Shanghai Haozhuang Instrument Co., Ltd. has developed a small spray dryer of the brand Hao Zhuang (LNB), which is energy-saving and environmentally friendly, leading the country. Professional manufacturing is more secure and affordable
Common problems and development direction:
1. Materials with extremely poor thermal sensitivity or requiring improved solubility Some materials cannot be heated. The traditional freeze-drying time is very long, and the dried materials are lumpy, with poor fluidity and poor solubility.
Second, the material solvent is an organic solvent or the material is easily oxidized or toxic. The organic solvent is difficult to dry in the spray drying. The general organic solvent will be flammable and explosive. The explosion-proof closed small spray dryer allows the material to The closed drying system is circulated, and the whole 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, ensuring safe production. Moreover, since the boiling point of the organic solvent is low, it is possible to dry materials that are easily thermally denatured by low-temperature drying.
3. The material has a high sugar content (if juice, Chinese herbal medicine or natural product extract) or the material is not heat-resistant (thermosensitive materials such as enzyme preparations, live bacteria, etc.). Because most polysaccharides are disaccharide oligosaccharides, the melting point is relatively low. When heated, the sugar melts, and the polysaccharide disaccharide itself is relatively easy to absorb moisture, so the ordinary spray dryer will easily stick to the wall, and it is not easy to 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, use ordinary spray dryers, because the inlet air temperature is at least 180 ° C, the material is very easy to inactivate or denature, at this time, Lowering the inlet air temperature of the spray dryer can get better experimental results.
4. Conventional materials such as battery materials, minerals, polymer materials, compounds, flavors and fragrances, food, western medicine, etc. Some laboratories are used for the preparation of conventional powders or the drying of materials, small size, fast speed, low noise, and wide adaptability , It can have a good spray drying effect on most materials such as battery materials, minerals, polymer materials, compounds, flavors and fragrances, food, western medicine, etc. The dried powder has good sphericity and the particle size is distributed in a positive too. 5. Materials that need to obtain large particles of powder In some experimental processes, scientific researchers hope to obtain some samples of large particles. For example, in the catalyst industry, particles of about 100 microns are generally required to have better catalytic effects, but ordinary spray dryers Only particles below 30 microns can be obtained, particles around 5-30 microns can be obtained, granulation of small particle powders can also be achieved, and it is a pursuit to obtain large particles above 100-500 microns.
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