Molecular distillation device

Abstract

The invention discloses a molecular distillation device which comprises a molecular distillation device body (1) and a vacuum pipe (7) and is characterized in that the molecular distillation device body (1) is an inversion body annular round table with the upper ring larger than the lower ring. The included angle formed by intersection of two opposite generatrixes of the inversion body annular round table ranges from 45 degrees to 85 degrees. The body is connected with a top end sealing head connected with a material adding pipe (2), and the inner wall of the top end sealing head is connected with the upper end side of a distribution annular round table formed by material distribution groove plates (4). An annular gap is retained between the lower end side of the distribution annular round table formed by the material distribution groove plates (4) and the lateral wall of the body, and an outlet of the material adding pipe (2) is arranged in a distribution groove. The middle of the lateral wall of the body is connected with the lower end side of a redistribution annular round table formed by material redistribution groove plates (5). An upper body and a lower body of the device body are connected in series when necessary, and a condensation system is arranged in an inner cavity of the body. The molecular distillation device is good in sealing effect, and a film is automatically formed from top to bottom along the table face by materials. The molecular distillation device does not require stirring and has the advantages of saving electricity, improving heat energy utilization ratio, reducing production cost and the like.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment, and relates to distillation and purification equipment for oil and chemical products, in particular to molecular distillation equipment. Background technique [0002] Molecular distillation, also known as short-path distillation, is a relatively new liquid-liquid separation technology that has not been widely used in industrial production. Its application can solve a large number of problems that cannot be solved by conventional distillation technology. Compared with conventional distillation technology, it has the following advantages: 1. Ordinary distillation operates at the boiling point, while molecular distillation can be separated at any temperature as long as there is a sufficient temperature difference between the hot and cold surfaces. Therefore, the operating temperature of molecular distillation is much lower than the boiling point of the material. 2. Ordinary distillat...

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Problems solved by technology

2. Ordinary distillation has bubbling and boiling phenomena, while molecular distillation is free evaporation on the surface of the liquid film, and the operating pressure is very low. Generally, it is on the order of 0.1-1Pa, and the heating time is very short, generally only ten seconds to several minutes.

3. Evaporation and condensation in ordinary distillation are reversible processes, and there is a dynamic phase equilibrium between the liquid phase and the gas phase, while in the molecular distillation process, the molecules escaping from the heating surface fly directly to the condensation surface, and theoretically do not return to the heating surface Possibility, so molecular distillation has no hard-to-separate substances

[0003] Although the evaporation efficiency of molecular distillation equipment is high, the structure is complicated, the vacuum sealing is difficult, the manufacturing cost of the equipment is expensive, and the cost of operation and maintenance is also very high

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