Vacuum and/or pressure filtration device for filtration of a suspension

A vacuum and/or pressure filtration device for filtration of a suspension which comprises a solid and a liquid, the device comprising a filter drum, wherein the filter drum defines a drum axis, the filter drum is rotatably supported around the drum axis, the filter drum includes

• an outer jacket by which a plurality of filter cells are formed, the plurality of filter cells extend along the drum axis, the plurality of filter cells are arranged adjacent to each other all around the drum axis and the plurality of filter cells are equipped on their outer side with a filter medium;
• an inner jacket is arranged adjacent to the outer jacket, the inner jacket has an inner jacket outer surface which limits the filter cells radially inside such that by the inner jacket outer surface a plurality of draining surfaces are formed and on which the liquid passing through the respective filter medium during filtration of the suspension can drain off as a filtrate, and the inner jacket is formed along the drum axis in a manner so as to be conically tapered at least toward a first drum end face of the filter drum such that the respective draining surface correspondingly extends at least toward the first drum end face of the filter drum in a manner so as to be inclined radially and inwardly;
• and
• a first drum end face-sided plate including a plurality of discharge channels that are embedded in and integrally formed within the first drum end face-sided plate, which discharge channels are respectively assigned to the filter cells, for discharging the filtrate, wherein the respective draining surface is fluidly connected to a respectively assigned one of the discharge channels, and
• wherein the first drum end face-sided plate is equipped with a plurality of recesses along its outer circumference,
• the plurality of recesses are respectively assigned to the discharge channels, the plurality of recesses form an inlet of the respectively assigned discharge channel into which the respectively assigned draining surface leads and formed in a manner so as to be tapered toward the discharge channel such that the respective discharge channel is connected to the assigned recess at the radially innermost site of said assigned recess,
• the first drum end face-sided plate includes a first load-bearing inner support plate and an outer functional plate which is directly supported by the first load-bearing inner support plate and in which the discharge channels and the recesses are formed in a manner so as to be isolated from the first load-bearing inner support plate such that the first load-bearing inner support plate is fluidly isolated from the suspension and the filtrate passing through the discharge channels and the recesses during use,
• the outer functional plate is a monolithic structure, and
• the discharge channels include elongated cavities embedded within the outer functional plate.