Small spray dryer for laboratory of Chinese medicine pharmacy:
1 Basic principles, equipment and processes Spray drying is a better method of fluidization technology for drying liquid materials. The basic principle is to use an atomizer to spray a certain concentration of liquid materials into mist droplets, which fall into a hot air flow at a certain flow rate to quickly dry them to obtain powder or granular products. Its characteristics are: instant drying, especially suitable for heat-sensitive materials; good product quality, maintaining the original color and fragrance, and easy to dissolve;
The principle of the small spray dryer in the laboratory of traditional Chinese medicine
The product thickness, water content and other quality indicators can be adjusted and controlled according to needs; the preparation volume is small; it is conducive to the hygiene of the preparation. Spray drying equipment usually consists of drying chamber, nozzle, air filter, preheater, gas and powder separation chamber, collecting bucket and blower. Sprayer is a key part of spray drying equipment, it affects product quality and energy consumption. There are three types of small spray dryers commonly used in laboratories: pressure small spray dryers, air stream small spray dryers, and centrifugal small spray dryers. Pressure-type small spray dryers are widely used and are suitable for viscous liquid medicines with minimal power consumption. The airflow sprayer has a simple structure and is suitable for any viscosity or micro-solid liquid medicine. The centrifugal sprayer is suitable for drying high viscosity or solid particles, but the cost is higher. In addition, there are flow granulation dryers, powder spray towers and automatic batch spray dryers suitable for teaching and scientific research. The simple process of spray drying is: medicinal materials—→extraction—→concentration—→spray—→collect medicinal powder. Specific operation process (pressure spray drying)
