EP 2724100 B1 20201202 - METHOD FOR LIQUEFYING NATURAL GAS WITH A TRIPLE CLOSED CIRCUIT OF COOLANT GAS
Title (en)
METHOD FOR LIQUEFYING NATURAL GAS WITH A TRIPLE CLOSED CIRCUIT OF COOLANT GAS
Title (de)
VERFAHREN ZUR VERFLÜSSIGUNG VON ERDGAS MIT EINEM GESCHLOSSENEN DREIFACH-KÜHLGASKREISLAUF
Title (fr)
PROCÉDÉ DE LIQUÉFACTION DE GAZ NATUREL A TRIPLE CIRCUIT FERME DE GAZ RÉFRIGÉRANT
Publication
Application
Priority
- FR 1155595 A 20110624
- FR 2012051428 W 20120622
Abstract (en)
[origin: WO2012175889A2] The present invention relates to a method for liquefying a natural gas primarily including methane, in which said natural gas to be liquefied is liquefied by performing the following concomitant steps: (a) circulating said natural gas to be liquefied that is circulating in three heat exchangers which are mounted in series and in which the gas is cooled to T3, T3 being no higher than the liquefaction temperature of said natural gas at atmospheric pressure; (b) the closed-circuit circulation of at least: a first stream of coolant gas at a pressure P1 that is lower than P3, which is entering the third exchanger and leaving said first exchanger, said first stream being obtained by expanding, in a first expansion valve, a first portion of said second stream to P3, which is higher than P2, said second stream circulating parallel to said stream of natural gas while entering said first exchanger and leaving said second exchanger; and a third stream at a pressure P2 higher than P1 and lower than P3 circulating parallel to said first stream which is entering said second exchanger and exiting said first exchanger, and which is obtained by expanding, in a second expansion valve, a second portion of said second stream exiting said first exchanger; and (c) said second stream of coolant gas at the pressure P3, which is obtained by compression by means of at least two first and second compressors arranged in series and coupled to said first and second expansion valves.
IPC 8 full level
CPC (source: EP US)
F25J 1/0022 (2013.01 - EP US); F25J 1/0025 (2013.01 - EP); F25J 1/005 (2013.01 - EP US); F25J 1/0072 (2013.01 - EP US); F25J 1/0097 (2013.01 - EP US); F25J 1/0204 (2013.01 - EP US); F25J 1/0212 (2013.01 - EP US); F25J 1/0254 (2013.01 - EP US); F25J 1/0283 (2013.01 - EP US); F25J 1/0284 (2013.01 - US); F25J 1/0285 (2013.01 - US); F25J 1/0287 (2013.01 - EP US); F25J 1/0288 (2013.01 - EP US); F25J 1/0289 (2013.01 - US); F25J 2230/20 (2013.01 - EP); F25J 2230/22 (2013.01 - US); F25J 2270/14 (2013.01 - US); F25J 2270/16 (2013.01 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
FR 2977015 A1 20121228; FR 2977015 B1 20150703; AU 2012273829 A1 20131219; AU 2012273829 B2 20160526; AU 2012273829 C1 20170316; BR 112013033341 A2 20170131; BR 112013033341 B1 20210209; CY 1124080 T1 20220527; DK 2724100 T3 20210215; EP 2724100 A2 20140430; EP 2724100 B1 20201202; ES 2854990 T3 20210923; HR P20210341 T1 20210430; HU E053378 T2 20210628; PT 2724100 T 20210218; RS 61507 B1 20210331; SI 2724100 T1 20210430; US 2014190205 A1 20140710; US 9557101 B2 20170131; WO 2012175889 A2 20121227; WO 2012175889 A3 20131114; WO 2012175889 A4 20140103
DOCDB simple family (application)
FR 1155595 A 20110624; AU 2012273829 A 20120622; BR 112013033341 A 20120622; CY 211100145 T 20210222; DK 12731601 T 20120622; EP 12731601 A 20120622; ES 12731601 T 20120622; FR 2012051428 W 20120622; HR P20210341 T 20210301; HU E12731601 A 20120622; PT 12731601 T 20120622; RS P20210238 A 20120622; SI 201231880 T 20120622; US 201214127910 A 20120622