NO331941B1 - LNG regasification system for supplying evaporated LNG to a natural gas distribution system - Google Patents

LNG regasification system for supplying evaporated LNG to a natural gas distribution system Download PDF

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Publication number
NO331941B1
NO331941B1 NO20100009A NO20100009A NO331941B1 NO 331941 B1 NO331941 B1 NO 331941B1 NO 20100009 A NO20100009 A NO 20100009A NO 20100009 A NO20100009 A NO 20100009A NO 331941 B1 NO331941 B1 NO 331941B1
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Norway
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lng
pressure
natural gas
tank
distribution system
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NO20100009A
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Norwegian (no)
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NO20100009A1 (en
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Roy Inge Sorensen
Per Erik Christiansen
Ketil Lovlimo Skauge
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Moss Maritime As
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Priority to NO20100009A priority Critical patent/NO331941B1/en
Priority to PCT/NO2011/000003 priority patent/WO2011084066A1/en
Publication of NO20100009A1 publication Critical patent/NO20100009A1/en
Publication of NO331941B1 publication Critical patent/NO331941B1/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
    • 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
    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0128—Shape spherical or elliptical
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • 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
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    • 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
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
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    • 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
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • F17C2223/047—Localisation of the removal point in the liquid with a dip tube
    • 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
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/035—High pressure, i.e. between 10 and 80 bars
    • 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
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0171—Arrangement
    • F17C2227/0178—Arrangement in the vessel
    • 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
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0171—Arrangement
    • F17C2227/0185—Arrangement comprising several pumps or compressors
    • 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
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/033—Treating the boil-off by recovery with cooling
    • F17C2265/034—Treating the boil-off by recovery with cooling with condensing the gas phase
    • 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
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/037—Treating the boil-off by recovery with pressurising
    • 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
    • F17C2265/05—Regasification
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • F17C2270/0107—Wall panels
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0118—Offshore
    • F17C2270/0123—Terminals
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0134—Applications for fluid transport or storage placed above the ground
    • F17C2270/0136—Terminals

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

Abstract

LNG-regassifiseringssystem for forsyning av fordampet LNG til et naturgassrørdistribusjonssystem (60) består av en tankanordning (10) for å inneholde flytende naturgass ved eller så vidt over atmosfærisk trykk, en pumpeanordning (40) og en fordampingsanordning (50) koblet mellom pumpeanordningen (40) og naturgassrørdistribusjonssystemet (60). Pumpeanordningen (40) er anbrakt i tankanordningen (10), og konfigurert til å øke trykket til LNG'en fra trykket i tankanordningen (10) til et trykk høyere enn trykket i naturgassrørdistribusjonssystemet(60).LNG regasification system for supplying evaporated LNG to a natural gas distribution system (60) consists of a tank device (10) for containing liquid natural gas at or above atmospheric pressure, a pumping device (40) and an evaporating device (50) coupled between the pumping device (40). ) and the natural gas pipeline distribution system (60). The pump assembly (40) is disposed in the tank assembly (10) and configured to increase the pressure of the LNG from the pressure assembly in the tank assembly (10) to a pressure higher than the pressure in the natural gas distribution system (60).

Description

LNG-regassifiseringssystem for forsyning av fordampet LNG til et naturgassrørdistribusj onssystem LNG regasification system for supplying vaporized LNG to a natural gas pipeline distribution system

Oppfinnelsens område Field of the invention

Den foreliggende oppfinnelsen angår et LNG-regassifiseringssystem for forsyning av fordampet LNG til et naturgassrørdistribusjonssystem. The present invention relates to an LNG regasification system for supplying vaporized LNG to a natural gas pipeline distribution system.

