| 摘要 |
<p>1. Technical Result Increase in technological process. 2. Essence A method for liquefying natural gas to produce a pressurized liquid product having a temperature above -112 DEG C comprises using two mixed refrigerants in two closed cycles, a low-level refrigerant to cool and liquefy the natural gas and a high-level refrigerant to cool the low-level refrigerant. After being used to liquefy the natural gas, the low-level refrigerant is warmed by heat exchange in countercurrent relationship with another stream of the low-level refrigerant and by heat exchange against a first stream of the high-level refrigerant, compressed to an elevated pressure, and aftercooled against an external cooling fluid. The low-level refrigerant is then cooled against a second stream of the high-level mixed refrigerant and by exchange against the low-level refrigerant. The second high-level refrigerant is also warmed by the heat exchange with the low-level refrigerant, compressed to an elevated pressure, and aftercooled against an external cooling fluid. 3. Field of Application Chemical technology. Table: 1</p> |
