BOG recondenser and LNG storage system equipped with the same

摘要

The problem to be solved is to provide a BOG recondenser for recondensing the BOG of LNG with high heat exchange efficiency, while removing nitrogen in the BOG of NG and without using a compressor. Solution: The BOG recondenser 1 has an LNG buffer tank 12, a first condenser 111, and a second condenser 211. The first (condenser 111) has a first heat exchanger (112). The second condenser 211 has a second heat exchanger 212. The BOG produced in the LNG buffer tank 12 is recondensed by heat exchange with a coolant in the first heat exchanger 112. BOG, which has not yet been recondensed, is introduced to the second condenser 211. A portion of the BOG introduced into the second condenser 211 is recondensed by the second heat exchanger 212 and returned to the LNG buffer tank 12. In the second heat exchanger 212, at least a portion of the coolant that exchanges heat with BOG in the second condenser 211 also exchanges heat with the BOG in the first condenser 111 in the first heat exchanger 112. do.