KR20130109559A - Liquefied natural gas regasification system with multi-stage - Google Patents

Liquefied natural gas regasification system with multi-stage Download PDF

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Publication number
KR20130109559A
KR20130109559A KR1020120031391A KR20120031391A KR20130109559A KR 20130109559 A KR20130109559 A KR 20130109559A KR 1020120031391 A KR1020120031391 A KR 1020120031391A KR 20120031391 A KR20120031391 A KR 20120031391A KR 20130109559 A KR20130109559 A KR 20130109559A
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South Korea
Prior art keywords
natural gas
gas
liquefied natural
vaporizer
lng
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KR1020120031391A
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Korean (ko)
Inventor
김소정
남기일
김재수
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현대중공업 주식회사
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Priority to KR1020120031391A priority Critical patent/KR20130109559A/en
Publication of KR20130109559A publication Critical patent/KR20130109559A/en

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    • 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
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • 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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • F17C9/04—Recovery of thermal energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F17C2227/0393—Localisation of heat exchange separate using a vaporiser

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

PURPOSE: An LNG regasification system with multistage evaporation is provided to reduce the amount of seawater used as a heating medium by evaporating LNG in multiple stages using evaporators which use heating media different from each other. CONSTITUTION: An LNG regasification system with multistage evaporation comprises an LNG tank (110), an intermediate storage tank (120), and evaporation equipment (V). The LNG tank stores LNG therein. The intermediate storage tank stores the LNG discharged from the LNG tank. The evaporation equipment evaporates the LNG discharged from the intermediate storage tank and supplies the evaporated LNG to a required place. The evaporation equipment comprises first, second, and third evaporators (130, 140, 150). The first evaporator evaporates the LNG using the heat of gas-phase heating media. The second evaporator evaporates the heating media used in the first evaporator using the heat of the seawater. The third evaporator re-evaporates the evaporated LNG using the heat of the seawater.

Description

Liquefied natural gas regasification system with multi-stage}

The present invention relates to a liquefied natural gas regasification system, and in particular, liquefied natural gas having a multi-stage vaporization method to vaporize the liquefied natural gas discharged from the intermediate storage tank in a multi-stage manner by using a heat transfer medium having different properties. It is about the system.

In general, LNG is a colorless, transparent cryogenic liquid which is cooled to -163 ℃ of natural gas mainly composed of methane and reduced to 1/600, and is generally referred to as liquefied natural gas. These LNGs are transported by LNG carriers in the mountains, stored in onshore LNG terminals, and supplied to consumers, or the floating offshore LNG terminals or natural LNG storage tanks that have natural gas supply functions by modifying LNG carriers are subsea. It will be sent directly to the customer from the fixed offshore LNG terminal.

The liquefied natural gas as described above is vaporized in a liquid state by a regasification system and supplied to a demand destination.

1 is a block diagram of a conventional liquefied natural gas regasification system.

The liquefied natural gas regasification system shown in FIG. 1 is a drawing attached to the registered patent No. 10-0774836 filed by the applicant, and in the present invention, a natural evaporation gas (NBOG) naturally occurring in a cargo tank 10. Alternatively, the BOG compressor 20 for compressing forced vaporization gas (FBOG) into natural vaporization gas (BOG) and providing the engine, boiler, or gas combustion unit (GCU), and liquefied natural gas discharged from the cargo tank are stored. An intermediate storage tank 30 and a vaporization facility 40 for vaporizing a liquefied natural gas discharged from the intermediate storage tank and supplying it to a demand destination are disclosed.

Meanwhile, the vaporization facility vaporizes the liquefied natural gas by using the heat of the heat transfer medium. At this time, the heat transfer medium uses sea water that can be easily obtained from the sea.

However, when liquefied natural gas is vaporized using seawater, a large amount of seawater is required, and therefore, a large amount of energy is consumed for circulation of seawater, and a large capacity pump must be provided, thereby increasing the installation cost. have.

