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Boil-off gas recovery system

A technology for evaporating gas and recovery systems, which is applied in the direction of transporting objects, fluid circulation arrangements, circuits or fluid pipelines, etc., and can solve problems such as inability to fully remove oil

Active Publication Date: 2018-08-07
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, liquid oil is captured by the filter, but gaseous oil is not captured by the filter, so the evaporated gas recovery system of Patent Document 1 cannot sufficiently remove the oil contained in the evaporated gas.
Therefore, the evaporated gas recovery system of Patent Document 1 has the problem of oil content mixing into the tank

Method used

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Examples

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Embodiment Construction

[0033] Hereinafter, various embodiments of the present invention will be described with reference to the drawings. However, for the convenience of description, each of the drawings referred to below simplifies the main components necessary for describing the boil-off gas recovery system according to each embodiment of the present invention. Therefore, the boil-off gas recovery system according to each embodiment of the present invention may include arbitrary components not shown in the drawings referred to in this specification.

[0034] figure 1 It is a schematic configuration diagram showing the evaporated gas recovery system 1 of the first embodiment. figure 2 It is a schematic configuration diagram showing the reliquefaction system 9 of the evaporated gas recovery system 1 according to the first embodiment. The evaporated gas recovery system 1 is installed on a ship transporting liquefied gas such as liquefied natural gas. The evaporated gas recovery system 1 includes ...

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Abstract

The invention provides a boil-off gas recovery system, which is not liable to cause interfusion of oil when recycling boil-off gas compressed by an oil supply type compressor. A boil-off gas recoverysystem includes a tank storing liquefied gas, an oil supply type compressor for compressing boil-off gas generated by partial evaporation of the liquefied gas in the tank, and a reliquefying system for liquefying the boil-off gas compressed by the oil supply type compressor and returning the liquefied gas that has been liquefied to the tank. The reliquefying system includes a heat exchanger for oil constituent condensation for cooling down the boil-off gas to a temperature equal to or lower than a condensation temperature of an oil constituent contained in the boil-off gas, a separator for separating the oil constituent condensed by the heat exchanger for oil constituent condensation from the boil-off gas, and a reliquefying portion for liquefying the boil-off gas from which the oil constituent is separated.

Description

technical field [0001] The present invention relates to a boil-off gas recovery system which recovers boil-off gas generated from a tank storing liquefied gas. Background technique [0002] In LNG carriers, boil-off gas is generated in tanks that store LNG. This evaporated gas is effectively used as fuel for engines, steam boilers, and generators in the ship, or is reliquefied and returned to the tank. In this manner, the evaporated gas recovery system described in Patent Document 1 is known as a technique for reliquefying the boil-off gas generated in the tank and returning it to the tank. [0003] The boil-off gas recovery system of Patent Document 1 compresses boil-off gas generated in a tank with an oil-feed compressor, reliquefies a part of the boil-off gas, and returns it to the tank. Here, since the boil-off gas compressed by the oil-feed compressor includes oil components composed of lubricating oil of the oil-feed compressor, the oil components may be mixed into t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B43/02F25B41/00F25B41/40
CPCF25B43/02F25B41/40F25J1/004F25J1/005F25J1/0202F25J1/023F25J1/0279F25J1/0297F25J1/0025B60P3/2245B60P3/228B60P3/30B60P1/36B60R16/033B65G37/00B65G33/10B65G2207/14B65G2201/04B65G2812/0577B60Y2200/146F25J2220/02
Inventor 手塚智志濑山胜广名仓见治
Owner KOBE STEEL LTD
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