Spray drying tower is a device that can complete drying and granulation at the same time. It is a common device in the fields of biological pesticides, medicine, food microorganisms, etc. Today, I will introduce the working principle and characteristics of spray drying tower.
Main functions: the material in solution state can be sprayed into the spray drying tower, and the material will be discharged in solid powder state after drying. According to the process requirements, the pressure, flow and orifice size of the feed liquid pump can be adjusted to obtain the required spherical particles in a certain proportion. Mostly used for drying biopesticides, pharmaceuticals, food microorganisms.
Working principle: After filtering and heating, the air enters the top air distributor of the dryer, and the hot air enters the drying chamber uniformly in a spiral shape. The feed liquid passes through the high-speed centrifugal atomizer or high-pressure atomizer on the top of the tower body, and the spray becomes a very fine atomized liquid bead, which can be dried into a finished product in a very short time in parallel with the air. The finished product is continuously output from the bottom of the drying tower and the cyclone separator, the fine dust material is collected by the pulse bag collector, and the exhaust gas is discharged by the fan.
Features of spray drying tower:
1. Fast drying speed, completed in just a few seconds;
2. Suitable for drying heat sensitive materials;
3. Widely applicable: Based on the characteristics of the material, it can be used for hot air drying, centrifugal granulation, and cold air granulation. Most products with significant differences in characteristics can be produced using this machine;
4. Due to the instantaneous completion of the drying process, the particles of the finished product can basically maintain a spherical shape similar to droplets, and the product has good dispersibility, fluidity, and solubility;
5. The production process is simplified and the operation control is convenient. Spray drying is usually used for solutions with a solid content of less than 60%. After drying, there is no need to crush and screen, which reduces the production process and simplifies the production process. Within a certain range, the particle size, bulk density, and moisture content of the product can be adjusted by changing the operating conditions, making control and management very convenient;
6. In order to prevent material contamination and extend equipment life, all parts in contact with the material can be made of stainless steel material.