公开(公告)号：US20230375263A1

公开(公告)日：2023-11-23

申请号：US17745965

申请日：2022-05-17

申请人： GAS LIQUIDS ENGINEERING LTD.

发明人： WILLIAM STOTHERS ,  EUGENIUSZ GRYNIA ,  STUART MacKENZIE

IPC分类号： F25J3/02

CPC分类号： F25J3/0209 ,  F25J3/0238 ,  F25J3/0242 ,  F25J2200/06 ,  F25J2200/74 ,  F25J2200/72 ,  F25J2205/04 ,  F25J2215/62 ,  F25J2215/64

摘要： Gas processing methodology for high efficiency recovery of propane and/or ethane from a natural gas feed stream. The method is conducted without turboexpansion. A natural gas stream is processed to have gas and liquid portions. The gas portion is cooled and flows to a refluxed absorber column and the liquid portion flows to a lower pressure distillation column. Bottoms of the absorber column are depressurized directly into a lower pressure distillation column and the overhead vapor stream is used to cool the feed and/or reflux streams. The overhead vapour stream from the lower pressure distillation column split into at least two streams with one being depressurized into the absorber to provide reflux and the second passed into the absorber column to provide further reflux.