Edible or vegetable oil efining process can remove phospholipids, FFA, pigment, off-flavor and other impurities. Edible oil refining includes the following sections: Degumming, De-acidifying, Bleaching, Deodorizing and Dewaxing. We supply quality and professional edible / vegetable oil refining equipment and technology to ensure that best finished oil is achieved with the lowest production cost.
Oil Refining Plant
Oil refining plant refers to a series of refining processes that can remove phospholipids, FFA, pigment, off-flavor and other impurities in the oil。The entire oil refining plant process comprises Degumming / Neutralization, Bleaching, Deoderization, and Winterization. According to different edible oil refining technologies, we generally classify it into Physical Refining & Chemical Refining.
Edible Oil Refining / Vegetable Oil Refining
Edible Oil Refining - Physical Refining
Physical refining means removing gum in oil during process of degumming in special method and removing FFA in process of deodorizing by steam.
Features of Physical Refining
• Less oil loss and higher edible / vegetable oil refining ratio.
• No waste water in the edible oil refing process of production.
• More FFA is distilled out.
• More suitable for oil with high acid value and low gum impurity.
Edible Oil Refining - Chemical Refining
Chemical refining, however, usually means removing FFA in a chemical way ( Acid-base neutralization). Gum and soap foot produced is separated by centrifuges. It is one popular refining method of edible / vegetable oil refining.
Chemical Refining usually includes the following sections:Hydration Degumming, Special Degumming, Versatile Neutralization Washing, Bleaching (Decolorization), Combined Deodorization and Dewaxing.
Hydration Degumming
Hydration degumming mean adding into some hot water and controlling the corresponding conditions to make the hydrosol agglomerated, deposited and then separate them. The separated gum(after being dried) can be made into lecithin or added into cakes or meals in the extraction workshop. Hydration degumming process can improve oil edibility, storage and do good to downstream neutralization section.
Special Degumming
The technology is specially developed to meet the demands of physical refining for edible / vegetable oil refining. Add small quantity to acid or dilute base to the vegetable oil, strictly control the corresponding conditions to separate out the hydrated gum and un-hydrated gum. Gum level in oil should be controlled to suitable for downstream processing.
Versatile Neutralization Washing
Since there are many kinds of oilseeds and the oilseeds quality is different from each other, we combine the merits of many technologies and develop the versatile neutralization washing technology. The technology can be used to process oil of various kinds, quality and requirements. Add into alkali, water and acid to remove FFA, crude phospholipids and moisture. As a result, (degummed and neutralized) oil and by-products such as soap foot, crude phospholipids and water are obtained.
Bleaching (Decolorization)
High activity clay is added into oil. Mix and heat mixture of oil and clay to make the small particle of pigment absorbed on the crystal of clay. At last filter the oil. Perfect mechanism, liable performance, well configured equipment-Bleaching Tower and Filters ensures excellent bleaching and separation effect.
Combined Deodorization
Combined deodorizing is the latest technology, which improves oil flexibility significantly. Detailed deodorizing process in the entire oil refining plant is: Most heat of bleached oil is recovered by Heat Exchangers. The bleached oil is heated to the process temperature by mineral oil or high pressure steam and then the oil enters into the Combined Deodorizer. The Deodorizer is a combined type: The upper is packing structure, which is used to remove odor components like FFA; the lower is a plate type used for heat bleaching and making product quality more consistent. Oil coming from the Deodorizer is cooled and stored after series of heat exchanger. Volatile like FFA is collected and stored as by-products.
Dewaxing
Dewaxing can improve oil quality, so it plays in important role to the finished edible / vegetable oil quality. At the same time, dewaxing can improve oil transparency and brightness. It is necessary to dewax for some oilseeds such maize oil, rice bran oil, sunflower oil and cotton seed oil. At present, winterizing method is very popular to dewaxing. The crystallizing rate, crystallization temperature, maturing time vary with oil features.
Features of Chemical Refining
Excellent adaptability and less requirement to oil quality.
• The finished oil is consistent and stable.
• Less bleaching earth is added into compared with physical refining.
KMEC is the leading company in oil refining plant, we specialized in edible oil refining as well as vegetable oil refining. We design and istalling complete oil refining plant, we offer quality edible / vegetable oil refining machines. The customers who have experience cooperating with us are very satisfied with our machines and plants, and they all expect a next cooperation.
If you prefer to know more info about our oil refining plant or edible oil refining and vegetable oil refining, please don't hesitate to let us know and we will respond to you question as soon as we get your email.
