Potato starch manufacturing equipment for making of potato starch
Potato have been used as a source of raw material for high-quality starch for over 150 years,In addition to product quality, the consumption of fresh water and energy are now playing an ever more important role in making of potato starch.
Potato & potato starch
Here are the introduction of potato starch manufacturing equipment for making of potato starch:
(1) Raw material receiving unit: The potato is carried besides the storage pool after weighing for making of potato starch. Firstly, it goes through the vibration sieve for removing the stones and sand. Then the pre-cleaned potato falls on the belt conveyer and enters into the storage pool, and the rubbish will be carried away by truck.
(2) Water transport unit: The exit of the storage pool is water transportation channel. The potato will be sent by water force into de-stone machine for making of potato starch. Meanwhile, the remaining sand and dirt will be again cleaned out by rolling and friction of this potato starch manufacturing equipment.
Potato cleaning equipment
(3) De-stone and washing unit: Potato is transferred into the screw destone machine to be cleaned by water flow. The small sand and stone go through the rotary screen then meet with bigger size stone which was stopped and sent back to the entrance of de-stone machine. Most of sand and stone are removed out of this potato starch manufacturing equipment. The potato then goes into rotary cleaning machine for further removing of dirt and broken chips for making of potato starch. Cleaned potato falls on a checking conveying belt equipped with nozzles for washing the surface of potato. Workers can manually take out the rotten potatos, wooden and plastic items. At the end of belt, the iron remover is installed for removing metal impurities. Then the potato is sent by bulk elevator into temporary storage in which it can stay 2 hours.
(4) Milling unit: The milling unit is the most important step for extracting potato starch. The feeding screw combined at bottom of the storage tank pumped the clean potato into milling machine. Highly-efficient milling machine will release the starch in potato at most.
(5) De-sanding cyclone unit: After milling, the starch milk is transferred to de-sanding cyclone by fiber pump for making of potato starch. The hydro-cyclone divide the milk into two parts: the light part which contains the mixture of starch and residue will go out from top of the cyclone, and the heavy part which contains the sand will be discharged out of the potato starch manufacturing equipment.
Centrifugal extracting equipment
(6) Centrifugal extracting unit: The mixture is transferred to the 3 stage centrifugal sieves, each sieve works with a fiber pump and a defoam pump. The mixture enters into each sieve to separate residue and starch for making of potato starch. After 3 stages continuous washing and separation, the filtrate is sent to concentration and refining unit, and the residue is sent to next potato starch manufacturing equipment for residue dewatering unit.
(7) Potato residue dewatering unit: The potato residue will be pumped to the centrifugal sieve for dewatering, the centrifugal sieve works like the extraction sieve. Then the screw conveyor discharges the residue out of the process in making of potato starch, and the water will go back to the process water system.
Potato starch drying equipment
(8) Concentration and refining unit: The starch milk from centrifugal sieve goes into the 16 stages of refining hydro-cyclone, and fresh water comes into the cyclone from the end of the potato starch manufacturing equipment for making of potato starch. Firstly, starch milk is pumped into 3 stages of concentration unit to remove the water, then the condensed starch milk enter the next 13 stages of washing unit, and the overflow enters into another 2 stages of recycle unit to recycle starch. 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.
(9) Vacuum dewatering unit: The starch slurry is pumped into inlet tank of vacuum dewatering machine for making of potato starch. Then the vacuum rotary drum of this potato starch manufacturing equipment 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 dryer by screw conveyor.
(10) Air drying unit: After dewatering process of making of potato starch, the flash dryer will dry the starch to the required moisture of the commercial starch. Then starch goes into the screw conveyor.
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