Sweet potato starch production line adopts the wet milling process for making starch from sweet potato. During the sweet potato starch production, Doing Company does not need add any additives in the whole process.

The whole sweet potato starch production line machines includes: Raw material transportation, sweet potato cleaning and washing unit, crushing and milling unit, starch separation unit, desanding unit, starch milk refining unit, dewatering unit; starch drying unit, sieving and packaging unit .

Sweet potato & sweet potato starch

Here is the introduction of professional sweet potato starch production line:

(1) Cleaning and washing unit

Sweet potato is transferred into the screw de-stone machine to be cleaned by washing conveyor. Most of sand and stone are removed out by de-stone machine. The sweet potato then goes into the next washing conveyor. During the transportation in sweet potato starch production line, the sweet potato will be washing again and again, and some peel of sweet potato is also peel off.  Multi-stage washing and de-stone machine will make the potato thoroughly cleaned and then sweet potato is transported to the crushing and milling unit.

(2) Crushing and milling unit

The crushing and milling unit is the most important step for extracting potato starch in sweet potato starch production line. The cleaned sweet potato will be transport into crushing and milling machine. Highly-efficient crushing and milling machine will release the starch in sweet potato at most. Then  the sweet potato slurry will be pump to next process.

Sweet potato cleaning and washing process

(3) Centrifugal extracting unit

The sweet potato slurry is transferred to 4-5 stage centrifugal sieves, each sieve works with a fiber pump and a defoam pump. The  sweet potato slurry enters into each sieve to separate residue and starch in sweet potato starch production line. After 3 stages continuous washing and separation, the filtrate is sent to desanding unit, and the residue is sent to the residue dewatering unit.

(4) De-sanding unit

After separated with the residue, the crude starch milk is transferred to de-sanding cyclone by  pump. The desanding cyclone divide the milk into two parts in sweet potato starch production line: the light part  which contains the mixture of starch will go out from top of the cyclone, and the heavy part which contains the sand will be discharged out of the system.

(5) Concentration and refining unit

The starch milk after desanding process  goes into the 18 stages of refining hydro-cyclone, and fresh water comes into the cyclone from the end of system in sweet potato starch production line. Firstly, starch milk is pumped into 3 stages of concentration unit to remove the water, then the condensed starch milk enter the next 15 stages of washing unit . Most of the effluent with fiber is discharged out of the process, and a little part goes back to the process water system. Finally, the condensed starch slurry is pumped into the starch slurry storage tank.

Sweet potato starch production process

(6) Vacuum dewatering unit

The starch slurry is pumped into inlet tank of vacuum dewatering machine in sweet potato starch production line. Then the vacuum rotary drum will adsorb the starch on the drum surface and the filtrate is transferred out of the system by filtrate pump. The filter cake on the drum will be peeled off by peeler and then transferred to the air flash dryer by screw conveyor.

(7) Air drying unit

After dewatering process in sweet potato starch production line, the air flash dryer will dry the starch to the required moisture of the commercial starch. Then sweet potato starch will be packed into bags for sale or storage.

The sweet potato starch production line also can used for making starch from cassava or potato.

If you interested in DOING sweet potato starch production line, please contact with us freely.