Ship-to-ship transfer system based on shore-based liquefied natural gas receiving station

Abstract

Disclosed is a ship-to-ship transfer system based on a shore-based liquefied natural gas receiving station. The ship-to-ship transfer system based on the shore-based liquefied natural gas receiving station comprises a ship unloading arm L1, a ship unloading gaseous-phase return arm V1, a ship loading arm L2, a ship loading gaseous-phase return arm V2, an LNG storage tank T, a cold circulating pump P1, a ship loading pump P2, a volatile gas compressor C, a ship loading pipeline, a ship unloading pipeline, a volatile gas pipeline, a ship unloading gaseous-phase return pipeline, a ship loading gaseous-phase return pipeline, a cold circulating crossing line and a transfer crossing line. A ship unloading pipeline stop valve XV-3 is arranged on the ship unloading pipeline, and a ship loading pipeline stop valve XV-4 is arranged on the ship loading pipeline. A ship unloading gaseous-phase return pipeline stop valve XV-1 and a ship unloading gaseous-phase return pipeline pressure control valve CV-1 are arranged on the ship unloading gaseous-phase return pipeline. A ship loading gaseous-phase return pipeline stop valve XV-2 and a ship loading gaseous-phase return pipeline pressure control valve CV-2 are arranged on the ship loading gaseous-phase return pipeline. A cold circulating crossing line stop valve XV-5 is arranged on the cold circulating crossing line. A cold circulating pump outlet stop valve XV-6 is arranged in an outlet of the cold circulating pump P1. A ship loading pump outlet stop valve XV-7 is arranged in an outlet of the ship loading pump P2.

Description

technical field

[0001] The invention relates to the field of unloading, storage and gasification of liquefied natural gas, in particular to a ship-to-ship transfer system based on a shore-based liquefied natural gas receiving station. Background technique

[0002] Traditional liquefied natural gas receiving station loading and transshipment mainly adopts "unloading-storage-loading" operation, and the specific process is as follows:

[0003] (1) The incoming gas is discharged into the LNG storage tank of the receiving station through the unloading pipeline of the unloading dock;

[0004] (2) The incoming ship gas and storage gas are mixed and stored in the storage tank;

[0005] (3) The mixed loading gas is loaded and transshipped by the pump in the tank through the loading dock or reversely through the unloading dock.

[0006] Among them, the above-mentioned inbound gas, stored gas and onboard gas are referred to as abbreviations, and they actually refer to inbound LNG, st...

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