According to the present invention, disclosed is a boil-off gas (BOG) treatment system capable of effectively compressing BOG to re-liquefy the BOG. The BOG treatment system comprises: a compander receiving and compressing BOG generated in a liquefied natural gas (LNG) storage tank installed in a ship or a marine structure, and including an expander receiving the BOG to perform adiabatic expansion, and a compressor connected to the expander and compressing the BOG by an expansion force; a high duty (HD) compressor unit to additionally compress the BOG compressed in a BOG compressor of the compander; a precooler to cool the BOG compressed in the HD compressor unit by heat exchange with BOG introduced to the BOG compressor from the LNG storage tank; a main heat exchanger to cool the BOG compressed in the HD compressor unit by heat exchange with the BOG adiabatically expanded in the expander of the compander; and a fuel user installed in a vessel or a marine structure, and receiving, as fuel, the BOG compressed through at least a part of the HD compressor. The BOG cooled in the precooler after compressing in the HD compressor unit is introduced to the expander to be adiabatically expanded.
증발가스 처리 시스템이 개시된다. 본 발명의 증발가스 처리 시스템은, 선박 또는 해상 구조물에 마련된 LNG 저장탱크에서 발생하는 BOG(Boil-Off Gas)를 공급받아 압축하되, BOG를 공급받아 단열팽창시키는 익스팬더(expander)와 상기 익스팬더에 연결되며 팽창력에 의해 BOG를 압축하는 BOG 컴프레서(compressor)를 포함하여 구성되는 컴팬더(compander); 상기 컴팬더의 BOG 컴프레서에서 압축된 상기 BOG를 추가 압축하는 HD(High Duty) 컴프레서부; 상기 HD 컴프레서부에서 압축된 상기 BOG가, 상기 LNG 저장탱크로부터 상기 BOG 컴프레서로 도입될 BOG와 열교환으로 냉각되는 프리쿨러(precooler); 상기 HD 컴프레서부를 거쳐 압축된 상기 BOG가, 상기 컴팬더의 익스팬더로부터 단열팽창된 상기 BOG와 열교환으로 냉각되는 메인 열교환기; 및 상기 선박 또는 해상 구조물에 마련되며 상기 HD 컴프레서부의 적어도 일부를 거쳐 압축된 BOG를 연료로 공급받는 연료 소비처를 포함하되, 상기 HD 컴프레서부에서 압축 후 상기 프리쿨러에서 냉각된 상기 BOG는 상기 익스팬더로 도입되어 단열팽창되는 것을 특징으로 한다.
Boil Off Gas Treatment System
증발가스 처리 시스템
2016-12-01
Patent
Electronic Resource
Korean
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / 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 / 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 |
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