Enso-gutzeit Osakeyhtio

Enso-gutzeit Osakeyhito

Jorma Surakka

Matti Lankinen

Jouni Matula

Holger Engdahl

Jaakko Savolainen

Martti Tolvanen

Yrjo Luukkainen

Martti Pokkinen

Pekka Rabina

Jorma Makkonen

Erkki Valkama

Viljo Karkkainen

A hydrocyclone for dividing fiber suspensions into accept and reject fractions, said hydrocyclone being constituted by a conical separation chamber vertically positioned and having at its lower apex end an outlet aperture for the reject fraction, and a base part associated with the upper end of said separation chamber and provided with at least one inlet opening for the fiber suspension, an accept pipe being arranged coaxially with said separation chamber and said base and passing through the top of said base, said accept pipe having its lower inlet end at a level between said inlet opening for the fiber suspension and said outlet aperture for the reject fraction, and the outer surface of the accept pipe having the shape a truncated cone and being further provided with an annular projecting lip forming a discontinuity in said outer surface, the lower side of the lip, facing the reject outlet, having a curved concave shape in order to deflect part of the vortex impinging thereon back towards the reject outlet.

Hydrocyclone

Periodically operating pressure filter for the concentration of a solid matter suspension, comprising a filtering tank with an input conduit for introducing the suspension to be filtered under pressure, and a drain conduit for removal of the concentrated sludge, and a number of filtering elements suspended from the ceiling, through which the filtrate flows and which are internally in communication with a filtrate collecting tank located above and which thereby collect sludge on their outer surface. The sludge has been arranged to be periodically detached by making the pressure inside the filtering element higher than on its outside. The filtrate is under atmospheric pressure in the collecting tank. For detaching the sludge periodically from the outer surfaces on the filtering elements the pressure has been arranged to be removable from the filtering tank by opening for the suspension residing there, an exit flow, whereby the filtrate in the collecting tank will pass under hydrostatic pressure effect in counter-current fashion through the filtering elements.

Filters with filtrate chamber overflow partitions having plural outlets

Disk defibrator presenting a feed device for supplying the material which one desires to defibrate, such as wood chips, into the throat of the disk defibrator with the aid of a screw conveyor, the steam generated during the defibration process escaping through the feed device in countercurrent to the material flow and further passing to the atmosphere through an exit aperture on the feed device. The feed device includes two feed screws side by side with an intervening space into which the steam freely discharges.

Disk defibrator

A hydrocyclone assembly consisting of two identical hydrocyclones having accept tubes directed against each other so that the longitudinal axes of the hydrocyclones are aligned, and including a joint feed chamber and a joint accept chamber in which the combined accept fraction from the hydrocyclones accumulates. The accept ends of the hydrocyclones' accept tubes are connected with each other and the accept fractions are conducted into and combined in connecting ducts which communicate with the accept chamber.

Multiple hydrocyclone arrangement

Growing community of inventors

Savonlinna, Finland

Jorma Surakka