NATURAL GAS LIQUEFACTION SYSTEM AND METHOD USING THE SAME

摘要

A natural gas liquefaction system of the present invention comprises a pre-cooling unit, a gas and liquid separation unit, a first heat exchanging unit, a second heat exchanging unit, a first expansion unit, a second expansion unit, a first mixed refrigerant conversion unit, a pre-cooling refrigerant supplying unit, a natural gas supplying unit, and a mixer. A natural gas liquefaction method of the present invention comprises a first pre-cooling step (S01), a first mixed refrigerant separation step (S02), a first introduction step (S03), a first expansion refrigerant formation step (S04), a second introduction step (S05), a second expansion refrigerant formation step (S06), and a second freezing step (S07).