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 tower. Gasoline fraction is extracted from tower 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 condensed and directed to vacuum column between bleeds of light and heavy vacuum gas oils. Fluid from vacuum section bottom, after heating in furnace, is fed to vacuum column feed zone. Light and heavy diesel fractions are obtained in vacuum column. Light diesel fraction after heating is fed to vacuum column bottom as evaporator agent.

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

1 dwg, 1 tbl