Application fields and characteristics of thin film evaporators
Release Time:
2022-11-24
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Thin film evaporator is a special liquid-liquid separation technology. Under high vacuum, the mean free path of vapor molecules is greater than the distance between the evaporation surface and the condensation surface, so that the evaporation rate of each component in the feed liquid can be utilized. difference to separate liquid mixtures.
One: The application field of thin film evaporator:
1. Fine chemical industry, such as the purification of aromatic oil, the purification of polymer intermediates, the extraction of lanolin, etc.
2. Pharmaceutical field: such as extraction of natural vitamin AE, etc., preparation of derivatives of amino acids and glucose, etc.
3. Food industry: such as refined fish oil, oil deacidification, refined high-carbon alcohol, separation of mixed oils, etc.
4. Other fields: petroleum industry, daily chemistry, environmental protection, etc.
Two: The characteristics of the thin film evaporator:
1. Operate at a temperature far lower than the boiling point of the material, and the residence time of the material is short, which is beneficial to the separation of high boiling point, heat-sensitive and easily oxidizable materials.
2. Effectively remove substances in the liquid such as organic solvents, odors, etc. It is a very effective method for the precipitation of liquid after solvent extraction.
3. Products can be selectively evaporated to remove other impurities, and more than two substances can be separated at the same time through multi-stage separation.
4. Distillation has a high degree of vacuum, which can reach below the standard pa, and a high degree of vacuum can be obtained inside. Molecular distillation is usually operated at a very low pressure, so the material is not easy to be oxidized and damaged.
5. The distilled liquid film is thin, the heat transfer efficiency is high, and the film thickness is small.
6. The degree of separation is higher. Molecular distillation can separate substances that are not easy to separate.
7. There is no boiling and bubbling phenomenon. Molecular distillation is free evaporation on the surface of the liquid layer. It is carried out under low pressure and there is no dissolved air in the liquid. Therefore, the entire liquid cannot be boiled during the distillation process, and there is no bubbling phenomenon.
8. Provide a variety of specifications for customers to choose from, suitable for small-scale experiments and pilot-scale experiments for customers. If a larger evaporation area is required, it can be customized according to customer requirements.
10. The feed tank is optional to realize the preheating function, and the preheating temperature can be adjusted.
11. Each interface is sealed with fluorine rubber gasket, which has good air tightness. If the customer needs corrosion resistance, it can be replaced with PTFE.
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