... 3. Low consumption 4. Easy to operate Rotary Sludge Dryer The Working Principles of the dryer ... source,crushing device,belt feeding machine, feeder,rotating drum,belt discharging machine, induced draft fan, discharging ... section, there is no lifting plate in the drum at this section, the material in this section ... slide to the dryer smoothly. The drying drum is a rotating cylinder which is tilted slightly ...