Automatic potato starch making process

The process route of the potato starch making process adopts the wet processing process of potato starch, which including raw material sorting, potato cleaning, paddle washing, grinding, starch slurry screening, bleaching, desanding, starch slurry concentration and refining, starch dewatering, the negative pressure air flow drying and drying.

Potato cleaning machine

1. Cleaning and washing: The purpose of cleaning and washing is to wash raw potato roots thorough multiple stage cleaning and washing process so as to fully wash the dirt, soil, sand and other skin sediment. Thus it can improve the purity of the raw material, and facilitate the next process in potato starch making process. And the widely used machine for this section is dry sieve and paddle washing machine. The main features of these machine are low water and power consumption, large capacity and easy handling.

2. Crushing: The role of crushing is to destroy the structure of potato, so that tiny starch granules can be disintegrated and separated from the roots of potato. In potato starch making process, the widely used potato starch processing machine for grating is rasper. The machine relies on high-speed operation to disintegrate potato so that the starch granules are continuously separated. And the disintegrated potato is processed into starch slurry by using water as a medium.

Potato starch separating machine

3.Separating and desanding: The separating process is mainly to separat the fiber from the starch.In potato starch making process, the used machine are centrifuge sieve and fine fiber sieve.This is another important procedure which determines the starch yield. So in order to reduce the loss of the starch, the separating process can be repeated for four times. But the separating procss can not remove the sand in the slurry.The high sand content in potato starch will result in poor taste and bad quality of starch.Therefore the desanding process is also important and necessary for how potato starch is made.

4. Concentration and refining: The function of this process is to remove insoluble protein and residual soluble protein and other impurities from the starch slurry, thereby achieving the purpose of washing, refining and concentrating the starch milk. At present, the hydrocyclone station is commonly used for washing, refining and concentrating in potato starch making process.

Potato starch drying machine

5.Dehydration section: Starch slurry stays in starch jar after refining in potato starch making process, and then is sent to vacuum filter for dehydrating. The wet starch water content after dehydration is 38-40%.

6.Drying and packing: After dewatering of potato starch making process, the starch cake is dried in the flash dryer. The wet starch is heated by the hot wind and the water evaporates. After drying, starch is separated from air in a set of cyclone separators. Then the wet air leaves the cyclone separator and is discharged into the atmosphere by the ventilator. While the collected starch is transported by the screw conveyor to the packing unit. And the finished potato starch will be packed for storage.

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