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Liquid sugar and maltose production line

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MaltoseSyrup Production Line

• Promulgato：Yunhao
• Time：2017-10-26
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    1. Preparation of starch milk:  Refined starch from starch plant is dissolved into the water tank to be adjusted to 19～20Be, then add Na2CO3 to adjust the PH to around 5.4～6.0, and add α-amylase to be ready for liquefaction.

    2. Liquefaction: Pump the prepared starch milk to the 1st injector, which injects steam directly into the starch milk, making the temperature rise to 110℃ quickly. After entering the 1st flash evaporator, lower the temperature to 98℃ and keep it for a certain time. The material, with a lower viscidity after initial hydrolysis, is pumped into the 2nd injector, where its temperature reaches up to 135℃ quickly, then sent to the 2nd flash evaporator, where the temperature declines to 95℃. After subsequently staying in the tubular reactor for 90-120 minutes, the material has a DE value between 15 and 20.

    3. Saccharification: Add hydrochloric acid into the material after liquefaction and make its PH value to 4.0-4.5, while lowering its temperature from 90℃ to 60℃. Add Fungal enzyme into it and keep stirring with heat insulation. After subsequently 16 to 24 hours’ saccharification period, its DE value is 40-60.

    4. Refining: Through refining, the impurities, protein, fat, pigment, and edible salts are removed from the saccharification liquid. The material is first put into the vacuum filter, where the best temperature is 70℃ to 85℃ for filtration. With insoluble protein and fat separated, the clear and slightly colored saccharification liquid goes into carbon absorption unit, which further separates the insoluble protein and pigment. Keep adding in activated carbon at the temperature between 75℃ and 85℃ in order to make the material have full contact with carbon. Then send the material into filters to remove carbon, and into secondary filters to make sure that the outgoing material is free of carbon.

    5. Ion exchange: After filtration, amino acid and Inorganic salts are separated from the saccharification liquid. The material goes through ion exchange after being lowered to 48~50℃, firstly cation exchange resin, where Na, Fe, Ca, Cu and some amino acids are separated, and secondly anion exchange resin, where chlorides, sulfates, phosphates and most of the soluble amino acids are removed, which produces the refined saccharification liquid.

    6. Concentration: With DS about 30%, the purified liquid, after adjusting PH value, is sent into the falling film evaporator for concentration, which produces concentrated sugar liquid not less than 75% on dry matter basis.