The operating process of Palm oil refining machine usually includes dewaxing, easting and fractionation. The subsequent fat fractionation is a process in which a relatively high melting point component is crystallized and separated and separately purified based on the difference in melting point between the triglycerides. In addition, dewaxing and easternization in the process are special cases in the classification.
What is oil: It is obtained by pressing, leaching, etc., and the unrefined animal and vegetable oil is called hair oil. Its main component is a mixture of various triglycerides, commonly known as neutral oils.
Impurities contained in wool: After chemical and physical refining, the oil is reduced to a certain standard to obtain a qualified fat product. The main impurities contained in the wool are as follows:
Suspended impurities: solid impurities such as sediment and cake residue
Peptizing impurities: mainly phospholipids
Oil-soluble impurities: mainly free fatty acids (FFA), pigments, etc.
Moisture
Why carry out oil refining:
The presence of suspended impurities, peptized impurities and moisture will be beneficial to the activity of the microorganisms, causing the oil to hydrolyze rancidity.
The presence of phospholipids will make the appearance of the oil turbid and dull. A lot of foam is produced when cooking.
If the FFA contained in the oil is too high, the oil will have a strong odor and a poor flavor. Some FFAs will smoke when cooking.
Poor pigmentation causes the oil to darken and even darken. Therefore, in order to get the products accepted by consumers, it is necessary to refine the oil.
Palm oil refining machine dewaxing is the removal of high melting wax from liquid oil. The wax fat in vegetable oil is contained in the seed coat, shell and germ of vegetable oil. Different vegetable oils and different processing methods have different wax fat contents. It has a low solubility in oils and fats, and has a high melting point (78-82 degrees), which cannot be absorbed by the body and is difficult to be formed. The content of wax in oil and fat is about 5% except rice bran oil, and the content of other vegetable oils is very small. Therefore, in daily production, the dewaxing of rice bran oil needs to be treated separately, and other vegetable oils are generally removed by the winter dewaxing process.
The main purpose is to produce high-quality edible oil fractionation. In essence, it is divided into two parts: crystallization and solid-liquid separation. The crystallization process of fats and oils is generally divided into three stages.
Even if the grease or the temperature is quickly cooled to form a supersaturated state, the high melting point is sufficiently separated to start to separate;
Slow cooling and slow agitation (135/min) promote the formation of crystal nuclei;
Each grease has its own specific freeze crystallization curve. Most of the domestic methods are still used for dry separation. Therefore, the separation method is mainly based on pressure filtration. The wax components contained in different vegetable oils are also different. The linear waxes contained in various vegetable oils and fats are linear. Different alcohol content
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