The sweet potato starch processing production line includes equipment and sections as follows:
Fresh sweet potato (conveying machinery) – cleaning (dry sieve) – washing (rotary washing machine) – grinding (file) – separation of starch and slag (centrifugal sieve, fine fiber sieve) – sand removal (sand remover) – protein separation (hydrocyclone flow device station)-dehydration (vacuum filter)-drying (flash dryer)-packing (semi-automatic packaging machine)
The main purpose of cleaning is to remove the sediment on the sweet potato skin and wash the skin of the sweet potato root. Clean and fresh sweet potatoes or sweet potato slices as raw materials for the production of starch are the basis for ensuring the quality of starch. The cleaner the cleaning, the better the quality of the starch. Sweet potato washing machines are mostly horizontal drum and squirrel cage washing machines, relying on the motor to drive the gear to rotate the drum, so that the raw material is rolled up by the side drum, and the water is used as the drum. Medium for spraying, rinsing and bruising to remove deposits and sections of skin.
Crushing is one of the most important processes in fresh potato processing. It is related to the flour yield and starch quality of fresh potatoes. The crush requirements are:
1. Destroy the cells of fresh potatoes as much as possible and release more free starch granules. the
2. Easy to separate. Skin residues that are too fine, skin residues that are too fine to separate the starch from other components are undesirable, and the difficulty of separating fine residues increases. Sweet potato pomace is a fine fiber that is larger than a starch granule. The swelling coefficient is also larger than that of starch granules, and the specific gravity is lighter than that of starch granules. The disintegrated raw material slurry is treated with water as the medium, fully washed, pressureless percolation-extrusion, and then multi-stage circulation treatment. Elutriation is sufficient to release the starch from the fibers. Pressureless percolation allows the slurry water to pass through the screen holes and the fines remain on the screen. Squeeze to further filter out the starch slurry water contained in the potato residue. Dewatering Fundamentals Wet starch straight from the wash tank typically has a moisture content of about 55%. The concentrated slurry separated by the butterfly separator and the hydrocyclone is usually 20 waves, and all need to be centrifuged again to improve the drying efficiency and save energy.

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