NATURAL GAS LIQUEFACTION PROCESS

摘要

A liquefaction process according to the present invention is a natural gas liquefaction process of primarily cooling natural gas by heat exchange in a first heat exchange area using one closed loop refrigeration cycle applied with a mixed refrigerant and secondarily cooling the natural gas through heat exchange in a second heat exchange area. The process liquefies the natural gas by using one closed loop refrigerant cycle, thus the structure of the liquefaction process is simple and the liquefaction process is easily operated. The process cools the natural gas in each of two heat exchange areas after one stream is divided into multiple streams, thus not only has excellent efficiency of liquefaction process, but also has an advantage of being able to form various control strategies using divided streams. Moreover, the process does not use a pump, thus is characterized by not causing a problem of difficult operation of the liquefaction process caused by using a pump.