Abstract
New cooking and bleaching processes in the modern pulp mills demand a more effective way to remove harmful or non-process substances from the green liquor. To satisfy these demands, Ahlstrom has designed a new-type falling film cross-flow filtrator process (X-Filter) to eliminate completely the accumulation of certain harmful and alkaline insoluble substances into recovery cycle. This basic idea was at first time introduced in Japan Spring 1994.
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