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Master's Dissertation
DOI
10.11606/D.18.2005.tde-17052006-105609
Document
Author
Full name
Ademir Gonçalves Albuquerque
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2005
Supervisor
Committee
Roma, Woodrow Nelson Lopes (President)
Coury, Jose Renato
Milioli, Fernando Eduardo
Title in Portuguese
Avaliação exergética dos efluentes do processo industrial do álcool
Keywords in Portuguese
álcool etílico
cana-de-açúcar
efluentes líquidos
exergia
sucroalcooleira
Abstract in Portuguese
A indústria sucroalcooleira tem na produção do álcool etílico carburante a captação de água em grande volume para geração de vapor, resfriamento e como parte do processo, sendo também geradora de grandes quantidades de efluentes. A indústria utilizando a energia proveniente da queima do bagaço nas caldeiras para transformação da água em vapor, gera sua própria eletricidade, e todo trabalho mecânico desenvolvido no processo. O grau de aproveitamento do vapor residual em trocadores de calor demonstra a eficiência da empresa. O balanço das massas que estão sendo transformadas neste processo, permite avaliar através da temperatura dos efluentes lançados, as perdas de exergia que podem ser minoradas. A ferramenta análise exergética (medida do grau de desequilíbrio energético entre uma substância e seu ambiente) empregada neste trabalho, mostra através de estudo de caso em duas usinas, como identificar, na avaliação dos efluentes lançados as perdas exergéticas em volumes de controle traçados no ciclo de produção do álcool, onde estão acontecendo as perdas e as possibilidades de melhorias que venham a corrigi-las
Title in English
Exergetic assessment of effluents in the industrial alcohol process
Keywords in English
ethylic alcohol
exergy
liquid effluents
sugar and alcohol
sugar cane
Abstract in English
In the production of ethyl alcohol as a fuel, the sugar and alcohol industry captures large volumes of water for steam generation, for cooling and as part of the process, generating large amounts of effluents. Using the energy produced by the burning of bagasse in the furnace for the transformation of water into steam, the industry generates its own electricity and the entire mechanical work developed in the process. The degree of utilization of residual steam in heat exchangers demonstrates the efficiency of the plant. The balance of the energies being transformed in this process shows, through the effluents launched, the losses that may be reduced. By means of case studies in two mills, the exergetic analysis tool (measurement of the degree of unbalance between the substance and its environment) employed in this study shows how to identify, in control volumes traced in the alcohol production cycle, where the losses are occurring and the possibilities of improvement that may eventually correct them
 
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01SUMARIO.pdf (80.43 Kbytes)
Publishing Date
2006-05-26
 
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