Drum thickener IFD

for sludge treatment

The dinamic sludge thickener is installed whenever it is necessary to reduce the percentage of water contained in the organic or inorganic sludge. It consists of a frame, a drum comprising a filtering net and a stationary screw for the sludge conveying, a discharge hopper and a variable speed drive. The sludge entering the drum losses about the 90% of its water contents through the filtering net. The thickened sludge is moved toward the discharge by means of the screw which is integral with the drum. A special sludge mixer is provided on the drum head, while the remaining surface is covered with a filtering sheet. During the rotation, the drum is sustained by nylon wheels supported by bearings and its speed can be controlled thanks to the variable speed drive which ensures the running speed suitable for the type of sludge to be thickened. The filtering net of the thickener is self-cleaning as it is continuously washed by the drain water; the equipment is however provided with nozzles which allow the periodical cleaning of the screen with pressurized water. Moreover, the brush system operated by means of a handwheel allows nozzles cleaning. The frame is made of closed and shaped sections. During the operation the equipment is completely closed for the operators’ safety but the cover can be opened easily for internal inspections.