This is basically a conduction dryer. Hollow drum is heated from inside by a heating medium, typically steam and wet material to be dried is applied on the drum surface in form of thin film by dipping the rotating drum in feed tray. Material film dries to the final moisture level and is scrapped off.
The material can also applied on the drum surface by applicator roller. The layer of the feed formed on the drum in scraped out as dry material by the scraper blade.
The rotating drum is heated with steam at prescribed pressure and condensate drainage is ensured. The feed is admitted in the gap between the drum and the applicator rollers. The layer of the feed formed on the drum is scraped out as dry material by the scraper blade. The dry material falls into the breaker, conveyor and discharged at the end from where it may be collected.
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Jyoti Vijay Mundle
Arrowhead Seperation Engg. Pvt. Ltd.