Process Description Feedstock – LNG is fed to pump 1 suction and then separated into two parts. The first part is sent to demethanizer 3, and the second, supplied by pump 2, is heated in demethanizer 3 and deethanizer 4, heat exchanger 5. Heat exchanger 5 is heated by an intermediate circulating heat transfer medium supplied from the source 6. Next, LNG pressure is reduced in the expander of unit 7 and it is fed into column 3 as vapor reflux. Deethanized NG is removed from column 3 overhead, compressed in the compressor of unit 7 and sent to the gas pipeline. From the bottom of column 3, the ethane-containing condensate is sent to column 4, where it is divided into an ethane fraction and LPG removed from the plant.
Process features
Use of a part of recovered LNG as a refrigerant for cooling the top of demethanizer and deethanizer
Possibility of using a combined heat and power plant as a heat source
Technical Specification
Pressure of regasified LNG 10 MPa
Temperature of regasified LNG 5–25 ºС
Ethane recovery up to 95 % , C3+ hydrocarbons up to 99.9 %