Ahlstrom Machinery Oy

Ari Pelkio

Raimo O Kohonen

Seppo Lukkarinen

A disc filter assembly includes a number of filter discs mounted in a vat by a horizontal shaft with an inter-disc volume between the discs. A feed mechanism is provided that makes it possible to feed the pulp suspension onto the surface of the liquid, directed toward the most concentrated pulp in the vat, in such a manner that the feed is insensitive to fluctuations of the suspension surface level in the vat. This is accomplished by feeding the suspension into the vat interior directly into each of the inter-disc volumes, as by using a chute (which may have the approximate configuration of a hollow triangular parallelepiped) for each volume. A header for supplying pulp suspension to the chutes may be mounted on or spaced from the sidewall of the vat, or above the vat.

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Savonlinna, Finland

Ari Pelkio