For culinary use, peanut oil's distinctive flavor makes it ideal for stir-frying and stuffing. Its high smoke point means it is stable during high-temperature cooking, preserving the flavor of food without producing harmful substances. But peanut oil produced in small workshops may pose safety risks. For example, if the raw peanuts are moldy, they may contain the carcinogen aflatoxin. Therefore, adopting efficient and scientific processing equipment becomes the key to improve the quality of peanut oil.

The working principle of peanut oil processing equipment is centered around six core links: cleaning, crushing, embryo rolling, steaming, pressing and refining. 

The whole process begins with the pretreatment of raw materials, and through a series of precision machinery operations, peanuts are eventually transformed into clear, bright, aromatic edible oil.

What are the key stages of peanut oil processing line?

Cleaning Stage:

Raw peanuts are first screened and de-dusted to remove soil, stones and undesirable peanuts to ensure purity for subsequent processing. This step utilizes a variety of technical means, such as wind selection and magnetic selection, to lay a solid foundation for high-quality peanut oil production.

Crushing and rolling:

After preliminary cleaning, the peanuts are fed into a crusher, which breaks them into small particles or fragments to facilitate the subsequent extraction of oil. Subsequently, these fragments are pressed into thin slices by the embryo rolling machine to increase the contact area between the oil and solvent and improve the oil yield.

Steaming and Frying:

This is a crucial step. By heating the peanut flakes moderately, it not only destroys the cellular structure of the oil material, making it easier to release the oil, but also gives the peanut oil its unique aroma through the Meladic reaction. Precise control of temperature and time is the key to this process.

Pressing and Extraction:

The steamed and fried peanut slices are fed into a hydraulic or screw press, where the oil is squeezed out of the solids by physical pressure. This process preserves the natural flavor of peanut oil and avoids the risk of chemical solvent residue.

Refining:

The peanut oil obtained from the virgin press is also subjected to refining, including degumming, deacidification, decolorization, deodorization and other steps, in order to remove impurities, free fatty acids and off-flavors from the oil, ensure the purity and stability of the oil, and prolong its shelf life.

Finished product packaging:

Finally, the strictly tested and qualified peanut oil is filled, sealed, labeled, and ready to enter the market, adding health and deliciousness to the tables of thousands of households.