Outlined

Closed-circuit centrifugal spray dryer is special equipment for drying organic solvent slurry. The unit is made of nitrogen (or other inert gases) as the drying cycle gas, drying process materials can prevent oxidation. At the same time the organic solvent can be recovered. Closed cycle spray dryer is generally used for powder drying of organic solvents such as ethanol, acetone, hexane and other organic solvents to prepare slurry, the equipment adopts explosion-proof design, drying process safety and environmental protection.

Main uses

Closed-circuit centrifugal spray dryer, the equipment is suitable for drying process to prevent oxidation, after drying powder consistency requirements. Such as pharmaceutical, chemical, food, lithium materials and other industries powder. Through the centrifugal spray can get the average particle size of 10-100μm powder. Of course, the whole drying process is completed under the protection of nitrogen, organic solvents can be recycled at the same time.

Working Principle

Closed-circuit centrifugal spray dryer system is working in a closed environment, the drying medium for the inert gas, generally N2, suitable for organic solvents in the drying of materials with poisonous materials or drying process is prone to oxidation of the drying of the material drying; the system adopts inert gas as the circulating gas, the drying material has a protective effect, the circulating gas through the wetting, dehumidification process, the media can be re-used; nitrogen gas Nitrogen heated by the heater into the drying tower, the liquid material is transported to the centrifugal nozzle by the screw pump, the liquid is atomized into liquid droplets by the high-speed circulation of the atomizer, in the drying tower to complete the process of heat and mass exchange, the powdered material is dried from the bottom of the tower discharged by the evaporation of organic solvents in the fan under the pressure of the pressure of the negative pressure of the dust in the gas clamped by the cyclone, the spray tower dust removal and then saturated with organic solvents by the condenser gas condensation into liquid discharged through the Condenser condensation into liquid discharged condenser, non-condensable gas medium continuously heated as a dry carrier in the system to re-circulate. The conventional ordinary centrifugal spray drying is through the continuous delivery, exhaust air to achieve the purpose of moisture removal, which is also explosion-proof closed centrifugal spray drying equipment and ordinary centrifugal spray drying equipment, a clear difference; drying system drying medium for the N2, the internal operation of the positive pressure, to maintain a certain value of the positive pressure, if the internal pressure drops, by the pressure transmitter to automatically control the amount of N ₂ into the system to ensure that the pressure balance.

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