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 pressure difference between main and distribution pipelines during gas withdrawal by several consumers. Claimed plant for production of liquefied natural gas includes gas drying and cleaning units, heat exchanger, separator, reducing device, as well as expander and compressor, connected to each other, at that on production gas line there are successively arranged compressor, refrigerator, first section of heat exchanger, a cleaning unit, a second heat exchanger section, an expander and a separator equipped with an LNG output line and a return gas line which is connected to the process gas line after the expander, forming a low pressure gas line on which the heat exchanger is located, note here that auxiliary cooler is arranged on process gas line upstream of expander and arranged on at least one auxiliary gas line with reduction device connected with high pressure gas line downstream of drying unit.

EFFECT: increased output of LNG due to reduced temperature of reduced production gas by optimization of heat exchange and possibility of gas withdrawal by several consumers at different pressures due to installation of auxiliary gas bleeding lines.

1 cl, 1 dwg