WorkingRotary drum filters are divided into several sections, including a pick-up area, a drain area, a cleaning area, a drying area, and a cake removal area. Sprays are affixed to the cake to wash it. The multifilament strings are strung across the breadth of the fabric. The filter cloth retains the cake during the cycle. Clippers are used to join the cloth ends. Filter cloth is fastened to the face of the drum using specific caulking strands inserted into grooved strips.

The agitator is employed to keep the slurry homogeneous. During the cycle, a valve with a bridge setting controls the vacuum, blow, and dead zone, so each sector is subjected to all of them. Certain filter adjustable blocks are located on the valve. Internally, each sector is connected to the drum center via a revolving valve. The drum's face is split into circumferential sectors, each of which forms a distinct vacuum cell. The drum revolves at a pace of less than one revolution per minute. The vacuum in the drum continues to suck air through the cake, further dewatering it.ĬonstructionIt is made up of a hollow horizontal metal drum that ranges in length from 1 to 20 feet. The drying zone is entered when the rotating vacuum drum filter begins to revolve toward the ceiling. As the drum moves through the sludge, the cake thickens.īy spraying water, air, and leftover liquor through the drum section into piping and a vacuum receiver when it emerges from the slurry tank, spray bars wash the cake. While the drum rotates, the vacuum pulls the liquid through the industrial filter, trapping the solids on the surface and creating the cake. A half-submerged drum lies in a tank of slurry. It's perfect for slurry with varying cake thickness, moisture content, and stickiness. The RVDF is used in many different fields including waste water treatment, sludge dewatering, chemical manufacturing, pharmaceutical manufacturing, cosmetics, mineral mining and refining, and food processing. Rotatory Drum Filter PrincipleContinuous slurry and cake processing is accomplished using Rotary Vacuum Drum Filters.

Rotary vacuum filter pdf