Soybean oil machine
Soybean oil machines generally use pressing method and leaching method. It also includes peeling and leaching oil making method, low temperature meal method, negative pressure evaporation leaching oil making method. No matter which method is used, the obtained soybean crude oil has more impurities and must be refined. An edible refined oil is obtained.
The pressing method of soybean oil machine is divided into two kinds: ordinary pressing method and screw pressing method. Ordinary pressing is a method in which pressure is applied to soybeans. This method is not used much now, especially in industrialized mass production. The screw press method is to install a screw shaft in the cylinder of the horizontal device. After the pretreated soybeans enter the screw press machine, the oil is squeezed out while advancing. This method can be used for continuous production, but during the oil extraction process, due to friction and heat, the protein of the pressed cake often changes to a large extent.
The leaching method of the soybean oil machine is to use the solvent that can dissolve the oil, spray and penetrate, and use the effects of molecular diffusion and convective diffusion to extract the oil in the blank. Then, the mixed oil composed of solvent and soybean oil is separated, and the solvent is recovered to obtain crude oil. The crude oil is sent to the refinery for further processing. Negative pressure evaporative leaching is a method of separating mixed oil by using the secondary steam in the evaporator as the energy source of the first evaporator.
The leaching solvents commonly used in the actual production of my country's oil industry include hexane or light gasoline and other aliphatic hydrocarbons. Among them, n-hexane is a solvent that is widely used, but its biggest disadvantage is that it is flammable and explosive, has complex components, and has a wide boiling point range. The oil extraction rate of the leaching method is as high as 99%
The difference between soybean oil machine pressed oil and extraction oil
1. The processing technology is different
The processing technology of pressing oil of soybean oil machine is "physical pressing method", and the processing technology of extracting oil of soybean oil machine is "chemical leaching method". The production process of the physical pressing method requires that the raw materials be carefully selected. After the oil is removed from impurities and stones, it is crushed, steamed, fried, and extruded to separate the oil from the oil. During the pressing process, fried seeds are added. , Made of high-tech natural filtration purification technology. It maintains the original flavor of soybeans, has a mellow fragrance, is rich in vitamin E, has a long shelf life, and does not contain any additives, solvent residues and soap content. It is a pure natural green food produced by a combination of modern technology and traditional technology. .
The leaching method of soybean oil machine adopts the organic solvent extraction method, and the oil is extracted by fully combining the oil with "No. 6 light gasoline" (commonly known as n-hexane) and other organic solvents. It needs to be cleared, and it can only be eaten with confidence after refining to a very strict standard, otherwise, it will easily cause harm to the human body;
2. Different nutrients
The soybean oil pressed by the soybean oil machine has a complete color, aroma and taste, and retains the characteristics of various nutrients. The oil extracted from the soybean oil machine is colorless and tasteless, and most of the nutrients are destroyed after processing. The edible oil standard drafted by the Food Bureau has been promulgated and implemented. The old standards formulated in 1986 and 1988 currently used in China have been cancelled. The new standard stipulates that pressed soybean oil and extracted soybean oil should be marked with "pressed" on the product label respectively. , "leaching" words. With the progress of society and the improvement of people's living standards, people's pursuit of nutrition and health has become the pursuit of diet. The transparent production process of soybean oil is to let consumers understand the production process of soybean oil and give consumers the right to know. Give consumers the choice.
Zhengzhou Dayang Oil Chemical Equipment Co., Ltd.
Consult soybean oil machine technical issues
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