Bakgrunn Background

En LNG-mottaks- og regassifiseringsterminal er et anlegg for lagring og regassifisering av flytende naturgass (heretter kalt LNG). I tillegg til import og lagring av LNG, sikrer også terminalen konvertering av LNG til naturgass (heretter kalt NG) ment for kommersielt forbruk. NG leveres så videre til det lokale gassrørdistribusjonssystemet for NG, for distribusjon til sluttforbrukere som kan være anlegg for elektrisk kraftproduksjon, generell industri, forretningsbygninger eller private husholdninger, etc. Regassifiseringsprosessen medfører også øking av trykket fra lagringsforholdene til det relevante trykknivået for gassrørdistribusjonssystemet. Trykket til gassrørdistribusjonsystemet kan variere fra land til land og område til område, men er typisk mellom 50 og 100 bar. An LNG receiving and regasification terminal is a facility for the storage and regasification of liquefied natural gas (hereinafter referred to as LNG). In addition to the import and storage of LNG, the terminal also ensures the conversion of LNG to natural gas (hereinafter referred to as NG) intended for commercial consumption. NG is then delivered to the local gas pipe distribution system for NG, for distribution to end consumers which may be facilities for electric power generation, general industry, commercial buildings or private households, etc. The regasification process also entails increasing the pressure from the storage conditions to the relevant pressure level for the gas pipe distribution system. The pressure of the gas pipe distribution system can vary from country to country and area to area, but is typically between 50 and 100 bar.

Naturgassen lagres som LNG ved atmosfærisk trykk i én eller flere lagringstanker som er en del av mottaksterminalen. Andre essensielle deler av konvensjonelle mottaksterminaler er overføringspumper, boosterpumper, rekondensere, fordampere og avkokingshåndteringsutstyr. Prosessystemene og arrangementet hos en typisk mottaksterminal er vist i fig. 1. Mottaksterminalen kan være plassert på land eller offshore. I det sistnevnte tilfellet kalles det en flytende lagrings- og regassifiseringsenhet (FSRU - floating storage and re-gasification unit). Trykket i LNG-tankene er atmosfærisk (1 bar absolutt) og tilsvarende LNG-lagringstemperatur er -160°C. The natural gas is stored as LNG at atmospheric pressure in one or more storage tanks that are part of the receiving terminal. Other essential parts of conventional receiving terminals are transfer pumps, booster pumps, recondensers, evaporators and decoction handling equipment. The process systems and arrangement of a typical receiving terminal are shown in fig. 1. The receiving terminal can be located on land or offshore. In the latter case, it is called a floating storage and re-gasification unit (FSRU - floating storage and re-gasification unit). The pressure in the LNG tanks is atmospheric (1 bar absolute) and the corresponding LNG storage temperature is -160°C.

Artikkelen " EFFORTS TO MINIMIZE THE ENVIROMENTAL LOAD AT LNG RECEIVING TERMINALS", publisert på 23rd World Gas Conference i Amsterdam i 2006 av M. Kajitani beskriver måter å redusere effektforbruket involvert i regassifiseringsprosesser ved en konvensjonell mottaks- og regassifiseringsterminal ( Ogishima). The article "EFFORTS TO MINIMIZE THE ENVIROMENTAL LOAD AT LNG RECEIVING TERMINALS", published at the 23rd World Gas Conference in Amsterdam in 2006 by M. Kajitani describes ways to reduce the power consumption involved in regasification processes at a conventional receiving and regasification terminal (Ogishima).

Artikkelen " LNG Quality and Interchangeability", Triennium Work Report 2006-2009, publisert på 24th World Gas Conference i Argentina i 2009 er relatert til forskjeller i LNG- bestandeler ( blandingsforhold mellom ulike hydrokarboner, nitrogen, karbondioksyd etc) i LNG fra ulike deler av verden, og beskriver måter å standardisere sammensetningen av LNG på og anbefaleringer for drift av konvensjonelle terminaler. The article "LNG Quality and Interchangeability", Triennium Work Report 2006-2009, published at the 24th World Gas Conference in Argentina in 2009 is related to differences in LNG components (mixing ratio between different hydrocarbons, nitrogen, carbon dioxide etc) in LNG from different parts of world, and describes ways to standardize the composition of LNG and recommendations for the operation of conventional terminals.

