Closed loop drying system
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Closed cycle spray dryerThe closed-circuit spray drying system means that the drying medium circulates in a closed loop throughout the drying system, and uses inert gas instead of air as the drying medium. The inert gas is generally nitrogen. Inert gas can be recycled in the drying system and plays the role of heat transfer, moisture carrying and dehumidification. The drying system is often operated under positive pressure. If the internal pressure drops, the pressure transmitter can automatically control the entry of nitrogen to ensure the balance of the inert gas concentration in the system and control the oxygen content. The closed-circuit spray dryer is particularly suitable for drying materials containing organic solvents, as well as materials containing toxic gases or that are prone to oxidation during the drying process.read more -
Closed circuit circulating fluidized bed drying systemClosed-circuit circulating fluidized bed drying can well solve the drying problem of special materials. In modern industries, such as petrochemicals, fine chemicals, pharmaceuticals, pesticides, intermediates, bioengineering and other industries, there are many special materials that are sensitive to heat, or contain flammable and explosive solvents, or are prone to hygroscopic degeneration when exposed to the air. Their heat resistance is very poor, but the moisture content of the dried products is very strict (for example, it needs to be controlled below 0.1%), and the products are required to be dried evenly. This equipment has the advantages of high drying rate, good product quality, solvent recyclability, safety, and environmental protection.read more