FIELD: technological processes.
SUBSTANCE: invention relates to method and device for removing nitrogen from cryogenic hydrocarbon composition. At least first part of cryogenic hydrocarbon composition is supplied into nitrogen desorption column. Nitrogen desorption column operates under desorption pressure. In nitrogen desorption column desorbing steam is supplied, containing at least stripping part of compressed process steam, which was produced from nitrogen-depleted fluid, in which pressure was released after its removal from nitrogen desorption column. Reverse irrigation is formed with participation of nitrogen desorption column head partially condensed steam by means of heat transfer from head steam to auxiliary coolant flow in amount of cooling efficiency. Exhaust gas consisting of non-condensed steam fraction from head steam, is removed. Cooling efficiency is adjusted to control of discharged steam fraction calorific capacity.
EFFECT: technical result is possibility of discharged steam fraction calorific capacity control.
20 cl, 2 dwg, 3 tbl
