PLANT FOR PRODUCTION OF LIQUEFIED NATURAL GAS (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. Proposed plant comprises high-pressure line including desiccation unit to be separated into production gas line and process gas line. Process gas line is equipped with a preliminary heat exchanger and an expander and is connected to a return gas line forming a low pressure gas line. 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. Heat exchanger "liquefied natural gas/low pressure gas" is installed on the line of compressed production gas. After the cleaning unit the heat exchanger "clean liquefied natural gas/reduced process gas" is arranged, after which the process gas line is connected to the reverse gas line after the main heat exchanger. Expander is arranged as reducing device and connected with compressor. According to the second version of the invention, a refrigerator is installed on the compressed production gas line.

EFFECT: increased yield of liquefied natural gas.

2 cl, 2 dwg