公开(公告)号：US20190310013A1

公开(公告)日：2019-10-10

申请号：US16315115

申请日：2017-06-20

Applicant: SAIPEM S.P.A.

Inventor： Eric ZIELINSKI ,  Nathalie TRICHARD ,  Julien BELLANDE ,  Benjamin RODIER

IPC: F25J1/00 ,  F25J1/02

Abstract: A process for liquefying a natural gas comprising a mixture of hydrocarbons predominating in methane, the process comprising a first semi-open refrigerant cycle with natural gas in which any natural gas liquids that have condensed are separated from the natural gas feed stream, which stream then passes through a main cryogenic heat exchanger (4) in order to contribute by heat exchange to pre-cooling a main natural gas stream (F-P) and to cooling an initial refrigerant gas stream (G-0), a second semi-open refrigerant cycle with natural gas for contributing to pre-cooling the natural gas and the refrigerant and also to liquefying the natural gas, and a closed refrigerant cycle with refrigerant gas for subcooling the liquefied natural gas and for delivering refrigeration power in addition to the other two cycles. The invention also provides a natural gas liquefaction installation for performing such a process.