Andritz Oy

Tommi Hammarberg

Petri Tarjavuori

Simo Suutari

Matti Mantsinen

Sonja Hirvasniemi

A sealing arrangement () for a shaft, including at least a first seal element () arranged around the shaft (); at least a second seal element () arranged around the shaft (); wherein the first () and second () seal element include adjustable seal elements, wherein the first () and second () seal element include, respectively, an outer shell () of elastic material and a hollow core (), wherein the hollow core () of the first () and/or the second () seal element is pressurized with a fluid for an adjustable sealing effect.

Sealing arrangement

Method and apparatus for reducing the thickness of a precoat-layer accumulated on the filtering surface of a filter disc from a solids-containing suspension in a basin of a disc filter, said disc filter having two or more filter discs arranged on a shaft and between them at least one drop chute provided with a scraper on both sides, which scraper scrapes the cake filtered from the suspension on the filtering surfaces of the filter discs into the drop, the layer thickness of the precoat on the filtering surface is reduced by shortening the distance between the tips of the scrapers and the filtering surface, and the precoat thickness reduction is accomplished for the precoats on the filtering surface of the two filter discs on both sides of the drop chute non-simultaneously.

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Joutseno, Finland

Tommi Hammarberg