1.Screening:Removing the chaff and broken rice in the rice bran, in case of they will influence the oil yield and the desolvent of wet meal in the next process. In the process of puffing section, the general requirement of impurity is less than 3%, and the requirement of crude fiber is about 8%.
2.Magnetic separation :Clearing the iron impurity which migLD be in the rice brain. Since in the process of puffing, the iron impurity will be harmful to the screw of extrusion machine, affect the puffing effect. As the rice brain particles are small and poor liquidity, the iron impurities are always be wiped off by the magnetic barrels installed in the feeding port.
3.Quenching and tempering :it is the process of preheating so that to improve the temperature of the rice bran before puffing. After quenching and tempering the temperature will be controlled at 65--75 °C, and the moisture will be controlled at 10 ~12%. Thus, on the one side, it can increase the output of the extrusion machine, and on the other side, it can improve the quality of the puffed rice bran.
4.Puffing: the rice bran is injecting high pressure steam and high temperature water through the extrusion machine, so that it can improve the temperature and moisture in the extrusion machine,and can also form the high pressure to process the rice bran. All these can make the the rice bran become porous columnar structure from the original pulverized state.All these effectively passivate the activity of various of enzyme in the rice bran, and destroy the fat layer structure, so that it will be easier for the oil yield.
5.Drying:The moisture of puffed material comes from the extrusion machine is too big and the temperature is too high for direct leaching, the must be experience to process of drying and coo-ling, thus the moisture will reach 7%--9%, and temperature will reach 50-55°C. After puffing, the rice brain are usually dried and cooled by plat dryer.
edible canola oil refinery plant
Refining process of edible canola oil refinery plant
Crude oil Ã¢ÂÂ Degumming section Ã¢ÂÂ Decolorizing section Ã¢ÂÂ Deodorization section Ã¢ÂÂ Filter Ã¢ÂÂ End product oil
*** Degumming section: under 60-70ÃÂ°C,it occurs acid-base neutralization reaction with sodium hydroxide ,After stirring by reduction box,it can decrease the acid value in oil and separate the impurity ,phospholipid which will enter into soap stock.The oil can be refined further.
*** Decolorizing section:it removes water from oil by vacuum.The bleaching earth is breathed into bleaching pot ,after stirring,filtrated by filter and change the color of the oil.
*** Deodorization setion: The qualified decolored oil enters into the spiral plate heat exchanger to recover most of the heat, and next goes to high pressure steam heat exchanger to be heated to the process temperature (240-260ÃÂ°C) and then enters the deodorization tower. The upper layer of combined deodorization tower is the packing structure which is mainly used to remove the odor producing components such as free fatty acid (FFA);the bottom layer is the plate tower which is mainly for achieving the hot decoloring effect and reducing the peroxide value of the oil to zero.
Refining method of edible canola oil refinery plant
|3||Chemical and physical refining|
Final oil quality of edible canola oil refinery plant
|1||Grade one for salad oil|
|2||Grade two for high quality cooking oil|
|3||Grade three and four for cooking oil
edible canola oil refinery plant picture
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