A Vacuum Filter Drum consists of a cylindrical filter membrane that is partly submerged in a slurry to be filtered.
The inside of the drum is held lower than the ambient pressure.
As the drum rotates through the slurry, the liquid is sucked through the membrane, leaving solids to cake on the membrane surface while the drum is submerged.
A knife or blade is positioned to scrape the product from the surface.
The technique is well suited to slurries, flocculated suspensions, and liquids with a high solid content, which could clog other forms of filter.
It is common to pre-coated with a filter aid, typically of diatomaceous earth (DE) or Perlite.
The Global Vacuum Drum Filter market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
Rotary Vacuum Drum Filters process slurry and discharge cake in a continuous process.
RVDFs can be used in wastewater treatment, sludge dewatering, chemical manufacturing, the pharmaceutical industry, cosmetics, mineral mining and refining, and the food processing industry.
RVDFs are 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, a 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 the slurry, the cake thickens. The Micronics Engineered Filtration Group is a trusted expert in Vacuum Filtration Solutions.
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.
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.
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