The small spray dryer is the widest used technology in the liquid shaping technology and in the drying industry. It is most suitable for producing powder, particle, or block solid products from materials of solution, emulsion, soliquoid and pumpable paste states. Therefore, when the particle size and distribution of the final products, their residual water contents, the stocking density and the particle shape meet the precision standards, the spray drying is one of the most desired technologies.

Small spray dryer mainly includes atomisation system, drying system, and collection system.

Small Spray Dryer：

1. High speed of drying. After the spraying of he material liquid, the surface area of the material will be increased greatly. In the hot-air flow, 95%-98% of water can be evaporated at a moment. The time of completing the drying needs only several seconds.
2. It is especially suitable for drying the heat sensitive materials. It's final products own the good uniformity, mobility, dissolving capacity. And the final products are high in purity and good in quality.
3. Improve product quality: through the improvement of small spray drying technology, can effectively control the particle size distribution and physical and chemical properties of the product particles, thus greatly improving product quality.
4. Improving drug bioavailability: by optimising spray drying parameters, amorphous solid dispersions can be prepared with good yields and consistent particle size distributions, which are essential for improving the bioavailability of difficult-to-solve drugs.

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