METHOD AND APPARATUS FOR EXPANDING A PRODUCT CONTAINING STARCH

摘要

The invention provides a method and apparatus for expanding a product containing starch which provides a more efficient expansion of the product while reducing or avoiding undesired impacts on the taste or quality of the product. The method for expanding a product containing starch comprises the steps of subjecting the product to hot process gas in a high temperature zone (6) flowing in a downstream direction, such that the product is expanded by means of a thermal shock while the product is conveyed in the process gas in the downstream direction; and lowering the temperature of the process gas by injecting cooling medium through cooling medium inlets (7) while further conveying the product in the process gas.