This week’s photo is a 3D image of a rotary dryer flight curtain.
Flights, or material lifters, are affixed to the interior of a rotary dryer. They work by picking material up, carrying it over, and showering it through an airstream as the drum rotates. Flight design and placement should be customized around the material’s unique characteristics, and ideally, should create a “curtain” of material. This curtain refers to the span of material created as it is dropped from the flights; the material should span the width of the interior of the drum, evenly falling from one side to the other.
Efficient drying is the real criteria for performance, and cannot be accomplished without good distribution of material within the drum. In FEECO rotary dryers, “full curtain” flighting allows maximum impingement of the air stream on falling particles- a flighting design developed and proven in actual installations. Engineered not only for high thermal transfer rates, the flighting is designed for symmetrical drum loading and smooth performance. Special “kicker” flights move materials rapidly away from the charging end to avoid build-up, and possible leakage. The same general design and high efficiency distribution pattern is used in FEECO rotary coolers.
To learn more about FEECO’s custom rotary dryers, contact us today!