FIELD: gas industry.
SUBSTANCE: invention relates to gas industry. Natural gas liquefaction complex at gas distribution stations (GDS) is connected to a main gas line and comprises a cryogenic unit made in the form of interconnected liquefaction units with possibility of disconnection and/or connection of these units. Complex also contains filtration, dehydration, demercurization and gas cleaning units, turbo-expander-electric generators and power supply units, vapour recovery unit and storage unit. Pipeline of natural gas supply after passing the filtration, drying and demercurization units is divided into two: a production flow pipeline and a pipeline of an expander flow. Cryogenic unit consists of three liquefaction units, each of which contains heat exchange devices, a production separator and a unit for low-temperature separation of the natural gas production stream. All units of the turbine expander-electric generators are connected to inputs of the power supply unit, and their number corresponds to the number of liquefaction units in the cryogenic unit.
EFFECT: technical result of invention is improvement of reliability and quality of liquefied natural gas.
1 cl, 1 dwg
