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Journal articles
Generation of streamwise vortices in a slice knife model: Can streaks be generated at the slice exit?, Solutions! & TAPPI JOURNAL, March 2004, Vol. 3(3) (655KB)
Generation of streamwise vortices in a slice knife model: Can streaks be generated at the slice exit?, Solutions! & TAPPI JOURNAL, March 2004, Vol. 3(3) (655KB)
Journal articles
Cationic latex as a multifunctional wet-end additive in highly filled paper, Solutions! & TAPPI JOURNAL, January 2004, Vol. 3(1) (398KB)
Cationic latex as a multifunctional wet-end additive in highly filled paper, Solutions! & TAPPI JOURNAL, January 2004, Vol. 3(1) (398KB)
Journal articles
Experimental and statistical investigation of drying effects on coated offset paper quality, Solutions! & TAPPI JOURNAL, July 2004, Vol. 3(7) (494KB)
Experimental and statistical investigation of drying effects on coated offset paper quality, Solutions! & TAPPI JOURNAL, July 2004, Vol. 3(7) (494KB)
Journal articles
Maximization of profit through optimal selection of inventory levels and production rates in pulp and paper mills, TAPPI JOURNAL, July 2003, Vol. 2(7) (166KB)
Maximization of profit through optimal selection of inventory levels and production rates in pulp and paper mills, Solutions! & TAPPI JOURNAL, July 2003, Vol. 2(7) (166KB)
Journal articles
Influence of fines on sheet delamination in condebelt drying and recyclability of condebelt-dried linerboard, TAPPI JOURNAL, June 2003, Vol. 2(6) (158KB)
Influence of fines on sheet delamination in condebelt drying and recyclability of condebelt-dried linerboard, Solutions! & TAPPI JOURNAL, June 2003, Vol. 2(6) (158KB)
Journal articles
Determination of load-bearing element length in paper using zero/short span tensile testing, TAPPI JOURNAL, August 2003, Vol. 2(8) (1132KB)
Determination of load-bearing element length in paper using zero/short span tensile testing, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (1132KB)
Journal articles
A new retention aid for the production of SC printing grades: pilot paper machine results, TAPPI JOURNAL, September 2003, Vol. 2(9) (255KB)
A new retention aid for the production of SC printing grades: pilot paper machine results, Solutions! & TAPPI JOURNAL, September 2003, Vol. 2(9) (255KB)
Journal articles
Sizing variations of dispersed rosin sizes with fortification, hardness, pH, and temperature, TAPPI JOURNAL, April 2003, Vol. 2(4) (93KB)
Sizing variations of dispersed rosin sizes with fortification, hardness, pH, and temperature, Solutions! & TAPPI JOURNAL, April 2003, Vol. 2(4) (93KB)
Journal articles
Rosin soap sizing without mordants by immersion in size solution, TAPPI JOURNAL, January 1997, Vol. 80(1)
Rosin soap sizing without mordants by immersion in size solution, TAPPI JOURNAL, January 1997, Vol. 80(1)
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.