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Journal articles
Hexenuronic acid contents of eucalyptus globulus kraft pulps: variation with pulping conditions and effect on ecf bleachability, Solutions! & TAPPI JOURNAL, May 2003, Vol. 2(5) (188KB)
Hexenuronic acid contents of eucalyptus globulus kraft pulps: variation with pulping conditions and effect on ecf bleachability, Solutions! & TAPPI JOURNAL, May 2003, Vol. 2(5) (188KB)
Journal articles
Formation of AOX and OCl in ECF bleaching of birch pulp, Solutions! & TAPPI JOURNAL, August 2004, Vol. 3(8) (194KB)
Formation of AOX and OCl in ECF bleaching of birch pulp, Solutions! & TAPPI JOURNAL, August 2004, Vol. 3(8) (194KB)
Journal articles
Pulp properties and effluent characteristics from the Mg(OH)2 - based peroxide bleaching process,TAPPI JOURNAL & Solutions! December 2004
Pulp properties and effluent characteristics from the Mg(OH)2 - based peroxide bleaching process,TAPPI JOURNAL & Solutions! December 2004
Journal articles
Prediction of metals distribution in mill processes, part 3 of 3: npe management in kraft chemical recovery, Solutions! & TAPPI JOURNAL, March 2004, Vol. 3(3) (170KB)
Prediction of metals distribution in mill processes, part 3 of 3: npe management in kraft chemical recovery, Solutions! & TAPPI JOURNAL, March 2004, Vol. 3(3) (170KB)
Journal articles
Accelerated light exposure of wood-containing pulps. part I: effects of wavelength and intensity, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (726KB)
Accelerated light exposure of wood-containing pulps. part I: effects of wavelength and intensity, Solutions! & TAPPI JOURNAL, October 2004, Vol. 3(10) (726KB)
Journal articles
Minimizing baso4 scale formation In ecf bleach plants, TAPPI JOURNAL, March 2003, Vol. 2(3) (119KB)
Minimizing baso4 scale formation In ecf bleach plants, Solutions! & TAPPI JOURNAL, March 2003, Vol. 2(3) (119KB)
Journal articles
TRS inventories and air dispersion modeling for odor reduction at a kraft mill with an activated sludge treatment plant, TAPPI JOURNAL, April 2002 (281KB)
TRS inventories and air dispersion modeling for odor reduction at a kraft mill with an activated sludge treatment plant, SOLUTIONS! & TAPPI JOURNAL, April 2002 (281KB)
Journal articles
Substitution of aspen high-yield pulp for hardwood kraft pulp in fine papers and its effect on AKD sizing, Solutions! & TAPPI JOURNAL, August 2004, Vol. 3(8) (186KB)
Substitution of aspen high-yield pulp for hardwood kraft pulp in fine papers and its effect on AKD sizing, Solutions! & TAPPI JOURNAL, August 2004, Vol. 3(8) (186KB)
Journal articles
Deinking of recycled mixed office paper using two endo-glucanases, celb and cele, from the anaerobic fungus orpinomyces pc-2, TAPPI JOURNAL, July 2003, Vol. 2(7) (108KB)
Deinking of recycled mixed office paper using two endo-glucanases, celb and cele, from the anaerobic fungus orpinomyces pc-2, Solutions! & TAPPI JOURNAL, July 2003, Vol. 2(7) (108KB)
Journal articles
Magazine articles
Recovery boiler back-end heat recovery, TAPPI Journal March 2023
ABSTRACT: Sustainability and efficient use of resources are becoming increasingly important aspects in the operation of all industries. Recently, some biomass-fired boilers have been equipped with increasingly complex condensing back-end heat recovery solutions, sometimes also using heat pumps to upgrade the low-grade heat. In kraft recovery boilers, however, scrubbers are still mainly for gas cleaning, with only simple heat recovery solutions. In this paper, we use process simulation software to study the potential to improve the power generation and energy efficiency by applying condensing back-end heat recovery on a recovery boiler. Different configurations are considered, including heat pumps. Potential streams to serve as heat sinks are considered and evaluated. Lowering the recovery boiler flue gas temperature to approximately 65°C significantly decreases the flue gas losses. The heat can be recovered as hot water, which is used to partially replace low-pressure (LP) steam, making more steam available for the condensing steam turbine portion for increased power generation. The results indicate that in a simple condensing plant, some 1%•4% additional electricity could be generated. In a Nordic mill that provides district heating, even more additional electricity generation, up to 6%, could be achieved. Provided the availability of sufficient low-temperature heat sinks to use the recovered heat, as well as sufficient condensing turbine swallowing capacity to utilize the LP steam, the use of scrubbing and possibly upgrading the heat using heat pumps appears potentially useful.