Rumpusiivilä

Rumpusiivilä is a Finnish term that translates to "drum sieve" or "drum filter." It refers to a type of cylindrical screen used in various industrial processes, particularly in the pulp and paper industry, as well as in wastewater treatment. The primary function of a rumpusiivilä is to separate solid particles from a liquid stream.

The device typically consists of a rotating drum that is covered with a perforated screen or mesh. The slurry or liquid containing solids is fed into the interior of the drum. As the drum rotates, the liquid passes through the perforations, leaving the larger solid particles on the inside surface of the screen. The separated solids are then conveyed away, often by a screw mechanism or by the action of the rotating drum itself, and collected.

Rumpusiivilät are valued for their continuous operation, relatively simple design, and effectiveness in dewatering and screening. They can handle large volumes of material and are used in applications such as removing fiber fines from paper machine white water, thickening sludge in wastewater treatment plants, and separating solids from process streams in the chemical industry. The size of the perforations in the screen can be varied to suit the specific separation requirements of the application. Maintenance typically involves cleaning the screen to prevent clogging.