FIELD: gas industry.
SUBSTANCE: group of inventions relates to gas processing industry. Natural gas liquefaction complex comprises units for complex purification, compression, liquefaction and gas power plant unit. Liquefaction unit comprises inert gas removal module, throttle-ejector, throttle valve, throttle flap, phase separator and two counterflow heat exchangers, between which auxiliary heat exchange apparatus is connected, connected to unit of refrigerating machine. At the outlet of the second counter-flow heat exchanger from the pipeline of direct flow the pipeline is connected, which is connected to the input of the throttle valve and at the outlet from the liquefaction unit through the mixer it is connected to the input of the compression unit. Reverse flow pipeline is connected to the output of the phase separator and, when it leaves the liquefaction unit, is divided into two branches: the first branch is connected to the input of the compression unit, and the second branch is connected to the inlet of the gas power station unit. A branch connected to the inlet of the rectification column of the inert gas removal module branches from the return flow pipeline at the output of the phase separator. An additional branch is connected from the pipeline with a liquid phase before the throttle flap, which is connected through the condenser to the rectification column.
EFFECT: as result, 100 % liquefaction of natural gas, higher quality of production LNG.
2 cl, 2 dwg
