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    • 20. 发明专利
    • Utilizing method of boil-off gas in lng carrying ship
    • LNG运输船舶中的废气利用方法
    • JPS5957094A
    • 1984-04-02
    • JP16913482
    • 1982-09-27
    • Hitachi Zosen Corp
    • KATSURA YUTAKAABIKO REIICHIROUEGUCHI YOSHIMASASATOU SUSUMU
    • B63H21/38B63B25/16B63J3/04B63J99/00F17C9/04
    • B63J99/00B63J2099/003F17C9/04F17C2205/0323F17C2221/011F17C2221/013F17C2221/014F17C2221/031F17C2221/033F17C2223/0123F17C2223/0161F17C2227/0157F17C2265/015F17C2265/03F17C2265/037Y02T70/5263
    • PURPOSE:To utilize the potential cold heat of boil-off gas, by a method wherein compressed air is separated into liquid oxygen and nitrogen gas by means of boil-off gas to utilize the liquid oxygen and the nitrogen gas for combustion and seal gas, respectively. CONSTITUTION:Boil-off gas 11 generated from an LNG tank 10 is boosted by a compressor 12, and is burnt in a boiler 14 after passing through a heat exchanger 13. The open air compressed by a compressor 20 is cooled by a flushing tower 21, and a freon cooler 22, and is freed from moisture content and carbon dioxide gas by an adsorbing tower 23. The open air precooled through a heat exchanger 24 is cooled to the liquefying temperature of oxygen by the heat exchanger 13, and is separated into liquefied oxygen 25 and nitrogen gas 26. The liquefied oxygen passing through an expansion valve 28 is fed to the boiler 14 while precooling the open air through the heat exchanger 24. As noted above, the potential cold heat of boil-off gas can be utilized for separation of the compressed air into the liquefied oxygen and the nitrogen gas.
    • 目的:为了利用蒸发气体的潜热,通过利用蒸发气体将压缩空气分离成液氧和氮气以利用液氧和氮气燃烧和密封气体的方法, 分别。 构成:从LNG罐10产生的蒸发气体11由压缩机12升压,并在通过热交换器13之后在锅炉14中燃烧。由压缩机20压缩的开放空气由冲洗塔21 和氟利昂冷却器22,并且通过吸附塔23从水分含量和二氧化碳气体中除去。通过热交换器24预冷却的开放空气通过热交换器13冷却至氧气的液化温度,并分离成 液化氧气25和氮气26.通过膨胀阀28的液化的氧气被供给到锅炉14,同时通过热交换器24对露天空气进行预冷却。如上所述,可以利用蒸发气体的潜在冷热 用于将压缩空气分离成液化的氧气和氮气。