Laboratory Film Evaporator for Vacuum Short-Range Distillation of Light and Heavy Components Purification and Separation

Laboratory Film Evaporator for Vacuum Short-Range Distillation of Light and Heavy

ComponentsApplications:Fine Chemicals: Purification of essential oils, polymer intermediates, wool fat extraction, etc. Pharmaceuticals: Extraction of vitamins (e.g., A and E), production of amino acids and glucose derivatives, etc. Food Industry: Oil refining, deacidification of fats, refining of high-carbon alcohols, separation of mixed oils, etc. Other Industries: Petroleum, daily chemicals, environmental protection, etc.

Product Features:Operates at temperatures lower than the boiling point of materials, with short residence times, making it ideal for separating high-boiling, heat-sensitive, and easily oxidized substances.

Effectively removes substances like solvents and odors from liquids, particularly effective in solvent extraction processes. Selective evaporation of products to remove impurities. Multi-stage separation allows simultaneous separation of two or more substances.

High vacuum distillation with a vacuum level of less than 0.1 Pa, ensuring minimal oxidation and damage to materials due to low operating pressures.Thin liquid film (less than 0.5 mm thick) for efficient heat transfer.High separation efficiency, capable of separating substances that are difficult to separate using conventional methods.

No boiling or bubbling phenomenon during distillation—molecular distillation is a free evaporation process at low pressures, preventing the entire liquid from boiling and eliminating bubble formation.Multiple specifications available to meet customer needs for small-scale or pilot experiments.

Customizable designs for large evaporation areas upon request.Physical separation method with no harmful residues, yielding pure products.Scraper system made from PTFE and SS316L stainless steel for excellent corrosion resistance.

Feed tanks with optional preheating functions, with adjustable preheat temperatures.Seals at various interfaces use fluorine rubber gaskets for good airtightness, with the option to replace them with PTFE for corrosion resistance upon request.

What are the performance characteristics of thin-film evaporators?

Thin-film evaporators are a type of evaporator. Their characteristic is that the material liquid flows along the heating tube wall in a film-like manner for heat transfer and evaporation.

The advantages are fast heat transfer and evaporation speed, short material residence time, and thus they are particularly suitable for the evaporation of heat-sensitive substances.Performance characteristics of thin-film evaporators:Small vacuum pressure drop: The vaporized gas of the material is sent from the heating surface to the external condenser, and there is a certain pressure difference.

In general evaporators, this pressure drop (Δp) is usually relatively high, sometimes even unacceptable.

However, in the scraper thin-film evaporator, there is a large gas passage space, and the pressure inside the evaporator can be considered almost the same as that in the condenser. Therefore, the pressure drop is very small, and the vacuum degree can reach 5mmHg.Low operating temperature: Due to the above characteristics, the evaporation process can be carried out under a high vacuum degree.

With the increase of vacuum degree, the corresponding boiling point of the material decreases, so the operation can be carried out at a lower temperature, reducing the thermal decomposition of the product.Short heating time: Due to the special structure of the scraper thin-film evaporator, the scraper has a pumping effect, which makes the material residence time in the evaporator very short.

In addition, due to the high-speed turbulent flow of the thin film on the heated surface, the material will not adhere to the evaporator surface.

Therefore, it is particularly suitable for the evaporation of heat-sensitive materials.High evaporation intensity: The decrease in the boiling point of the material increases the temperature difference with the heat medium; the function of the scraper reduces the thickness of the turbulent liquid film, reducing the thermal resistance.

At the same time, during this process, it inhibits the adhesion and scaling of the material on the heating surface and has good heat exchange, thus increasing the overall heat transfer coefficient of the scraper thin-film evaporator.

Large operating flexibility: Due to the performance of the scraper thin-film evaporator, it is suitable for handling heat-sensitive, requiring stable evaporation, high-viscosity, and materials with rapidly increasing viscosity as the concentration increases.

The evaporation process can also be carried out stably.

It can also be successfully applied to the evaporation and distillation of materials containing solid particles, crystallization, polymerization, scaling, etc.