LIQUEFACTION METHOD OF NATURAL GAS FOR ENERGY REDUCTION

摘要

PURPOSE: A natural gas liquefying method for reducing energy by heat exchanging with the natural gas is provided to re-heat exchange the natural gas. CONSTITUTION: A natural gas liquidation method for reducing energy uses a pretreatment process unit(100), a heat exchange unit and a mixed refrigerant circulation unit(300). The pretreatment process unit removes impurities among provided natural gas, and cools the natural gas by heat exchange with propane. The heat exchange unit cools the pre-processed natural gas by heat exchange with the mixed-refrigerant to liquefy. The mixed-refrigerant circulation unit circulates the mixed-refrigerant to the heat exchange unit to liquefy the natural gas which passes through the heat exchange unit.