Scaling in Alkaline Spent Pulping Liquor Evaporators ...
2015-1-1 · A heat treatment process (Liquor Heat Treatment system: LHT) for black liquor was installed in 1993 at Metsä-Sellu's Äänekoski kraft pulp mill in Finland. This process allows achieving high dry-solids contents by depolymerizing the long lignin and hemicellulose molecules in the liquor by the use of elevated temperatures.
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