FIELD: distilling liquid products, primarily raw oil. SUBSTANCE: unit has vacuum rectifying column and vacuum-building device incorporating pump, separator, and jet device. Pump inlet is connected to separator. Jet device is single- or multiple-stage liquid-gas apparatus connected through delivery line to separator and through inlet of liquid feed nozzle or through that of first- stage liquid feed nozzle, to pump outlet; axis of jet device and delivery line is strictly vertical accurate within +15 to -15 deg. Delivery line is provided with at least one liquid admission device and distillation unit has additional pump whose inlet is connected to separator and outlet, to device for liquid admission to delivery line to form following off-line circulating loop for liquid medium: separator - additional pump - device for liquid admission to delivery line - separator. Device for liquid admission to delivery line is disposed from inlet of delivery line to separator at elevation not lower than half the delivery line elevation above separator. EFFECT: augmented distillation process. 2 cl, 2 dwg
