Method for the vacuum distillation of a liquid product, particularly oil stock, (variants) and system for realizing the same

A method for vacuum distillation of a liquid product, comprising the steps of:

• feeding a liquid product into an evacuated reservoir;
• feeding a polar liquid as a motive liquid into a vacuum-producing liquid-gas jet apparatus;
• evacuating a gas-vapor medium having a nonpolar component and at least one polar component from the reservoir by the vacuum-producing liquid-gas jet apparatus;
• condensing the evacuated gas-vapor medium by the motive liquid flowing from a nozzle of the liquid-gas jet apparatus;
• forming a mixture in the liquid-gas jet apparatus of a gaseous phase and a liquid emulsion having the polar liquid, a polar condensate from the at least one polar component of the evacuated gas-vapor medium, and a nonpolar condensate from the nonpolar component of the evacuated gas-vapor medium;
• disengaging the mixture into the gaseous phase and the liquid emulsion;
• mixing the polar condensate with the polar liquid and consequently forming a homogeneous polar liquid medium;
• separating the liquid emulsion into at least two continuous layers, one layer including the homogeneous polar liquid medium and another layer including the nonpolar condensate;
• discharging the gaseous phase after said step of disengaging the mixture into the gaseous phase and the liquid emulsion;
• withdrawing the nonpolar condensate after said step of separating the liquid emulsion into the at least two continuous layers;
• withdrawing a surplus amount of the homogeneous polar liquid medium which is equal in amount to the polar condensate after said step of separating the liquid emulsion into the at least two continuous layers;
• recycling the remainder of the homogenous polar liquid medium after said step of separating the liquid emulsion into the at least two continuous layers by pumping the remainder of the homogenous polar liquid medium back into the nozzle of the vacuum-producing liquid-gas jet apparatus as the motive liquid.

A method for vacuum distillation of a liquid product, comprising the steps of:

• feeding a liquid product into an evacuated reservoir;
• feeding a nonpolar liquid as a motive liquid of a vacuum-producing liquid-gas jet apparatus;
• evacuating a gas-vapor medium having a polar component and at least one nonpolar component from the reservoir by the vacuum-producing liquid-gas jet apparatus;
• condensing the evacuated gas-vapor medium by the motive liquid flowing from a nozzle of the liquid-gas jet apparatus;
• forming a mixture in the liquid-gas jet apparatus of a gaseous phase and a liquid emulsion having the nonpolar liquid, a nonpolar condensate from the at least one nonpolar component of the evacuated gas-vapor medium, and a polar condensate from the polar component of the evacuated gas-vapor medium in the liquid-gas jet apparatus;
• disengaging the mixture into the gaseous phase and the liquid emulsion;
• mixing the nonpolar condensate with the nonpolar liquid and consequently forming a homogeneous nonpolar liquid medium;
• separating the liquid emulsion into at least two continuous layers, one layer including the homogenous nonpolar liquid medium and another layer including the polar condensate;
• discharging the gaseous phase after said step of disengaging the mixture into the gaseous phase and the liquid emulsion;
• withdrawing the polar condensate after said step of separating the liquid emulsion into the at least two continuous layers;
• withdrawing a surplus amount of the homogenous nonpolar liquid medium which is equal in amount to the nonpolar condensate after said step of separating the liquid emulsion into the at least two continuous layers;
• recycling the remainder of the homogenous nonpolar liquid medium after said step of separating the liquid emulsion into the at least two continuous layers by pumping the remainder of the homogenous nonpolar liquid medium back into the nozzle of the vacuum-producing liquid-gas jet apparatus as the motive liquid.

A method for vacuum distillation of a liquid product, comprising the steps of:

• feeding a polar liquid product into an evacuated reservoir;
• feeding a nonpolar liquid as a motive liquid into a vacuum-producing liquid-gas jet apparatus;
• evacuating a polar gas-vapor medium from the reservoir by the vacuum-producing liquid-gas jet apparatus;
• condensing the evacuated polar gas-vapor medium by the motive liquid flowing from a nozzle of the liquid-gas jet apparatus;
• forming a mixture of a gaseous phase and a liquid emulsion having the nonpolar liquid and a polar condensate comprising a condensable component of the evacuated polar gas-vapor medium in the liquid-gas jet apparatus;
• disengaging the mixture into the gaseous phase and the liquid emulsion and simultaneously separating the liquid emulsion into at least two continuous layers, one layer having the nonpolar liquid and another layer having the polar condensate;
• discharging the gaseous phase after said step of disengaging the mixture into the gaseous phase and the liquid emulsion;
• withdrawing the polar condensate after said step of separating the liquid emulsion into the at least two continuous layers;
• recycling the nonpolar liquid after said step of separating the liquid emulsion into the at least two continuous layers by pumping the nonpolar liquid back into the nozzle of the vacuum-producing liquid-gas jet apparatus as the motive liquid.

A system for vacuum distillation of a liquid product, which comprises:

• an evacuated reservoir having connected thereto a first pipe for evacuation of a gas-vapor medium, a second pipe for discharging a distillation residue and a third pipe for export of a side-cut distillate;
• a vacuum-producing device connected to the first pipe which comprises a circulation system having a liquid-gas jet ejector, a separator and a pump;
• wherein the separator includes a first pipeline, a second pipeline and a third pipeline connected to the separator for discharging a gaseous phase;
• wherein one end of the first pipeline is connected to a first section of the separator having a volume of a motive liquid which comprises a first layer accumulated in the separator after breaking of a liquid emulsion entering the separator, and another end of the first pipeline is connected to a second suction port of the pump;
• and
• wherein the second pipeline is connected to a second section of the separator having a volume of a condensate of the gas-vapor medium which comprises a second layer accumulated in the separator after breaking of the liquid emulsion entering the separator.