The bean dregs are dried and dewatered using a mixing drum dryer. The high-humidity bean dregs are fed into the drum by a screw conveyor, and are continuously picked up and scattered under the squeegee, moving forward in a spiral manner. The built-in mixing paddle device fully stirs and breaks the materials.  Fully expand the heat exchange area between the material and the hot air, which solves the wall sticking site. At the same time, the drum dryer is equipped with a shock cleaning device to prevent the material from sticking to the cylinder wall and the material curtain is even, the heating area is large, and the passing rate High, to a large extent avoid the occurrence of paste.

    The bean dregs can reach a moisture content of about 35% in the mixing drum dryer and are discharged by the screw conveyor, enter the special crusher for semi-wet materials, the size of the crushed material is below 1mm, and enter the pulse air drying process. The material will drop rapidly within 10-15s. To less than 10%. (It can avoid the occurrence of saccharification and gelatinization of the material during the drying process, resulting in the appearance of the material being black), the cyclone unloader and the pulse bag dust collector are used to recover the dry powder, and the exhaust gas is discharged up to the standard to complete the entire drying process .