Fabricantes de Equipamentos de Secagem Alimentar

Food drying machinery — types and selection

Food drying removes moisture from food products to extend shelf life, reduce weight for transport, produce functional food ingredients (powders), or prepare products for secondary processing. The key dryer types for food applications include: tray (cabinet) dryers (food on trays in an insulated cabinet with circulating hot air — batch operation; suitable for small volumes, multiple product types, or high-value products where dedicated equipment is not justified); belt dryers (product on a slow-moving conveyor belt through a long drying chamber — continuous operation; suitable for pieces, slices, or chunks that cannot be fluidised); tunnel dryers (similar to belt dryers but with distinct temperature zones along the tunnel length — permits more controlled drying profile); fluid bed dryers (hot air passes upward through a perforated plate, suspending and drying small particles, granules, or powder — used for instant food powders, granulated sugar, starch, and small particulates); spray dryers (liquid product is atomised into a hot air stream, producing powder in seconds — standard for milk powder, instant coffee, and other spray-dried food ingredients); and freeze dryers (product is frozen, then moisture is removed by sublimation under vacuum — produces the highest-quality dried product but requires the most capital and energy).