KR101594247B1 - A Maintenance System of Liquid Storage Tank - Google Patents
A Maintenance System of Liquid Storage Tank Download PDFInfo
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- KR101594247B1 KR101594247B1 KR1020140072149A KR20140072149A KR101594247B1 KR 101594247 B1 KR101594247 B1 KR 101594247B1 KR 1020140072149 A KR1020140072149 A KR 1020140072149A KR 20140072149 A KR20140072149 A KR 20140072149A KR 101594247 B1 KR101594247 B1 KR 101594247B1
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- nitrogen
- gap
- storage tank
- liquid storage
- concentration
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Abstract
The present invention relates to a liquid storage tank management system, comprising: a liquid storage tank comprising a gap located between a barrier and an insulating layer; A nitrogen supply line for supplying nitrogen from the nitrogen storage tank to the gap; A gas discharge line for discharging gas from the gap; A sensor provided on the gas discharge line; And a control unit for calculating a concentration of nitrogen through the sensor, wherein the control unit controls the flow rate of nitrogen circulating through the gap.
The liquid storage tank management system according to the present invention maximizes the heat insulation performance of the liquid storage tank and circulates the stored liquid quickly by circulating nitrogen in the gap between the barrier wall of the liquid storage tank and the heat insulating layer, It is possible to prevent damage and destruction of the liquid storage tank and to maximize the reliability of the storage transportation.
Description
The present invention relates to a liquid storage tank management system.
Natural gas is transported in the form of gas through land or sea gas pipelines or liquefied in the form of Liquefied Natural Gas or Liquified Petroleum Gas and stored in LNG transport or LPG transport It is transported to a remote consumer.
Liquefied natural gas is obtained by cooling natural gas at a temperature of minus 163 degrees Celsius, which is the cryogenic temperature, and its volume is reduced to about 1/600 of that of natural gas, making it well suited for long distance transportation through the sea.
LNG carrier for loading liquefied natural gas to land area by carrying liquefied natural gas to sea, and LNG carrier after landing at land demand by carrying LNG to sea, and unloading it as natural gas LNG RV (Liquefied Natural Gas Regasification Vessel) includes a cryogenic storage tank of liquefied natural gas.
Recently, the demand for floating floating structures such as LNG FPSO (Floating, Production, Storage and Offloading) and LNG FSRU (Floating, Storage and Regasification Unit) is gradually increasing, and LNG carrier or LNG RV As shown in Fig.
LNG FPSO is a floating marine structure that is used to directly liquefy natural gas extracted from a gas well and to store it in a storage tank and transfer LNG stored in this storage tank to LNG transport if necessary. In addition, the LNG FSRU is a floating type of floating structure that stores LNG unloaded from LNG carrier at sea, stores it in a storage tank, vaporizes LNG if necessary, and supplies it to the customer demanded on land.
In this way, a storage tank for storing liquefied gas such as LNG is installed in a marine structure such as an LNG carrier, LNG RV, LNG FPSO, and LNG FSRU that transports or stores a liquefied gas such as LNG.
These LNG storage tanks are classified according to their form and function. Depending on the type, there are independent tanks (SPB) and membrane tanks (GTT Mark 3, GTT NO 96). Independent tanks are classified into A, B and C types according to IMO standards.
SPB (Self-support Prismatic shape IMO type-B) tanks of independent tanks are rectangular. The SPB tank was developed by IHI of Japan in 1982 by developing a square (rectangular) tank. The aluminum tanks were placed on the thermal insulation support, and the shape of the tanks was freely designed according to the shape of the hull. It can be manufactured externally and installed on a ship.
In addition, it has a relatively advantage in terms of structural stability compared with the membrane type, and is resistant to sloshing, and the insulation system is exposed to the outside of the tank, which is advantageous in that an operator can easily maintain it.
In the event of leakage of stored stock in such SPB tanks, the properties of the cryogenic reservoir will damage the tank and severely damage the external equipment. Therefore, in recent years, a lot of research and development have been conducted to prevent leakage of the tank.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid storage tank management system for circulating nitrogen between a barrier wall of a liquid storage tank and a heat insulating layer to quickly grasp the leakage of the stored liquid. will be.
A liquid storage tank management system according to an embodiment of the present invention includes: a liquid storage tank including a gap positioned between a barrier and a heat insulating layer; A nitrogen supply line for supplying nitrogen from the nitrogen storage tank to the gap; A gas discharge line for discharging gas from the gap; A sensor provided on the gas discharge line; And a control unit for calculating a concentration of nitrogen through the sensor, wherein the control unit controls the flow rate of nitrogen circulating through the gap.
Specifically, when the concentration of nitrogen is decreased to a predetermined concentration or less, the control unit may supply a larger amount of nitrogen to the gap than the amount of nitrogen supplied when the concentration exceeds the predetermined concentration.
Specifically, a buffer tank for storing the nitrogen; And a vent device for venting the nitrogen.
Specifically, when the pressure of the support space between the liquid storage tank and the inner wall of the hull increases due to the nitrogen discharged from the gap, the nitrogen is stored in the buffer tank, .
Specifically, the apparatus may further include a nitrogen separator provided on the gas discharge line and separating nitrogen from gas discharged from the gap.
Specifically, when the concentration of nitrogen discharged from the gap decreases to a predetermined concentration or less, the control unit may return the separated material from the nitrogen separator to the liquid storage tank.
More specifically, the controller may further include an alarm unit for alerting the operator if the concentration of nitrogen discharged from the gap decreases below a preset concentration.
