OIL REFINING Russian patent published in 2014 - IPC C10G7/00 C10G7/06 

FIELD: oil-and-gas industry.

SUBSTANCE: heated stock is fed into partial tripping column. Gasoline fraction is extracted from column top to be used as a reflux. Still bottoms are extracted at feed of heated flow to column still. Sill residue is heated in kiln and distilled in complex atmospheric column equipped with lateral stripper sections with feed of heated flows to bottom of sections and complex atmospheric flows. Heavy gasoline fraction is extracted from complex atmospheric column top while in side-cut distillates via stripper sections extracted are kerosene, light and heavy diesel fractions and fuel oil is extracted from complex atmospheric column bottom. Fuel oil heated in the furnace is fed into vacuum column with extraction of diesel fraction, light and heavy vacuum gas oils and tar is extracted from vacuum column bottom with application of circulation irrigation in complex atmospheric and vacuum columns and with feed of evaporation agent to vacuum column bottom. Fuel oil before heating in furnace is fed to vacuum section bottom while cooled fluid is fed to top of said section. Said fluid is extracted from complex atmospheric column section located between stock feed inlet and side-cut distillate discharge into stripper of heavy diesel fraction. Vapours from vacuum section top are subjected to partial condensation. Liquid phase is directed to vacuum column, to section between bleeds of light and heavy gas oils. Vapour phase is completely condensed, heated and fed to vacuum column bottom as evaporator agent. Fluid from vacuum section bottom, after heating in furnace, is fed to vacuum column feed zone.

EFFECT: lower power and capital costs and consumption of acid waters.

1 dwg, 1 tbl