The NARA Media Slurry Dryer is designed for drying slurry materials continuously and obtaining powders without causing agglomeration, in a size of primary particles.
The slurry is pumped into the dryer. Inside the dryer there is layer of ceramic balls (Aluminium oxide) fluidized by hot air. The slurry becomes distributed on the surface of the balls due to the movement of the balls, induced by the air flow. The ceramic balls have a huge surface area, so that the liquid forms a thin film around them. The huge surface prevents the dispersed particles to touch each other. The hot air evaporates the liquid and the particles peel
off the surface by the movement of the ceramic balls and the air flow. The moist air is then separated from the particles by a cyclone or bag filter.
The collected particles are dried and have not agglomerated, because when they were in the process of drying, they did not touch each other.
|Dispersion + Adhesion||Drying + Cracking||Peeling + Discharging|
|Slurry is supplied directly into fluidized media particles by pump and will be dispersed as adhering to the media surfaces in a thin film form.||As the dispersed slurry in the tower contacts to the hot air effectively, evaporation and drying will be carried out in a short time.||Solids remaining on the surface of media particles are peeled off from the surface by the friction of each media particle and discharged out of the tower entraining in the exhaust gas and collected as dried product at collecting equipment.|
|Material||Volatile component||Moisture raw material [%WB]||Particle diameter raw material [µm]||Hot air exhaust gas temperature [°C]||Dried products capacity [kg/h • m²]|
|Ceramics||Water||70 / 0.2||0.7 / 0.6||250 / 90||300|
|Barium sulfate||Water||40 / 0.1||1.9 / 1.7||150 / 65||750|
|Ferrite||Water||60 / 0.2||32 / 26||300 / 100||620|
|Barium titanate||Water||50 / 0.1||1.3 / 1.1||200 / 90||510|
|Polystyrene resin||Methanol||75 / 1.5||1.3 / 1.5||85 / 55||160|
|Glas powder||Ethanol||50 / 1.0||2.1 / 2.1||150 / 80||900|
|Ferrite||Toluene||50 / 0.8||7.3 / 7.6||150 / 90||450|