The document outlines the process of potato starch production using a specialized processing machine, detailing its efficient, low-consumption features and high-quality output. It describes the key production stages, including potato cleaning, crushing, starch extraction, fiber separation, refining, dehydration, and drying, along with technical specifications and performance indicators. The production line is designed to handle 500 tons of fresh potatoes daily, resulting in over 100 tons of starch, meeting various quality standards.

2. Potato starch processing machinein potato starch productionline
The main feature of the potato starch processing machine is that the entire production line
adopts a closed mode with low consumption, high efficiency and good product quality. In the
process of starch recovery and purification, a full hydrocyclone station is used, thus avoiding the
largeuse of moving parts. The entire process can be divided into the following units:
Potato starch production line
* Potato cleaning / de-stoneunit
Freshly harvested potatoes from the ground should first be sieved through a dry sieve to remove
as much impurities as possible, and then stored in a daily storage place. Then the potatoes are
sent to the destone machine by water, where debris such as sand, dirt, soil and others are
separated, while the potatoes are fed into drum washer. The drum washer should be cleaned at a
low level in potato starch production line. Then the potatoes which are thoroughly cleaned and
washed areconveyed to the storagehopper via a tilting belt.

3. Potato cleaning machine
* Crushing unit
The potatoes from storage hopper are fed to the rasper for crushing by a screw conveyor in
potato starch production line. The screw conveyor is adjustable so that it can adjust the amount
of potato fed. For some producer, in order to ensure the continuity of the production line, when
the first crushing machine replaces the saw blade, the second crushing machine is opened. The
saw blade working condition can be obtained from the ammeter.
Relatedreading: Potato starchprocessing technology in Pakistan

4. Potato crushing machine
* Starch extraction / fiber separation unit
The crushed starch slurry contains a lot of soluble and insoluble substances like protein, salt and
sugar and fibers, which are pumped into the first-stage starch extraction centrifugal sieve. The
wet fiber from the first-stage sieve is pumped to the second, third and fourth-stage extraction
sieves in potato starch production line for fiber separation.
* Sand removal unit
Then in the procedure for isolation of starch from potato, the starch slurry is sent to a stirred
starch tank, and then the starch is removed by a two-stage sand remover, and the collected sand
is discharged by a butterfly valve.

5. Starch extraction and desanding mahcine
* Concentrated refining unit
The starch slurry from the desanding cyclone is pumped into the hydrocyclone station. A
two-stage concentration cyclone unit is usually used in potato starch production line, where the
starch slurry is concentrated and the concentrated overflow is either collected and processed or
discharged directly. At this time, the starch slurry is washed and refined by countercurrent flow
with a 12-14 hydrocyclone station. The refining unit works fully automatically, and is equipped
with necessary instruments and meters. The refined and purified starch milk is collected into a
stirred starch tank.

6. Video: Potatostarch processing machine in plant overview
Hydrocyclone system
* Dehydration unit
After being refined, the starch slurry is dehydrated in potato starch production line by a peeler
centrifuge, and the moisture content of the dehydrated wet starch is 38-40%.

7. * Starch drying unit
Potato starch production line requires to dry wet starch to the moisture content of 14%. The
drying system is a suspension air stream drying characterized by a uniform mixing of the dried
product with hot air, the drying stream is highly efficient and the drying effect is good. The dried
product is collected by a high efficiency single cyclone and discharged by a low speed screw
conveyor. The finished product is conveyed by air flow or screw conveyor for cooling. The cooled
dry starch will be collected by a two-stage cyclone and sent to the sifter using a screw conveyor,
sieved and packaged.

8. Project: 30TPH potato starch processing plant project in Henan, China
Fourth, themain indicators in potato starch productionline:
This production line processes 500 tons of fresh potatoes per day (produce 100 tons of starch per
day)
The starch extraction ratewas >94%.
Potato rawmaterialrequirements:
starch containing > 15%, fresh, no mold, no soil, stones.
Water supply requirements:
turbidity <0.1, hardness <100, SO2 <0.55ppm, iron <0.9 ppm, no floating matter,
pressure >0.2MPa.

9. Standard forfinished starch:
moisture; 18-20%, fineness; 99.6 (100 mesh pass), protein; 0.1%, whiteness; 90% (475mn,
reflectivity), chemical SO2; 30 ppm, ash; Spot; 3 pieces. (fully in line with national first-class
standards)
Water consumption: 2 to 3T per ton of fresh potato
Power consumption: 220 kWh per ton of finished potatostarch
Coal consumption: 2T per ton of finished products consumption
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