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Journal articles
Dust and flue gas chemistry during rapid changes in the operation of black liquor recovery boilersâ??Part 3: Gaseous emissions, TAPPI JOURNAL, September 2002 (195KB)
Dust and flue gas chemistry during rapid changes in the operation of black liquor recovery boilers—Part 3: Gaseous emissions, Solutions! & TAPPI JOURNAL, September 2002 (195KB)
Journal articles
AOX formation in ECF bleaching at different kappa numbersâ??influence of oxygen delignification and hexenuronic acid content, TAPPI JOURNAL, September 2002 (141KB)
AOX formation in ECF bleaching at different kappa numbers—influence of oxygen delignification and hexenuronic acid content, Solutions! & TAPPI JOURNAL, September 2002 (141KB)
Journal articles
Current status of the pure oxygen activated sludge process in Canadian mills, TAPPI JOURNAL, November 2003, Vol. 2(11) (124KB)
Current status of the pure oxygen activated sludge process in Canadian mills, Solutions! & TAPPI JOURNAL, November 2003, Vol. 2(11) (124KB)
Journal articles
Virtual bleach plants, Part 3: Caustic extraction and peroxide bleaching models, TAPPI JOURNAL, October 2003, Vol. 2(10) (280KB)
Virtual bleach plants, Part 3: Caustic extraction and peroxide bleaching models, Solutions! & TAPPI JOURNAL, October 2003, Vol. 2(10) (280KB)
Journal articles
Gas chromatographic analysis of acetone extractives in lodgepole pine and western hemlock thermomechanical pulp furnish, TAPPI JOURNAL, September 2002 (177KB)
Gas chromatographic analysis of acetone extractives in lodgepole pine and western hemlock thermomechanical pulp furnish, Solutions! & TAPPI JOURNAL, September 2002 (177KB)
Journal articles
Factors affecting fatty acid oxidation and the formation of odorous aldehydes during tmp production, TAPPI JOURNAL, July 2003, Vol. 2(7) (99KB)
Factors affecting fatty acid oxidation and the formation of odorous aldehydes during tmp production, Solutions & TAPPI JOURNAL, July 2003, Vol. 2(7) (99KB)
Journal articles
Behavior of certain components in the vacuum drum washer after the first D stage in ECF bleaching, TAPPI JOURNAL, September 2003, Vol. 2(9) (172KB)
Behavior of certain components in the vacuum drum washer after the first D stage in ECF bleaching, Solutions! & TAPPI JOURNAL, September 2003, Vol. 2(9) (172KB)
Journal articles
Factors contributing to calcium oxalate scale at the Simpson Tacoma Kraft mill, TAPPI JOURNAL, February 2003, Vol. 2(2) (247KB)
Factors contributing to calcium oxalate scale at the Simpson Tacoma Kraft mill, Solutions! & TAPPI JOURNAL, February 2003, Vol. 2(2) (247KB)
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.