The first step in producing starch dried potato is to clean it, use screening, air separation, magnetic separation equipment to remove impurities, then soak it. There are two soaking methods: one is to crush the dried potatoes before soaking them, the other is to soak the whole piece of dried potatoes in a container. 0.02mol/L saturated Limewater shall be added into the potato drying soaking water to make the soaking solution ph about 10, soaking time 12 hours, temperature 35-40 ° C. After soaking, the sweet potato contains about 60% water, then rinsed with water to remove pigments dust.

The processing process of soaked potato chips is the same as that of fresh potatoes. Sweet potato is a widely cultivated agricultural product in China, with a moisture content of 60% -80% a starch content of about 10% -30%. It also contains some soluble sugars some phenolic tannin substances, making it difficult to store. By using professional extraction equipment to produce starch sweet potatoes, we can extend the processing production cycle, enhance added value, derive products such as vermicelli vermicelli, greatly enhancing their utilization value.

Sweet potatoes are harvested too early, with insufficient maturity low flour yield; Harvesting too late is prone to frost also affects the flour yield. Early maturing varieties are harvested on September 10-20, while late maturing varieties are harvested 3-5 days before frost, resulting in a higher pollen yield. At this time, the temperature is suitable, the mashed sweet potatoes ferment quickly produce more starch. If the harvest time is too late the temperature drops, the starch in the potato block gradually transforms into sugar, resulting in a decrease in flour yield. If fresh potatoes are processed into dried potatoes, the flour yield will be greatly reduced.

The requirements for equipment in small-scale sweet potato processing are relatively strict, but how to choose a more suitable set of equipment depends on the equipment itself, whether the structure is reasonable, the equipment materials must be sturdy. Sweet potato processing equipment is a type of agricultural product processing machine,

Simply put, it is a type of agricultural machinery. For agricultural machinery, it is just about appearing to be usable being able to use it, but about how to improve the starch extraction rate of sweet potatoes when they are valuable. In terms of equipment maintenance, it is necessary to minimize maintenance trouble, in terms of replacing equipment parts, it is important to achieve the three points of 'easy disassembly', 'easy unloading', 'easy installation'.