PLANT FOR LIQUEFIED NATURAL GAS PRODUCTION (VERSIONS) 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 at gas distribution stations. Plant includes a drying unit, a high pressure gas line, which is divided into a production gas line and a process gas line connected to the return gas line, forming a low pressure gas line with a preliminary heat exchanger, and production flow line is equipped with compressor connected to 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. Heat exchanger "compressed production gas / low pressure gas" and two-section heat exchanger "compressed production gas / reduced process gas" are successively installed on compressed production gas line with cleaning unit arranged between sections, after which the process gas line is connected to the return gas line downstream the main heat exchanger. Reducer is arranged as reducing device and connected with compressor. In compliance with second version, refrigerator is additionally fitted on compressed production gas line.

EFFECT: increased yield of liquefied natural gas.

2 cl, 2 dwg