(1) Pre-gelatinization reaction: The refined starch is sent to the buffer tank to obtain qualified DS and pH values, and then sent to the reaction tank. This reaction is a key process in the production of modified starch. According to the requirements of the reaction, add some chemicals into the measuring starch milk and heat it to a suitable temperature (40-50℃), usually to make the starch and chemicals react. In order to control a certain reaction temperature, it is necessary to cool the reactants. The reaction time is generally 3-24 hours according to different needs. After the reaction was completed, the reaction was stopped by adjusting the pH value.
(2) Washing: It is necessary to wash the reactants, because some chemical substances that are not fully reacted and some harmful impurities produced in the reaction. Different products should adopt different cleaning techniques and equipment. Usually, cyclone or screen cleaning is necessary, and 4-6 steps of washing are required to obtain qualified modified starch.
(3) Dehydration: The good modified starch after washing needs to be dehydrated to obtain a qualified moisture content in the starch milk. This task requires centrifuge equipment.
(4) Drying and packing: Modified starch is dried by air dryer. According to the particle size requirements of the product, the unqualified coarse starch in the drying system should be broken into qualified starch. After Z the product cannot be packaged until the product meets the demand. Then manually or mechanically pack into 25kg/bag.
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