How to choose the right laboratory spray dryer


According to the physical or chemical properties of different materials, and the size and solubility of powders or granules that need to be obtained in experiments, scientific researchers may need different types of laboratory spray dryers to get the best experimental results. Below I will introduce to you how to choose a suitable laboratory spray dryer in different situations.

  1, high sugar content (if juice, Chinese herbal medicine or natural product extracts) or heat sensitive materials

  Because most polysaccharide disaccharides have a relatively low melting point, sugars melt when heated, and the polysaccharide disaccharide itself is relatively easy to absorb moisture, so ordinary spray dryers are prone to sticky walls, not easy. Get good dry powder or granules. In addition, like enzyme preparations, live bacteria, and some polymer materials that are more easily denatured at high temperatures, using ordinary spray dryers, the materials are easily deactivated or denatured. At this time, reduce the inlet air temperature and outlet air of the spray dryer. Temperature can get better experimental results.

  2, the solvent is organic solvent or easily oxidizable material

  Spray drying contains the problem that organic solvent materials are difficult to dry. Generally, organic solvents are flammable and explosive. Explosion-proof closed laboratory spray dryers can circulate materials in a closed drying system, and the entire system is filled with inert gas. (Such as nitrogen or argon), which can avoid the contact between the organic solvent gas and the external oxygen air, and ensure safe production.

laboratory spray dryer

  3. Materials that need to get large particle powder

  In some experiments, scientific researchers hope to get some samples of large particles. For example, the catalyst industry generally requires particles of about 100 microns to have a better catalytic effect, but ordinary laboratory spray dryers can only get less than 30 microns. Therefore, it is necessary to choose an experimental spray dryer to obtain particles of about 100 microns.

  4. Materials with extremely poor heat sensitivity or need to improve solubility

  Some materials can hardly be heated, the traditional freeze-drying time is very long, and the dried materials become lumpy, with poor fluidity and poor solubility. So choose to form spherical particles with microporous structure after drying, good fluidity, and the size of the particles can be adjusted by changing the spray process of the laboratory spray dryer.

  In summary, different experimental spray dryers should be selected for different materials, so that they can work stably and efficiently.

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