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Difference between revisions of "Drum Dryers"
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Compared to spray drying, drum drying is a more intense heat treatment which results in more denatured proteins. The powder is less soluble as a result. The temperature uniformity of the heated roller/drum is poor so spray drying results in better quality milk powder. | Compared to spray drying, drum drying is a more intense heat treatment which results in more denatured proteins. The powder is less soluble as a result. The temperature uniformity of the heated roller/drum is poor so spray drying results in better quality milk powder. | ||
Other products where drumdrying can be used are for example starches, breakfast cereals, baby food, instant mashed potatoes to make them cold water soluble. | Other products where drumdrying can be used are for example starches, breakfast cereals, baby food, instant mashed potatoes to make them cold water soluble. | ||
===Operating Principle== | ===Operating Principle=== | ||
The '''Drum Dryers''' are basically a conduction dryer. Wet feed film (in liquid or paste form) is applied to the rotating metal cylinder inside which, a heating medium is supplied. Material film dries to the final moisture level and is scraped off. | The '''Drum Dryers''' are basically a conduction dryer. Wet feed film (in liquid or paste form) is applied to the rotating metal cylinder inside which, a heating medium is supplied. Material film dries to the final moisture level and is scraped off. | ||
===Special Features=== | ===Special Features=== | ||