tank,
And a second pipe connected to the internal pipe and extending to the lower side of the storage tank and having an outlet facing the outside of the storage tank.
The semiconductor device according to claim 1, wherein the drain portion
A first pipe connected to the drip tray and extending to an outer portion of the storage tank,
And a second pipe connected to the first pipe and extending to the lower side of the storage tank and having an outlet facing the outside of the storage tank.
The method according to claim 1,
Further comprising an outer wall portion extending upward from an outer portion of the storage tank to define a peripheral region of the upper dome.
5. The method according to any one of claims 2 to 4,
And an exhaust pipe provided at an upper side of the second pipe to exhaust the vaporized liquefied gas.
6. The method of claim 5,
Wherein the exhaust pipe extends upward and is curved so that an outlet faces downward.
5. The method according to any one of claims 1 to 4,
A bottom plate provided with a penetrating portion to be inserted into the upper dome and collecting liquefied gas leaking around the upper dome,
And an inner side wall and an outer side wall extending upwardly from the inside and outside of the bottom plate to block overflow of the liquefied gas.
8. The apparatus of claim 7, wherein the bottom plate
Wherein the drain portion is provided with a downward inclination toward the connected portion.
5. The method according to any one of claims 1 to 4,
And a storage section for storing the liquefied gas discharged from the drain section.

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