Exergy analysis of a multistage evaporation system for black liquor concentration
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Research, Society and Development |
Texto Completo: | https://rsdjournal.org/index.php/rsd/article/view/22835 |
Resumo: | The pulp and paper industries in Brazil are large consumers of energy, offering an ideal region for the development of eucalyptus forests. The Kraft process is the most used in the country as it is capable of reusing chemical products, with black liquor being one of the by-products, a complex substance with organic and inorganic composition. To obtain economic and environmental viability, the inorganic portion must be reacquired in a recovery plant to be reused, with the plant having a multi-stage evaporation system, responsible for concentrating the liquor to be burned in the recovery boiler. In light of the above, the objective of this work was the development and validation of a phenomenological mathematical model that would represent the multistage evaporation system, to carry out a study of inlet temperature and pressure that would bring the best results in terms of steam savings, exergetic efficiency, exergy destruction and black liquor solids content. Thus, the best inlet conditions and evaporators that have higher exergy destruction rates were found. For this, the model was built based on related research works, using mass, energy and phase balance balances, as well as satisfactorily portraying the results found by the reference author, obtaining the largest deviation of 0.2%. This work allowed an advance in the understanding of the phenomena involved and the optimization of this process, aiming at an improvement in the energy consumption of the environment. |
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Exergy analysis of a multistage evaporation system for black liquor concentrationAnálisis de exergía de un sistema de evaporación multietapa para la concentración de licor negroAnálise exergética de um sistema de evaporação de múltiplos estágios para a concentração de licor negroLicor negroEvaporaçãoExergiaTermodinâmicaEficiência.Licor negroEvaporaciónExergíaTermodinámicaEficiencia.Black liquorEvaporationExergyThermodynamicsEfficiency.The pulp and paper industries in Brazil are large consumers of energy, offering an ideal region for the development of eucalyptus forests. The Kraft process is the most used in the country as it is capable of reusing chemical products, with black liquor being one of the by-products, a complex substance with organic and inorganic composition. To obtain economic and environmental viability, the inorganic portion must be reacquired in a recovery plant to be reused, with the plant having a multi-stage evaporation system, responsible for concentrating the liquor to be burned in the recovery boiler. In light of the above, the objective of this work was the development and validation of a phenomenological mathematical model that would represent the multistage evaporation system, to carry out a study of inlet temperature and pressure that would bring the best results in terms of steam savings, exergetic efficiency, exergy destruction and black liquor solids content. Thus, the best inlet conditions and evaporators that have higher exergy destruction rates were found. For this, the model was built based on related research works, using mass, energy and phase balance balances, as well as satisfactorily portraying the results found by the reference author, obtaining the largest deviation of 0.2%. This work allowed an advance in the understanding of the phenomena involved and the optimization of this process, aiming at an improvement in the energy consumption of the environment.Las industrias de celulosa y papel en Brasil son grandes consumidoras de energía, ofreciendo una región ideal para el desarrollo de los bosques de eucaliptos. El proceso Kraft es el muy utilizado en el país ya que es capaz de reutilizar productos químicos, siendo uno de los subproductos el licor negro, sustancia compleja de composición orgánica e inorgánica. Para obtener viabilidad económica y ambiental, la porción inorgánica debe ser readquirida en una planta de recuperación para ser reutilizada, disponiendo la planta de un sistema de evaporación multietapa, responsable de concentrar el licor a quemar en la caldera de recuperación. A la luz de lo anterior, el objetivo de este trabajo fue el desarrollo y validación de un modelo matemático fenomenológico que representaría el sistema de evaporación multietapa, para realizar un estudio de temperatura y presión de entrada que arrojara los mejores resultados en términos de ahorro de vapor, eficiencia, exergética, destrucción de exergía y contenido de sólidos de licor negro. Por lo tanto, se encontraron las mejores condiciones de entrada y evaporadores que tienen mayores tasas de destrucción de exergía. Para ello, el modelo se construyó a partir de trabajos de investigación relacionados, utilizando balances de masa, energía y balance de fases, además de retratar satisfactoriamente los resultados encontrados por el autor de referencia, obteniendo la mayor desviación del 0,2%. Este trabajo permitió avanzar en la comprensión de los fenómenos involucrados y la optimización de este proceso, con el objetivo de mejorar el consumo energético del medio ambiente.As indústrias de papel e celulose, no Brasil, são grandes consumidoras de energia, dispondo de uma região ideal para o desenvolvimento de florestas do eucalipto. O processo Kraft é o mais empregado no país por ser capaz de reutilizar os produtos químicos, sendo o licor negro um dos subprodutos, substância complexa com composição orgânica e inorgânica. Para obter viabilidade econômica e ambiental, a parcela inorgânica deve ser readquirida em uma planta de recuperação para ser reutilizada, com a planta dispondo de um sistema de evaporação de múltiplos estágios, responsável por concentrar o licor para ser queimado na caldeira de recuperação. Em face do exposto, o objetivo desse trabalho foi o desenvolvimento e validação de um modelo matemático fenomenológico que representasse o sistema de evaporação de múltiplos estágios, para realizar um estudo de temperatura e pressão de entrada que trouxessem os melhores resultados de economia de vapor, eficiência exergética, destruição de exergia e de teor de sólidos do licor negro. Dessa forma, foram encontrados as melhores condições de entrada e os evaporadores