Soybean oil processing requires a series automatic process. Normally, the basic process of mini soybean oil processing plant is cleaning, cooking, oil pressing, oil filtration or oil refining, etc.. Every process has the respective soybean oil processing equipment to fulfill its functions. The main equipment for a mini soya oil extraction plant is cleaning equipment, cooking machine, soybean oil press, soybean oil filter machine, conveyors, and more. As the core heart of mini soybean oil mill plant, Soybean Oil Extraction Machine makes uses of mechanical forces to squeeze oil out from the soybean materials, which can totally ensure no chemical solvent additions while get the highest oil yield.
The first step is cleaning the soy seeds. Then, dry the seeds and dehull prior to oil extraction. You have to remove the soybean hulls because they absorb oil and give a lower yield. However, you can dehull by cracking the soybeans. Finally, separate the hulls and cracked soybeans mechanically. Additionally, you can use magnets to separate any iron particle from the soybeans.
The soybeans are also heated to about 75°C to coagulate the soy proteins to make the oil extraction easier. For extracting the oil cut the soybeans in flakes. Put them in a percolation extractors and immerse with a solvent, normally hexane.
Counterflow is used as extraction system because it gives the highest yield. After removing the hexane, the extracted flakes only contain about 1% of soybean oil and is used as livestock meal or to produce food products such as soy protein. Finally, separate the hexane from the soybean oil in evaporators. And recover the evaporated hexane and return to the extraction process. Now, the hexane free crude soybean oil is ready to go to the refineries.
If you are looking for small scale soybean processing plant for your own uses or business purposes. Our mini soybean oil mill can perfectly meet all your expectations about soybean oil manufacturing. It just connects necessary soybean oil processing machine together by conveyors to form continuous and automatic soybean oil production. The common capacity of our mini soybean oil mill is about 1~30 tons per day. Estimates of the total cost range from $ 7,000 to as high as $100,000. For people who is going to start a mini or small soybean oil making business. It is absolutely the BEST choice