Spray drying is a method of systematic application of material drying. After the liquid material is atomized in the drying chamber, the moisture rapidly vaporizes in contact with the hot air, and the dried product is obtained. The method can directly make the solution Emulsion dried into powder or granular products, can save evaporation, grinding and other processes, and the resulting particles are distributed evenly.
Spray drying has the characteristics of rapid heat transfer, rapid evaporation of water, instant drying time, good product quality, good dissolution performance, and can improve the dissolution rate of certain formulations. In addition, spray drying can also be used to prepare microcapsules.
Spray drying equipment
Recently, the development of spray drying equipment in the country has been extremely rapid. In the laboratory field, the laboratory spray drying method for aqueous solutions has also become more mature. However, spray drying of organic solvent materials has always been used in foreign equipment, equipment is expensive, and maintenance is not very convenient. Shanghai Yacheng Instrument Equipment Co., Ltd. has successfully developed an experimental organic solvent spray dryer YC-015A based on years of laboratory spray dryer production, which fills the gap in the field of R&D equipment for domestic laboratory organic solvent spray dryers.
YC-015A Experimental Organic Solvent Spray Dryer adopts a safe nitrogen (or other inert gas) closed cycle method. The entire system is completely closed, and the oxygen concentration is monitored online. Once the oxygen concentration in the system reaches 1.5%, the system will Automatically shut down and alarm, it is a small-scale spray dryer for laboratory organic solvents with good safety and easy operation. It can be used for the treatment of solvents with flammability and toxicity through the combined use of nitrogen-enclosed circulation and solvent recovery. Drying of easily oxidizable substances is also possible. Moreover, since the boiling point of the organic solvent is low, it is possible to dry the substance susceptible to thermal denaturation by means of low-temperature drying.
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The spray dryer atomizes the liquid material into fine mist droplets through a nozzle, contacts the heat medium in the drying tower, and is dried to become a thermal process of the powder material. The feed can be a solution, a suspension or a paste. The atomization can be achieved by a rotary atomizer, a pressure atomizing nozzle and an air atomizing nozzle. The operating conditions and the design of the drying device can be according to the required drying of the product. Characteristics and powder specifications.
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