PLANT FOR PRODUCTION OF LIQUEFIED NATURAL GAS Russian patent published in 2019 - IPC F25J1/00 

FIELD: gas industry.

SUBSTANCE: invention relates to cryogenic equipment and can be used for production of liquefied natural gas at gas-distributing stations due to use of pressure difference between main and distributing pipelines. Plant for liquefied natural gas production includes a drying unit, a high pressure gas line which is divided into a production gas line and a process gas line which is equipped with a preliminary heat exchanger and an expander and is connected to a return gas line forming a low pressure gas line with a preliminary heat exchanger. Production flow line is equipped with compressor connected with expander, cleaning unit, main heat exchanger, reducing device and separator with lines of return gas and LNG drain. Dehydration unit is located on high pressure gas line. On the production gas line downstream the compressor there is a heat exchanger "compressed production gas/gas of low pressure" and a two-section heat exchanger "compressed production gas/reduced process gas", between sections of which there is a cleaning unit. Process gas line is connected to the return gas line downstream the main heat exchanger.

EFFECT: technical result is increased output of liquefied natural gas and reduced metal consumption of equipment.

1 cl, 1 dwg