Title:
BOIL-OFF GAS RECOVERY SYSTEM
Document Type and Number:
Japanese Patent JP2016169837
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To perform an efficient recovery of boil-off gas at a liquefaction gas carrier and improve a degree of freedom in selection of a target ship speed.SOLUTION: BOG in a cargo tank 11 is sent as cooling side gas to a first heat exchanger 14 through a first piping 12 and further compressed at a multi-stage high pressure gas compressor 15. Middle pressure BOG with a pressure more than a critical point is extracted from a middle stage of the high pressure gas compressor 15, transported as cooled side gas to the first heat exchanger 14 through a second piping 16 and cooled. BOG is further cooled with a re-cooling device 24, expanded by a Joule-Thomson valve 17 and liquefied. The liquefied BOG and gas-liquid double phase flow of gas gasified through flash are transferred to a separator 18. Gas composition separated by the separator 18 is returned back an upstream side of the first heat exchanger 14 at the first piping 12 through a pressure adjustment valve 19, liquid composition is returned back to the cargo tank 11 through a transfer pump 21.SELECTED DRAWING: Figure 1
Inventors:
YUASA SHINYA
WATANABE TAKASHI
WATANABE TAKASHI
Application Number:
JP2015051266A
Publication Date:
September 23, 2016
Filing Date:
March 13, 2015
Export Citation:
Assignee:
MITSUI SHIPBUILDING ENG
International Classes:
F17C13/00; B63B25/16; F02M21/02; F25J1/00
Domestic Patent References:
| JP2015505941A | 2015-02-26 | |||
| JP2012083051A | 2012-04-26 | |||
| JP2014512474A | 2014-05-22 | |||
| JPS4988904A | 1974-08-26 | |||
| JP2014234927A | 2014-12-15 | |||
| JPS6262100U | 1987-04-17 |
Attorney, Agent or Firm:
Takashi Matsuura
Hiroki Ogura
Hiroki Ogura