Dingsheng Machine is a leading manufacturer specializing in edible oil processing solutions and equipment in China. We provide complete plant solutions for converting rapeseed/canola to rapeseed/canola oil and protein. Our comprehensive range of products helps you to increase output while meeting increasingly stringent environmental and health requirements. When you have a project plan for the rapeseed/canola oil processing plant, please contact us soon.
Technology Process
Rapeseed oil comes from the seeds of rapeseed plants. You have to clean the seeds first, to remove sediment, iron dusts, stones, fibers and other impurities in rapeseed, then perform other processes to extract oil. There are two types of producing rapeseed oil: one by cold pressing and filtration, the other by applying heat and pressing the seeds, which named hot pressing.
1，RAPESEED OIL PRESSING PROCESS
Cold pressing is the simple and traditional method of producing oil. If the output is small, such as less than 5 tons per day, we can use a spiral or hydraulic type oil press. The seed is simply squeezed at a low temperature, which means that the oils natural rich golden colour and nutrients are preserved.
Once the oil has settled, it is filtered and then bottled. It really is as simple as that. No heat, no chemicals just pure and healthy homegrown oil. We only press our seed once, this ensures that we only produce the highest quality, undiluted cold pressed rapeseed oil.
Another method is called hot pressing, which is one of the important processes in the oil extracting process, through steamed or fried to adjust the humidity and temperature of the rapeseed, to make the rapeseed pressing process more smoothly.
Then the rapeseed is mechanically pressed to extract approximately half to three quarters of the available oil so that the solvent extraction can be run more efficiently.
2，RAPESEED OIL CAKE SOLVENT EXTRACTION PROCESS
After the pre-pressed rapeseed cakes enter the rapeseed cake solvent extraction section, the extraction system uses the principle of solvents and oil to dissolve from rapeseed oil from rapeseed cakes.
After solvent extraction process, we can obtain the crude oil containing solvents and the wet meal containing solvents.
- The wet meal desolvation system removes the solvent in the wet meal and obtains the dry meal, which can be used to make animal feed.
- The mixed oil vaporated stripping system removes the solvent in the crude oil to get more pure oil.
- The solvent recovery system recovered the solvent removed from the above two systems and reused.
3，RAPESEED CRUDE OIL REFINING PROCESS
Extracted and desolventized rapeseed oil must be further processed to make an edible product. Edible oils are refined to improve the flavor, odor, color and stability using processes that degum, neutralize, bleach and deodorize the oil.
These refining processes will remove contaminants such as phosphatides, free fatty acids and pro-oxidants. The components of refined rapeseed oil meet national standards and can be sold in the market.
Further processing of oils and fats is sometimes desired. Some oils are winterized or dewaxed and some are modified to change melting characteristics. Byproducts may be further processed to create value-added products or reduce costs.
4，RAPESEED OIL BY-PRODUCTS PROCESS
For example, recover crude protein from the the rapeseed cake, and extracted the biological diesel and fatty acids from the rapeseed oil. Dingsheng Machine is committed to optimizing technology processes, reuse processing by-products while increasing annual output, help rapeseed oil mill achieve higher processing capacity and improve their products quality and profit.
Dingsheng Machine provides a full set of rapeseed oil production lines, mainly includes rapeseed pretreatment equipment, rapeseed oil pressing equipment, rapeseed oil cake extraction equipment, crude oil refining equipment, and by-product processing equipment.
Our comprehensive range of products helps you to increase yield while meeting increasingly stringent environmental and health requirements. When you have a project plan for the rapeseed oil processing plant, please contact us soon.
Technology Feature
The cold-pressed method is healthier since it doesn’t undergo multiple processes such as high-temperature refining and the addition of chemicals, just pure and healthy homegrown oil.
Rapeseed oil desolventizing process, a distillation system is used to recover the solvent. The desolventized flakes are now a product and ready for sale as a good source of protein. The canola or rapeseed oil can be further refined from a crude product to an edible product.
Recover crude protein from the the rapeseed cake, and extracted the biological diesel and fatty acids from the rapeseed oil, reuse processing by-products while increasing annual output, help rapeseed oil mill achieve higher processing capacity and improve their products quality and profit.
