Different varieties of rapeseed have different oil yield. In addition, the climatic conditions of rape planting will also affect the fullness and oil content of rape. It is normal for some areas to get about 38%, mainly because the local climate conditions are good. The best rapeseed is in Qinghai, 100 kg rapeseed can yield more than 40 kg oil.
Generally 100 kg rapeseed produces about 37 kg of oil, with an oil yield of about 40%, and 40 kg of oil can be squeezed out. Mainly depends on the quality of rapeseed and the quality of oil press equipment. According to national standards, the oil content of 1 is 40%, 2%, 3%, 4%, 5%, 6%, 7% and 8%, all of which are 33%.
Method for improving oil yield of rape
The oil yield of rapeseed is generally only 30% ~ 40%. Using the following technology, the oil yield can be increased by 25%.
1, remove impurities. The sediment contained in rapeseed will absorb oil during processing, thus reducing the oil yield. Therefore, impurities such as sediment should be screened out before rapeseed processing.
2. Control the fire. Generally, rapeseed is fried in a pot. Only when all rapeseed is cooked, each batch of rapeseed will stick to the bottom of the pot and be burnt. Therefore, when rapeseed is fried to 80% maturity, it is necessary to hit the stove mouth, seal the tuyere and control the fire. The specific operation method is: a movable groove is built on the wall of the furnace mouth and a movable iron plate is embedded. When a fire is needed, lift the iron plate upwards to seal the furnace mouth; When slow fire is needed, put down the iron plate and seal the tuyere.