The present invention relates to a system to reliquefy boil-off gas (BOG), capable of raising liquefaction efficiency, and a vessel thereof. According to the present invention, the system comprises a liquefication unit using a mixed coolant to liquefy the BOG. The liquefication unit includes: a reliquefier exchanging heat between the BOG and the mixed coolant to liquefy the BOG; a mixed coolant compressor, which is a screw type using oil for sealing and lubrication, including a slide valve moving forward and backward by a slide piston to adjust the discharge pressure of the mixed coolant, and compressing the mixed coolant; and an oil processing unit separating the oil from the compressed mixed coolant to recirculate the mixed coolant to the mixed coolant compressor. The oil processing unit recirculates the oil to a screw and the piston slide piston.
본 발명은 증발가스 재액화 시스템 및 선박에 관한 것으로서, 혼합냉매를 이용하여 증발가스를 액화시키는 액화부를 포함하고, 상기 액화부는, 상기 증발가스를 상기 혼합냉매와 열교환시켜 액화하는 재액화기; 실링 및 윤활을 위해 오일을 사용하는 스크류 타입이고, 슬라이드 피스톤에 의해 전후 방향으로 이동하여 상기 혼합냉매의 토출 압력을 조절하는 슬라이드 밸브를 가지며 상기 혼합냉매를 압축하는 혼합냉매 압축기; 및 압축된 상기 혼합냉매에서 상기 오일을 분리해 상기 혼합냉매 압축기로 재순환시키는 오일 처리부를 포함하며, 상기 오일 처리부는, 상기 오일을 스크류 및 상기 슬라이드 피스톤으로 재순환시키는 것을 특징으로 한다.
liquefaction system of boil-off gas and ship having the same
증발가스 재액화 시스템 및 선박
2018-01-03
Patent
Elektronische Ressource
Koreanisch
IPC: | B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES / F25J LIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT , Verflüssigen, Verfestigen oder Trennen von Gasen oder Gasgemischen durch Druck- und Kältebehandlung |
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