In addition, the seawater used for the vaporization of liquefied natural gas has a problem of disturbing the ecosystem and causing environmental pollution as it is discharged to the sea while being cooled to a considerably low temperature.

Republic of Korea Patent Registration 10-0774836

The present invention has been made in view of the above problems, and an object of the present invention is to reduce the amount of use and temperature drop of seawater used as a heat transfer medium by vaporizing liquefied natural gas in a multi-step manner using heat transfer mediums having different properties. It is to provide a liquefied natural gas regasification system having a multi-stage vaporization method that can reduce the energy consumption for the circulation of sea water, and reduce disturbance of the ecosystem or environmental pollution by seawater discharged from the liquefied natural gas regasification system.

The liquefied natural gas regasification system having a multi-stage vaporization method of the present invention that achieves the object as described above and removes the drawbacks of the prior art, the LNG tank in which the liquefied natural gas is stored, and the liquefied discharged from the LNG tank A liquefied natural gas regasification system comprising an intermediate storage tank in which natural gas is stored and a vaporization facility for vaporizing and supplying liquefied natural gas discharged from the intermediate storage tank to a demand destination, wherein the vaporization facility includes the intermediate storage tank. A first vaporizer for vaporizing the liquefied natural gas discharged from the gas by using heat of the gaseous heat transfer medium; A second vaporizer used in the first vaporizer to vaporize the heat transfer medium changed into a liquid state using heat of sea water; And a third vaporizer for regasifying natural gas vaporized in the first vaporizer using heat having seawater.

Meanwhile, the first vaporizer may use propane as a heat transfer medium.

Meanwhile, a BOG compressor which receives and compresses the boil-off gas generated in the LNG tank and supplies the compressed gas to one or more facilities of an engine, a boiler, and a gas combustion unit; A first surplus gas control valve for selectively transferring the gas discharged through the BOG compressor to an intermediate storage tank; And a second surplus gas control valve for selectively transferring the gas discharged through the BOG compressor to a pipe mixer installed in a pipe connecting the intermediate storage tank and the LNG tank.

Meanwhile, a first emergency discharge control valve installed in an emergency discharge pipe branched from the gas discharge pipe extending from the third vaporizer and extended to the discharge gas treatment facility to control the flow path of the emergency discharge pipe; An orifice for controlling a flow rate of gas flowing through the first emergency discharge control valve; A second emergency discharge control valve installed in an emergency discharge pipe to control the gas flowing into the discharge gas treatment facility; A third emergency discharge control valve branched from the emergency discharge pipe and installed in a return pipe connected to a pressure reducing pipe connecting the intermediate storage tank and the LNG tank to control the flow path of the return pipe may be further included.

According to the present invention having the above characteristics, by using the first and the third vaporizer using different heat transfer medium to vaporize the liquefied natural gas step by step can reduce the amount of sea water used as the heat transfer medium in the third vaporizer, Accordingly, it is possible to reduce the energy or equipment scale required for the circulation of seawater, and to reduce the temperature decrease of seawater, thereby reducing the occurrence of disturbance of the ecosystem or environmental pollution by the discharged seawater.

In addition, by using the gaseous propane as the heat transfer medium in the first vaporizer, it is possible to vaporize natural gas using a significantly smaller amount of propane than seawater, thereby significantly reducing the volume of the liquefied natural gas regasification system. It works.

1 is a configuration diagram of a conventional liquefied natural gas regasification system,
Figure 2 is a block diagram showing the structure of a liquefied natural gas regasification system according to a preferred embodiment of the present invention.

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

2 is a block diagram showing the structure of a liquefied natural gas regasification system according to a preferred embodiment of the present invention.

The liquefied natural gas regasification system according to the present invention includes an LNG tank 110, an intermediate storage tank 120, and a vaporization plant (V).

At this time, the LNG tank 110 is stored in the liquefied natural gas, the pump 111 for discharging the stored liquefied natural gas is installed.

The intermediate storage tank 120 receives and stores the liquefied natural gas discharged from the LNG tank 110 by the pump 111.

