FIELD: oil refining industry; refining of mazut.
SUBSTANCE: proposed plant includes vacuum rectifying column provided with inlet for delivery of initial vapor-and-gas-and-liquid mixture, outlet for discharge of tar oil from its lower part, side outlet for discharge of diesel fuel fraction from its upper part, three or four side branches located at different heights in zone of formation of target distillates and vacuum-forming unit. According to first version, vacuum-forming unit is made in form of direct-contact condenser connected with shell-and-tube condenser and with first separator-drier which is connected with reservoir and with jet ejector, vortex ejector and second separator-drier. According to second version, vacuum-forming unit is made in form of direct-contact condenser connected with jet ejector, vortex ejector and separator-drier. Vacuum-forming unit is provided with pump for delivery of working fluid to ejectors; its outlet is connected with inlets to jet and vortex ejectors and inlet is connected with working fluid inlet. First side branch for discharge of target distillates is located at section corresponding to temperature increment of (-Δt) equal to 150-160°C and other branches are located at sections corresponding to temperature increment (-Δt) equal respectively to 85-100°C and 75-78°C or 85-100°C, 75-78°C and 40-45°C relative to temperature of initial vapor-and-gas-and-liquid mixture.
EFFECT: increased degree of refining of oil raw material; possibility of obtaining three or four side fractions at optimal composition.
10 cl, 2 dwg, 1 tbl, 4 ex
