KR102030197B1 - Liquefied Natural Gas gasification facility using multi-heatexchanger - Google Patents

Liquefied Natural Gas gasification facility using multi-heatexchanger Download PDF

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Publication number
KR102030197B1
KR102030197B1 KR1020140050864A KR20140050864A KR102030197B1 KR 102030197 B1 KR102030197 B1 KR 102030197B1 KR 1020140050864 A KR1020140050864 A KR 1020140050864A KR 20140050864 A KR20140050864 A KR 20140050864A KR 102030197 B1 KR102030197 B1 KR 102030197B1
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KR
South Korea
Prior art keywords
natural gas
heat exchanger
liquefied natural
mixer
heating
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Application number
KR1020140050864A
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Korean (ko)
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KR20150124532A (en
Inventor
손영석
예상돈
Original Assignee
동의대학교 산학협력단
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Priority to KR1020140050864A priority Critical patent/KR102030197B1/en
Publication of KR20150124532A publication Critical patent/KR20150124532A/en
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Publication of KR102030197B1 publication Critical patent/KR102030197B1/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
    • 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
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, 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
    • 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
    • F17C2227/0302—Heat exchange with the fluid by heating
    • 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
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/068—Distribution pipeline networks

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

Abstract

The present invention is a device for vaporizing the liquefied natural gas stored in the storage tank (1), the mixer 10 is mixed with the liquefied natural gas and the evaporated gas supplied from the storage tank (1); A high pressure pump 20 for compressing the liquefied natural gas heated in the mixer 10; A first heat exchanger 30 which receives the liquefied natural gas compressed to a high pressure by the high pressure pump 20 and vaporizes it by primary heating; A second heat exchanger 40 for heating secondly the natural gas vaporized by first heating in the first heat exchanger 30; A third heat exchanger 50 for tertiaryly heating the natural gas secondarily heated in the second heat exchanger 50 and sending it out; A first pipe (60) for sending a portion of the natural gas sent from the first heat exchanger (30) to the mixer (10) between the first and second heat exchangers (30, 40); A second pipe 70 for sending a portion of the natural gas sent from the second heat exchanger 40 to the internal generator 7 between the second and third heat exchangers 40 and 50; It provides a vaporization device of liquefied natural gas comprising.

Description

Liquefied Natural Gas gasification facility using multi-heatexchanger

The present invention relates to a vaporization device of liquefied natural gas, and more particularly, by heating the natural liquefied gas in multiple stages for each temperature section and recovering and utilizing some of the heated natural gas for each section, the loss in the vaporization process of liquefied natural gas The present invention relates to a device capable of minimizing energy.

Liquefied Natural Gas (Liquefied Natural Gas, or LNG) is a fuel made by liquefying natural gas from oil drilling at high pressure. Since the liquefied natural gas has a significantly smaller volume in the liquid state than in the vapor state, it is economical to transport and use it in the liquefied state. For this reason, natural gas is cooled to -160 ° C or lower, liquefied, stored in tanks, transported by ship, and converted to gas at regasfication terminals near the port of interest, for storage bases, gas turbines or It is supplied to the place of use such as a generator.

Figure 2 shows an example of a device for vaporizing and supplying a conventional liquefied natural gas. Conventional liquefied natural gas vaporizer consists of a storage tank (1), a mixer (2), a high pressure pump (4) and a heat exchanger (6) in which a supply pump (3) is loaded. As follows.

First, the supply pump 3 charged to the liquefied natural gas filled in the storage tank 1 sends the liquefied natural gas to the mixer 2. At this time, the mixer 2 is supplied with the boil-off gas of the storage tank 1 at the same time. This boil-off gas is a gas filled in the upper space of the storage tank while a part of the liquefied natural gas stored in the storage tank 1 naturally evaporates. . In this case, in the mixer 2, the boil-off gas and the liquefied natural gas are mixed.

Accordingly, the liquefied natural gas having a relatively low temperature compared to the boil-off gas is supplied to the high pressure pump 4 in a state in which the heat is absorbed from the evaporated gas and heated up, and the high pressure pump 4 compresses the liquefied natural gas to high pressure. This is sent to the heat exchanger (6). The heat exchanger 6 is to heat the natural liquefied gas compressed at high pressure to room temperature to vaporize it with natural gas and then send it to the required place of use. The evaporated gas deprived of heat from the mixer (2) is liquefied through the pressure control valve is recovered to the storage tank (1).