On the other hand, the intermediate storage tank 120 is connected to the nitrogen generator 160 for supplying nitrogen for maintaining the internal pressure at a pressure suitable for the storage of the liquefied natural gas, and formed in the first vaporizer 130 to be transported as needed Is connected to the first vaporizer 130 to receive the natural gas, the pipe (L1) connecting the nitrogen generator 160 and the intermediate storage tank 120, the first vaporizer 130 and the intermediate storage tank 120 ), The valves 201 and 202 are provided to control the flow paths of the pipes L1 and L2.

In addition, when the pressure of the intermediate storage tank 120 is excessive, in order to reduce the pressure of the intermediate storage tank 120, the intermediate storage tank 120 so that the gas inside the intermediate storage tank 120 can be referred to the LNG tank 110 And the LNG tank 110 are connected by a pressure reducing pipe L3, and the pressure reducing pipe L3 is provided with a valve 203 for controlling the flow path.

The vaporization facility (V) is to vaporize the liquefied natural gas discharged from the intermediate storage tank 120 to supply to the demand destination. At this time, a pipe 121 for pumping the liquefied natural gas stored in the intermediate storage tank 120 to the vaporization installation (V) is installed in the pipe (L4) connecting the intermediate storage tank 120 and the vaporization installation (V). .

Meanwhile, the basic structure and function of the LNG tank 110, the intermediate storage tank 120, and the vaporization plant V are the same as those of the conventional system described with reference to FIG. 1.

However, in the liquefied natural gas regasification system according to the present invention, the vaporization facility (V) includes a first vaporizer 130, a second vaporizer 140, and a third vaporizer 150, wherein the first vaporizer 130 and The third vaporizer 150 has a difference in that the liquefied natural gas is vaporized in a multistage manner by using different types of heat transfer media.

The first vaporizer 130 is to vaporize the liquefied natural gas by receiving the liquefied natural gas discharged from the intermediate storage tank 120 by the pump 121 to exchange heat with the gaseous heat transfer medium. The first vaporizer 130 uses propane as a heat transfer medium, the gaseous propane is changed into a liquid state in the process of liquefied natural gas is vaporized through heat exchange between propane and liquefied natural gas in the gas state, Propane converted into a liquid state is stored in the propane tank 131.

Meanwhile, the propane stored in the propane tank 131 is circulated by the pump 132, and is vaporized by the second vaporizer 140 in such a circulation process and then transferred to the first vaporizer 130.

When the liquefied natural gas is vaporized using the gaseous propane as described above, the amount of propane used as the heat transfer medium can be significantly reduced than when using seawater.

Reference numeral 204 denotes a valve for controlling propane circulated by the pump 132.

As described above, the second vaporizer 140 is used to vaporize liquefied natural gas to vaporize propane changed into a liquid state. The second vaporizer 140 vaporizes propane using seawater as a heat transfer medium.

The third vaporizer 150 receives the natural gas vaporized from the first vaporizer 130 and performs the vaporization process again. The third vaporizer 150 receives the natural gas through heat exchange between the natural gas delivered from the first vaporizer 130 and seawater. Vaporized.

Meanwhile, since the third vaporizer 150 receives and vaporizes the natural gas primarily vaporized by propane, the amount of seawater used as a heat transfer medium can be reduced compared to the conventional one, and the temperature of the seawater used as the heat transfer medium is reduced. The extent of degradation can also be reduced.

The third vaporizer 150 is connected to the discharge pipe (L5) for finally supplying the vaporized natural gas to the demand destination, the discharge pipe (L5) is provided with a valve 205 for controlling the flow path of the discharge pipe.

Meanwhile, the liquefied natural gas regasification system according to the present invention compresses the boil-off gas generated naturally or forcibly in the LNG tank 110 and supplies the BOG compressor 170 to supply one or more facilities of an engine, a boiler, and a gas combustion unit. Is further provided, the excess gas that is not used in the engine or the boiler of the gas discharged through the BOG compressor 170 is returned to the intermediate storage tank 120 or the pipe mixer 180 to control to be absorbed in the liquefied natural gas The first surplus gas control valve 206 and the second surplus gas control valve 207 are further included.

