A multiple-effect evaporator is an apparatus for efficiently using heat from steam to evaporate water. In a multiple-effect evaporator, water is boiled in a sequence of vessels, each held at a lower pressure than the last. Because the boiling temperature of water decreases as pressure decreases, the vapor boiled off in one vessel can be used to heat the next, and only the first vessel (at the highest pressure) requires an external source of heat and thus saves energy and overall operational cost.
Industries such as pharmaceuticals, food processing, chemicals, and specialty materials utilize the ATFD for its ability to achieve high levels of moisture removal while maintaining product integrity and quality. Its efficiency, reduced energy consumption, and versatility make it a preferred choice for drying a wide range of materials in various industrial applications.