En anordning kalt 'TSS' - 'The Turbo Screening System', for filtrering og frakssjonering av suspensjoner som inneholder fibre, fiberfragmenter, finstoff og andre partikler

摘要

The invention concerns an apparatus which is capable of performing a continuous, self-cleaning mode of operation for filtering and fractionation of suspensions containing fibres, fibre fragments, fines and other particles. For filtering and fractionation is applied a continuous, perforated and electrolytically produced metal foil, with perforation holes in the order of 10 - 100 νm and foil thickness of same order. Open area varies between 5 % and 40 %. The suspension is jetted onto the metal surface by high pressure and velocity, whereby the filtrate is hurdled through the perforated foil whereas the solids which are sorted out are being retained on the foil surface and is continuously removed from same. A slow, oscillating movement causes a continuous cleansing of the perforation holes.