What is true about rotary drum vacuum filter?

Rotary vacuum drum filter (RVDF), patented in 1872, is one of the oldest filters used in the industrial liquid-solids separation. It offers a wide range of industrial processing flow sheets and provides a flexible application of dewatering, washing and/or clarification.

How does a rotary drum vacuum filter work?

How does it work?

1. As the drum rotates, it is partially submerged in the feed slurry.
2. Vacuum draws liquid through the filter medium (cloth) on the drum surface which retains the solids.
3. The vacuum pulls air (or gas) through the cake and continues to remove moisture as the drum rotates.

What kind of filter is used in Eimco KCP?

The Eimco KCP Pre-coat drum filters are coated with a bed of diatomaceous earth or similar material. During cycling a clear filtrate is obtained.

When to use a continuous vacuum drum filter?

EIMCO-K.C.P. Continuous vacuum drum filters are designed to handle the broadest range of slurries of any filter. This permit drum filters to be used in a variety of applications. Vacuum filters allow a more complete separation of solids from liquids than other mechanical dewatering filters.

How does the Dorr Oliver vacuum drum filter work?

Slurry is continuously fed into the filter vat and an adjustable overflow weir controls the liquid level. For efficient operation of the filter, the vat is equipped with an agitator to prevent solids from settling. Cake discharge takes place on the descending side of the drum.

How does a vacuum pump work in a dewatering drum?

A vacuum pump provides the necessary gas stream to accomplish dewatering. The vacuum sucks the liquor through the filter medium and forms a filter cake out of the solids, contained in the feed slurry. The drum can be operated at various speeds to control cake thickness.