FIELD: oil and gas industry.
SUBSTANCE: crude oil distillation method comprises the following stages: i) hydrocarbon crude oil is directed into a preliminary flash evaporation vessel maintained under conditions that allow crude oil separation into liquid resulting from the preliminary flash evaporation and vapour generated from the preliminary flash evaporation, ii) the liquid resulting from the preliminary flash evaporation is directed into a furnace maintained under conditions that provide heating and partial vaporization of the said liquid, iii) from the furnace, the heated flow is directed into the bottom of the atmospheric distillation column maintained under fractionation conditions; iv) the vapour resulting from the preliminary flash evaporation is directed into the area of the said distillation column located at the bottom of the stripping area located below the introduction area of flow coming from the furnace, and v) the water vapour is directed into the area of the said distillation column located at the bottom of stripping area so that the liquid flow coming from the furnace is contacted with the water vapour, and the vapour resulting from the preliminary flash evaporation, in the stripping area under conditions sufficient to strip liquid flow coming from the furnace, and the said vapour resulting from prior flash evaporation contains not more than 30 wt % of water and/or water vapour.
EFFECT: reduced amount of used water vapour.
8 cl, 1 dwg
