FIELD: power industry.
SUBSTANCE: when implementing the method of low-temperature separation of initial mass flow (1) which consists mainly of hydrogen, methane and heavy hydrocarbons, gas fraction (33) extracted during separation of initial mass flow and enriched with hydrogen and containing hydrocarbons is added to liquid flow (37, 38) passed for cold production through low-temperature separation circuit, enriched with hydrocarbons and supplied to dehydrogenation reactor, heated together with it owing to heat exchange with cooled process flows and as the so-called combined mass flow (40) is supplied to dehydrogenation process. The other gas fraction (27) enriched with hydrogen, containing hydrocarbons, as well as liquid fraction (18) extracted at separation of initial mass flow, entiched with hydrocarbons, containing hydrogen is extracted after pre-heating as final products from production plant. One more gas fraction enriched with hydrogen and containing hydrocarbons is returned after pre-heating in the form of so-called throttle gas (15) to initial mass flow. By means of intermediate expansion (a) of liquid fraction there decreased is concentration of hydrogen in liquid product at simultaneous observance of specifications on the rest mass flows.
EFFECT: possibility of effective reduction of hydrogen content in liquid product.
10 cl, 3 dwg
