Scraped-surface heat exchangers



Scraped-surface heat exchangers, using indirect heat transfer, consists of a product flowing through a product tube, with the heating or cooling media flowing around that product tube through a “jacket”. The separation of heat or cooling media and product is the defining attribute of indirect heat transfer systems like scraped-surface heat exchangers. Scraped-surface heat exchangers are also defined by the rotating blades on the mutator shaft within the product tube. The mutator shaft and the blades rotate to remove product from the heat transfer wall, reducing the chance for fouling and enhancing heat transfer. Scraped-surface heat exchangers are often used in heating, cooling, crystallization, pasteurization, sterilization and gelatinization processes.