Search

Use the search bar or filters below to find any TAPPI product or publication.

Showing 41–50 of 1,979 results (Duration : 0.011 seconds)

Filters

Industry

Topics

Content Type

Publications

Level of Knowledge

Committees

Collections

Journal articles
Open Access
Performance of a final hydrogen peroxide stage in the ECF bleaching of Eucalypt DOEOPD1 Kraft Pulps

Performance of a final hydrogen peroxide stage in the ECF bleaching of Eucalypt D0EOPD1 kraft pulps, TAPPI JOURNAL, August 2008

Journal articles
Open Access
Chemical treatment in mechanical pulping, part 5: sulfite pretreatment, TAPPI JOURNAL, August 2003, Vol. 2(8) (179KB)

Chemical treatment in mechanical pulping, part 5: sulfite pretreatment, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (179KB)

Journal articles
Open Access
Virtual Bleach Plants part 1. mill applications, Solutions! & TAPPI JOURNAL, June 2003, Vol. 2(6) (144KB)

Virtual Bleach Plants part 1. mill applications, Solutions! & TAPPI JOURNAL, June 2003, Vol. 2(6) (144KB)

Journal articles
Open Access
PET Recyclable Polymer for Making Paper Washbowls, TAPPI JOURNAL May 2008

PET Recyclable Polymer for Making Paper Washbowls, TAPPI JOURNAL May 2008

Journal articles
Open Access
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
Open Access
Hard-to-remove water in cellulose fibers characterized by thermal analysis: A model for the drying of wood-based fibers, TAPPI JOURNAL, July 2007

Hard-to-remove water in cellulose fibers characterized by thermal analysis: A model for the drying of wood-based fibers, TAPPI JOURNAL, July 2007

Journal articles
Open Access
Dynamic Modeling of Pressurized Peroxide Stages With Application to Full Bleach Plant Simulation, TAPPI JOURNAL, February 2007

Dynamic Modeling of Pressurized Peroxide Stages With Application to Full Bleach Plant Simulation, TAPPI JOURNAL, February 2007

Journal articles
Open Access
Correlation Between Nodule size and Residual Carbonate Content in Lime Kilns, TAPPI JOURNAL, April 2007

Correlation Between Nodule size and Residual Carbonate Content in Lime Kilns, TAPPI JOURNAL, April 2007

Journal articles
Open Access
An investigation of factors affecting steambox heating effectiveness, TAPPI JOURNAL, September 2002 (165KB)

An investigation of factors affecting steambox heating effectiveness, Solutions! & TAPPI JOURNAL, September 2002 (165KB)

Journal articles
Magazine articles
Open Access
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.

Inside this Section