OIL REFINING METHOD Russian patent published in 2014 - IPC C10G7/00 C10G7/02 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to the oil refining method that includes introduction of the heated raw material into the column for partial stripping with an intake of light naphtha from the column top which is also used as reflux and intake of the stillage residue, heating of the stillage residue in the furnace and its distilling in a complex water vapour column equipped with side steaming sections and delivery to the sections bottom and the complex water vapour column of the heated flows and use of live reflux and circulating reflux, intake of naphtha from the top of the complex water vapour column, intake of light and heavy diesel oil cuts from the side streams through the steaming sections and intake of fuel oil from the bottom of the complex water vapour column, stabilisation of gasoline cuts with production of gas and stable gasoline. The heated raw material is introduced as the upper and lower stream into the column for partial stripping, at that the lower stream represents more than half of the raw material, which is heated in the furnace and delivered to the column bottom. Naphtha balance is returned to the column of partial oil stripping, stabilization of gasoline cuts is made by discharge of naphtha from the return zone of the column of partial oil stripping delivered there into the steaming section, to this section bottom heat is delivered, at that vapour from the steaming section is returned to the column of partial oil stripping and stable gasoline is outputted. Balance excess of gasoline cut from the top of the column for partial stripping is returned to the top of the steaming section in this column together with the side stream, combination gas from the top of the reflux drum in the column for partial stripping is fed to the absorber bottom, to the absorber top the cooled liquid is fed and this liquid is taken below the side stream intake to naphtha steaming section, gas is outputted from the absorber top, liquid from the absorber bottom is returned to the column for partial stripping below the output of the side stream to the steaming section, below the input of the liquid from the absorber bottom to the column for partial stripping the side stream is taken and delivered to the complex water vapour column below the point of the side stream output to naphtha steaming section.

EFFECT: reducing energy and capital expenditures.

1 dwg, 3 tbl