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| Main machines of peanut oil manufacturing process |
Screening machine, de-stone machine and magnetic separator are the common cleaning machine for pre-treatment of peanut in oil extraction plant. They are adopted to remove certain impurities such as sand, stone, and metal, so that to improve the oil yield and production efficiency, and reduce wear rate of accessories. The immature, mildewed and broken peanuts should also be separated by the grading screen, which can be used to produce second grade peanut oil or be sold separately.
Husking
Husking machine is needed to remove the shells.
Crushing
Groundnut can be pressed as whole seeds in peanut oil making machine. But after crushing and flaking by use of roll crusher and flaking machine, the oil yield can be significantly increased. During the crushing process, the red skin of peanuts can be separated by wind selector, and to be used as raw material for medicine and chemical industry.
Flaking
The flaking machine is ued to flake the fruits, so as to make the peanuts reach the beast state before being pressed.
Cooking / Steaming
Roasting temperature is the key factor to produce peanut oil with fragrance. Too low, the fragrance will be weak, too high, it is easy to burn. In most situation, 180℃~200℃ is suitable. In order to prevent over cooked, the seeds should be cooled immediately, and then be crushed in toothed roller crusher.
Oil Pressing Process
Screw type peanut oil making machine is used in this process. Pressing temperature: 135℃; Moisture content 1.5%~2%. The residual oil rate can be reduced to 2% with twice pressing process. The crude peanut oil will be filtered by plate and frame filter, and then be sent to the refining machine. The oilcakes can be further processed in solvent extraction workshop to extract the residue oil, or be sold to feed mill plant. (Read more about defatted peanut flour production.
Peanut Oil Refinery
In some cases, the expeller pressed oil is required to be refined to produce high quality edible oil.
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| Oil refining machine |
If you want to make peanut oil, welcome to contact us!
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