Artikkelen " Basic Design of LNG Receiving Terminal flow" hentet fra http:// www. tokyo- gas. co. jp/ techno/ stp/ 03al e. html gir en oversikt over de ulike delene av en konvensjonell terminal. The article " Basic Design of LNG Receiving Terminal flow" retrieved from http:// www. tokyo gas. co. jp/ techno/ stp/ 03al e. html gives an overview of the various parts of a conventional terminal.

D4: Artikkelen " Outline description of largest Tokyo Gas LNG Terminal ( Sodegaura), hentet fra fra http:// chandra28288. wordpress. com/ 2009/ 12/ 17/ lagrest-tokyo- gas- lng- terminal- sodegaura. er en rapport av et besøk til terminalen Sodegaura i Japan med en oppsummering av hva LNG er, inkludert egenskaper etc. Den viser også et forenklet flytskjema av prosessystemet hos terminalen. D4: The article " Outline description of largest Tokyo Gas LNG Terminal ( Sodegaura), retrieved from from http:// chandra28288. wordpress. com/ 2009/ 12/ 17/ lagrest-tokyo- gas- lng- terminal- sodegaura. is a report of a visit to the Sodegaura terminal in Japan with a summary of what LNG is, including properties etc. It also shows a simplified flow chart of the process system at the terminal.

Den konvensjonelle måten å arrangere gassmottaksterminalen hvor LNG-produktet leveres fra en LNG-frakter (LNG-skip) er vist i fig. 1. LNG-produktet lastes av en LNG-frakter til terminalens lagringstank, hvor LNG'en lagres ved atmosfærisk trykk og en temperatur på -160°. The conventional way of arranging the gas receiving terminal where the LNG product is delivered from an LNG carrier (LNG ship) is shown in fig. 1. The LNG product is loaded by an LNG carrier to the terminal's storage tank, where the LNG is stored at atmospheric pressure and a temperature of -160°.

Lagringstanken er utstyrt med en overføringspumpe 2 som overfører LNG ut av tanken og inn i en kombinert rekondenser/utjevningstank 3. Denne enheten har to formål: den tilveiebringer en konstant sugehøyde for en boosterpumpe eller høytrykksutsendingspumpe 4, og den tilveiebringer kondensering av deler av avkokingsgassen. Rekondenseren holdes ved et trykknivå på 2-4 bar. The storage tank is equipped with a transfer pump 2 that transfers the LNG out of the tank and into a combined recondenser/equalization tank 3. This unit has two purposes: it provides a constant suction head for a booster pump or high-pressure sending pump 4, and it provides condensation of part of the boil-off gas. The recondenser is kept at a pressure level of 2-4 bar.

I høytrykksutsendingspumpeanordningen 4 økes LNG-trykket fra nivået i utjevningstanken til nivået som opprettholdes i naturgassrørdistribusjonssystemet (dvs. 50-100 bar). Høytrykkspumpeanordningen er normalt en flertrinnsenhet, hvor trykket økes trinnvis. Direkte nedstrøms fra utsendingspumpen kommer LNG'en inn i en fordampingsanordning 5 hvor den fordampes til naturgass (NG) for overføring til det eksterne gassrørdistribusjonssystemet. Fordampingsprosessen skjer ved konstant trykk. In the high-pressure dispatch pump device 4, the LNG pressure is increased from the level in the equalization tank to the level maintained in the natural gas pipe distribution system (ie 50-100 bar). The high-pressure pump device is normally a multi-stage unit, where the pressure is increased step by step. Directly downstream from the sending pump, the LNG enters an evaporation device 5 where it is evaporated into natural gas (NG) for transfer to the external gas pipe distribution system. The evaporation process takes place at constant pressure.

