公开(公告)号：US20200208910A1

公开(公告)日：2020-07-02

申请号：US16233719

申请日：2018-12-27

Applicant: SUNG-IL ENCARE Co.,Ltd. ,  KOGAS-TECH ,  Korea Institute of Industrial Technology

Inventor： Jang-ik Park ,  TA KWAN WOO ,  TAEHEE KANG ,  HEESEUNG NA ,  HWEEUNG KWON ,  GAEHYUN NAM ,  Young Cheol Lee ,  Dong-Ha Lim

IPC: F25J1/00 ,  F25J1/02

Abstract: Provided are an apparatus and method for liquefying natural gas. The apparatus for liquefying natural gas includes a gas compressor configured to receive and compress the natural gas from a natural gas feed stream, a heat exchanging unit configured to cool a high-pressure natural gas passing through the gas compressor through heat exchange, an expansion valve configured to expand the cooled natural gas passing through the heat exchanging unit, a hold-up drum configured to phase-separate a gas-liquid mixture produced by passing through the expansion valve and divide the gas-liquid mixture into a liquefied natural gas and a cryogenic recycle gas having nitrogen content greater than that of the liquefied natural gas so as to discharge the liquefied natural gas and the cryogenic recycle gas, and a bypass line configured to provide the recycle gas discharged from the hold-up drum to the heat exchanging unit.

公开(公告)号：US11340013B2

公开(公告)日：2022-05-24

申请号：US16233719

申请日：2018-12-27

Applicant: SUNG-IL ENCARE Co., Ltd. ,  KOGAS-TECH ,  Korea Institute of Industrial Technology

Inventor： Jang-ik Park ,  Ta Kwan Woo ,  Taehee Kang ,  Heeseung Na ,  Hweeung Kwon ,  Gaehyun Nam ,  Young Cheol Lee ,  Dong-Ha Lim

IPC: F25J1/00 ,  F25J1/02

Abstract: Provided are an apparatus and method for liquefying natural gas. The apparatus for liquefying natural gas includes a gas compressor configured to receive and compress the natural gas from a natural gas feed stream, a heat exchanging unit configured to cool a high-pressure natural gas passing through the gas compressor through heat exchange, an expansion valve configured to expand the cooled natural gas passing through the heat exchanging unit, a hold-up drum configured to phase-separate a gas-liquid mixture produced by passing through the expansion valve and divide the gas-liquid mixture into a liquefied natural gas and a cryogenic recycle gas having nitrogen content greater than that of the liquefied natural gas so as to discharge the liquefied natural gas and the cryogenic recycle gas, and a bypass line configured to provide the recycle gas discharged from the hold-up drum to the heat exchanging unit.