Seal circulation spray drying system works in a seal circumstance.
The drying gas is usually inert gas, such N2 . It's applicable for drying material with organic solvent, toxic
gas and the material easy to be oxidized. adopt inert gas as
circulation gas, so to protect the material to be dried. The inert
gas circulates after dehumidification process. N2 is heated and then enters into drying tower. Liquid material is
conveyed to centrifugal nozzle by screw pump, and then it's
atomized into the liquid mist by the atomizer, the heat
transferring process is finished in the drying tower. The dry
product is discharged at the bottom of tower, the evaporated
organic solvent is sucked by the vacuum generated by the fan. Power
or solid material will be separated in the cyclone and sprinkling
tower. The saturated organic gas is drained out after it's
condensed in the condenser. The gas not condensed recycles in the
system after it's heated continuously. Ordinary normal centrifugal
spray drying process is realized by air conveying and exhausting
process. This is the obvious difference between explosion proof
type sealed circulation centrifugal spray dryer and ordinary
centrifugal spray dryer. The drying media in drying system is N2 , the interior is under positive pressure. To keep positive
pressure stable, the pressure transmitter controls the inlet amount
of N2 automatically.
dried powder collecting≥ 95% remanent disolvent≤ 2% oxygen contents≤ 500ppm explosion-proof of electric componentsEXDIIBT4 system conditionpositive pressure Yangzi Raver Pharmcy Group Shanghai Lide Catalyst Co., Ltd. Shanghai Research Institute of Chemical Industry | 