Siden LNG'en i lagringstanken holdes ved kokepunktet (-160°C) vil den absorbere varme fra omgivelsene og noe av LNG'en vil fordampe. Den fordampede LNG'en kalles avkokingsgass, og denne gassen må evakueres fra tanken for å hindre fordampingstrykket fra å øke. Avkokingshåndteringssystemet består av en returkompressor/blåser 6, en varmeutveksler 7, og en avkokingsgasskompressor 8. Under normal drift anvendes avkokingsgassen som brensel i kraftgenereringssystemet hos regassifiseringsanlegget. Dersom drivgassforbruket er lavt, kan gass gjøres flytende igjen i rekondenseren/utjevningstanken, og eksporteres som NG. Avkokingshåndteringssystemet er ikke modifisert eller endret som en del av denne oppfinnelsen, og vil ikke bli beskrevet videre i detalj. Since the LNG in the storage tank is kept at the boiling point (-160°C), it will absorb heat from the surroundings and some of the LNG will evaporate. The evaporated LNG is called boil-off gas, and this gas must be evacuated from the tank to prevent the evaporation pressure from increasing. The decoction handling system consists of a return compressor/blower 6, a heat exchanger 7, and a decoction gas compressor 8. During normal operation, the decoction gas is used as fuel in the power generation system at the regasification plant. If propellant gas consumption is low, gas can be liquefied again in the recondenser/equalization tank, and exported as NG. The decoction handling system has not been modified or changed as part of this invention, and will not be described further in detail.

Det skal nevnes at fig. 1 er noe forenklet, en typisk regassifiseringsterminal kan bestå av én eller flere lagringstanker og flere høytrykkspumpeanordninger og fordampere, f.eks. på grunn av redundans. It should be mentioned that fig. 1 is somewhat simplified, a typical regasification terminal may consist of one or more storage tanks and several high-pressure pumping devices and evaporators, e.g. due to redundancy.

Fig. 2 er en skjematisk illustrasjon av fig. 1, hvor avkokingshåndteringssystemet er utelatt. Som beskrevet ovenfor, omfatter det tidligere kjente systemet en tankanordning 1, overføringspumpen 2, utjevningstanken 3, Fig. 2 is a schematic illustration of fig. 1, where the decoction management system is omitted. As described above, the previously known system comprises a tank device 1, the transfer pump 2, the equalization tank 3,

høytrykksutsendingspumpen 4 og fordamperen 5. the high-pressure delivery pump 4 and the evaporator 5.

Dermed konverteres LNG'en i tankanordningen 1 til NG ved en temperatur og et trykk som er i samsvar med kravene i gassrørdistribusjonssystemet 6. Thus, the LNG in the tank device 1 is converted to NG at a temperature and pressure that is in accordance with the requirements of the gas pipe distribution system 6.

Formålet med den foreliggende oppfinnelsen er å forenkle og redusere kostnader involvert ved regassifiseringsprosessen som består av systemene for overføring av LNG fra en tank, og konvertering av denne til naturgass ved økt trykk. The purpose of the present invention is to simplify and reduce costs involved in the regasification process, which consists of the systems for transferring LNG from a tank, and converting this to natural gas at increased pressure.

Sammendrag av oppfinnelsen Summary of the invention

Den foreliggende oppfinnelsen angår et LNG-regassifiseringssystem for forsyning av fordampet LNG til et naturgassrørdistribusjonssystem, hvor systemet består av: en tankanordning for å inneholde flytende naturgass ved eller så vidt over atmosfærisk trykk; The present invention relates to an LNG regasification system for supplying vaporized LNG to a natural gas pipeline distribution system, where the system consists of: a tank device for containing liquid natural gas at or slightly above atmospheric pressure;

en pumpeanordning; a pumping device;

en fordampingsanordning koblet mellom pumpeanordningen og naturgassrørdistribusjonssystemet; an evaporation device connected between the pumping device and the natural gas pipe distribution system;