In this case, the first surplus gas control valve 206 extends from the BOG compressor 170 and branches from the pipe L6 through which the compressed natural gas is discharged and extends into the intermediate storage tank 120 (L7). ), And the second surplus gas control valve 207 is installed in the second surplus gas discharge pipe L8 branched from the pipe L6 and extending to the pipe mixer 180.

Meanwhile, in describing the structures of the first surplus gas discharge pipe L7 and the second surplus gas discharge pipe L8, the first and second surplus gas discharge pipes L7 and L8 are branched from the pipe L6 for convenience of description. Although it demonstrated, the surplus gas piping L8 of any one of the 1st, 2nd surplus gas discharge pipes L7 and L8 branches off from the piping L6, and the other surplus gas piping from this surplus gas piping L8 is carried out. (L7) has a branched structure.

For reference, the pipe mixer 180 is installed in the pipe L9 connecting the LNG tank 110 and the intermediate storage tank 120, and the liquefied natural gas and the second surplus gas control valve discharged from the LNG tank 110. The surplus gas delivered through 207 is mixed and supplied to the intermediate storage tank 120.

As such, by using the first surplus gas control valve 206 and the second surplus gas control valve 207 to return the surplus gas to the intermediate storage tank 120, the natural gas inevitably supplied to the gas combustion unit and combusted By reducing the amount of gas, the waste of natural gas can be reduced, and the operating cost of the gas combustion unit can be reduced.

Meanwhile, when an emergency situation such as a gas leak or a fire occurs, the liquefied natural gas regenerator system is stopped. At this time, the valve 205 installed in the discharge pipe L5 blocks the flow path to block natural gas supplied to the demand destination.

When the natural gas supplied to the demand source is cut off, the pressure inside the liquefied natural gas regasification system rises rapidly, and the internal pressure before the internal pressure reaches the allowable pressure to prevent an accident due to the internal pressure rise. Must be discharged to the outside.

In the liquefied natural gas regasification system according to the present invention is provided with an emergency discharge pipe (L10) branched from the discharge pipe (L5) extending from the third vaporizer 150 and extended to the exhaust gas treatment facility 190, the emergency discharge pipe A first emergency discharge control valve 208, an orifice 209, and a second emergency discharge control valve 210 are installed at L10, and the emergency discharge pipe L10 is returned to a pressure reducing pipe L3. L11 is connected and a third emergency discharge control valve 211 is provided at the return pipe L11 to control the flow path of the pipe.

On the other hand, the first emergency discharge control valve 208 normally blocks the flow path of the emergency discharge pipe (L10), and when the emergency occurs by operating the control unit not shown to open the flow path of the emergency discharge pipe (L10). Of course, the remaining valves 201, 202, 203, 204, 205, 206, 207, 210 and 211 are also operated by signals generated from the control unit.

On the other hand, the natural gas delivered to the orifice 209 through the first emergency discharge control valve 208 is discharged with a limited maximum flow rate through the orifice 209, and the natural gas discharged at the limited flow rate is discharged to the second emergency. Due to the closing of the discharge control valve 210 and the opening of the third emergency discharge control valve 211 is returned to the LNG tank 110 through the flow path of the return pipe (L11) secured.

When the internal pressure of the LNG tank 110 is increased by the gas returned to the LNG tank 110 as described above, the third emergency discharge control valve 211 is closed when the LNG tank 110 cannot receive any more natural gas. The flow path of the return pipe L11 is blocked, and the second emergency discharge control valve 210 is opened to open the flow path of the emergency discharge pipe L10 connected to the exhaust gas treatment facility 190 to discharge the gas treatment facility 190. ) To deliver the gas.

