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Patent Searching and Data


Title:
GAS-FREE METHOD AND GAS-FREE FACILITY
Document Type and Number:
WIPO Patent Application WO/2020/085329
Kind Code:
A1
Abstract:
Provided is a gas-free method which can reduce the burden on the environment. In this gas-free method, the inside of an LNG tank (80) is replaced with nitrogen gas, and then replaced with air. This gas-free method includes: an LNG vaporized gas discharge step for discharging LNG vaporized gas remaining inside the LNG tank (80) to outside the LNG tank (80); a heat exchange step for causing heat exchange between the LNG vaporized gas discharged in the LNG vaporized gas discharge step and liquid nitrogen in order to condense the LNG vaporized gas and vaporize the liquid nitrogen; and a nitrogen gas replacement step for replacing the inside of the LNG tank (80) with nitrogen gas by supplying the nitrogen gas vaporized in the heat exchange step to the LNG tank (80).

Inventors:
UWATOKO KATSUYA (JP)
OKA MASARU (JP)
Application Number:
PCT/JP2019/041381
Publication Date:
April 30, 2020
Filing Date:
October 21, 2019
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
B63B25/08; B63B25/16; B63J2/08; F17C13/00
Foreign References:
JPS5454096U1979-04-14
JP2014141155A2014-08-07
JPS5665092A1981-06-02
Attorney, Agent or Firm:
FUJITA, Takaharu (JP)
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