Search

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

Showing 71–80 of 1,028 results (Duration : 0.013 seconds)

Filters

Industry

Topics

Content Type

Publications

Level of Knowledge

Committees

Collections

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.

Journal articles
Open Access
Clonal forestry and genetic engineering: where we stand, future prospects, and potential impacts on mill operations, TAPPI JOURNAL, February 1998, Vol. 81(2)

Clonal forestry and genetic engineering: where we stand, future prospects, and potential impacts on mill operations, TAPPI JOURNAL, February 1998, Vol. 81(2)

Journal articles
Open Access
Champion international's long log pine chip mill: a nontraditional approach, TAPPI JOURNAL, February 1998, Vol. 81(2)

Champion international's long log pine chip mill: a nontraditional approach, TAPPI JOURNAL, February 1998, Vol. 81(2)

Journal articles
Open Access
A man of ideas: 1998 Gunnar Nicholson Gold Medalist Douglas Wahren, TAPPI JOURNAL, February 1998, Vol. 81(2)

A man of ideas: 1998 gunnar nicholson gold medalist douglas wahren, TAPPI JOURNAL, February 1998, Vol. 81(2)

Journal articles
Open Access
An Improved method for analyzing resin acid in wood, pulp, process water, and effluent samples, TAPPI JOURNAL, April 2000, Vol. 83(4)

An Improved method for analyzing resin acid in wood, pulp, process water, and effluent samples, TAPPI JOURNAL, April 2000, Vol. 83(4)

Journal articles
Open Access
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)

Journal articles
Open Access
Treating bleaching effluent for suspended solids and color, TAPPI JOURNAL September 1989

Treating bleaching effluent for suspended solids and color, TAPPI JOURNAL September 1989

Journal articles
Magazine articles
Open Access
Ultrastructural Behavior of Cell Wall Polysaxxharides, TAPPI Journal April 2022

ABSTRACT: Considerable information on the ultrastructural organization of the plant cell wall and the supermolecular arragement of the cell wall components, in particular of cellulose, has been obtained with the electron microscope.

Journal articles
Open Access
Conference review: Recycling sessions at TAPPI PEERS, TAPPI JOURNAL February 2012

Conference review: Recycling sessions at TAPPI PEERS, TAPPI JOURNAL February 2012

Journal articles
Open Access
Effects of impregnation time on hardwood kraft pulp characteristics and papermaking potential â?¢ a mill study, TAPPI JOURNAL April 2010

Effects of impregnation time on hardwood kraft pulp characteristics and papermaking potential • a mill study, TAPPI JOURNAL April 2010

Inside this Section