Rice bran oil pretreatment machine
vegetable oil plant
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 might 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...