Bartlett-Snow™ rotary coolers, both direct airswept and indirect water spray designs, are engineered to assure reliable operation, enhanced efficiency, maximum availability, and facilitate ease of maintenance. These features help make our rotary coolers the smart choice for your process solids cooling applications. Bartlett-Snow™ Direct Airswept Rotary Coolers The direct air swept cooler design consists of a rotating cylinder with internal flighting. This cooler design brings hot product into direct contact with the cooling medium, in a countercurrent flow configuration. The cooling medium may be ambient air, cooled air or special gases. The technology is particularly suited for applications involving cooling hot materials from 700ºC to temperatures within 5 to 10ºC of the ambient air temperature. Specialized cooler designs handling high temperature products to 1600ºC can also be provided. The hot process material is introduced into one end of a rotating cylinder where it is lifted on flights secured to the ID of the cylinder and showered through the cooling air stream. The air passes though the cylinder countercurrent to the material, thus providing the most efficient heat transfer and coolest product temperature. In special cases, the air for cooling can be refrigerated to remove moisture from the air or to cool the product below ambient temperature. If the material to be cooled is at an extremely high temperature, the feed end of the cooler can be refractory lined or fabricated from high temperature  alloys.  Used in series with a direct fired rotary dryer or rotary kiln, the hot air leaving the cooler can serve as preheated secondary combustion air, the resulting in reduced fuel usage. Bartlett-Snow™ direct airswept rotary coolers are available in sizes ranging from 18" to 156" in diameter, with lengths from 10’ to over 100’. Typical Materials Processed in Direct Airswept Rotary Coolers »   Alumina »   Ammonium Nitrate »   Ammonium Phosphate »   Granulated Fertilizers »   Urea »   Catalysts »   Food Products »   Titanium Dioxide »   Proppants »   Metal Turnings & Borings »   Pigments »   Various Rock Products Bartlett-Snow™ Indirect Water Cooled Rotary Coolers The Bartlett-Snow™ indirect water spray cooler design features a rotating cylinder housed along its active length in a water jacket. Arranged within the water jacket are series of water spray nozzles that direct cooling water over the exterior of the cylinder. Evaporation of the water cools the wall of the cylinder, which cools the material inside. Clean water is the recommended cooling media; however, special nozzles and water distribution systems are available for operations that require use of waste water or recirculated water that may have suspended particulate matter. Applications that are appropriate involve fine powders through granular materials at temperatures as high as 1300ºC, requiring cooling to as low as 100ºC. Should the process require inert, reducing, or special atmoshperic considerations, the cooler can be provided with gas-tight seals. Planetary and water bath cooler can also be supplied to address unique applications. Bartlett-Snow™ indirect water spray rotary coolers are available in sizes ranging from 6" to 120" in diameter, with lengths from 10’ to over 100’. Typical Materials Processed in Indirect  Water Spray Coolers »   Alumina »   Activated Carbon »   Rare Earth Compounds »   Manganese Oxide »   Catalysts »  Coke »  Ferrites »  Metal Scrap »  Pigments »  Metallic Oxides › Locate a Salesperson