Introduction and Use of vacuum spray dryer
Spray dryer is a form of rapid development in the field of drying and a wide range of applications.
Vacuum spray dryer is suitable for liquid raw materials such as solutions, emulsions, and pumpable suspensions to generate powder, granular, or block solid products. The different drying characteristics of the material to be dried, such as heat sensitivity, viscosity, and fluidity, as well as the different quality requirements of the product’s particle size, particle size distribution, residual moisture content, bulk density, particle shape, etc., determine the use of different types of atomizers, air movement mode, and structure of the drying chamber.
Through mechanical action, the material to be dried in the vacuum spray dryer tower is dispersed into mist-like particles to increase the evaporation area of water and accelerate the drying process. After contact with hot air, most of the water is instantly removed, but the material is The solid matter dries into a powder.
Vacuum spray dryer is a process in which a high-speed rotating atomizer is used to disperse the material liquid into fine droplets, and the solvent is quickly evaporated in a thermal drying medium to form a dry powder product.
Vacuum spray dryer can directly dry the solution, emulsion, and suspension into powder, granule, hollow sphere, or granular products. Because of its high drying efficiency, less damage to the active ingredients, the obtained extract powder is uniform, fine, and low in water content, and is widely used in the industrialized mass production of traditional Chinese medicine formula particles. Its instantaneous drying provides a hygienic and convenient way to dry the Chinese medicine extract and provides a guarantee for maintaining the effective ingredients of the medicine and ensuring the curative effect of the medicine.
The technology simplifies and shortens the process and time from the traditional Chinese medicine extract to the finished preparation, improves production efficiency and product quality, and effectively reduces the loss caused by the process. The disadvantage is that the obtained extract powder is easy to absorb water, and the phenomenon of wall sticking, adhesion, and moisture absorption and agglomeration of the powder is easy to occur during the drying process. At the same time, heat loss and power consumption are large, and equipment cleaning is difficult.
The laboratory vacuum spray dryer is specially developed for heat-sensitive materials.
The whole machine has a compact design and is self-contained. It can run without other facilities. One-button startup, large color LCD touch screen operation, two operating modes, fully automatic or manual monitoring, convenient for operation and monitoring of the experimental process, especially for instant drying of materials under low temperature conditions, and extremely convenient for heat-sensitive materials extremely safe drying methods, such as biological products such as enzyme preparation live bacteria, natural product extracts of traditional Chinese medicine with high sugar content, heat-labile polymer materials, materials that vaporize when exposed to heat, etc.; low-temperature vacuum spray dryer run for a long time or due to Inappropriate operation, aggregates will appear in some spray granulation dryers and affect normal operation.
At this time, it is necessary to stop work for cleaning. For the cleaning of aggregates in the drying tower, the cleaning door should be opened and the funnel-shaped bottom collection should be swept away with a long broom. When opening the discharge valve and turning on the freezer, you must turn on the circulating water and flush the tower with tap water.