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Canola oil is a completely natural product.
A mechanical oil press is usually used to extract the oil to ensure that the quality of the oil is preserved. The oil content of rapeseed is about 40%, and the shenzhou rapeseed oil production line has four main parts: a pre-pressing/pressing/pretreatment process, solvent extraction process, refining process, and dewaxing/winterizing process.
Oil Machinery provides and customizes a complete set of 20-5000TPD rapeseed oil production lines.
Rapeseed Oil Pretreatment Process
The main function of cleaning is to remove mechanical impurities in rapeseed. Canola oil pretreatment machine adopts a rapeseed selector, gravity destoner, and magnetic separator to remove the clay, stone, metal, and other impurities in the rapeseeds.
Softening is to adjust the temperature and moisture of rapeseed with steam. Adopt a rotary or flat-bottom roaster for rapeseed roasting to achieve the desired temperature and humidity.
Flaking presses oil seeds from granulous to laminar, which benefits oil pressing and oil extraction, and also makes oil flow out smoothly when pressing or solvent extraction.
Cooking is to wet, heat, steam, and cook flakes to change the internal structure of flakes, which makes it much easier to press oil out from oil seeds.
Rapeseed Oil Production Line Process Flow
With the aid of a feeder, the roasted canola seeds enter the rapeseed oil press machine. The worm rotates along with the main shaft to push the materials forward. The pressure within the chamber increases gradually with the reduction of the volume of the pressing chamber. The canola oil press machine is equipped with an automatic barrel heating system. Meanwhile, the friction force produces heat. The cells of the materials are destroyed and the oil flows out. When the oil flows onto the filtering barrel, by the vacuum pump, the oil is pumped into the barrel and the residues are left on the filter cloth, thus the pure canola oil is obtained. We get crude canola oil and canola oil cake meal in this production process.
The cold pressing process of rapeseed oil is the simplest and most traditional method to extract rapeseed oil,which omits the heating and chemical leaching process of the oilseed and preserves the nutrients of rapeseed oil to the greatest extent. The cold pressing process has the characteristics of pure natural, high-quality oil, generally does not need to add additives, and can be preserved for a long time. The market value is high,but the oil yield is relatively low compared with the hot pressing process.
Because of the high oil content of rapeseed, the pressed rapeseed cake meal still has a high oil content, and the rapeseed oil solvent extraction device can extract rapeseed oil from the oilseed to the maximum extent.
The solvent extraction process has four processes. They are solvent systems, desolvent systems, condensing systems, and recovery systems. After the Extraction process, we can get wet rapeseed oil powder and crude rapeseed oil. Wet rapeseed meal can be sold as animal feed. The crude oil of rapeseed contains solid impurities, chemical impurities, and odors, so we can refine the crude oil.
The rapeseed oil refinery plant is very important equipment in the rapeseed oil production line, it refers to removing the harmful impurities from the crude rapeseed oil. After rapeseed oil refinery plant is thinner without FFA, colorless and odorless, and also, it is good for human health and easy to store.
Requirements for extraction cake ,steam ,water. electricity etc.
| Moisture of extraction material |
5-8% |
| temperature of extraction material |
50-55°C |
| oil content of extraction material |
14-18% |
| thickness of extraction cake |
less than 13mm |
| powder porosity of extraction material |
less than 15% (30 mesh) |
| steam |
more than 0.6Mpa |
| solvent |
national standard No. 6 solvent oil |
| tempreture of supplement water |
less than 25°C |
| Hardness |
less than 10 |
| volume of supplement water |
1-2m/t raw material |
| temperature of recycle water |
less than 32°C |
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