The time available for the various filtration steps (cake filtration, washing, air drying) can be adjusted via the filterĬontrol valve. The drum can be operated at various speeds to control cake thickness. The vacuum sucks the liquor through the filter medium and forms a filter cake out of the solids, contained in the feed slurry. A vacuum pump provides the necessary gas stream to accomplish dewatering. The drum deck, equipped with replaceable filter grids, supports the filter medium (cloth made from fabric or metal).
The filtration area on the drum surface is divided into separate cells, connected by individual pipes to a vacuum system.įiltrate piping can be arranged outside or inside of the drum. Everything happens during one revolution of the drum: with filter cake forming, cake drying, filtrate discharge and cake discharge for continuous production.
The drum filter’s basic operating principle is easy. The Dorr-Oliver Vacuum Drum Filter has high capacity, and runs very efficiently to create excellent filtrate clarity and effectively wash cakes.
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