FIELD: heat exchange; gas industry.
SUBSTANCE: disclosed is an apparatus for producing liquefied natural gas, comprising gas drying and cleaning units, a heat exchanger, a separator, a reducing device, as well as an expander and a compressor, connected to each other, where on the production gas line are successively arranged a first compressor, connected to an expander, a first cooler, first section of heat exchanger, cleaning unit, second section of heat exchanger, reducing device and separator, equipped with liquefied natural gas output line and return gas line, which is connected to process gas line after expander, with formation of low pressure gas line, on which heat exchanger is located, wherein on the process gas line a bypass line is made, on which the refrigerating machine is installed, and the low pressure gas line is connected to the process gas line to the expander with a circulating gas supply line, on which the second compressor and the second cooler are installed.
EFFECT: technical result is increased output of LNG due to optimization of heat exchange and provision of constant output due to equipping of unit with refrigerating machine and circulating compressor.
1 cl, 1 dwg
