FEECO has introduced their counter-flow rotary cooler to the ethanol industry. Counter-flow cooling is recognized as the most efficient cooling alternative and possesses inherent advantages, which cannot be achieved with other cooling approaches. FEECO has over 40 years experience designing and fabricating counter-flow rotary drum coolers and rotary dryers. FEECO combines this expertise with a reputation for robust construction to provide an efficient, effective counter-flow cooler.

Counter-flow cooling outperforms cross-flow (fluid bed) or co-flow (negative lift) cooling with the following benefits:

• Improved product quality
• Lower DDGS discharge temperature
• Lower operating costs
• Less cooling air required
• Reduced storage problems (mold, mildew, etc)
• High reliability and low maintenance
• Reduced dryer energy requirements

Principle of Operation Counter-flow cooling uses air moving in the opposite direction to the DDGS flow. The DDGS discharging from the dryer is exposed to the warmest air available within the cooler, minimizing the temperature shock. As the DDGS travels the length of the cooler it is continuously in contact with the cooler air. Utilizing special design techniques, DDGS discharge temperatures within 10°F of the ambient air temperature can be achieved, without mechanical cooling. The gradual heat transfer enhances the product quality and provides cooler, more stable DDGS.