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QCS Performance: Are you Safe, Reliable, and Optimized, and can you prove it?, TAPPICon25

Optimisation of optical coverage of board surfaces with assessment of light scattering and absorption using mineral as a coating component, TAPPICon25

Pigment loading level effects on water barrier properties in barrier coating formulations, TAPPICon25

Performance And Benefits Of Fiber Orientation CD Control with Bias Target Optimization, TAPPICon25

Energy and Emission Implications of Optimized White Liquor Chemistry, TAPPICon25

A Systems Thinking Approach: Institutional Memory Loss in Pulp and Paper Industry, TAPPICon25

Raw Material And Energy Savings On Tissue Machines With Low Capital Investment, TAPPICon25

Utilization of inline TDS measurement system in pulp mill’s brown stock washing line, TAPPICon25

Predicting paper breaks without you knowing it using BIG-AI, TAPPICon25

Optimization of energy efficiency and condensate production in evaporation plants for a modern softwood pulp mill, TAPPI Journal April 2026

ABSTRACT: To meet the need to further improve thermal efficiency and environmental performance of kraft pulp mills, new systems and techniques have been developed within the evaporation plant. This paper describes these novel approaches and how they were implemented in a project completed in 2018 for a new evaporator and condensate treatment system supplied by Valmet at the SCA Östrand market pulp mill in Sweden. This project was part of a stepwise upgrade of the complete mill to increase the production capacity of the mill from 430,000 to 900,000 air-dried metric tons/year (ADt/y). As part of this upgrade, the mill had the objectives to increase the energy efficiency of the pulp mill and to minimize the air emissions as much as possible, the effluent volume, and the water usage in the mill. The mill also wanted to have the disposal of the biosludge in the black liquor, and the production of tall oil from black liquor soap, liquid methanol, and turpentine. This required that the new evaporation and condensate treatment system be very closely integrated into the other process departments of the mill, including integration of the hot weak black liquor flash vapor from the digester directly into the evaporator train and the production of multiple streams of clean evaporation plant condensate at the correct temperature for the bleach plant. Heat and mass balance calculation values, which were found to do very well in predicting the effect on actual mill operation, are also presented in this paper.