During powder drying processes using disc dryers, the exhaust steam is typically characterized by high temperature and high moisture content. Direct discharge leads to significant energy loss and often results in visible white plume emissions. By integrating a hydrophilic aluminum foil air-to-air heat recovery core, effective energy recovery and exhaust treatment can be achieved as part of an energy-saving system retrofit.
The heat recovery unit features aluminum foil plates with a hydrophilic coating, ensuring efficient condensate drainage during indirect air-to-air heat exchange. As the hot steam exhaust is cooled, sensible heat is recovered and reused to preheat incoming fresh or make-up air, while water vapor condenses and is removed, achieving simultaneous dehumidification and white plume reduction.
In disc dryer applications for chemical powders, food additives, mineral powders, and fine chemicals, this heat recovery core significantly reduces steam consumption, lowers the load on downstream exhaust treatment systems, and improves exhaust appearance and environmental performance, providing a stable and energy-efficient upgrade solution for powder drying operations.