Reliquefaction Method For Boiled-Off Gas

• Main Authors: SUNG, HONG GUN, LEE, YEONG BEOM, CHO, JAE SUK, CHA, KYU SANG, KWON, YONG SOO, LEE, SANG GYU, CHO, BYOUNG HAK
• Format: Patent
• Language: English; Korean
• Published: 09.03.2017
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; EQUIPMENT FOR SHIPPING; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; MIXTURES BY PRESSURE AND COLD TREATMENT; PERFORMING OPERATIONS; REFRIGERATION OR COOLING; RELATED EQUIPMENT; SHIPS OR OTHER WATERBORNE VESSELS; STORING OF DISTRIBUTING GASES OR LIQUIDS; TRANSPORTING; VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES; WEAPONS

The present invention relates to an evaporation gas re-liquefaction method comprising: a compression step for compressing a first stream made of evaporation gas generated from a storage tank after passing the same through a first heat exchanger; a first cooling step for cooling the compressed first stream by introducing the same into the first heat exchanger and exchanging heat with the first stream before being compressed; a mixing step for mixing the first stream and a second stream made of liquefied gas to form a third stream; and a second cooling step for cooling the third stream in a second heat exchanger. According to an embodiment of the present invention, power consumption of a compressor while compressing an evaporation gas is able to be minimized and the temperature of the evaporation gas is able to be precisely controlled when re-liquefying the evaporation gas. 본 발명은 저장 탱크에서 발생된 증발가스로 이루어진 제1 스트림을 제1 열교환기를 통과시킨 후에 압축시키는 압축 단계와, 압축된 상기 제1 스트림을 상기 제1 열교환기로 유입시켜 압축되기 전의 상기 제1 스트림과 열교환을 통해 냉각시키는 제1 냉각 단계와, 상기 제1 스트림과 액화가스로 이루어진 제2 스트림이 혼합되어 제3 스트림을 형성하는 혼합 단계 및, 상기 제3 스트림을 제2 열교환기에서 냉각시키는 제2 냉각 단계를 포함하는 증발가스 재액화 장치에 관한 것이다. 본 발명의 일 실시예에 따르면, 증발가스를 재액화시, 증발가스를 압축시 압축기의 소모동력을 최소화시킬 수 있고, 증발가스의 온도를 정밀하게 제어할 수 있다.