Rotary drum dryer Bartlett-Snow™

rotary drum dryer
rotary drum dryer
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rotary drum


Bartlett-Snow™ rotary dryers are offered in two basic designs, directly and indirectly heated. These designs are readily adaptable to a wide variety of processing applications and are offered as stand-alone units or as part of complete thermal processing systems. Bartlett-Snow™ Directly Heated Rotary Dryers The direct heat dryer design consists principally of an inclined rotating cylinder with internal flighting. This type of design brings process material into direct contact with the drying medium, either in a concurrent or countercurrent flow configuration. The drying medium may be products of combustion tempered with air, heated clean air or special gases. Direct heat rotary dryers are most appropriate when product characteristics reflecting particle size range, specific gravity, and shape permit reasonable drying air velocities through the cylinder, as well as for applications involving product temperatures upwards to 930°F / 500°C. Typical materials processed in direct rotary dryers: Alumina , Ammonium Nitrate, Ammonium Phosphate, Granulated Fertilizers, Urea, Food Products, Titanium Dioxide, Proppants, Sand, Clay, Metal Scrap, Pigments Bartlett-Snow™ Indirectly Heated Rotary Dryers The indirect heat rotary dryer design provides for heating under oxidizing, reducing, or inert atmospheric conditions. The rotary dryer design consists principally of a rotating cylinder that is enclosed in a furnace along its active length. With heat transfer indirect and through the cylinder wall, the gas velocities within an indirect dryer are low as compared to a direct heat dryer, and correspondingly, the off-gas system is smaller and more economical.


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