Evaporation gas recycling system of LNG receiving station terminal

The utility model discloses an evaporation gas recycling system of an LNG receiving station terminal. The LNG receiving station terminal comprises an LNG storage tank, a BOG low-pressure compressor or an air blower is communicated with the LNG storage tank and used for compressing the evaporation gas produced in the LNG storage tank, the BOG low-pressure compressor or the air blower is communicated with a BOG/LNG heat exchanger, a high-pressure LNG output pipeline of the BOG/LNG heat exchanger is communicated with an LNG gasifier, a low-pressure LNG output pipeline of the BOG/LNG heat exchanger is communicated with the LNG storage tank, the LNG storage tank is communicated with an LNG conveying pipeline provided with a low-pressure pump and/or a high-pressure pump, and the output end of the LNG conveying pipeline is communicated with the BOG/LNG heat exchanger. The cooling capacity of the high-pressure liquefied natural gas normally with the pressure ranging from 7 MPaG to 10 MPaG is utilized for carrying out heat exchanging with the evaporation gas produced in a receiving station, and the evaporation gas is condensed into the liquefied natural gas and is finally recycled into the liquefied natural gas storage tank.