You dry the air. Is that all? It's like you have humidified, cooled, heated, accelerated, condensed and dedusted it.

Many processes in the food industry dry their products using air.  It is important for the air to be clean, to have the correct temperature and humidity and to be supplied at the optimal speed. As food products are involved, it is vital for the air to be exceptionally clean. The production of powdered milk also involves dry air. By evaporating water from the milk first, the milk condenses. A dry tower sprays the condensed milk like a fine mist. As the milk droplets fall, clean, warm and dry air remove the water even further until dry milk powder is left at the bottom of the dry tower.