At this time, the exhaust gas treatment facility 190 may be configured as a gas combustion unit or a plumbing facility for discharging natural gas to the atmosphere.

It will be described the operation process of the liquefied natural gas regasification system of the present invention configured as described above, through which the effect of the liquefied natural gas regasification system of the present invention will be described.

The liquefied natural gas stored in the LNG tank 110 is transferred to the intermediate storage tank 120 by the pump 111 and stored.

On the other hand, the boil-off gas generated in the LNG tank 110 is compressed by the BOG compressor 170 and supplied to the engine or boiler and used as fuel, and when it is not required to be used in the engine or boiler or extra boil-off gas is generated. The first surplus gas control valve 206 or the second surplus gas control valve 207 is opened to return the surplus gas to the intermediate storage tank 120 to be absorbed by the liquefied natural gas, thereby preventing the waste of the evaporated gas. In particular, there is an advantage that can reduce the operating costs of the gas combustion unit by reducing the use of the gas combustion unit.

Meanwhile, the liquefied natural gas stored in the intermediate storage tank 120 is delivered to the first vaporizer 130 by the pump 121, wherein the first vaporizer 130 uses liquefied natural gas using a propane in a gaseous state as a heat transfer medium. Will be first vaporized.

For reference, since gaseous propane has a higher heat exchange efficiency than seawater, it is possible to vaporize natural gas using a relatively small amount of propane compared to seawater, thereby reducing the volume of related equipment as compared to the prior art. .

Meanwhile, propane, which is used to vaporize liquefied natural gas and changed into a liquid state, is stored in the propane tank 131, and the propane stored in the propane tank 131 is circulated through the second vaporizer 140 by the pump 132. After evaporating through heat exchange with seawater, it is supplied back to the first vaporizer 130.

Meanwhile, the natural gas vaporized in the first vaporizer 130 is delivered to the third vaporizer 150, where the third vaporizer 150 performs the vaporization process again using seawater as a heat transfer medium.

As described above, the liquefied natural gas regasification system according to the present invention by using the first vaporizer 130 and the third vaporizer 150 to vaporize the liquefied natural gas in a multi-step manner, the first vaporizer 130 The vaporization process is carried out using propane, and the third vaporizer 150 performs the vaporization process using sea water, thereby reducing the volume of the liquefied natural gas regasification system, reducing the amount of seawater used and the temperature drop of seawater. Can be reduced.

In addition, the liquefied natural gas regasification system according to the present invention can prevent the consumption of unnecessary natural gas by returning the natural gas inside the vaporization plant (V) to the LNG tank 110 in the event of an emergency, inevitable gas The combustion unit has the advantage of being able to flexibly respond to various situations, such as burning the exhaust gas or discharge to the atmosphere.

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 in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

Description of the Related Art
110: LNG tank 120: intermediate storage tank
130: first carburetor 140: second carburetor
150: third carburetor 160: nitrogen generator
(170): BOG compressor (180): piping mixer
(190): exhaust gas treatment equipment
206: first surplus gas control valve
207: second surplus gas control valve
(208): first emergency discharge control valve
(209): Orifice
210: second emergency discharge control valve
311: third emergency discharge control valve

Claims (4)

