Title:
【発明の名称】天然ガス液化のための二重多成分冷凍サイクル
Document Type and Number:
Japanese Patent JP2002532674
Kind Code:
A
Abstract:
A process is disclosed for liquefying natural gas to produce a pressurized liquid product having a temperature above -112° C. using two mixed refrigerants in two closed cycles, a low-level refrigerant to cool and liquefy the natural gas and a high-level refrigerant to cool the low-level refrigerant. After being used to liquefy the natural gas, the low-level refrigerant is (a) warmed by heat exchange in countercurrent relationship with another stream of the low-level refrigerant and by heat exchange against a first stream of the high-level refrigerant, (b) compressed to an elevated pressure, and (c) aftercooled against an external cooling fluid. The low-level refrigerant is then cooled by heat exchange against a second stream of the high-level mixed refrigerant and by exchange against the low-level refrigerant. The high-level refrigerant is warmed by the heat exchange with the low-level refrigerant, compressed to an elevated pressure, and aftercooled against an external cooling fluid.
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Inventors:
Kimble E Lawrence
Application Number:
JP2000588551A
Publication Date:
October 02, 2002
Filing Date:
December 17, 1999
Export Citation:
Assignee:
Exxon Mobil Upstream Research Company
International Classes:
F25B1/00; F25B1/10; F25J1/00; F25J1/02; F25J3/02; (IPC1-7): F25B1/00; F25B1/10; F25J3/02
Domestic Patent References:
| JPH02106689A | 1990-04-18 | |||
| JPS6050370A | 1985-03-20 | |||
| JP2002510382A | 2002-04-02 | |||
| JPH0559378A | 1993-03-09 |
Foreign References:
| FR1270952A | 1961-09-01 | |||
| GB1296696A | 1972-11-15 |
Attorney, Agent or Firm:
Minoru Nakamura (9 outside)