Global Patent Index - EP 3701206 A1

EP 3701206 A1 20200902 - NATURAL GAS LIQUEFACTION BY A HIGH PRESSURE EXPANSION PROCESS USING MULTIPLE TURBOEXPANDER COMPRESSORS

Title (en)

NATURAL GAS LIQUEFACTION BY A HIGH PRESSURE EXPANSION PROCESS USING MULTIPLE TURBOEXPANDER COMPRESSORS

Title (de)

ERDGASVERFLÜSSIGUNG DURCH EIN HOCHDRUCKEXPANSIONSVERFAHREN UNTER VERWENDUNG MEHRERER TURBOEXPANDERKOMPRESSOREN

Title (fr)

LIQUÉFACTION DE GAZ NATUREL PAR UN PROCÉDÉ D'EXPANSION À HAUTE PRESSION UTILISANT DE MULTIPLES COMPRESSEURS DE TURBODÉTENDEUR

Publication

EP 3701206 A1 (EN)

Application

EP 18792623 A

Priority

  • US 201762576989 P
  • US 2018053144 W

Abstract (en)

[origin: US2019120548A1] A method and system for liquefying a feed gas stream including natural gas. The feed gas stream is provided at a pressure less than 1,200 psia. A refrigerant stream having a pressure of at least 1,500 psia is cooled and then expanded in a first expander to an intermediate pressure. The first expander is mechanically coupled to a first coupled compressor to together form a first turboexpander-compressor. The refrigerant stream is expanded in a second expander, which is mechanically coupled to a second coupled compressor to together form a second turboexpander-compressor. The refrigerant stream cools the feed gas stream in one or more heat exchangers. Using the second coupled compressor and a first driven compressor, the refrigerant stream is compressed to a discharge pressure within 300 psia of the intermediate pressure. The refrigerant stream is compressed using the first coupled compressor and is further compressed to provide the refrigerant stream.

IPC 8 full level

F25J 1/00 (2006.01); F25J 1/02 (2006.01)

CPC (source: EP US)

F25J 1/0022 (2013.01 - EP US); F25J 1/004 (2013.01 - US); F25J 1/0042 (2013.01 - EP US); F25J 1/0045 (2013.01 - EP); F25J 1/005 (2013.01 - EP US); F25J 1/0072 (2013.01 - EP US); F25J 1/0082 (2013.01 - EP US); F25J 1/0205 (2013.01 - EP); F25J 1/0208 (2013.01 - EP); F25J 1/025 (2013.01 - EP US); F25J 1/0254 (2013.01 - US); F25J 1/0288 (2013.01 - EP US); F25J 2210/06 (2013.01 - EP); F25J 2220/62 (2013.01 - EP US); F25J 2230/20 (2013.01 - EP); F25J 2230/30 (2013.01 - US); F25J 2245/90 (2013.01 - EP); F25J 2270/16 (2013.01 - EP)

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

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

US 2019120548 A1 20190425; AU 2018354587 A1 20200423; CA 3079890 A1 20190502; EP 3701206 A1 20200902; WO 2019083676 A1 20190502

DOCDB simple family (application)

US 201816144581 A 20180927; AU 2018354587 A 20180927; CA 3079890 A 20180927; EP 18792623 A 20180927; US 2018053144 W 20180927