Svevefiltre

Svevefiltre are filtration devices that use a sieving element to separate particles by size in a flow of liquid or gas. The central component is a screen or mesh that allows fluids to pass while capturing material above a certain size. Screens can be woven mesh, perforated plates, or wedge-wire configurations, chosen for corrosion resistance, mechanical strength, and the target particle size.

Operation typically involves mounting the sieve element on a vibratory or oscillating frame, which helps prevent buildup of retained solids and supports higher throughputs. The system can run in batch or continuous mode. In continuous operation, solids accumulate on the screen and are removed by cleaning mechanisms such as backflush with a cleaning fluid, air, or water spray, or by mechanical discharge of the screened section.

Design variants include self-cleaning configurations that use pulsed or vibrating actions to shed solids, while others rely on periodic shutdowns for screen cleaning. Materials used for the screens include stainless steel, duplex stainless steels, and other alloys, as well as certain plastics for chemically aggressive environments. Svevefiltre are used across industries where large throughputs and relatively coarse solids need to be separated from liquids or gases.

Applications span municipal water treatment, chemical processing, mining and mineral processing, pulp and paper, and food and beverage production. Advantages of svevefiltre include simple construction, continuous operation, and high flow rates, especially for coarse solids. Limitations include vulnerability to rapid fouling with fine particles, restricted pore size ranges, and the need for regular maintenance and screen replacement to maintain performance.