公开(公告)号：US09759481B2

公开(公告)日：2017-09-12

申请号：US14269656

申请日：2014-05-05

Applicant: TECHNIP FRANCE

Inventor： Henri Paradowski ,  Sandra Thiebault ,  Loic Barthe

IPC: F25J3/02

CPC classification number: F25J3/0209 ,  F25J3/0233 ,  F25J3/0238 ,  F25J2200/02 ,  F25J2200/70 ,  F25J2200/76 ,  F25J2205/04 ,  F25J2210/04 ,  F25J2210/06 ,  F25J2230/24 ,  F25J2230/60 ,  F25J2235/60 ,  F25J2240/02 ,  F25J2245/02 ,  F25J2270/04 ,  F25J2270/06 ,  F25J2270/88 ,  F25J2290/80

Abstract: This method comprises cooling the feed natural gas in a first heat exchanger and introducing the cooled, feed natural gas into a first separation flask.It comprises the dynamic expansion of a turbine supply flow in a first expansion turbine and introducing the expanded flow into a separation column. This method comprises removing, at the head of the separation column, a head flow rich in methane and removing a first recirculation flow from the compressed head flow rich in methane.The method comprises forming at least a second recirculation flow obtained from the head flow rich in methane downstream of the separation column and forming a dynamic expansion flow from the second recirculation flow.