Análise de distúrbios de compactação de cavacos de eucalipto em digestores contínuos fase vapor

• Autor(a) principal: Correia, Flávio Marcelo
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5900
• topic: Compactação de cavacos de eucalipto; Digestor contínuo; Vapor; Eucalyptus chip compaction; Continuous digesters; Steam; CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL::TECNOLOGIA E UTILIZACAO DE PRODUTOS FLORESTAIS::TECNOLOGIA DE CELULOSE E PAPEL

A major operation issue at the continuous digester operation (particularly in the vapor phase digesters) is the appropriate chip level control. This is a significant variable, concerning the association with the cooking retention time. If there are problems in the chip compaction bed, affecting chip level, the reaction time is out of control. Significant effects occurs on the production, quality and uniformity product as result. Published papers of several authors, have already demonstrated the relationships between the different process variables and their reactions to chemical kinetics, developing different models of cooking reactions. However, such models are applicable only to digester equilibrium conditions. There are several possible causes of chips compaction disturbances in the continuous digesters, and often it is difficult to identify and act on them immediately, considering the variables complexity (even if highly automated), and synergy between them. This study aimed to cluster in one variable the different key process information that affect Eucalyptus chip compaction disturbance in a vapor phase continuous digester, evaluate the interaction between them and their effects in chip bed retention disturbances. From results, expected to get a better understanding of chip bed packing , making it possible to optimize liquor and chip flow in the digester, by doing modifications in advance of the main manipulated alternatives, and thereby ensuring uniform fiber quality and production efficiency.