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 liquefaction of natural gas at gas distribution stations. Plant for production of liquefied natural gas includes a high-pressure gas line with a drying unit, which is divided into a production gas line and a process gas line with a preliminary heat exchanger and an expander. Production flow line is equipped with a cleaning unit, the main heat exchanger, a reducing device and a separator with lines for supply of return gas and LNG outlet. Compression refrigerating machine evaporator, cleaning unit and "cooled production gas / reduced process gas" evaporator are installed on production gas line. After the main heat exchanger the return gas line is connected to the separation gas supply line, and also connected by a supply line of a portion of return gas, on which a heater is located, with cleaning and drying units, which are connected by lines of supply of regeneration gases with a line of reduced process gas after a preliminary heat exchanger, forming a low-pressure gas discharge line. LNG outlet line accommodates second reduction device and second separator equipped with lines for LNG output to consumer and separation gas supply to line of reduced process gas with compressor. Compressor and refrigerating machine are connected with expander.

EFFECT: increased yield of liquefied natural gas.

1 cl, 1 dwg