Multifunctional Process Unit for Drying and Mixing
To dry bulk material efficiently and with very low energy consumption, Dinnissen BV, Sevenum, Netherlands, equipped the multifunctional Pegasus mixer with a twin-axis paddle mechanism. This mechanism creates a mechanically fluidized zone that permits gentle, low-energy mixing. The two counter-rotating paddle axles throw up the materials being mixed with very low energy input (low shear). According to the manufacturer, this results in only minimum damage to the products. Exactly at the moment that the powder, pellets and granules are loosely thrown up, hot air is injected into or extracted from the process unit to facilitate drying. That can take place during or directly after mixing.
Under precisely these conditions, the suspended feedstock particles are very readily mixed with the hot, dry air. It completely surrounds each product particle. The hot air stream dries the feedstock particles uniformly. Because the dry, hot air is mixed with the feedstocks in the fluidized zone, no pressure is required. Moreover, only a small amount of hot air per hour is used and powder, pellets and granules do not clump together during drying. Due to the feed program,users can very easily simplify the drying function, mixing time and intensity. The mixer is thereby suitable for producing various products within a production line, and can be rapidly and easily converted to a different formulation. That also applies for small production quantities.
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