FIELD: heating.
SUBSTANCE: in the method of liquefying a stream reached in hydrocarbons, liquefaction is carried out in a cascade of loops with a coolant, consisting of three refrigeration circuits. The first of the three refrigeration circuits serves to provide preliminary cooling, the second refrigeration circuit is to provide factual liquefaction and the third refrigeration circuit is for guaranteeing supercooling of the liquefied flow, enriched by hydrocarbons. Each refrigerator circuit includes at least one single-step or multi-step compressor. At least part of the flow of the coolant from the second refrigeration circuit is used for cooling the specified flow, enriched by hydrocarbons, to ensure the preliminary cooling of the flow to a temperature, under which the liquefaction of C3-components begins, such that each compressor has an equal share of the load.
EFFECT: increase in the productivity of the installation for liquefaction of gas.
22 cl, 6 dwg, 3 tbl
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