System for large -scale LNG accepting station utilizes liquefied natural gas cold energy generation

The utility model discloses a system for large -scale LNG accepting station utilizes liquefied natural gas cold energy generation, the independent heat transfer passageway of three groups has in the main heat exchanger, the exit end of stating first heat transfer passageway is connected with liquefied natural gas pipe and natural gas pipe respectively, the exit end and the mixed working medium buffer tank of second heat transfer passageway are connected, it is connected with mixed working medium booster pump to mix the exit end of working medium buffer tank, mix the exit end of working mediumbooster pump and the inlet connection of third heat transfer passageway, the exit end of third heat transfer passageway is connected with mixed working medium heater, mix the exit end of working medium heater and the entrance point of expander, the exit end of expander is connected with the entrance point of second heat transfer passageway, the expander is connected with the generator, adopt the low temperature rankine cy