Abstract: A vortex cleaner for fractionating particle-liquid suspensions comprises an elongate, upstanding vortex chamber having a circular cross-section and narrowing downwardly to its bottom end. A substantially tangential suspension inlet means is disposed in the wider end of the vortex chamber and a further chamber located axially above the wider end of the vortex chamber. The cleaner further comprises a light-fraction outlet means having pipe means which projects axially into the wider end of the vortex chamber and has a smaller diameter than said wider end, and the upper outlet end of which pipe means opens into the further chamber. A heavy-fraction outlet means is disposed at the narrow end of the vortex chamber, and a light-fraction outlet opening is located in the further chamber axially beneath the upper outlet end of the pipe means, this further chamber extending co-axially with and around the pipe means in a manner to enclose the upper end thereof and to form a space above the outlet end of the pipe means.

Abstract: A vortex cleaner for separating fibre-liquid-suspensions, and in particular paper-pulp suspensions, into fractions, comprises an elongate vortex chamber (1) of circular cross-section, which over a part (3) of its length tapers towards its one end. At the wider end of the chamber there is provided a substantially tangentially directed inlet (4) for the suspension to be treated, and an axially directed outlet (6) for a lighter fraction of the treated suspension. At the narrower end of the chamber there is provided a second, axially directed outlet (7) for a heavier fraction of the treated suspension.

Abstract: A vortex cleaner for separating fibrous suspensions into fractions, in particular for cleaning papermaking pulp suspensions from impurities as chips, shives, sand grains, metal particles, etc., comprises an elongate vortex chamber, which has a circular cross-section and which over part of its length tapers towards its one axial end. The larger end of this vortex chamber has at least one tangential inlet for the suspension to be treated and an axial accept outlet for a lighter fraction of the treated suspension. The smaller end of the vortex chamber has an axial reject outlet for a heavier fraction of the treated suspension. The tapering part of the vortex chamber has a boundary wall which consists of one or preferably two ledges, which face the larger end of the vortex chamber and extend helically with diminishing diameter towards the smaller end of the vortex chamber, and a sidewall interconnecting the consecutive convolutions of said ledge or ledges.

Abstract: A vortex cleaner for separating a gaseous or liquid suspension, as for instance a paper pulp suspension, into fractions comprises an elongate vortex chamber which has a circular cross-section and tapers gradually, over at least part of its axial length, towards one axial end of the chamber. The larger end of the vortex chamber is provided with a tangential inlet for the suspension to be treated and an axial outlet for a lighter fraction of the treated suspension. The smaller end of the vortex chamber is provided with an axial outlet for a heavier fraction of the treated suspension. The tapering portion of the vortex chamber consists of a plurality of chamber sections, which are disposed one after the other in axial direction and are in direct communication with each other.