Grape Juice Production Line
Grape juice are extracted from grape pulp. It plays an important role in wine industry, like wine and brandy. But sometimes it is made into drinks without alcohol.To get more news about potato grinding machine, you can visit hl-juicer.com official website.
The grapes for making juice are required to be fresh and mature, with good flavor. You should get rid of those unripe, overripe and mechanically damaged fruits, or they would contaminate the juice quality. It is better the process the grapes the same day they are picked. If you need to store them, keep the temperature at 0℃ and the moisture of 80%-85%.
To improve the efficiency of selection, experienced producers usually adopts grape vibration separator. It can transmit grapes and separate the unqualified grapes, stems and impurities with high-frequency vibration.
Grape juice is popular for its nutritive benefits and good taste. Nowadays, grape juice production has become a promising industry. In grape juice production process, pay attention to the following aspects:
Protect the flavor, taste, color and properties of grapes as much as possible
Prevent the fade of the pigment, and the precipitation of tartars.
The extracted grape juice must be pasteurized to prevent the fermentation of yeasts.
Prevent grape juice directly contact with iron, copper and other metals, in case they have chemical reactions.
Grape juice production process includes raw material selection, cleaning, sorting, stem removing, crushing, heating for color distilling, juice extracting, filtration, deploy, clarification, filling and sealing, pasteurization and cooling. The following are Grape juice making machines.
After selection, we need to clean the grapes with a fruit cleaning machine. A fruit surfing cleaning machine can scour the grape surface and remove the dirt with tumbling water, without damage to the grapes. To achieve better cleaning effect, you can dip the grapes in potassium permanganate solution for 3min and them rinse them with running water.
Grape Destemming
Grape stems account for 3-8% the weight of grapes. They are mainly made of lignin, with 1-2.5% tannin, 0.5-1.5% acid and a little bitter compound. They must be removed from grapes in case they contaminate the grape juice.
Grape destemmer is a specialized equipment to remove stems on grapes and protect the integrity of the grape grains. The crushing roller is made of non-toxic and high-elastic rubber, with no damage to the grapes. Then a single-screw pump transmit the grapes to the next process for juice extraction. The pore size of the drum sieve can be customized according to the size of grapes.
Grape juice extraction
After destemming, the grapes are extracted by a double screw grape crusher. It can crush the grapes into juice and separate skins and residues. The contacting parts with raw materials are made of SUS304 stainless steel. It adopts low squeezing speed to achieve high juice yield. The pressure and humidity are adjustable. Besides, it also applies to fermentative grapes and high-fiber contents.
