Peanuts-Nanyang Qifeng Machinery Co., Ltd.

Oil Seed Characteristics

Peanuts generally contain 30-35% shell, peanut kernels contain 40-50% oil, peanut oil is extracted from peanut kernels. Because the oil content of peanut kernel is high and it is soft oil, the double press or pre-pressing and solvent extraction method is often used to extract peanut oil.

Production Process

Shelling - Clean
Shelling is the use of shelling machine to remove the shell of peanuts, peanut shelling requires that there is no shell in the kernel (or shell content is less than 2-4%), and the kernel content in the shell is less than 0.5%. Cleaning is removing impurities from peanuts.
If the raw material of peanut oil extraction is peanuts with shells, then it is necessary to peel the shells and clean up. If the raw material is peanut kernels, then it only needs to be cleaned before moving on to the next step.
Crush
Crushing is the use of a crusher to reduce the particles of peanut kernels and increase the surface area of peanut kernels, so that the speed and output of oil will increase.
Flaking
The function of the rolling embryo is to press the peanut grains into thin sheets and destroy the cell tissue of the peanut, so that the peanut oil is more easily escaped from the peanut. It should be noted that the thickness of the peanut embryo should be less than 0.5 mm, and the roller must be prevented from sticking in the rolling embryo.
Frying
Adjust the temperature, humidity and internal structure of peanuts by steaming and stir-frying, so that peanuts can reach a good state before pre-pressing, which can improve the pre-pressing effect. Steaming is generally adjusted according to the pressing conditions of hot pressing (1-2% moisture, temperature about 130℃).
Prepress
The oil content of peanut kernel has reached 40-50%, it is recommended to use the double pressing method to press peanut oil, so the extraction rate of peanut oil will be high.
Press
The remaining oil in peanut cake can be extracted by pressing. The commonly used oil press is the screw oil press, and the cake press can be considered when necessary to increase the pressure of the screw peanut oil press chamber.
Refine
Peanut oil still needs to be refined. Peanut oil refining process includes degumming, deacidification, decolorization and deodorization four sections, each section can remove the corresponding impurities. The refined peanut oil meets the national standard and can be sold in the market.