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

FIELD: cryogenics.

SUBSTANCE: invention relates to cryogenic equipment and can be used for production of liquefied natural gas (LNG) due to use of differential pressure between main and distribution pipelines. Claimed plant for liquefied natural gas production includes gas drying and cleaning units, preliminary and main heat exchangers, separator, first and second expanders and compressor, connected by means of electric and / or kinematic connection, at that on production gas line there are first compressor, first cooler, first section of preliminary heat exchanger, cleaning unit, second section of preliminary heat exchanger, main heat exchanger, first expander and separator equipped with LNG output line and return gas line with main heat exchanger, which is connected to process gas line after second expander, forming low pressure gas line on which preliminary heat exchanger is located, wherein the process gas line has a bypass line on which the refrigerating machine is mounted, and the low pressure gas line is connected to the process gas line by the circulating gas supply line, on which the second compressor and the second cooler are installed.

EFFECT: increased output of LNG due to optimization of heat exchange and provision of its constant due to equipment of installation with refrigerating machine and circulating compressor.

1 cl, 1 dwg