The liquid storage tank management system according to the present invention maximizes the heat insulation performance of the liquid storage tank and circulates the stored liquid quickly by circulating nitrogen in the gap between the barrier wall of the liquid storage tank and the heat insulating layer, It is possible to prevent damage and destruction of the liquid storage tank and to maximize the reliability of the storage transportation.
1 is a conceptual diagram of a liquid storage tank management system according to an 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 have the same numerical numbers 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.
1 is a conceptual diagram of a liquid storage tank management system according to an embodiment of the present invention.
1, a liquid storage
The
The
The
The
That is, the
The
The leaked
However, it takes a considerable amount of time (usually 20 days) for the leaked
In addition, since the maintenance time of the
Further, when the stored
Therefore, in the embodiment of the present invention, the
By circulating nitrogen in the
Further, it is possible to maximize the heat insulation performance of the
The heat insulating layer 13 is provided outside the
The heat insulating layer 13 may have any predetermined thickness in order to block heat transfer from the outside. The heat insulating layer 13 is filled with a heat insulating material having elasticity even at a very low temperature between a plurality of the heat insulating panels in order to prevent the generation of stress in the heat insulating layer in accordance with shrinkage and tensile of the
The insulating layer 13 may be fixed to the
The
The
The buffer tank 40 may temporarily store nitrogen discharged from the
The embodiment of the present invention may further include a
The
The
The
At this time, the
The
At this time, the
In the embodiment of the present invention, a
The
The
The
The
The
The
The
The
The
The
In the embodiment of the present invention, the
The
The
In the event of damage to the
That is, when the concentration of nitrogen discharged from the
Therefore, in the embodiment of the present invention, the amount of nitrogen supplied to the
As the flow rate of the nitrogen gas flowing through the
When the pressure of the
Nitrogen is continuously supplied to the
The
As described above, when the concentration of nitrogen discharged from the
The
The
The liquid storage
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.
It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
1: Liquid storage tank management system 10: Liquid storage tank
11: barrier 12: gap
13: Insulating layer 14: Inside liquid storage tank
15: Storage 20: Inner wall (Hull)
30: Hold Space 40: Buffer tank
41: nitrogen discharge line 42: vent line
43: nitrogen discharge valve 44: vent valve
50: nitrogen storage tank 51: nitrogen supply line
52: gap supply line 53: gap discharge line
54: Nitrogen supply valve 55: Storage return line
60: Drip tray 70: Support
80: sensor 90: nitrogen separator
100: control unit 110: alarm unit
Claims (7)
A nitrogen supply line for supplying nitrogen from the nitrogen storage tank to the gap;
A gas discharge line for discharging gas from the gap;
A sensor provided on the gas discharge line; And
And a control unit for calculating the concentration of nitrogen through the sensor,
Wherein,
Controlling the flow rate of nitrogen circulating through the gap,
Wherein the amount of nitrogen supplied to the gap is greater than the amount of nitrogen supplied when the concentration of nitrogen exceeds the predetermined concentration when the concentration of nitrogen is reduced to a predetermined concentration or less.
A buffer tank for storing the nitrogen; And
Further comprising a vent device for venting said nitrogen.
When the pressure of the support space between the liquid storage tank and the inner wall of the hull increases due to nitrogen discharged from the gap,
Wherein the nitrogen is stored in the buffer tank or discharged to the vent apparatus.
Further comprising a nitrogen separator disposed on the gas discharge line and separating nitrogen from gas exiting the gap.
And returning the separated material from the nitrogen separator to the liquid storage tank when the concentration of nitrogen discharged from the gap decreases to a predetermined concentration or less.
Further comprising an alarm unit for alerting the operator when the concentration of nitrogen discharged from the gap decreases below a preset concentration.
Priority Applications (1)
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KR1020140072149A KR101594247B1 (en) | 2014-06-13 | 2014-06-13 | A Maintenance System of Liquid Storage Tank |
Applications Claiming Priority (1)
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KR1020140072149A KR101594247B1 (en) | 2014-06-13 | 2014-06-13 | A Maintenance System of Liquid Storage Tank |
Publications (2)
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KR20150143939A KR20150143939A (en) | 2015-12-24 |
KR101594247B1 true KR101594247B1 (en) | 2016-02-17 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101917185B1 (en) * | 2017-12-19 | 2018-11-09 | 주식회사 가스팩 | Liquefied cargo containment tank |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101909040B1 (en) * | 2017-12-19 | 2018-10-17 | 주식회사 가스팩 | Liquefied cargo containment tank |
KR102085769B1 (en) * | 2018-05-24 | 2020-04-23 | (주)동성화인텍 | LNG Storage Tank And Cool-Down Method of LNG Storage Tank |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002312873A (en) | 2001-04-11 | 2002-10-25 | Mitsubishi Heavy Ind Ltd | System for monitoring heat-proof section of lng ship cargo tank |
KR100784896B1 (en) | 2007-05-11 | 2007-12-11 | 에스지에스 에스알에스 주식회사 | Apparatus for leak testing of lng cargo tank |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2500488B2 (en) * | 1991-02-08 | 1996-05-29 | ヤマハ株式会社 | Leak test method and leak test device |
KR101337643B1 (en) * | 2011-12-16 | 2013-12-05 | 삼성중공업 주식회사 | System and method to control Liquefied Natural Gas storage tank |
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2014
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002312873A (en) | 2001-04-11 | 2002-10-25 | Mitsubishi Heavy Ind Ltd | System for monitoring heat-proof section of lng ship cargo tank |
KR100784896B1 (en) | 2007-05-11 | 2007-12-11 | 에스지에스 에스알에스 주식회사 | Apparatus for leak testing of lng cargo tank |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101917185B1 (en) * | 2017-12-19 | 2018-11-09 | 주식회사 가스팩 | Liquefied cargo containment tank |
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