Direct Air-Swept & Indirect Water Rotary Coolers

Bartlett-Snow™ Direct Air-Swept Rotary Cooler

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 counter current 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 1290°F / 700°C to temperatures within 10-20°F / 5-10°C of the ambient air temperature. Specialized cooler designs handling high temperature products to 2910°F / 1​​600°C can also be provided.

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, resulting in reduced fuel usage.

Bartlett-Snow™ direct air-swept rotary coolers are available in sizes ranging from 18-156 in / 457-3960 mm in diameter, with lengths from 10 to over 100 ft / 3.04 m to over 30.48 m

Bartlett-Snow™ Indirect Water Cooled Rotary Cooler

The indirect water spray cooler design features a rotating cylinder housed along its active length in a water jacket. Arranged within the water jacket are a 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.

Appropriate applications involve fine powders through granular materials at temperatures as high as 2370°F / 1300°C, requiring cooling to as low as 212°F / 100°C. Should the process require inert, reducing or special atmospheric 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 6-120 in / 152-3048 mm in diameter with lengths from 10 to over 100 ft / 3.04 m to over 30.48 m.

TYPICAL MATERIALS PROCESSED -  INDIRECT WATER-COOLED ROTARY COOLER