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AssigneeAndritz Inc.
InventorsHolger Engdahl, Jouni Jantti, Markku Lankinen, Antti Mattelmaki, Simo Suutari, Mika Kottila
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The present invention relates to a method of treating lime mud slurry being generated in a causticizing process in a pulp mill in a disc filter, in which method the lime mud is fed in the filter, thickened on the filter discs and removed from the filter discs. The lime mud is treated in at least two stages in one and the same disc filter in such a way that the lime mud slurry entering the filter is fed onto only a part of the filter discs, on which lime mud is thickened and removed from the discs, and the removed lime mud is re-slurried in liquid, and the lime mud slurry thus obtained is fed onto a second part of the filter discs, on which lime mud is thickened and removed from the filter and led into a subsequent process stage. The invention also relates to an apparatus.
A method of treating lime mud slurry being generated in a causticizing process at a pulp mill in a disc filter, in which method the lime mud is fed into the filter, the lime mud is thickened on filter discs and removed from the filter discs, characterized in that the lime mud is treated in at least two stages in one and the same disc filter so that
An apparatus for treating lime mud slurry, said apparatus comprising a shaft (10) provided with one or more flow channels, a number of filter discs (2) arranged on the shaft, the interior of which discs being connected to said one or more flow channels of the shaft for discharging filtrates, and driving equipment for the shaft for rotating the shaft and the discs in the lime mud slurry, devices for feeding the lime mud slurry and devices for re-moving the thickened lime mud from the apparatus, characterized in that the apparatus has at least two stages and comprises
Dependencies are inferred from the claim text.