rice bran extrusion

Rice bran extrusion is two kinds of dry expansion and wet extrusion. That is up from the dry puffing rice production line of rice bran directly into the dry extruder on the puffing. Wet expansion that is to inject a small amount of direct steam into the machine gun in the rice bran extrusion process to increase the temperature and humidity of the material in the extruder. Dry expansion, less equipment investment, simple process and can not puffed rice bran and extruded expanded feed special moisture and temperature regulation, but the equipment processing capacity is relatively small, power than wet expanded several times higher, rice bran extrusion mechanical wear quickly, and the passivation of the enzyme in rice bran is not thorough enough generally only suitable production scale is small. The advantage of wet extrusion is that the oil cells in the expansion process are destroyed thoroughly, the mechanical strength, particle size and capacity of the expanded material are significant, and the internal has more space.

Puffing process of rice bran lipase, lipoxygenase and phospholipase enzymes of passivation solution more thoroughly, the extracted crude oil acid value decreased, non water of phospholipid content reduced, and stored in the process of acid value rose slowly, the extracted crude oil quality. In addition, the introduction of direct steam puffing process and improve the temperature and moisture of rice bran, softened, thus improve the extruder output and mechanical wear and tear down, lower power consumption, in general 15KW.h/t. However, the water content of the material is high, up to 13-15%, and it needs to be equipped with a good cooling equipment to carry out the temperature and moisture adjustment, and the water can be reduced to 5%-7% to be leached, so the investment cost of the dry expansion process is large. rice bran extrusion Wet extrusion is a widely used process for large and medium rice bran oil extraction plant.