Rapeseed is one of the important oil crops, mainly used for processing into oil for human consumption. The oil content in rapeseed is about 35%~46%, and the oil content varies slightly according to different rapeseed varieties. The commonly used processes for industrial rapeseed oil processing are pressing and extraction.
As a traditional edible oil processing process, the pressing process is well known to everyone. In the early days, it relied on manual pressing. With the development of science and technology, it has now moved towards mechanical automation and is widely used in small and medium-sized edible oil processing plants. The pressing process relies on physical pressing to extract oil. There is no other additive in the production. The oil retains its original flavor characteristics, which is also popular with consumers. However, the disadvantage of the pressing process is that it cannot fully extract the oil from the oilseed. There will be about 5% to 8% residual oil in the cake. For large edible oil mills, it will cause a waste of oil resources and affect the quality of the cake. Therefore, large and medium-sized rapeseed oil mill projects usually choose the pre-pressing-extraction oil production process. The rapeseed oil extraction production process is generally rapeseed pre-pressing-extraction-refining process. The specific operation steps include:
Rapeseed→cleaning→softening→flaking→steaming→pre-pressing→extraction→crude oil→refining
The pre-pressing extraction process combines the two oil production processes of pressing and extraction, which is very suitable for oilseeds with high oil content such as rapeseed and peanuts. After pretreatment, the rapeseed raw material enters the rapeseed oil press to obtain crude oil and pre-pressed cake, and then the pre-pressed cake is processed and sent to the rapeseed oil extraction equipment to extract the residual oil in the cake. The rapeseed oil extraction process is to extract the oil by solvent dissolution, and then recover the solvent through evaporation, stripping, condensation and other processes to obtain extracted rapeseed oil. It needs to be refined by rapeseed oil refinery plant to remove impurities and harmful substances in the oil. It can only be eaten after it meets the edible oil standard.
The advantages of the extraction process are high oil yield, high output, large processing volume, high efficiency, and many equipment used in the rapeseed oil production line, the degree of automation is high, so the initial equipment investment is also high, which is more common in oil mills that process more than 30TPD. The pre-pressing process can obtain high-quality pressed crude oil, and the extraction process can fully extract oil. The residual oil in the cake can be controlled within 1%, which greatly improves the oil yield.
Henan Huatai Cereals and Oils Machinery Co., Ltd. has been engaged in oil equipment processing for many years and has provided equipment and technical services to many edible oil mills all over the world. It can customize cooking oil production lines according to customers' needs. Whether it is an oil press or an edible oil mill, it can tailor production line solutions according to needs and provide suitable equipment and processing technology. There are many cases of manufacturers cooperating with cooking oil mills. Interested customers can visit the oil projects cases and are also welcome to visit our factory.
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