How to prepare starch from potato ?
First, the production process for how to prepare starch from potato:
Cassava - transportation - de-stone - drum washing - crushing - fiber separation - sand removal - protein separation - dehydration - feeding - starch drying - air cooling - finished products screening - packaging
Second, the main equipment used for how to prepare starch from potato:
Conveyor - dry sieve - potato washing machine - rasper - centrifuge sieve - desander- hydrocyclone station - vacuum filter - flash dryer - starch sieving machine - automatic packing machine
Machines for how to prepare starch from potato
Third, the detain introduction of how to prepare starch from potato
1. The choice of raw materials
For the production of how to prepare starch from potato, potato varieties with high unit yield, strong disease resistance, large potato, high starch content and fresh ungerminated varieties should be selected.
2. Potato de-stone and washing stage
The de-stone process mainly removes impurities such as small stones, gravel, potato leaves and other debris. The pretreatment of potato facilitate the washing stage and reduce the load of washing machine. The washing is mainly used to wash away the sediment, soil and the like attached to the potato skin. It is required to wash the surface without clay for subsequent processing steps for how to prepare starch from potato .
There is no special requirement for washing water, but from the crushing operation, all processing water should be soft water.
3. Potato crushing stage
The starch granules of the potato are suspended in the cell juice of the parenchyma cells, so separation is easier than grain starch. The greater the degree of crushing, the higher the rate of starch extraction, and the crushing rate of potato is generally required to be above 90%. As one of the most important processes in the process of how to prepare starch from potato, crushing is related to the starch yield of fresh potatoes and the quality of starch.
Machine for potato cleaning, washing and crushing
4. Fiber separation stage
The starch slurry obtained by crushing is a milky colloidal solution containing starch granules, crude fiber, protein, and various soluble saccharide, organic acids and the like, as well as microorganisms and enzymes.
The fiber separation process for how to prepare starch from potato mainly removes the fibers in the starch slurry by principle of centrifugal force.
5. Desanding stage
Due to the specific gravity of sand is greater than that of water and larger than that of starch granules. According to the principle of separation of specific gravity, the use of cyclone to remove sand can achieve better results for how to prepare starch from potato.
6. Protein separation stage
The refining step is a key step in washing the starch milk, and determines the extraction rate of the starch. This section for how to prepare starch from potato mainly removes the protein and other impurities in the starch milk to ensure that the whiteness of the starch reaches the market standards. The quality of the washing water should be controlled (softening water hardness, impurities, etc.).
Equipment for potato starch separation, desanding and refining
7. Starch milk dehydration stage
The concentrated starch slurry still contains much water and needs to be further dehydrated to facilitate drying for how to prepare starch from potato. The moisture content of the dehydrated starch milk is about 38%.
8. Wet starch drying stage
At present, the starch starch processing plant generally adopts airflow drying (also called flash drying) for how to prepare starch from potato, and the entire processing time is completed in an instant which can effectively prevent gelatinization or degradation phenomenon.
Basic principle of drying: starch is dried by heat exchange in the drying tube by high temperature gas stream and the wet starch.
9. Dry starch packing stage
After drying, the starch is cooled by special cooling system for how to prepare starch from potato. Then the cooled starch can be packed into bags for warehousing.
Equipment for starch dehydrating and drying
Potato starch processing equipment processing capacity and production:
10 tons / hour production line: produce about 50 tons of refined potato starch per day;
20 tons / hour production line: produce about 100 tons of refined potato starch per day;
30 tons / hour production line: produce about 150 tons of refined potato starch per day;
40 tons / hour production line: produce about 200 tons of refined potato starch per day;
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