METHOD OF FUEL OIL REFINING Russian patent published in 2015 - IPC C10G7/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to method of fuel oil refining including its heating in the furnace and supply to vacuum column with off-take by side streams of vacuum distillates and tar from bottom of the vacuum column, using circulating reflux and supply to column bottom of the evaporating agent and part of cooled tar, condensation of light hydrocarbon vapours removed from top of the vacuum column, and with separation of uncondensable gases and vapours, and condensate of hydrocarbon vapours. Light hydrocarbon vapours from top of the vacuum column are supplied to the hydraulic ejector, are ejected by the work liquid, and then are supplied to ejecting agent tank, where fresh ejecting agent (make-up) is also supplied, part of liquid from bottom of the ejecting agent tank is cooled and used as work liquid, another part containing condensate of hydrocarbon vapours is mixed with part of light vacuum distillate, and after heating is supplied to bottom of the vacuum column as evaporating agent or to evaporator, from its top the vapours are supplied to bottom of the vacuum column as evaporating agent, and liquid from bottom is supplied to the ejecting agent tank together with make-up, at that above the zone of heated fuel oil supply the heavy vacuum distillate is removed from the column and is mixed with fuel oil before its heating in the furnace.

EFFECT: increased removal of vacuum distillates and reduced degree if fuel oil decompounding in the furnace, reduced creating of acid water drains.

1 dwg, 2 tbl