hvor pumpeanordningen er lokalisert i tankanordningen,karakterisert vedat oe hvor pumpeanordningen er konfigurert til å øke trykket til LNG'en fra trykket i tankanordningen til et trykk så vidt høyere enn trykket hos where the pump device is located in the tank device, characterized by oe where the pump device is configured to increase the pressure of the LNG from the pressure in the tank device to a pressure slightly higher than the pressure of

naturgassrørdistribusjonssystemet, the natural gas pipeline distribution system,

I et aspekt av oppfinnelsen er pumpeanordningen plassert nær bunnen av tankanordningen. In one aspect of the invention, the pump device is located near the bottom of the tank device.

I et aspekt av oppfinnelsen er tankanordningen en sfærisk tank. In one aspect of the invention, the tank device is a spherical tank.

I et aspekt av oppfinnelsen består systemet videre av røranordninger for transportering av gass mellom pumpeanordningen og fordampingsanordningen, og fra fordampingsanordningen til naturgassrørdistribusjonssystemet. In one aspect of the invention, the system further consists of pipe devices for transporting gas between the pump device and the evaporation device, and from the evaporation device to the natural gas pipe distribution system.

I et aspekt av oppfinnelsen omfatter systemet videre ventilanordninger for styring av gasstrømmen i systemet. In one aspect of the invention, the system further comprises valve devices for controlling the gas flow in the system.

Detaljert beskrivelse Detailed description

Fig. 1 og 2 er beskrevet i introduksjonen ovenfor. Fig. 3 illustrerer et skjematisk riss av et LNG-regassifiseringssystem for forsyning av fordampet LNG til et naturgassrørdistribusjonssystem 60 i samsvar med oppfinnelsen. Fig. 1 and 2 are described in the introduction above. Fig. 3 illustrates a schematic view of an LNG regasification system for supplying vaporized LNG to a natural gas pipeline distribution system 60 in accordance with the invention.

Systemet består av en tankanordning 10, en pumpeanordning 40 og en fordampingsanordning 50, koblet mellom pumpeanordningen 40 og naturgassrørdistribusjonssystemet 60. The system consists of a tank device 10, a pump device 40 and an evaporation device 50, connected between the pump device 40 and the natural gas pipe distribution system 60.

Som nevnt i introduksjonen ovenfor, lagres eller oppbevares LNG i tanken 10 ved eller litt over atmosfærisk trykk, med tilsvarende temperatur nær -160°C. Tankanordningen 10 kan være enhver type atmosfærisk LNG-oppbevaringssystem slik som en sfærisk tank, en sylindrisk tank eller en membrantank. Den kan være anbragt i eller på et skip eller på land. As mentioned in the introduction above, LNG is stored in the tank 10 at or slightly above atmospheric pressure, with a corresponding temperature close to -160°C. The tank device 10 can be any type of atmospheric LNG storage system such as a spherical tank, a cylindrical tank or a membrane tank. It can be located in or on a ship or on land.

Pumpeanordningen 40 er plassert i tankanordningen 10. Som vist i fig. 3 er pumpeanordningen 40 plassert nær bunnen av tankanordningen. Pumpeanordningen 40 er konfigurert til å øke temperaturen til LNG fra trykket i tankanordningen 10 til et trykk så vidt høyere enn trykket hos naturgassrørdistribusjonssystemet 60. The pump device 40 is placed in the tank device 10. As shown in fig. 3, the pump device 40 is located near the bottom of the tank device. The pump device 40 is configured to increase the temperature of the LNG from the pressure in the tank device 10 to a pressure slightly higher than the pressure of the natural gas pipe distribution system 60.

