Sweet Potato Starch Processing Plant

The processing of sweet potato starch is a physical process of separating cellulose, inorganic salts, proteins and other substances in sweet potato raw materials from starch granules by using professional starch extraction equipment based on the nature of starch insoluble in cold water and having a specific gravity greater than water. In the process of processing, a lot of water will be used, and finally the starch is separated from the water suspension by means of professional dehydration and drying to obtain dry and delicate pure dry starch. In this complete production and processing process, a variety of equipment with different functions will be used, and different sections and different equipment will perform their duties to extract starch quickly and effectively. So what equipment does a complete sweet potato starch production line include? In actual processing, must all equipment be purchased and used?


The complete process of automated sweet potato starch processing includes: sweet potato washing machine-crushing-sieving and filtering-desanding and desilting-concentration and refining-dehydration-starch drying. In the actual sweet potato starch processing and production, because everyone decides to use different starch production processes, The performance, quantity and configuration of the matched equipment are also different. However, not everyone has to purchase a complete set of equipment, and it is necessary to choose starch equipment based on personal capital investment, processing volume, site, and processing technology. First of all, let you know what equipment is included in each processing section, so that you can choose the one that is suitable for your use.

1: Sweet potato washing machine part

The purpose of cleaning is to remove the silt from the epidermis of sweet potatoes, reduce the difficulty of subsequent crushing and purification, and help ensure the starch taste. There are many cleaning methods, corresponding to cleaning equipment with many different functions: dry cleaning machine, stone cleaning machine, paddle cleaning machine, inclined squirrel cage cleaning machine, conveyor. This can be based on the size of your processing and the desired cleaning effect to select the required equipment, no rigid requirements.

2: Sweet potato crushing machine(starch extraction machine)

The purpose of disintegration is to destroy the tissue structure of sweet potatoes, so that the tiny starch granules can be smoothly disintegrated and separated from the tuber. Crushing is a very important part of starch processing, which is directly related to the powder extraction rate, starch output and quality. Generally, users are advised to choose a sweet potato extraction machine with large processing capacity, good performance, thorough crushing and high extraction rate when crushing. Goodway sweet potato crushing equipment  mainly has two types:

1. Curved-net extrusion type sweet potato starch extraction machine:

The king-brand crusher developed with great concentration. It can process 3-10 tons of fresh sweet potatoes per hour. The unique nail piercing roller is hard and wear-resistant, crushing finely and evenly, ensuring continuous operation. Multi-stage combined sorting crushing can fully release free starch particles.

2. Overflow panning type sweet potato starch extraction machine:

It processes 2-3 tons of fresh potatoes per hour, which is more suitable for small processing workshops. The equipment occupies a small area, has sufficient power, simple operation and good filtration rate.

3: Screening and filtering part

As the name suggests, the purpose of filtering sweet potato residue impurities is to purify starch and remove impurities such as sweet potato residue fiber remaining during crushing. The filtration equipment allows the starch slurry to pass through the screen mesh by means of non-pressure percolation, leaving the fine residue on the net, so that the extraction of starch from sweet potato is further. Different filter equipment meshes have different filtering effects. Mainly include: fine filter and hexagonal micro filter. The more filtering passes, the higher the purity of starch, and the user can choose how many filtration equipment to purchase according to the desired starch purity.

4: De-sanding and de-silting part

The processing purpose of this section is to remove the fine impurities in the starch. The remaining silt and gravel will affect the taste of the starch. The use of a desilter remover can solve the problem of jerky taste of starch products.

5: Concentrated and refined part

The function of the starch cyclone station used in this step is equivalent to the sedimentation tank used in traditional starch processing. The purpose is to separate a series of non-starch substances such as yellow powder, protein and pectin in starch slurry. It's just that the traditional sedimentation tank process is replaced by modern machinery and equipment, which solves the problems of open-air static precipitation, the starch is easily polluted, the processing cycle is long, and the efficiency is low. The theory is that the more stages equipped in the starch cyclone station, the deeper the degree of starch concentration and refinement, the higher the starch whiteness, but we do not recommend to match too high a stage to ensure high-quality starch whiteness.

6: starch dewatering part

Wet starch is not easy to store, and needs to be dehydrated and dried before it can be packed and transported normally, which is convenient for subsequent use. The wet starch directly from the launder generally has a moisture content of about 55%, and the thick emulsion separated by a disc separator and a hydrocyclone is generally 20 Baume, which needs to be centrifuged again. The dehydration equipment mainly includes: three foot centrifuge, vacuum dehydrator. In sweet potato starch processing, a vacuum dehydrator is commonly used to dehydrate sweet potato starch, and the moisture content of the starch after dehydration is about 40%. Low speed, no noise, stable work, good work continuity and easy operation.

7: starch drying part

This section will dry the dehydrated wet starch, and it only takes 3-5 seconds to dry instantaneously. Then enter the weighing and packaging process. The equipment pipeline is long and the height is higher, the greater the drying capacity, the higher the equipment height. Drying equipment replaces the natural drying method, which greatly shortens the production cycle. In the peak season of starch processing, the production efficiency is accelerated, which can expand the production volume and bring huge profit margins.