FIELD: heating.
SUBSTANCE: invention refers to cryogenic equipment. Essence of the invention: in order to simultaneously obtain liquid oxygen and nitrogen, some part of waste gaseous nitrogen is compressed in a compressor after it leaves the cryogenic unit, and then, it is cooled and condensed in a heat exchanger due to cold of LNG with further throttling to the pressure close to pressure of nitrogen leaving the upper column, and vapours of nitrogen and some part of liquid nitrogen, which are formed, are directed to the heat exchanger of the main cryogenic unit, which allows required cooling of the air supplied to a rectification column.
EFFECT: improving cooling capacity and efficiency of a water separating plant.
1 dwg
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