PLANT FOR PRODUCING LNG 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. Proposed LNG production unit includes gas drying and cleaning units, preliminary and main heat exchangers, separator and compressor connected by means of electric and / or kinematic connection, wherein on the production gas line the compressor, refrigerator, the first section of the preliminary heat exchanger, the cleaning unit, second section of preliminary heat exchanger, main heat exchanger, first expander and separator equipped with output line LNG 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 the preliminary heat exchanger is located, at that on the process gas line before the second expander there is an auxiliary cooler located also on at least one line of auxiliary gas with the expander connected to the high pressure gas line after the drying unit.

EFFECT: increased yield 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 bleed lines.

1 cl, 1 dwg