The closed cycle spray drying system works in a closed environment. The drying medium is inert gas, usually N2, which is suitable for drying materials containing toxic gas or materials prone to oxidation during the drying process.

What are the advantages of the closed cycle centrifugal spray dryer? as shown below

(1) The condensation system and recovery system equipped with a solvent for drying the material liquid in the system can enable the solvent in the drying material liquid to be recycled through secondary treatment. The drying of the material (solvent removal) is completed in a closed state and nitrogen environment in a hot state, and the solvent is recovered through the condenser. The safety of the whole machine is high. At the same time, the equipment is designed to be fully enclosed, with a high material recovery rate. The high yield of this equipment system cannot be achieved by other types of dryers. Main technical indicators: dry powder material recovery rate ≥ 95%, product residual solvent ≤ 2%, thereby greatly reducing production costs;

(2) Using inert nitrogen as the drying medium gas, it is resistant to poisoning, oxidation, and explosion. The gas can be reused after being loaded and dehumidified;

(3) Spray drying is usually used to treat solutions with moisture content of 40% -60%, which can be dried into powder products at one time. Most products do not need to be crushed and screened after drying, thus reducing the production process and simplifying the production process. At the same time, the product has good dispersibility, flowability, and solubility. Due to the drying process being completed in air, the product naturally maintains a spherical shape similar to droplets and has good flowability;

(4) The connection of each pipeline in the closed system adopts a sealed structure with good sealing performance, which can ensure that the system has no leakage under a pressure of 0.2MPa and high thermal efficiency;

(5) The drying speed is very fast. After spray, the surface area of the feed liquid increases. In the high-temperature airflow, 95% -98% of the moisture can be evaporated instantly. The drying time is generally about 5-40sec.