GAS REDUCTION AND LNG GENERATION PLANT Russian patent published in 2021 - IPC F25J1/00 

FIELD: cryogenic technology.

SUBSTANCE: invention relates to cryogenic technology and can be used for the liquefaction of natural gas at gas distribution stations. The invention relates to an installation for reducing gas and producing liquefied natural gas (LNG), which includes gas drying and purification units, preliminary and main heat exchangers, a separator, expanders and a compressor, connected to each other. The compressor of the refrigeration machine is installed as a compressor, the high-pressure dehumidified natural gas line is divided into at least one auxiliary gas line, the main and auxiliary process gas lines, and the production gas line, in which the first pre-heat exchanger section, the purification unit, the second pre-heat exchanger section, the main heat exchanger, the first expander and the separator, equipped with an LNG output line and a return gas line with the main heat exchanger, are sequentially located. In the main process gas line, the first evaporator of the refrigerating machine, the second expander and connections to the return gas line after the main heat exchanger and to the auxiliary process gas line equipped with an auxiliary refrigerator and a third expander are located, and in the low-pressure gas line formed by these lines, the preliminary heat exchanger is located. The auxiliary refrigerator is also located in at least one auxiliary gas line equipped with an auxiliary expander and a second evaporator of the refrigerating machine.

EFFECT: increase in the LNG output and the possibility of gas extraction by several consumers at different pressures.

1 cl, 1 dwg