Natural gas liquefaction system of two inflations refrigeration technology

The utility model relates to a natural gas liquefaction system of two inflations refrigeration technology, its characterized in that: including precooling module, liquefaction module and subcooling module, the natural gas entry of the natural gas exit linkage liquefaction module of precooling module, the natural gas of the natural gas exit linkage subcooling module of liquefaction module enters the mouth, the subcooling refrigerant entry of the subcooling refrigerant exit linkage liquefaction module of subcooling module, the liquefaction refrigerant of the liquefaction refrigerant exit linkage precooling module of liquefaction module enters the mouth. Wherein, precooling module is arranged in carrying out the precooling for the refrigerant and the natural gas of liquefaction module to share partly liquefaction load, the liquefaction module is used for cooling off and liquefying for the natural gas to for providing cold, measures the refrigerant in the subcooling module, the natural gas that the subcooling module is after the liquefaction of liquefaction module continues the cooling. The utility model discloses the flexibility is strong, the energy consumption is low, easy through engineering approaches, can the natural gas liquefaction in -process of wide application in refrigeration and low temperature.