公开(公告)号：US10760851B2

公开(公告)日：2020-09-01

申请号：US15901204

申请日：2018-02-21

Applicant: TECHNIP FRANCE

Inventor： Sandra Armelle Karen Thiebault ,  Vanessa Marie Stéphanie Gahier ,  Julie Anne Gouriou ,  Loïc Pierre Roger Barthe

IPC: F25J3/00 ,  F25J3/02

Abstract: A method comprising the cooling of the feed natural-gas (15) in a first heat exchanger (16) and the introduction of the cooled feed natural-gas (40) in separator flask (18). The method further comprising dynamic expansion of a turbine input flow (46) in a first expansion turbine (22) and the introduction of the expanded flow (102) into a splitter column (26). This method includes sampling at the head of the splitter column (26) a methane-rich head stream (82) and sampling in the compressed methane-rich head stream (86) a first recirculation stream (88). The method comprises the formation of at least one second recirculation stream (96) obtained from the methane-rich head stream (82) downstream from the splitter column (26) and the formation of a dynamic expansion stream (100) from the second recirculation stream (96).