The working principle of the low-temperature spray dryer is that the air passes through the filter and the heater and enters the air distributor on the top of the dryer, and the hot air enters the dryer evenly in a spiral shape. The material liquid is pumped from the material liquid tank through the filter to the centrifugal atomizer at the top of the dryer, so that the material liquid is sprayed into very small mist-like droplets. Dry into the finished product.

Spray drying is a method used to dry materials and is widely used in the pharmaceutical industry. In recent years, with the rapid development of the pharmaceutical industry, the market size of spray dryers has also ushered in a good growth.

The problem of rapid drying of heat-sensitive materials has always plagued many scientific researchers. Common vacuum drying and spray drying have great damage to the biological activity or material structure of the material. The freeze-drying time is long, the energy efficiency is low, and after drying The material is lumpy and needs to be crushed a second time.

After long-term contact and research by scientific researchers, an innovative low-temperature spray dryer was born. It is reported that this dryer can make the easily oxidized, volatile, and heat-sensitive substances maintain good chemical structure and biological activity, and are suitable for drying liquids such as emulsions, suspensions, pastes, and solutions.

Compared with ordinary dryers, low-temperature spray dryers have several advantages. First, the drying speed is fast. The drying speed of the low-temperature spray dryer is very rapid. After the material liquid is sprayed, the surface area is large, and it can evaporate instantly in the high-temperature air flow.

Second, the product quality is good. The temperature range of low-temperature spray drying is very wide. Even if high-temperature hot air is used, the exhaust temperature will not be very high. In the early stage of drying, the temperature of the material does not exceed the humidity of the wet bulb of the surrounding hot air. For example, defects such as protein changes, vitamin loss, and oxidation are not likely to occur. The quality of heat-sensitive materials, organisms, and drugs can basically be close to the standard of drying under vacuum.

Third, it has good dispersibility, fluidity and solubility. It is reported that because the drying process of the low-temperature spray dryer is completed in air, the product can basically maintain a spherical shape similar to droplets, with good dispersibility, fluidity and solubility.

Fourth, easy operation and control. Low temperature spray drying is usually used to process solutions with a moisture content of 40% to 60%. Even if the moisture content is as high as 90%, it can also be dried into a powder product at once without concentration. Most products do not need to be crushed and sieved after drying, which reduces the production process and simplifies the production process. In addition, the particle size, bulk density, and moisture of the product can be adjusted within a certain range by changing the operating conditions, and the control and management are very convenient.

Fifth, improve the environment. Since the low-temperature spray drying is carried out in a closed drying tower, this prevents the dried product from flying in the workshop. For odorous materials, the production process of the closed circulation system can be used to burn down the odorous gases to prevent atmospheric pollution and improve the production environment.

Sixth, suitable for continuous mass production. Spray drying can meet the requirements of large-scale production in the industry. The continuous drying of the dried products can be combined with the cooler and wind power in the post-processing to form a continuous production line.