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How does peanut oil refining equipment remove impurities in peanut oil?

September 18, 2021

In the processing of peanut oil, removing impurities in peanut oil is a critical step. Only by removing the impurities in peanut oil can the quality of peanut oil be ensured and the needs of consumers can be met. Unrefined peanut oil generally includes a series of impurities such as peptizing impurities, free fatty acids, pigments, and odor substances. These impurities can be removed cleanly through the treatment of peanut oil refining equipment. So how does the peanut oil refining equipment remove these impurities? Next, Henan Zhongxing will give you a detailed introduction.

 peanut oil

Peanut oil refining equipment removes impurities in peanut oil through four stages of degumming, deacidification, decolorization and deodorization.

Degumming can remove peptic impurities in peanut oil. These peptic impurities not only affect the stability of the grease, but also affect the processing effect of the subsequent refining process. We often use hydration degumming to remove these impurities. The specific operation process is: add hot water to the peanut oil at the specified temperature and stir at the same time. Peptic impurities will melt and agglomerate into agglomerates, which are separated after sedimentation, thereby removing the peptic impurities.

The purpose of deacidification is to remove free fatty acids in peanut oil. Free fatty acids can easily cause the rancidity of peanut oil, making it difficult to store peanut oil. There are two ways to remove these free fatty acids: chemical deacidification and physical deacidification. Chemical deacidification is to add lye to peanut oil to neutralize it with free fatty acids to remove free fatty acids. Physical deacidification uses high-temperature water vapor to take away free fatty acids in peanut oil. Henan Zhongxing can recommend suitable deacidification methods based on factors such as the acid value of peanut oil and the amount of refining treatment.

Deacidification equipment

Decolorization is the use of white clay adsorption to remove the pigment in peanut oil, while also taking away some other impurities. In the decolorization process, in addition to the decolorization equipment, a leaf filter is also needed to filter out the waste white soil to ensure the quality of peanut oil. 

Deodorization, as the name suggests, is to remove the odorous substances in peanut oil. The smelly substances in peanut oil have a great influence on the quality and taste of peanut oil and need to be removed. Henan Zhongxing mainly uses the difference between the volatility of peanut oil and odorous substances to remove odorous substances. The specific operation process is: under the condition of high temperature and high vacuum, water vapor is introduced into the deodorizing equipment to take away the odorous substances.

After the deodorization is completed, various impurities in the peanut oil are removed, but the beneficial substances in the peanut oil still exist, which meets the national standards for use. If you want to remove impurities in peanut oil, so as to obtain high-quality peanut oil and sell it on the market, then peanut oil refining equipment is indispensable. Henan Zhongxing has been producing peanut oil refining equipment for more than ten years, and also provides edible oil refining equipment to customers all over the world. Welcome to contact us and look forward to cooperating with you.