FIELD: oil and gas industry.
SUBSTANCE: method for separating coke drum vapours is described comprising: feeding coke drum vapours to evaporation area of coke plant rectifying column; diverting heavy coke gas oil stream from coke plant rectifying column; treating heavy coke gas oil stream to remove impurities; and producing heavy coke gas oil stream suitable for hydrocracking, at that the impurities being removed from heavy coke gas oil stream with a stream of superheavy coke gas oil which is returned to delayed coking plant rectification unit by means of selective separation, and produced lighter coke gas oil of improved quality is sent in descending stream of vacuum gas oil conversion unit.
EFFECT: improvement of installation scheme and coking method in order to improve separation quality and increase the yield of produced heavy coke gas oil.
4 cl, 5 tbl, 11 dwg
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