The raw material with 80-85% moisture will be sent into the dewatering machine, and then the moisture will be reduced to 60-65%, then feed into the dryer by screw conveyor, concurrent flow drying. Under the effect of the inner shoveling plate, materials are taken and scattered constantly, and move in a spiral forward method. Through three layers (inner, middle and outer layer), heat exchange is realized between material and hot air medium. The materials that achieve the drying effect move forward fast and are discharged out of the roller. Wet materials that still don’t achieve drying effect couldn’t move fast due to self-weight and are dried completely during the controlling route, thus achieving drying effect. After the whole drying process is completed, materials are discharged by the screw conveyor. Inside the roller is installed with a vibrating cleaning device, which prevents materials from bonding to the cylinder wall.
