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Liquefaction method, liquefaction device, and floating liquefied gas production equipment comprising same

A liquefaction device and liquefied gas technology, applied in liquefaction, refrigeration and liquefaction, lighting and heating equipment, etc.

Active Publication Date: 2015-04-22
MITSUBISHI SHIPBUILDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, as a liquefaction device, although it is used in the reliquefaction of boil off gas of LNG ships, there is also room for application in the nitrogen expansion cycle of nitrogen refrigerants with poor liquefaction efficiency.

Method used

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  • Liquefaction method, liquefaction device, and floating liquefied gas production equipment comprising same
  • Liquefaction method, liquefaction device, and floating liquefied gas production equipment comprising same
  • Liquefaction method, liquefaction device, and floating liquefied gas production equipment comprising same

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Embodiment Construction

[0040] based on figure 1 , will describe a schematic configuration diagram of a floating liquefied gas production facility equipped with a liquefaction device according to an embodiment of the present invention.

[0041] Floating LNG manufacturing facility (Floating LNG: FLNG) 1 includes: multiple cargo tanks 2 for storing liquefied natural gas (liquefied gas); pre-processing device 3; liquefaction device (not shown); floating LNG manufacturing facility 1 A power supply device (not shown) for internally supplying electric power.

[0042] Floating liquefied natural gas manufacturing facility (floating liquefied natural gas manufacturing facility) 1 refines and liquefies raw gas (liquefied gas) that is ejected at high pressure from land or under the seabed to form liquefied natural gas (liquefied gas) as a product natural gas: LNG), and set on the ocean.

[0043] Cargo tanks (in this figure, only 3 are shown) 2 store LNG. Cargo tank 2 is a MOSS independent spherical tank.

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Abstract

Provided is a liquefaction method, a liquefying apparatus, and a floating liquefied-gas production facility equipped with the same, with which it is possible to suppress a decrease in liquefaction efficiency when gas to be liquefied is liquefied, to ensure safety, and to make the facility compact. Gas to be liquefied that has been subjected to heat exchange with a high-pressure heating medium composed of a single component is reduced in pressure, after which the gas to be liquefied that has been reduced in pressure is made to exchange heat with a low-temperature-side heating medium that is lower in temperature than and of the same type as the high-pressure heating medium.

Description

technical field [0001] The present invention relates to a liquefaction method, a liquefaction device and a floating liquefied gas manufacturing facility equipped with the liquefaction device, in particular to the liquefaction of natural gas. Background technique [0002] In general, as liquefaction facilities on land, gas to be liquefied is liquefied by a cascade refrigeration cycle or a refrigeration cycle using a mixed refrigerant of a plurality of refrigerants (for example, Patent Document 1). Regarding the installation place of this liquefaction facility, marine floating bodies have been discussed in recent years. When installing the same liquefaction equipment as on land on an ocean floating body, there are necessary conditions for marine use in consideration of anti-sway performance, installation space, ease of liquefaction, and safety. Therefore, although it is used for reliquefaction of the boil off gas of an LNG ship as a liquefaction facility, it also has room for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J1/00B63B35/44C10L3/06
CPCF25J1/0282F25J1/004F25J2230/20F25J1/0288F25J1/0254F25J1/005F25J2240/40B63B25/14F25J1/0265F25J1/0205F25J1/0072F25J1/0022F25J1/0278F25J2230/30F25J1/0207F25J1/023F25J1/0263F25J1/0267F25J2245/90F25J2270/16F25J2270/90B63B35/44C10L3/06F25J1/00
Inventor 冈胜
Owner MITSUBISHI SHIPBUILDING CO LTD
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