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Our vegetable oil and fat refining line is used to refine various oils, including soybean oil, rapeseed oil, cottonseed oil, peanut oil, sunflower seed oil, maize germ oil, and rice bran oil. This production line features a capacity of 30-1,000 tons of crude oil per day, and is able to eliminate plasticizer (DEHP) pollution and prevent the formation of trans fatty acids (TFA) in an efficient manner. According to different kind of crude oils,we will use different refining process. Chemical refining technology and physical refining technology are two kinds of refining process.
Process Workflow
One: Refining Workshop
Degumming and Neutralization → Bleaching→ Deodorization → Dewaxing
Two: Phospholipid Workshop
Crude Oil Filtration → Degumming → Phospholipid Concentration and Drying
Three: Automatic Control System
(1) Degumming and Neutralization
Devices
mixer, reactor, heat exchanger, acid and alkali dosing device, separator, vacuum dryer, vacuum system
Features
For specific kind and grade of crude oil , the degumming and neutralization process can be flexibly adjusted to improve product yield. Physical refining process is suitable for refining of high acid value oil. Efficient system of heat exchanging can reduce the consumption of steam significantly. Devices used in the process are all well sealed, which efficiently prevents air from entering and further avoids oil oxidation.
(2) Bleaching
Devices
Bleaching earth feeder,Pre-mixer ,Bleaching tank,filter,Bleaching vacuum system
Features
The oil from neutralization section is mixed with bleaching earth for removal of pigments. The bleaching earth is transported in pneumatic mode, thus efficiently alleviate environment pollution caused by dust. The precise feeding system is used to quantify the bleaching earth, which contributes to accurate measurement and easy operation.
Mechanical agitation is carried out in the bleaching tower to ensure complete contact between the bleaching earth and the oil. As a result, stable and reliable performance and great bleaching effect can be achieved. Then, the bleaching earth is filtered out in vertical pressure leaf filters. It`s worth mentioning that there are two leaf filters, which work alternatively to improve service life. The bleached oil will go through a security filter for precision filtration. In this way, qualified bleached oil will be obtained.
(3) Deodorization
Devices
deodorization tower, fatty acid collecting system, vacuum system, heat exchanger, cooler, canned motor pump and auxiliary devices including high pressure steam boiler (thermal oil furnace) and circulating water system
Features
Every vegetable oil has its own distinct natural odour. In addition, extra unpleasant odour is imparted to the oil during degumming and bleaching processes. Hence, it is essential to remove the odour from the bleached oil.
In the deodorization section, deodorization tower used is made up with filling plates and column trays to accommodate deodorization of various oils, especially physical refining process. During deodorization, steam jet vacuum pump is sharply cooled by circulating cool water, thus creating a high vacuum status, which helps to carry away odoriferous matter to the barometric condenser and reduces steam consumption and waste water emission. As a result, production environment will be improved and less installation space will be required. Furthermore, based on quality of crude oil, technological parameters of the process can be flexibly adjusted to prevent formation of trans-fatty acids.
(4) Dewaxing
Devices
crystallizer, maturing tank, heat exchanger, cooler, horizontal filter, filter press, conveyor and feeding device for filter aid and auxiliary devices including refrigerant unit, refrigerant circulating system, compressed air system and circulating water system
Features
Oils like sunflower oil or Corn Germ oil have waxes present in them. At low temperature, these waxes gives hazy appearance to oil, which is not liked by consumers. It is therefore essential to remove these waxes prior to bottling and marketing of oil.
In our dewaxing process, continuous crystallization and crystal growth help to improve dewaxing efficiency significantly, thus reducing energy consumption and production cost. The oil after dewaxing have high quality and can passes national standards and even some strict standards.
