Title:
【発明の名称】加圧液化天然ガスに由来するボイルオフの再液化
Document Type and Number:
Japanese Patent JP2002528693
Kind Code:
A
Abstract:
A process is disclosed for reliquefying boil-off gas produced by pressurized liquid natural gas. In this process, refrigeration duty is provided to a heat exchanger by means of a refrigeration cycle. Pressurized natural gas is cooled by the heat exchanger and then expanded to a lower pressure to produce a liquid stream that is passed to a first phase separator. A boil-off vapor is passed through the heat exchanger and it is then compressed and cooled before being recycled back through the heat exchanger. The compressed, cooled boil-off gas is then expanded and passed to a second phase separator. A vapor stream produced by the second separator is removed from the process. A liquid stream produced by the second phase separator is passed to the first phase separator to produce a pressurized liquid having a temperature above about -112° C. and a pressure sufficient for the liquid to be at or below its bubble point.
Inventors:
Adapt Media Incorporated
Application Number:
JP2000578594A
Publication Date:
September 03, 2002
Filing Date:
October 22, 1999
Export Citation:
Assignee:
Exxon Mobil Upstream Research Company
International Classes:
F25B9/02; F25J1/02; F25B7/00; (IPC1-7): F25J1/02; F25B7/00; F25B9/02
Attorney, Agent or Firm:
Minoru Nakamura (9 outside)