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Oil refining is commonly known as "refining", that is, the use of physical and chemical methods to remove solid impurities, free fatty acids, phospholipids, colloids, waxes, pigments, odors and so on.
Oil refining process can be divided into chemical refining and physical refining. They are used to remove phospholipids, free fatty acids, pigments and other impurities in plant crude oil.
New technology of environmental protection and energy saving:
After years of practice and combined with the imported advanced technology, our company has developed a set of technology combined with pre-decolorization and anhydrous degumming, which is suitable for the refining of a variety of Chinese oils and oils. It can provide users with the best vegetable oil refining technology and equipment, and ensure the best quality of refined oil at low cost.
In practical use:
1) more than 40% of decolorized clay can be saved and the loss of neutral oil can be reduced by about 60%.
2) there is no waste water in production, and users do not need to invest in wastewater treatment equipment, which greatly reduces the investment cost.
Physical Refinery Tech
The colloid in oil is removed by special process in physical refining, and the free fatty acid contained in it is removed by steam in deodorizing section.
The utility model has the following characteristics:
1. the oil refining rate is high and the loss is small;
2. the production wastewater is less;
3. the quantity of fatty acid distillate is increased;
4. it is more suitable for the oil products with high acid value and low glue content.
Chemical refining Tech
This is an oil refining process in which free fatty acids from oil are removed by chemical method (acid-base neutralization). The resulting colloid and soap foot are separated by centrifuge.
Chemical refining has the following characteristics:
1, strong adaptability, the requirement for raw material crude oil is not high;
2, the product oil quality stability is good;
3, the frame structure, the installation is fast;
4, the investment is small, the income is fast.
The basic process of Oil Refining
Semi-continuous refining equipment
Suitable for small and medium-sized oil enterprises to carry out various types of animal and vegetable edible oil refining process.
Through the combination of intermittent process and continuous process, the process of oil replacement is produced.
The degumming process adopts intermittent, decolorizing process, deacidizing process, deodorization process is continuous, and the wintering process can be produced intermittent or continuous according to the output of the enterprise. At the same time, decolorization process, deacidizing process, deodorization process and wintering process can be controlled automatically. the equipment configuration unit of the system is simple, the cost is low, and the rate of return on capital is high.
Main equipment: degumming pot, drying pot / tower, decolorizing pot / tower, stripping deacidizing tower, as well as decolorizing filter, heat exchanger, control system, vacuum system, heat conduction oil furnace, etc.
Continuse Refinery Process
It is suitable for continuous production of vegetable edible oil refining in oil and fat enterprises. The process of degumming, decolorization, deacification and deodorization is continuous, and the wintering process can be intermittent or continuous according to the output of the enterprise. At the same time, decolorization process, deacidizing process, deodorization process and wintering process can be automatically controlled and operated automatically to avoid excessive artificial operation affecting the quality of oil and fat.
Main equipment:
degumming mixer, centrifuge, drying tower, decolorizing tower, stripping deacidizing tower, as well as decolorizing filter, heat exchanger, control system, vacuum system, heat conduction oil furnace, etc.
The process of removing phospholipid and protein and other impurities in crude oil at a certain temperature in the degumming section , so as to prevent the foaming, smoke, discoloration and blackening of the oil at high temperature.
2.Alkali refining deacidizing (chemical method) :
The process of removing soap feet by neutralizing free fatty acids in crude oil with alkali
3.Bleaching process
The process of removing pigment by adding a certain amount of activated clay and activated carbon to the crude oil.
4.Stripping deodorization, deacification (physical mode)
In vacuum condition, steam is taken away from free fatty acids and other odorous substances through oil and fat.
5.Dewaxing process
the process of removing wax from oil is called dewaxing. The oil with high wax content eats and affects appetite. After entering the human body, it can not be digested and absorbed for the human body, so it is necessary to remove it.
6. Winter / fraction: after the above five deletions, some plant crude oils still contain some solid lipids, which can not meet the quality standards of salad oil.
wintering :In order to get a high grade of vegetable oil, these solid lipids must also be removed. This process of removing solid fat from oil is called "de-fat" of oil and fat, and the method is "wintering". Use palm oil, peanut oil or cottonseed oil to produce salad oil.
Fractionation : it is based on the theory that the melting point of .jpg is different for different molecular components of glycerides.
Through this processing, the oil is cooled and crystallization by grade, the solid and liquid are separated, and the required products are obtained.
The solubility of solid fat in liquid oil increases with the increase of temperature. When the temperature decreases to a certain point, the solid fat begins to precipitate in grain, and the temperature is called saturation temperature. The higher the concentration of solid fat, the higher the saturation temperature.
There are many methods to choose from winter extraction. The conventional method is commonly used in China: it refers to the cooling crystallization and crystallization of oil, the process of liquid separation, and the separation process of oil without other measures to promote the separation. The conventional method is divided into two methods: intermittent process and semi-continuous process. The process and equipment of conventional dewaxing can be applied in intermittent process, but the conditions of process parameters are changed according to the requirements of raw materials and finished products. Semi-continuous oil extraction, with batch crystallization and continuous filtration composition.
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