The Auto-Vac® Rotary Vacuum Drum Precoat Filter (RVDF) is ALAR's flagship dewatering technology. The Auto-Vac® microfiltration design handles a wide range of volumes with various solids loadings. Its self-cleaning feature maintains consistent filtration rates without clogging, blinding or bottlenecks. The rotary vacuum filters (also called drum filters) enable an efficient filtering in a continuous cycle with perfect results. Compare this product Remove from comparison tool. Belt vacuum rotary drum. Sefar produces belts and drum filter covers for different filter.
Rotary Vacuum Drum Filters process slurry and discharge cake in a continuous process. RVDFs can be used in waste water treatment, sludge dewatering, chemical manufacturing, the pharmaceutical industry, cosmetics, mineral mining and refining, and the food processing industry. It is ideal for a slurry with variable cake thickness, moisture content, and stickiness.
Slurry sits in a tank with a partially submerged drum. As the drum rotates into slurry, vacuum pulls the liquor through the industrial filter media, trapping the solid particles on its surface, forming a cake. As the drum continues to travel through slurry, the cake thickens.
As the drum emerges from the slurry tank, spray bars wash the cake, allowing air, water, and the remaining liquor to travel through the drum section into piping, through the valve, and into a vacuum receiver.
As the rotary vacuum drum filter begins to rotate facing the ceiling, it enters the drying zone. The drum remains under vacuum, pulling air through the cake for more dewatering.
Rotary Vacuum Filter
The drum then reaches its discharge zone as it roll to the position just over the slurry tank. Drum filters discharge in a variety of ways; scraper discharge, belt discharge, string discharge, roll discharge, and pre-coat discharge.