Molecular distillation vacuum system

The utility model relates to a molecular distillation vacuum apparatus technical field discloses a molecular distillation vacuum system. It includes the pneumatic baffle valve of high vacuum, oily diffusion-ejector pump, lobe pump unit, slide valve pump, gas circuit system, is connected through the bellows between each part, and the one end of the pneumatic baffle valve of high vacuum is connected with oily diffusion-ejector pump, and the other end of the pneumatic baffle valve of high vacuum is connected with mixed low temperature collecting trap, mixes the low temperature collecting trap and includes the collecting trap casing, and the both sides terminal surface of collecting trap casing is equipped with the baffle respectively, and the parcel on the surface of baffle has the silk screen, and the inner chamber of collecting trap casing is equipped with the refrigerant coil pipe, and entrance point, the exit end of refrigerant coil pipe are connected with the refrigerator that sets up mixing the low temperature collecting trap outside respectively. The utility model discloses both can the entrapment oil diffusion-ejector pump return oil, prevent to distill simultaneously the molecule again and get into oily diffusion-ejector pump, improved the quality of rectification product, reduced the cost of maintenance of equipment.