By the way, the conventional vaporizer uses a method of recovering a portion of the natural gas vaporized at room temperature in the heat exchanger 6 in order to maintain the pressure of the mixer (2), in this case the heat input to the heat exchanger (6) Some of the energy will result in wasting to maintain the pressure of the mixer. Moreover, some of the natural gas generated in the heat exchanger 6 is used as a power source of the internal generator 7, and the heat energy introduced in that the power source of the internal generator 7 is sufficient even if it is not heated above a certain temperature. There was a disadvantage of not using a large number of.

Republic of Korea Patent Publication No. 2013-0127186, Republic of Korea Registered Patent No. 1219365

The present invention has been proposed to solve the problems of the prior art, and an object of the present invention is to provide a device that can minimize the heat energy wasted by more effectively using the heat energy input in the gasification of liquefied natural gas Is in.

The present invention is a device for vaporizing the liquefied natural gas stored in the storage tank 1, in order to achieve this object, the mixer 10 is mixed with the liquefied natural gas and the evaporated gas supplied from the storage tank (1); A high pressure pump 20 for compressing the liquefied natural gas heated in the mixer 10; A first heat exchanger 30 which receives the liquefied natural gas compressed to a high pressure by the high pressure pump 20 and vaporizes it by primary heating; A second heat exchanger 40 for heating secondly the natural gas vaporized by first heating in the first heat exchanger 30; A third heat exchanger 50 for tertiaryly heating the natural gas secondarily heated in the second heat exchanger 50 and sending it out; A first pipe (60) for sending a portion of the natural gas sent from the first heat exchanger (30) to the mixer (10) between the first and second heat exchangers (30, 40); A second pipe 70 for sending a portion of the natural gas sent from the second heat exchanger 40 to the internal generator 7 between the second and third heat exchangers 40 and 50; What is included is made into the technical feature.

The present invention adopts a method of dividing the liquefied natural gas into multiple stages for each temperature in the vaporization of the liquefied natural gas, and extracting through a separate pipe according to the use even when recovering and using a portion of the heated and vaporized natural gas. This makes it possible to make the most of the input thermal energy while minimizing wasted thermal energy.

1 is a schematic configuration diagram of an apparatus for vaporizing liquefied natural gas according to the present invention.
Figure 2 is a schematic configuration diagram of a conventional vaporization device of liquefied natural gas.

Preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings, in which embodiments of the present invention are not directly related to the technical features of the present invention, or in the art to which the present invention pertains. The detailed description of the matters apparent to those skilled in the art will be omitted.

1 is a schematic configuration diagram of a vaporization device of liquefied natural gas according to the present invention, the present invention is a mixer 10, a high pressure pump 20, and the first, second, third heat exchanger (30, 40, 50), and the first and second piping (60, 70) is characterized. Hereinafter, each of these components will be described in detail.

The mixer 10 is a portion where the liquefied natural gas and the evaporated gas filled in the storage tank 1 are mixed. The liquefied natural gas is supplied by the supply pump 3 charged in the storage tank 1, and the boil-off gas is part of the liquefied natural gas stored in the storage tank 1 to be evaporated and filled in the upper space of the storage tank. Gas is supplied. Boil off gas may be supplied to the compressor (5).

When the liquefied natural gas and the boil-off gas are supplied to the mixer 10, the heat of the boil-off gas having a relatively high temperature is naturally transferred to the liquefied natural gas in the mixing process, and thus the liquefied natural gas is heated up. Boil off gas is cooled. The reduced boil-off gas is liquefied through a separate pressure control valve and is recovered to the storage tank (1).

The high pressure pump 20 is a means for compressing the high pressure of the liquefied natural gas. Compression may vary depending on the intended use, but is preferably in the range of about 60 bar to 120 bar.

Each of the first, second, and third heat exchangers 30, 40, and 50 is a means for vaporizing liquefied natural gas, and each includes a heater for heating. The first heat exchanger 30 is a device for first heating the liquefied natural gas supplied from the high pressure pump 20, and the second heat exchanger 40 is a device for second heating by receiving the first heated natural gas. , The third heat exchanger 50 is a device for tertiary heating by receiving the secondary heated natural gas.

