Internal heating type molecular distillation device

Abstract

The invention discloses an internal heating type molecular distillation device. The internal heating type molecular distillation device comprises an outer sealing device and an inner heating unit, wherein the sealing body of the outer sealing device is in a hollow cylinder with a bottom end or a cylindrical structure and is provided with a top end seal which is provided with a material inlet pipe;the inner heating unit is in a circular truncated-cone-shaped or conical or cylindrical structure and is mounted at the internal bottom end of the sealing body or is a part of the bottom end of the sealing body; the heating surface of the outer wall of the heating unit is provided with a plurality of material distributors; a vacuum tube is arranged on the sealing body, and the space between the inside of the sealing body and the heating unit is communicated with the vacuum tube; a low-boiling-point material outlet is formed at the bottom of the inner wall of the sealing body, and a high-boiling-point material outlet is arranged on the edge of the lower end of the heating unit. According to the internal heating type molecular distillation device, materials can automatically form films along an inclined surface from top to bottom to achieve continuous production; the time for the materials to passing on a heating surface can be short, and good product quality, high heat utilization rateand low production cost can be achieved.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment, and relates to equipment for distillation and purification of edible oil products, oleochemical products, other various chemical products and plant extracts and separation of different components, in particular to an internal heating molecular distillation equipment. technical background [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,...

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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] The applicant’s associated patent applied for an invention patent on August 7, 2012. The invention patent number is ZL201210277674.7. The molecular distillation equipment includes a molecular distillation equipment body and a vacuum tube. The molecular distillation equipment body is an upper ring larger than a lower ring. The inverted body of the ring is an annular round platform, and the material distributor on the top and the molecular distillation equipment of the cooling water pipe have high manufacturing requirements and complicated manufacturing processes. At the same time, in the vacuum chamber, the manufacturing and maintenance are very complicated.

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