INSTALLATION FOR GAS REDUCTION AND PRODUCTION OF LIQUEFIED NATURAL GAS (VERSIONS) Russian patent published in 2020 - IPC F25J1/00 

FIELD: cryogenics.

SUBSTANCE: invention can be used for liquefaction of natural gas at gas-distributing stations. Plant includes drying and cleaning units, a heat exchanger, a compression refrigerating machine with two evaporators, a cooler, an expander, two reducing devices and a separator. High-pressure dried natural gas line is divided into auxiliary gas line, main and auxiliary process gas lines and production gas line, on which the first heat exchanger section, the cleaning unit, the second section of the heat exchanger, the reducing device and the separator, equipped with the LNG outlet line and the return gas line are sequentially located. Main process gas line comprises first evaporator, connection with auxiliary process gas line, expander and connection with return gas line, and a low-pressure line formed by said lines is provided with a heat exchanger. Cooler is also located on the auxiliary gas line equipped with the second reducing device and the second evaporator.

EFFECT: technical result is increased output of LNG and possibility of gas withdrawal by several consumers at different pressures.

4 cl, 4 dwg