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Journal articles
Use of enzymes for reduction in refining energy - laboratory
Use of enzymes for reduction in refining energy - laboratory studies, TAPPI JOURNAL, November 2006
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.
Journal articles
NO2 treatment of kraft pulp followed by oxygen bleaching influence of black liquor, TAPPI JOURNAL, February 1990, Vol. 73(2)
NO2 treatment of kraft pulp followed by oxygen bleaching influence of black liquor, TAPPI JOURNAL, February 1990, Vol. 73(2)
Journal articles
Chemistry of chloroform formation in pulp bleaching: a review, TAPPI JOURNAL, June 1990, Vol. 73(6)
Chemistry of chloroform formation in pulp bleaching: a review, TAPPI JOURNAL, June 1990, Vol. 73(6)
Optimizing the control of a batch digester house with an int
Optimizing the control of a batch digester house with an integrated distributed control system, TAPPI JOURNAL, February 1991, Vol. 74(2)
Journal articles
Strategies for preventive maintenance in a modern pulp and paper mill, TAPPI JOURNAL, June 1991, Vol. 74(6)
Strategies for preventive maintenance in a modern pulp and paper mill, TAPPI JOURNAL, June 1991, Vol. 74(6)
Magazine articles
Highly corrosion-resistant metals for the pulp and paper industry, TAPPI JOURNAL, March 1991, Vol. 74(3)
Highly corrosion-resistant metals for the pulp and paper industry, TAPPI JOURNAL, March 1991, Vol. 74(3)
Journal articles
Low-chlorine bleaching with nitrosylsulfuric acid pretreatment, TAPPI JOURNAL, October 1991, Vol. 74(10)
Low-chlorine bleaching with nitrosylsulfuric acid pretreatment, TAPPI JOURNAL, October 1991, Vol. 74(10)
Journal articles
Heavy metal analysis of inks: a survey, TAPPI JOURNAL, April 1992, Vol. 75(4)
Heavy metal analysis of inks: a survey, TAPPI JOURNAL, April 1992, Vol. 75(4)
Journal articles
Newsprint from blends of kenaf ctmp and deinked recycled newsprint, TAPPI JOURNAL, December 1992, Vol. 75(12)
Newsprint from blends of kenaf ctmp and deinked recycled newsprint, TAPPI JOURNAL, December 1992, Vol. 75(12)