Large distance offshore LNG export terminal with boil-off vapour collection and utilization capacities

摘要

Transfer system for cryogenic hydrocarbons, comprising an on shore or offshore hydrocarbon storage construction (1), an offshore mooring and transfer construction (6) for mooring a tanker (11), and at least one sub sea pipeline (4, 5) extending from a first pump (7, 8) on the storage construction to the offshore transfer construction (6), the transfer construction (6) comprising: - a vapour separation tank (10) connected to an outflow end (9) of the pipeline, the tank (10) comprising a supply line (13, 14) connectable to a tanker (11) for supplying liquid hydrocarbon to the tanker, a vapour return line (27) connectable to the tanker (11) for supplying vapour from the tanker to the separation tank (10), and a vapour transfer line (28, 33) connected to an offshore vapour receiving station (24, 32, 35, 37) for supplying vapour from the tank (10) to the receiving station, characterised in that, the vapour receiving station comprises any of the following components or any combination thereof: - a power plant (37) and a power cable (38) connected on one side to the power plant (37) and on the other side to an on shore and/or offshore facility (1), - a compressor (35) for compression of the gas and a gas transfer line (36) connected on one end to the compressor (35) and on the other end to an on shore or offshore facility (1) for supply of the compressed gas, and - a gas liquefaction device (32) connected via a liquefied gas line (34, 41) to any of the moored tanker (11), a storage member (40) for liquefied gas and the pipeline (4, 5), or any co mbinat ion thereof.