The LNG tank 110 in which the liquefied natural gas is stored, the intermediate storage tank 120 in which the liquefied natural gas discharged from the LNG tank 110 is stored, and the liquefied natural gas discharged from the intermediate storage tank 120 is vaporized. In a liquefied natural gas regasification system including a vaporization plant (V) to supply to the demand destination,
The vaporization equipment (V),
A first vaporizer 130 for vaporizing the liquefied natural gas discharged from the intermediate storage tank 120 by using heat of a gaseous heat transfer medium;
A second vaporizer 140 which is used in the first vaporizer 130 to vaporize the heat transfer medium changed into a liquid state using heat of sea water; And
Liquefied natural gas regasification system having a multi-stage vaporization system, characterized in that consisting of a third vaporizer (150) for regasifying the natural gas vaporized in the first vaporizer 130 using the heat of sea water. The method according to claim 1,
The first vaporizer 130 is a liquefied natural gas regasification system having a multi-stage vaporization method, characterized in that using the propane as a heat transfer medium. The method according to claim 1,
BOG compressor 170 for receiving and compressing the boil-off gas generated in the LNG tank 110 and supplies it to any one or more facilities of the engine, boiler, gas combustion unit;
A first surplus gas control valve 206 for selectively transferring the gas discharged through the BOG compressor 170 to the intermediate storage tank 120; And
Second surplus gas control valve for selectively passing the gas discharged through the BOG compressor 170 to the pipe mixer 180 installed in the pipe (L9) connecting the intermediate storage tank 120 and the LNG tank 110. The liquefied natural gas regasification system further comprises. The method according to claim 1,
The first emergency discharge is installed in the emergency discharge pipe (L10) branched from the gas discharge pipe (L5) extending from the third vaporizer 150 and extended to the discharge gas treatment facility 190 to control the flow path of the emergency discharge pipe (L10). Control valve 208;
An orifice (209) for controlling the flow rate of the gas flowing through the first emergency discharge control valve (208);
A second emergency discharge control valve (210) installed in the emergency discharge pipe (L10) to control the gas flowing into the exhaust gas treatment facility (190);
Branched from the emergency discharge pipe (L10), is installed in the return pipe (L11) connected to the pressure reducing pipe (L3) connecting the intermediate storage tank 120 and the LNG tank 110 to control the flow path of the return pipe (L11). Liquefied natural gas regasification system having a multi-stage gasification method further comprises a third emergency discharge control valve (211).
KR1020120031391A 2012-03-28 2012-03-28 Liquefied natural gas regasification system with multi-stage KR20130109559A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101525679B1 (en) * 2013-10-22 2015-06-03 현대중공업 주식회사 A Liquefied Gas Treatment System
WO2015133806A1 (en) * 2014-03-07 2015-09-11 대우조선해양 주식회사 Fuel supply method and system for barge mounted power plant
KR20170040942A (en) 2015-10-06 2017-04-14 현대중공업 주식회사 Sea Water Supply System for Liquefied Gas Regasification Apparatus
WO2018074835A1 (en) * 2016-10-19 2018-04-26 대우조선해양 주식회사 Liquefied gas regasification system and operating method
KR20190003141A (en) * 2017-06-30 2019-01-09 삼성중공업 주식회사 Liquefied gas re-gasification system
CN111649232A (en) * 2020-07-07 2020-09-11 苏州料金气体有限公司 Vaporization device of liquefied gas storage tank
KR20200110058A (en) * 2019-03-15 2020-09-23 지에스건설 주식회사 Separable lng regasification installation

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101525679B1 (en) * 2013-10-22 2015-06-03 현대중공업 주식회사 A Liquefied Gas Treatment System
WO2015133806A1 (en) * 2014-03-07 2015-09-11 대우조선해양 주식회사 Fuel supply method and system for barge mounted power plant
KR20170040942A (en) 2015-10-06 2017-04-14 현대중공업 주식회사 Sea Water Supply System for Liquefied Gas Regasification Apparatus
WO2018074835A1 (en) * 2016-10-19 2018-04-26 대우조선해양 주식회사 Liquefied gas regasification system and operating method
KR20190003141A (en) * 2017-06-30 2019-01-09 삼성중공업 주식회사 Liquefied gas re-gasification system
KR20220068208A (en) * 2017-06-30 2022-05-25 삼성중공업 주식회사 Liquefied gas re-gasification system
KR20200110058A (en) * 2019-03-15 2020-09-23 지에스건설 주식회사 Separable lng regasification installation
WO2020190003A1 (en) * 2019-03-15 2020-09-24 지에스건설 주식회사 Dividable lng regasification facility
CN111649232A (en) * 2020-07-07 2020-09-11 苏州料金气体有限公司 Vaporization device of liquefied gas storage tank

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