Vapor recovery system based on cold energy utilization in LNG receiving station

The utility model relates to a boil-off gas recovery system based on cold energy utilization in an LNG receiving station. The boil-off gas recovery system comprises a storage device; the output device is arranged in the liquid phase space of the storage device; a first inlet of the buffer tank is connected with the low-pressure pump; an inlet of the high-pressure pump is connected with an outlet of the buffer tank, and an outlet of the high-pressure pump is connected with a downstream natural gas pipeline network through an LNG high-pressure conveying pipeline, an LNG gasifier and a metering pry; an inlet of the BOG supercharging device is communicated with the gas phase space of the storage device; an inlet of a high-temperature medium pipe of the BOG condensing device is connected with an outlet of the BOG supercharging device, an outlet of the high-temperature medium pipe is divided into three paths, the first path is communicated with the liquid phase space of the storage device, the second path is connec