que detêm maiores taxas de destruição de exergia. Para isso, o modelo foi construído baseado nos trabalhos de pesquisa afim, utilizando balanços de massa, energia e equilíbrio de fases, assim como retratou satisfatoriamente os resultados encontrados pelo autor de referência, obtendo-se o maior desvio de 0,2%. Este trabalho possibilitou um avanço na compreensão dos fenômenos envolvidos e a otimização desse processo, visando uma melhoria no consumo energético do meio.Research, Society and Development2021-11-24info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/2283510.33448/rsd-v10i15.22835Research, Society and Development; Vol. 10 No. 15; e221101522835Research, Society and Development; Vol. 10 Núm. 15; e221101522835Research, Society and Development; v. 10 n. 15; e2211015228352525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIporhttps://rsdjournal.org/index.php/rsd/article/view/22835/20253Copyright (c) 2021 Lucas Nunes Rodrigues; Luiz Felipe Rodrigues Silva; Matheus de Sousa Borges; Karine Matos Sousa; Francisco Valdivino Rocha Lima; Anderson Felipe Chaves Forteshttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessRodrigues, Lucas NunesSilva, Luiz Felipe RodriguesBorges, Matheus de SousaSousa, Karine MatosLima, Francisco Valdivino RochaFortes, Anderson Felipe Chaves2021-12-06T10:13:53Zoai:ojs.pkp.sfu.ca:article/22835Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:41:53.040479Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false |
dc.title.none.fl_str_mv |
Exergy analysis of a multistage evaporation system for black liquor concentration Análisis de exergía de un sistema de evaporación multietapa para la concentración de licor negro Análise exergética de um sistema de evaporação de múltiplos estágios para a concentração de licor negro |
title |
Exergy analysis of a multistage evaporation system for black liquor concentration |
spellingShingle |
Exergy analysis of a multistage evaporation system for black liquor concentration Rodrigues, Lucas Nunes Licor negro Evaporação Exergia Termodinâmica Eficiência. Licor negro Evaporación Exergía Termodinámica Eficiencia. Black liquor Evaporation Exergy Thermodynamics Efficiency. |
title_short |
Exergy analysis of a multistage evaporation system for black liquor concentration |
title_full |
Exergy analysis of a multistage evaporation system for black liquor concentration |
title_fullStr |
Exergy analysis of a multistage evaporation system for black liquor concentration |
title_full_unstemmed |
Exergy analysis of a multistage evaporation system for black liquor concentration |
title_sort |
Exergy analysis of a multistage evaporation system for black liquor concentration |
author |
Rodrigues, Lucas Nunes |
author_facet |
Rodrigues, Lucas Nunes Silva, Luiz Felipe Rodrigues Borges, Matheus de Sousa Sousa, Karine Matos Lima, Francisco Valdivino Rocha Fortes, Anderson Felipe Chaves |
author_role |
author |
author2 |
Silva, Luiz Felipe Rodrigues Borges, Matheus de Sousa Sousa, Karine Matos Lima, Francisco Valdivino Rocha Fortes, Anderson Felipe Chaves |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Rodrigues, Lucas Nunes Silva, Luiz Felipe Rodrigues Borges, Matheus de Sousa Sousa, Karine Matos Lima, Francisco Valdivino Rocha Fortes, Anderson Felipe Chaves |
dc.subject.por.fl_str_mv |
Licor negro Evaporação Exergia Termodinâmica Eficiência. Licor negro Evaporación Exergía Termodinámica Eficiencia. Black liquor Evaporation Exergy Thermodynamics Efficiency. |
topic |
Licor negro Evaporação Exergia Termodinâmica Eficiência. Licor negro Evaporación Exergía Termodinámica Eficiencia. Black liquor Evaporation Exergy Thermodynamics Efficiency. |
description |
The pulp and paper industries in Brazil are large consumers of energy, offering an ideal region for the development of eucalyptus forests. The Kraft process is the most used in the country as it is capable of reusing chemical products, with black liquor being one of the by-products, a complex substance with organic and inorganic composition. To obtain economic and environmental viability, the inorganic portion must be reacquired in a recovery plant to be reused, with the plant having a multi-stage evaporation system, responsible for concentrating the liquor to be burned in the recovery boiler. In light of the above, the objective of this work was the development and validation of a phenomenological mathematical model that would represent the multistage evaporation system, to carry out a study of inlet temperature and pressure that would bring the best results in terms of steam savings, exergetic efficiency, exergy destruction and black liquor solids content. Thus, the best inlet conditions and evaporators that have higher exergy destruction rates were found. For this, the model was built based on related research works, using mass, energy and phase balance balances, as well as satisfactorily portraying the results found by the reference author, obtaining the largest deviation of 0.2%. This work allowed an advance in the understanding of the phenomena involved and the optimization of this process, aiming at an improvement in the energy consumption of the environment. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-11-24 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/22835 10.33448/rsd-v10i15.22835 |
url |
https://rsdjournal.org/index.php/rsd/article/view/22835 |
identifier_str_mv |
10.33448/rsd-v10i15.22835 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/22835/20253 |
dc.rights.driver.fl_str_mv |
https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Research, Society and Development |
publisher.none.fl_str_mv |
Research, Society and Development |
dc.source.none.fl_str_mv |
Research, Society and Development; Vol. 10 No. 15; e221101522835 Research, Society and Development; Vol. 10 Núm. 15; e221101522835 Research, Society and Development; v. 10 n. 15; e221101522835 2525-3409 reponame:Research, Society and Development instname:Universidade Federal de Itajubá (UNIFEI) instacron:UNIFEI |
instname_str |
Universidade Federal de Itajubá (UNIFEI) |
instacron_str |
UNIFEI |
institution |
UNIFEI |
reponame_str |
Research, Society and Development |
collection |
Research, Society and Development |
repository.name.fl_str_mv |
Research, Society and Development - Universidade Federal de Itajubá (UNIFEI) |
repository.mail.fl_str_mv |
rsd.articles@gmail.com |
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1797052695945674752 |