FIELD: gas industry.
SUBSTANCE: invention relates to gas industry, specifically, to production of liquefied natural gas and compressed natural gas at gas distribution stations (GDS). Natural gas flow from the main gas line is directed to booster compressor at the outlet of which natural gas low-pressure stream is heated and supplied to consumer in gas-distributing network. High-pressure natural gas stream is passed through the first heat exchange apparatus, cooled and dried, after which this stream is divided into two streams: the first flow is directed to the consumer, and the second flow is directed to liquefaction as a product flow. Product flow is cleaned, cooled in heat exchangers and in an additional heat exchanger with an external coolant fed from the refrigerating machine and passed through a choke to produce a vapor-liquid mixture, from which the liquid phase is separated and directed to the consumer. Back flow is generated from vapor phase, heated and supplied to gas distribution network. Stream of high-temperature heat carrier is heated, which is heated in the first heat exchanger and directed to a cleaning unit for adsorbent heating. Flow of natural gas of low pressure from booster-compressor before supply into gas-distributing network is heated by reverse flow in three-flow heat exchanger of preliminary cooling or in heat exchanger-waste heat exchanger.
EFFECT: high reliability and simple process.
3 cl, 2 dwg
