Kvaerner Pulping Ab

Anders Henrik Wernqvist

Lars Gunnar Olausson

Olle Wennberg

Mikael Johansson

Lars Eric Pettersson

Michael Thiede

Olof Tryggve Wennberg

Martin Collander

Krister Strom

A process for evaporating spent liquor or other waste liquids from cellulose cooking, The evaporation is performed in a multiplicity of evaporators which are coupled in series and in which the evaporation is driven using the liquor steam. The condensates from the steam are divided, in one of more effects, into at least two fractions with respect to purity. The parer fraction from one effect is conveyed, at a high level, into a subsequent effect in the direction of movement of the liquor, while the dirtier fraction is conveyed, at a high level or at the very top, into a preceding effect in the direction of movement of the liquor.

Process for purifying condensate while evaporating waste liquors

An evaporation apparatus for evaporation of, for example, spent liquor from pulp cooking. The apparatus has a vertical cylinder that has evaporation surfaces disposed therein. An outlet opening is defined in a widened part of the cylinder to receive driven-off steam. A skirt is disposed in the cylinder and surrounds the evaporated liquid and driven-off steam and has a diameter that is smaller than a diameter of the widened part. The skirt has an open bottom and a skirt opening is defined in a portion of the skirt that is facing away from the outlet opening.

Evaporation apparatus for evaporation of liquids

Process for treatment of a contaminated liquid

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Göteborg, Sweden

Anders Henrik Wernqvist