| 摘要 |
The invention essentially relates to a method for vacuum distillation of liquids that includes feeding a polar liquid into a vacuum-producing liquid-gas jet apparatus as a motive liquid if evacuation of a nonpolar gas-vapor medium is to be effected. Further, the method includes condensing the nonpolar gas-vapor medium, forming a gas-liquid mixture, disengaging a gaseous phase from the mixture, forming a liquid emulsion containing the polar liquid and a nonpolar condensate, separating the emulsion into continuous layers, withdrawing the nonpolar condensate and recycling the polar liquid by pumping it back into the liquid-gas jet apparatus. A nonpolar liquid is to be used as the motive liquid of the liquid-gas jet apparatus if evacuation of a polar gas-vapor medium is required. There is another variant of the method applicable when an evacuated gas-vapor medium contains both polar and nonpolar components. As distinct from the previous variants, in this case, the method comprises forming a liquid emulsion containing a polar liquid, a polar condensate and a nonpolar condensate, mixing of the polar substances and forming a polar liquid medium, separation of the emulsion into layers of the polar medium and nonpolar condensate, withdrawing a surplus amount of the polar medium, and recycling a remainder of the polar medium as the motive liquid. The system realizing the methods has an evacuated reservoir with a pipeline for evacuation of a gas-vapor medium, a vacuum-producing device composed of a liquid-gas jet ejector, a separator and a pump. A suction port of the pump is connected to a section of the separator, where a layer of a liquid being used as the motive liquid settles.
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