I fordampingsanordningen 50 fordampes LNG ved konstant trykk, og overhetes til en temperatur over 0°C for å hindre isdannelse i naturgassrørdistribusjonssystemet. Varmen som kreves for å fullføre denne konverteringen forsynes til fordamperen i form av damp, elektrisitet eller vann. In the evaporation device 50, LNG is vaporized at constant pressure, and superheated to a temperature above 0°C to prevent ice formation in the natural gas pipe distribution system. The heat required to complete this conversion is supplied to the evaporator in the form of steam, electricity or water.

Dersom trykket tilveiebrakt av pumpeanordningen 40 er lavere enn trykket til naturgassrørdistribusjonssystemet, vil gass kunne strømme fra naturgassrørdistribusjonssystemet. Dette er ikke en ønsket strømningsretning. Derfor kan ventiler eller lignende være tilveiebrakt for å hindre at gass strømmer i en slik retning. If the pressure provided by the pump device 40 is lower than the pressure of the natural gas pipe distribution system, gas will be able to flow from the natural gas pipe distribution system. This is not a desired flow direction. Therefore, valves or the like can be provided to prevent gas flowing in such a direction.

Dersom trykket som tilveiebringes av pumpeanordningen 40 er lik trykket hos naturgassrørdistribusjonssystemet, oppnås en likevektstilstand, og ingen gass strømmer i noen som helst retning. If the pressure provided by the pump device 40 is equal to the pressure of the natural gas pipe distribution system, a state of equilibrium is achieved and no gas flows in any direction.

Dersom gassen som tilveiebringes av pumpeanordningen 40 er høyere enn trykket til naturgassrørdistribusjonssystemet, vil gass strømme fra tankanordningen til naturgassrørdistribusjonssystemet. Uttrykket "et trykk høyere enn" eller "et trykk så vidt høyere enn" anvendes derfor her for å beskrive trykket som er tilstrekkelig for å oppnå en gasstrømning i den ønskede retningen, dvs. fra tankanordningen til naturgassrørdistribusjonssystemet. If the gas provided by the pump device 40 is higher than the pressure of the natural gas pipe distribution system, gas will flow from the tank device to the natural gas pipe distribution system. The expression "a pressure higher than" or "a pressure slightly higher than" is therefore used here to describe the pressure that is sufficient to achieve a gas flow in the desired direction, i.e. from the tank device to the natural gas pipe distribution system.

Dermed øker pumpeanordningen 40 trykket fra omkring atmosfærisk trykk, som er trykket til LNG i tankanordningen 10, til et trykk som er minst lik trykket til naturgassrørdistribusjonssystemet 60 i ett trinn. Thus, the pump device 40 increases the pressure from approximately atmospheric pressure, which is the pressure of the LNG in the tank device 10, to a pressure that is at least equal to the pressure of the natural gas pipe distribution system 60 in one step.

Det skal bemerkes at i systemet i samsvar med oppfinnelsen er det kun behov for én pumpeanordning. Dermed kan den konvensjonelle lavtrykkspumpeanordningen 2 i fig. 2 erstattes av pumpeanordningen 40 i fig. 3. Videre kan dermed utjevningstanken hos det tidligere kjente systemet i fig. 1 utelates. Følgelig erstattes to pumpeanordninger og én utjevningstank med én pumpeanordning og dermed oppnås et enklere og mer kostnadseffektivt system. It should be noted that in the system according to the invention only one pumping device is needed. Thus, the conventional low-pressure pump device 2 in fig. 2 is replaced by the pump device 40 in fig. 3. Furthermore, the equalization tank of the previously known system in fig. 1 is omitted. Consequently, two pumping devices and one equalization tank are replaced with one pumping device and thus a simpler and more cost-effective system is achieved.

