Drum dryers were developed in early 1900s. They were
used in drying almost all liquid food materials before spray
drying came into use. Nowadays, drum dryers are used in
the food industry for drying a variety of products, such as
milk product, baby foods, breakfast cereal, fruit and
vegetable pulp, mashed potatoes, cooked starch, and spent
yeast.In a drying operation, liquid, slurry, or puree
material is applied as a thin layer onto the outer surface of
revolving drums that are internally heated by steam. After
about three-quarters of a revolution from the point of
feeding, the product is dried and removed with a static
scraper. The dried product is then ground into flakes or
powder. Drum drying is one of the most energy efficient
drying methods and is particularly effective for drying high
viscous liquid or pureed foods.
Drum dryers were developed in early 1900s. They were
used in drying almost all liquid food materials before spray
drying came into use. Nowadays, drum dryers are used in
the food industry for drying a variety of products, such as
milk product, baby foods, breakfast cereal, fruit and
vegetable pulp, mashed potatoes, cooked starch, and spent
yeast.In a drying operation, liquid, slurry, or puree
material is applied as a thin layer onto the outer surface of
revolving drums that are internally heated by steam. After
about three-quarters of a revolution from the point of
feeding, the product is dried and removed with a static
scraper. The dried product is then ground into flakes or
powder. Drum drying is one of the most energy efficient
drying methods and is particularly effective for drying high
viscous liquid or pureed foods.
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