The natural gas sent through the third heat exchanger 50 is supplied to an on-site storage base, gas turbine or generator. It is optional whether or not to heat up to what temperature for each heat exchanger, but it is preferable to divide the heating range of each heat exchanger so that the natural gas sent out through the 3rd heat exchanger is maintained within 12 to 18 degreeC which is normal temperature. Will do.

Each of the first and second pipes 60 and 70 is a means for recovering a portion of the heated natural gas. Among them, the first pipe 60 sends a portion of the natural gas sent from the first heat exchanger 30 through the first and second heat exchangers 30 and 40 to the mixer 10. The natural gas recovered by the first pipe 60 is used to maintain the pressure of the mixer 10.

The second pipe 70 transmits a portion of the natural gas sent from the second heat exchanger 40 to the internal generator 7 between the second and third heat exchangers 40 and 50. The natural gas recovered through the second pipe 70 is used as a power source of the internal generator 7.

As described above, the present invention vaporizes the liquefied natural gas, and heats the liquefied natural gas by dividing the heat exchanger into multiple stages for each temperature, and additionally recovers a part of the natural gas corresponding to the required temperature range and supplies it to each place of use. Not only can the heat energy input from the outside be effectively used, but the heat energy that can be wasted by the recovered natural gas can be minimized.

In the above description, but limited to the preferred embodiments of the present invention, but this is only an example, the present invention is not limited to this may be modified and carried out in various ways, and further technical features based on the technical spirit disclosed It will be apparent that it can be implemented in addition.

1: storage tank 3: supply pump
7: internal generator 10: mixer
20: high pressure pump 30: the first heat exchanger
40: second heat exchanger 50: third heat exchanger
60: first pipe 70: second pipe

Claims (1)

An apparatus for vaporizing liquefied natural gas stored in the storage tank (1),
A mixer 10 into which liquefied natural gas and evaporated gas supplied from the storage tank 1 are mixed;
A high pressure pump 20 for compressing the liquefied natural gas heated in the mixer 10;
A first heat exchanger 30 which receives the liquefied natural gas compressed to a high pressure by the high pressure pump 20 and vaporizes it by primary heating;
A second heat exchanger 40 for heating secondly the natural gas vaporized by first heating in the first heat exchanger 30;
A third heat exchanger 50 for tertiaryly heating the natural gas secondarily heated in the second heat exchanger 50 and sending it out;
A first pipe (60) for sending a portion of the natural gas sent from the first heat exchanger (30) to the mixer (10) between the first and second heat exchangers (30, 40);
A second pipe 70 for sending a portion of the natural gas sent from the second heat exchanger 40 to the internal generator 7 between the second and third heat exchangers 40 and 50;
Gasification apparatus for liquefied natural gas comprising.
KR1020140050864A 2014-04-28 2014-04-28 Liquefied Natural Gas gasification facility using multi-heatexchanger KR102030197B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140050864A KR102030197B1 (en) 2014-04-28 2014-04-28 Liquefied Natural Gas gasification facility using multi-heatexchanger

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Application Number Priority Date Filing Date Title
KR1020140050864A KR102030197B1 (en) 2014-04-28 2014-04-28 Liquefied Natural Gas gasification facility using multi-heatexchanger

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KR102030197B1 true KR102030197B1 (en) 2019-10-10

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Publication number Priority date Publication date Assignee Title
KR102514083B1 (en) * 2018-08-01 2023-03-24 대우조선해양 주식회사 LNG Regasification System And Method
CN112856884B (en) * 2021-03-01 2024-04-12 广东广大新能源科技有限公司 Method for storing cold energy of liquefied natural gas, ice making method and device thereof

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KR20080097141A (en) * 2007-04-30 2008-11-04 대우조선해양 주식회사 Floating marine structure having in-tank re-condenser and method for treating boil-off gas on the floating marine structure
KR101229141B1 (en) * 2010-08-20 2013-02-01 현대중공업 주식회사 Fuel gas supply system using recycled production gas
KR101429550B1 (en) 2012-05-14 2014-08-12 대우조선해양 주식회사 Lng bunkering system of lng fueled ship

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