palm oil production line
Palm oil is edible oil extracted from the fruit of oil palm. Oil palm is one of the four major woody oil plants. The oil content of the pulp is as high as 56% to 70%. The fatty acid composition of the extracted palm oil is mainly palmitic acid and oil Acid, together with soybean oil and rapeseed oil, is known as the three major vegetable oils, with a history of more than 5,000 years of consumption. In recent years, the production and consumption of palm oil have continued to increase, which has driven many customers to plan to invest in the construction of palm oil processing plants.
However, if you want to build a factory to produce palm oil, you must first have a deep understanding of oils and fats before you can determine the direction of development. The reasons why palm oil is widely used are as follows. First, palm oil shows good oxidation stability when fried, so palm oil is often used in fried instant noodles, fried dough sticks, and French fries. Oxidation stability refers to the degree of oxidation of oil during high-temperature frying. Oxidation of oil will affect the taste, flavor, color, and nutrition of the product, and it is easy to produce substances that are harmful to the human body. After comparison, it can be found that under the same environment for long-term frying, although the color of palm oil will be deepened, the carbonyl value and polar compound content in the oil will be relatively reduced, and the strong oxidation stability is more suitable for frying.
The second is that the content of saturated fatty acids in palm oil is relatively high. Compared with edible oils such as soybean oil and rapeseed oil, the amount of trans fatty acids produced during long-term heating is also relatively low. When cooking oil is heated at high temperature and for a long time, trans fatty acids will be produced. Excessive intake of trans fatty acids can cause an increase in plasma cholesterol and low-density lipoprotein levels, which is not good for the human body. Generally, oils with high polyunsaturated fatty acid content are easy to produce reverse fatty acids. Palm oil is not easy to produce trans fatty acids, so it is widely used in deep frying.
In addition, as cooking oil, palm oil is the same as other edible oils, which can provide the human body with the necessary fatty acids and other substances. As far as the content of vitamin E is concerned, the content of palm oil is much higher than that of vegetable oil, plus palm oil In the process of continuous or repeated thermal processing, there are relatively few harmful ingredients to the human body, so it has a good advantage in the oil market.
After understanding the market positioning of palm oil, investors must fully understand the processing process of palm oil, so as to facilitate the equipment of the oil factory so as to produce edible oil that meets market demand. The palm oil factories served by Huatai grain and oil machinery and equipment manufacturers are all over the world. Various places, here is a brief introduction for you that the transformation of palm fruit into palm oil needs to go through a series of mechanized procedures, including sterilization, threshing, crushing, pressing, deacidification, decolorization, deodorization, fractionation, drying, packaging and other processes.
Sterilization is an important step in palm oil processing. The mature oil palm pulp and kernel are rich in lipase, which can degrade the fat in the fruit by itself, resulting in an increase in free fatty acids, an increase in the acid value of the oil, and a decrease in quality. Sterilization is a heat treatment process that softens, loosens, and falls off the fruit stalk, and at the same time reduces the activity of lipase to avoid the production of a large amount of free fatty acids, thereby ensuring the quality of the finished oil.
The shedding palm fruit needs to be cleaned, screened, crushed and other pretreatment processes to fully destroy the internal structure of the oil plant, so as to achieve a state that is convenient for oil extraction, and then pressed or leached. The oil content of palm fruit is high, and the oil yield of mechanical pressing method is in the range of 75% to 90%. In this process, the oil factory can use the screw press to carry out continuous processing to obtain a good oil yield.
For most oilseeds, in order to reduce the oil content in the oil cake during processing, the pressed cake will be leached. In the production of palm oil, the oil cake is usually seldom leached, because the palm fruit is squeezed to obtain palm kernels and fibers. There is very little residual oil in the cake, and there is no need to extract the pressed cake to increase the oil yield, and the palm kernel can be further processed to extract palm kernel oil, so the mechanical pressing method is basically enough to process palm oil.
The liquid obtained by pressing is a mixture of water, oil, dry matter, and fruit residues, and subsequent operations such as centrifugation and vacuum drying are required to separate other substances to obtain crude palm oil. Crude palm oil contains peptizing impurities such as phospholipids, proteins, and viscous substances, as well as free fatty acids, pigments, and other impurities. It needs to be processed by refining equipment to separate them to obtain healthy, nutritious and safe edible oil products.
The refining treatment of palm oil can be divided into physical refining and chemical refining. The main difference between the two processes is the separation method of free fatty acids. The deacidification process of physical refining is carried out simultaneously with the deodorization process. The deacidification process of chemical refining is usually It is placed after hydration degumming. The physical refining deacidification method is to use free fatty acids and odor molecules, which are highly volatile under high temperature and high pressure conditions, to separate these impurities by passing steam into the crude oil.
There are strict standards for the content of phospholipids and pigments in oils in the physical refining deacidification process. During the degumming and decolorization steps, these impurities should be separated as much as possible to avoid the reaction of peptized impurities and pigments under high temperature conditions, which will affect the quality of the finished oil. Chemical refining deacidification is to add an appropriate amount of lye to crude oil, use acid-base neutralization reaction to separate free fatty acids, and at the same time reduce the content of phospholipids in oil. Relatively speaking, the chemical refining process is more convenient to operate, but the waste water generated needs to be treated to avoid impact on the environment.
Which refining process an oil factory chooses should be decided according to the actual situation. In this process, the oil factory invests in the construction of a palm oil factory, and the application of mechanical equipment is indispensable. It is recommended that the oil factory cooperate with Huatai Grain and Oil Machinery, which has rich experience and has served thousands of oil factories. The equipment factory cooperates, the manufacturer has mature technical skills, serious and responsible staff, can provide reasonable mechanical equipment for the customer according to the actual situation, provide practical solutions for the oil factory, and assist the production of the oil factory.