Det skal bemerkes at i beskrivelsen over er kun hovedkomponentene til systemet nevnt. En fagperson på området vil vite at et slikt system også vil bestå av rørledninger 71 for transport av LNG mellom pumpeanordningen og fordampingsanordningen, og det kan også bestå av rørledninger for transport av gass fra fordampingsanordningen 50 til naturgassrørdistribusjonssystemet 60. It should be noted that in the description above only the main components of the system are mentioned. A person skilled in the art will know that such a system will also consist of pipelines 71 for transporting LNG between the pumping device and the evaporation device, and it may also consist of pipelines for transporting gas from the evaporation device 50 to the natural gas pipe distribution system 60.

Videre kan systemet bestå av ventilanordninger (ikke vist) for styring av gasstrømmen i systemet, sensoranordninger og styringsanordninger for styring av fluidstrømmen gjennom systemet, og et gassmålings system for fiskal måling av gass som leveres fra regassifiseringsterminalen til naturgassrørdistribusjonssystemet. Furthermore, the system may consist of valve devices (not shown) for controlling the gas flow in the system, sensor devices and control devices for controlling the fluid flow through the system, and a gas measurement system for fiscal measurement of gas delivered from the regasification terminal to the natural gas pipe distribution system.

Claims (5)

1. LNG-regassifiseringssystem for forsyning av fordampet LNG til et naturgassrørdistribusjonssystem (60) med et trykk på mellom 50 og 100 bar, hvor systemet består av: en tankanordning (10) for oppbevaring av flytende naturgass ved eller så vidt over atmosfærisk trykk; en pumpeanordning (40), en fordampingsanordning (50) koblet mellom pumpeanordningen (40) og naturgassrørdistribusjonssystemet (60); hvor pumpeanordningen (40) er anbrakt i tankanordningen (10)r-)iog hvorkarakterisert vedat pumpeanordningen (40) er konfigurert til å øke trykket til LNG'en fra trykket i tankanordningen (10) til et trykk så vidt høyere enn trykket til naturgassrørdistribusjonssystemet (60).1. LNG regasification system for supplying vaporized LNG to a natural gas pipeline distribution system (60) with a pressure of between 50 and 100 bar, where the system consists of: a tank device (10) for storing liquid natural gas at or slightly above atmospheric pressure; a pumping device (40), an evaporation device (50) connected between the pumping device (40) and the natural gas pipe distribution system (60); where the pump device (40) is located in the tank device (10) and characterized in that the pump device (40) is configured to increase the pressure of the LNG from the pressure in the tank device (10) to a pressure slightly higher than the pressure of the natural gas pipe distribution system ( 60). 2. System i samsvar med krav 1 eller 2, hvor pumpeanordningen (40) er anbrakt nær bunnen av tankanordningen (10).2. System in accordance with claim 1 or 2, where the pump device (40) is placed near the bottom of the tank device (10). 3. System i samsvar med patentkrav 1, hvor tankanordningen er en sfærisk tank.3. System in accordance with patent claim 1, where the tank device is a spherical tank. 4. System i samsvar med patentkrav 1, hvor systemet videre omfatter røranordninger for transport av gass mellom pumpeanordningen og fordampingsanordningen, og fra fordampingsanordningen til naturgassrørdistribusjonssystemet (60).4. System in accordance with patent claim 1, where the system further comprises pipe devices for transporting gas between the pump device and the evaporation device, and from the evaporation device to the natural gas pipe distribution system (60). 5. System i samsvar med patentkrav 1, hvor systemet videre omfatter ventilanordninger for styring av strømmen i systemet.5. System in accordance with patent claim 1, where the system further comprises valve devices for controlling the flow in the system.
NO20100009A 2010-01-06 2010-01-06 LNG regasification system for supplying evaporated LNG to a natural gas distribution system NO331941B1 (en)

Priority Applications (2)

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NO20100009A NO331941B1 (en) 2010-01-06 2010-01-06 LNG regasification system for supplying evaporated LNG to a natural gas distribution system
PCT/NO2011/000003 WO2011084066A1 (en) 2010-01-06 2011-01-06 Lng re-gasification system for supplying vaporized lng to a natural gas piping distribution system

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