Soybean oil extraction machinery is a series of complex and efficient equipment combination, mainly used for efficient extraction of oil from soybeans. These equipment include cleaning screens, crushers, softeners, etc. in the pretreatment stage, which together ensure the purity and suitability of the raw materials. The pressing stage is the core, and the oil press squeezes the oil from the soybeans through mechanical force to form virgin oil. In order to improve the quality of oil products, refining equipment such as degumming, deacidification, decolorization, deodorization and other systems are also required to remove impurities and undesirable components in the oil. The entire production line is also equipped with auxiliary equipment such as conveying, oil-water separation, evaporation, cooling and filling to ensure the smooth production process and the final quality of the oil products. The efficient operation of these equipment makes the soybean oil extraction process more automated and scaled, meeting the market demand for high-quality edible oil.
The extraction process of soybean oil is mainly divided into several different methods, among which the most common are pressing and leaching. The following is a detailed introduction to these two methods:
1. Pressing method
The pressing method is a method of extracting oil from soybeans by physical squeezing. The process flow is roughly as follows:
Pretreatment: First, the raw soybeans are cleaned to remove impurities and bad fruits. Then, the soybeans are broken into smaller particles by a crusher to increase their surface area to facilitate the outflow of oil during subsequent pressing. Next, softening, embryo rolling and other processes may be required to make the soybean particles easier to press.
Pressing: The pretreated soybeans are sent to the oil press for pressing. The oil press squeezes the oil out of the soybeans through mechanical force. Common oil presses include screw oil presses and hydraulic oil presses. During the pressing process, there are no additives, so the crude oil is of high quality, with complete color, aroma and taste, and retains various nutrients in soybeans, with high nutritional value. However, the oil yield of the pressing method is relatively low, and the requirements for equipment are relatively flexible. Different production line solutions can be configured according to the production scale, budget and site size, which is suitable for small and medium-sized edible oil processing plants.
2. Extraction method
The extraction method is a method of extracting oil from soybeans using chemical solvents. Its process flow is roughly as follows:
Pretreatment: Similar to the pressing method, the soybeans are first pretreated by cleaning and crushing, but the extraction method may also require more in-depth softening, rolling and other processes to improve the extraction efficiency.
Extraction: The pretreated soybean cake is sent to the extraction equipment, and the solvent (such as n-hexane) is fully combined with the soybean cake to extract the oil to form a mixed oil. Then, the solvent and the oil are separated by evaporation, stripping and other processes by taking advantage of the different boiling points of the solvent and the oil to obtain the extracted soybean oil. The extraction method has a higher oil yield, and because the solvent can extract the oil from the soybean cells, the oil is extracted more thoroughly. However, the crude oil may contain solvent residues, so the required refining conditions are more stringent than those of the pressed oil.
Refining: In order to improve the quality of oil, ensure the safety of oil consumption, and extend the storage time of oil, the extracted soybean oil needs to be refined. The refining process includes degumming, deacidification, dehydration, decolorization, deodorization, dewaxing and other processes to remove impurities and undesirable components in the oil and improve the purity and stability of the oil. The refined extracted soybean oil has fewer impurities, high purity, high smoke point, and is suitable for high-temperature cooking.
Summary
The pressing method and the leaching method each have their own advantages and disadvantages. The pressing method retains the nutrients in soybeans, but the oil yield is low; the leaching method has a high oil yield, but it may affect the purity and flavor of the oil. In actual production, the appropriate extraction process can be selected according to factors such as production scale, product quality requirements, and market demand. Regardless of the process used, it needs to be refined to improve the quality of the oil.
The application scope of soybean oil extraction machinery is quite wide, mainly covering the following aspects:
1. Soybean and similar oil crops
Soybean: As the most common oil-pressing crop, soybean oil extraction machinery can efficiently extract its oil. These machines can handle soybeans of different varieties and qualities to meet different production needs.
Soybean: Soybean is similar to soybean, and its oil content is also low, but soybean oil extraction machinery is also suitable for soybean oil extraction process. Before extraction, soybeans may need to be pre-treated by washing and drying.
2. Other oil crops
Soybean oil extraction machinery is not limited to soybeans and soybeans, but can also be used to extract a variety of other oil crops. For example, rapeseed, cottonseed, peanuts, linseed, palm, coconut shell, olive fruit, castor, sesame, sunflower seeds, rice bran, corn germ, walnuts, almonds, evening primrose, tea seeds, pine nuts and other oil crops can be extracted on soybean oil extraction machinery through appropriate pretreatment and adjustment.
3. Automation and versatility
Modern soybean oil extraction machinery often has automated control functions, such as automatic control of heating, oil pressing, filtering and other processes, which simplifies operation and improves production efficiency.
These machines are also multifunctional and can be adjusted and optimized according to the characteristics of different oil crops to achieve the best oil pressing effect.
4. Industrial production and small oil mills
Soybean oil extraction machinery is suitable for production environments of different scales. For large oil mills, large and efficient oil pressing equipment can be selected to meet the needs of large-scale production; and for small oil mills or family workshops, there are also small oil presses suitable for their scale.
5. By-product processing
In the process of extracting soybean oil, some by-products such as soybean meal are also produced. These by-products have high utilization value and can be used in many industries such as food, medicine, beauty, feed, etc. Therefore, soybean oil extraction machinery not only extracts oil, but also provides convenience for the processing of by-products.
In summary, the scope of application of soybean oil extraction machinery is very wide, not only limited to oil crops such as soybeans and soybeans, but also can be used in the oil pressing process of many other oil crops. At the same time, these machines also have the characteristics of automation and versatility, which can meet the needs of production environments of different scales.
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