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potato starch making machine in china

Release Time:2020-06-19 17:15Author:sd888Source:未知

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The potato starch processing equipment completes three processes of coarse crushing, fine grinding, and pulp residue separation at one time, without manual production, which causes starch color deterioration and darkening. The starch residue is filamentous under the microscope, which is conducive to starch free from the fiber Come out, effectively improve the starch extraction rate. It occupies a small area, uses fewer people, has less labor intensity, and has a high degree of automation. From excavation, potato washing, and drying to one-stop production, it has low energy consumption, water, electricity and processing costs. Because the potato starch particles are large and the potato starch particles are small, using the existing equipment to process potato starch is easy to reduce the powder yield and increase the number of equipment failures. The potato starch processing equipment is our company's technical advantage, which not only guarantees the mechanized production and the high quality of starch, but also makes the equipment investment relatively small, that is, the best cost performance is achieved.
Starch is the most important nutrient in potatoes. After the potatoes are harvested, most of the energy required to sustain life activities comes from the oxidative decomposition of their own stored starch. Experimental studies have shown that the potatoes are naturally placed for 60 days after harvest, the starch drops by 10%, and the starch content changes significantly after 100 days. Therefore, the purchased potatoes should be processed as soon as possible to reduce the storage time, and the processing should be controlled within seven days as far as possible. For the naturally placed potatoes, the longest should not exceed two months to reduce losses.
Potato starch production line process
(1) Weighing/conveying
The potatoes are weighed and weighed and stored in the potato yard. The potatoes pass through the flow trough and are transported by a set of potato pumps to the stone remover, where the stones and other heavy objects are separated.
(2) Stone removal/cleaning
The stone-removed potatoes are cleaned in a squirrel cage washing machine. In order to achieve a better cleaning effect, a secondary cleaning machine is required. The washed potatoes are transported to the temporary storage hopper by the inclined belt conveyor.
(3) Separation of impurities
Floating impurities such as leaves, branches, wood and other debris will be removed through the separation grid. Dirty wash water (sewage) will pass through the sedimentation tank to remove smaller impurities, and overflow will be discharged.
(4) Discharge screw
The temporary hopper should be able to store the potato raw materials needed for production for about one hour. The specially designed discharge port is connected to the discharge conveyor screw. The speed of this discharge screw is infinitely adjustable, so the production capacity of the production line can be adjusted through this screw. The outlet of the conveyor screw is connected to the file grinder.
(5) File grinding
Since the filing efficiency (the percentage of free starch available) is critical to the overall system yield, the filing machine has been specially designed to achieve the highest possible filing efficiency.
(6) Desanding
The potato starch emulsion from the filer is sent by a screw pump to a sand removal cyclone to remove sand particles.
(7) Fiber extraction
The starch emulsion from the sand removal unit is sent to the extraction unit. The extraction unit is integrated, including 3 conical rotary centrifugal screens, fiber pumps, and defoaming pumps. The fibers are washed and separated in a countercurrent manner by the cell fluid from the multistage cyclone in this 3-stage sieve. The separated fiber enters the potato residue dehydration sieve for dehydration.
(8) Refined
The starch milk from the first-stage centrifugal sieve enters the 16-stage concentrated cyclone washing unit, and the process water is pumped from the other end of the cyclone station to wash the starch in a counter-current manner. The entire cyclone station can be divided into three parts. First, the starch milk is de-juiced and concentrated through the concentrated cyclone station. The concentrated starch milk enters the subsequent 13-stage washing unit, and the cell liquid from the overflow enters the recovery cyclone station. Recover the starch contained in it. The starch milk from the swirl station is pumped into a stainless steel starch milk storage tank with a stirrer.
The clean process water is added from the last stage of the cyclone station, mixed and washed with starch milk, and then overflowed and separated with the previous stage of starch milk, so that the first-stage countercurrent washing makes the fibers and cell fluids are discharged with the water Swirl station. The 13-stage washing can ensure the washing effect of the cyclone station, better remove the impurities such as fiber and protein contained in the starch milk, and ensure that there is no impurity in the starch milk coming out of the cyclone station. In this way, it can be ensured that all indexes of the produced starch meet the standards.
(9) Dehydration of starch
The moisture content of starch milk coming out of the cyclone station is too large to be directly dried. Therefore, the starch milk needs to be dehydrated to make the starch moisture content about 40%. Starch milk is pumped into the vacuum dehydrator tank from the starch milk temporary storage tank by a starch pump, a water pipe is connected to the starch milk pipeline, and the process milk is used to dilute the starch milk to a certain concentration. The vacuum pump creates a negative pressure in the vacuum drum. When the starch emulsion level contacts the vacuum drum, the starch milk is sucked on the drum surface, the filtrate is sucked into the filtrate separation tank and is pumped away by the filtrate pump, and the filter cake is scraped down by a scraper , Use the food-grade conveyor belt to convey the feed hopper of the airflow dryer.
(10) Starch drying and packaging
The dehydrated starch cake is transported to the inlet of the airflow dryer through the conveyor belt, and enters the lifter through the feeder. The heat source of the airflow dryer is a steam heat exchanger. The wet starch is heated by hot air and the water is evaporated. After drying, the starch is separated from the air in a cyclone separator. At the bottom of the cyclone separator, a wind trap is used to seal. The wet air leaves the cyclone and is discharged to the atmosphere through the exhaust. The collected starch is conveyed by a screw conveyor to a vibrating screen unit to sieve out coarse particulate matter from refined starch. The sieved refined starch is transported to the starch silo, temporarily stored and cooled. Afterwards, it is transported to a semi-automatic packaging machine and packed into 25 kg of finished products.

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