Wheel dryers have replaced Dual Bed dryers in many applications

Desiccant wheel dryers have become the most popular dryer for many applications because of their more consistent temperature and dew point to the drying hopper. They use a “honeycomb” wheel, impregnated with a pure crystalline desiccant and there is less variation throughout the drying cycle because there is internal cooling after desiccant regeneration and bed-changeover is eliminated. This continuous process typically provides a compact unit with few moving parts and a constant source of -40°dew point drying air. 

Centralized Dehumidifying& Drying system