FIELD: gas industry.
SUBSTANCE: liquefied natural gas production system includes a heat exchanger configured to perform heat exchange between the coolant flow and natural gas flow, for evaporation of the flow of the natural gas flow condensation stream; natural gas compressor, natural gas cooler for cooling compressed natural gas stream to temperature close to ambient temperature, and a natural gas expander for expansion of natural gas after cooling. Natural gas expander is connected to at least one heat exchanger for supply of natural gas to the expander. Heat exchanger comprises a first heat exchanger and further comprises a second heat exchanger configured to cool a stream of natural gas before natural gas flow compression in natural gas compressor or compressed natural gas flow before cooling of compressed natural gas flow in natural gas cooler.
EFFECT: technical result is higher efficiency of cooling agent cleaning.
18 cl, 11 dwg
