Pre - treatment of oilseeds before pressing is a crucial step that determines the efficiency of the screw oil press and the quality of the extracted oil. This article delves deep into the entire pre - treatment process, from raw material cleaning, crushing, steaming and frying to conditioning, providing a comprehensive understanding of the key points in each stage.
Cleaning the raw materials is the first step in the pre - treatment process. Different oilseeds have different cleaning requirements. For example, rapeseeds often contain impurities such as dust, stones, and stems. By using advanced cleaning technologies, we can effectively remove these impurities. A factory in Shandong Province improved the cleaning process of rapeseeds, which increased the purity of the raw materials by 95%. As a result, the ZY24 (202 - 3) screw oil press reduced equipment wear by 15% and increased the oil yield by 2%.
Crushing the oilseeds can increase the contact area between the oil cells and the pressing mechanism, which is beneficial for oil extraction. For peanuts, appropriate crushing can ensure that the oil can be released smoothly during the pressing process. However, over - crushing may lead to problems such as oil oxidation. In a case in Henan Province, through scientific crushing of peanuts, the oil yield of the ZY24 (202 - 3) screw oil press increased by 3% compared with the previous process.
Steaming and frying are important steps to adjust the moisture and temperature of the oilseeds. Different oilseeds have different optimal steaming and frying temperatures. For peanuts, the temperature needs to be strictly controlled. If the temperature is too high, the oil quality will be affected; if the temperature is too low, the oil yield will be reduced. A peanut oil factory in Guangdong Province adjusted the steaming and frying temperature according to the characteristics of peanuts, and the oil yield increased by 4%. The following is a comparison table of the steaming and frying temperatures of common oilseeds:
| Oilseeds | Steaming and Frying Temperature (°C) |
|---|---|
| Peanuts | 110 - 120 |
| Rapeseeds | 100 - 110 |
| Cottonseeds | 90 - 100 |
Conditioning is the final step in the pre - treatment process. By adjusting the moisture and temperature of the oilseeds, we can make the oilseeds reach the best state for pressing. For different oilseeds, we need to set different conditioning parameters. Through scientific conditioning, a soybean oil factory in Heilongjiang Province increased the oil yield of the ZY24 (202 - 3) screw oil press by 3.5%.
Let's compare two cases. Factory A did not pay attention to the pre - treatment process, and the oil yield of the screw oil press was only 30%. Factory B strictly followed the pre - treatment process, including scientific cleaning, crushing, steaming and frying, and conditioning. As a result, the oil yield reached 35%. This shows that a good pre - treatment process can significantly improve the oil yield and the efficiency of the ZY24 (202 - 3) screw oil press.
Proper equipment maintenance and operation specifications are essential for the long - term efficient operation of the ZY24 (202 - 3) screw oil press. Regularly checking the equipment, cleaning the filters, and lubricating the moving parts can effectively extend the service life of the equipment. By following the operation specifications, we can also reduce the occurrence of failures and ensure the stability of the oil yield.
To help you better master the pre - treatment process of the screw oil press, we provide a downloadable PDF document, "Pre - treatment Operation Checklist". This checklist can help you standardize your operations and improve work efficiency. You can download it by clicking here.
Do you have any questions about the pre - treatment of oilseeds for the screw oil press? Or which oilseeds do you think are the most difficult to pre - treat? Share your thoughts in the comments section below!
