1 A COMPARATIVE STUDY BETWEEN THE USE OF REBOILERS AND DIRECT STEAM INJECTION IN DISTILLATION COLUMNS

1 A COMPARATIVE STUDY BETWEEN THE USE OF REBOILERS AND DIRECT STEAM INJECTION IN DISTILLATION COLUMNS

SILVA, R. O. da; DEFENDI, R. O.; JORGE, L. M. M.; TISKI, V. C.; LIMA, O. C. Motta

Artigo:

Ethanol can be obtained by the distillation process. Once there are doubts about the advantages and disadvantages of direct and indirect heating, the aim of this work was to compare three alcohol distillation column projects, using direct steam injection, partial and total reboiler to heat the column. Results based on the case studied showed it is possible to have a stillage quantity reduction of almost 17% and 1.8% of the steam with the use of partial or total reboiler. Based on the quantity of steam decrease observed, it was possible to estimate the payback time of approximately two years for both types of reboilers. Therefore, the partial reboiler proved to be more viable than the total one, since it promotes a separation stage, which can increase the column efficiency and also there is a lower cost than the total reboiler in areas larger than 11,118.57ft². It can be stated, in both financial and environmental aspects, that it is advantageous to carry out the replacement of direct steam injection with use of reboiler.

Ethanol can be obtained by the distillation process. Once there are doubts about the advantages and disadvantages of direct and indirect heating, the aim of this work was to compare three alcohol distillation column projects, using direct steam injection, partial and total reboiler to heat the column. Results based on the case studied showed it is possible to have a stillage quantity reduction of almost 17% and 1.8% of the steam with the use of partial or total reboiler. Based on the quantity of steam decrease observed, it was possible to estimate the payback time of approximately two years for both types of reboilers. Therefore, the partial reboiler proved to be more viable than the total one, since it promotes a separation stage, which can increase the column efficiency and also there is a lower cost than the total reboiler in areas larger than 11,118.57ft². It can be stated, in both financial and environmental aspects, that it is advantageous to carry out the replacement of direct steam injection with use of reboiler.

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DOI: 10.5151/chemeng-cobeq2014-1675-18110-178913

Referências bibliográficas

• [1] CONAB. Acompanhamento de safra brasileira : cana-de-açúcar, segundo levantamento, agosto/2013 - Companhia Nacional de Abastecimento. – Brasília : Conab 2013., p. 10.
• [2] Andlt;http://www.conab.gov.br/conteudos.php?a=1253Andamp;t=2Andgt; (acessed 23.09.13). COPPETI, J.B. Coeficiente global de transferência de calor. Unisinos. Andlt;http://professor.unisinos.br/jcopetti/sistermAndgt; (acessed 14.09.13). CRUZ, J.I., Portugal, R.S., Lucendo, M.C., Elis, V.R., Fachini, S.J.S., Ustra, A.T. Andamp; Borges, W.R. (2008). Detecção de contaminação de solo por vinhaça através de análise de dados de eletrorrestividade. Revista Brasileira de Geofísica 26, p. 481-492.
• [3] DIAS, M.O.S.; MODESTO, M.; ENSINAS, A.V.; NEBRA, S.A.; FILHO, R.M. Andamp; ROSSEL, C.E.V. (2010). Improving bioethanol production from sugarcane: evaluation of distillation, thermal integration and cogeneration systems. Energy 36, p. 3691-3703.
• [4] ENSINAS, A.V.; MODESTO, M.; NEBRA, S.A. Andamp; SERRA, L. (2009) . Reduction of irreversibility generation in sugar and ethanol production from sugarcane. Energy 34, p. 680–688.
• [5] EVARISTO, K.S. Andamp; FIGUEIREDO, R.S. (2008). Custo do vapor na agroindústria. Dissertação (Mestrado). Universidade Federal de Goiás. JORGE, L.M.M.; RIGHETTO, A.R.; POLLI, P.A.; SANTOS, O.A.A. Andamp; FILHO, R.M. (2010). Simulation and analysis of a sugarcane juice evaporation system. Journal of Food Engineering 99, p. 351-359.
• [6] KERN, D. Q. (1982). Processos de transmissão de calor. Rio de Janeiro: Editora Guanabara Dois. p. 127-151.
• [7] MARQUINI, M.F.; MARIANI, D.C.; MEIRELLES, A.J.A.; SANTOS, O.A.A.S. Andamp; JORGE, L.M.M. (2007). Análise de um sistema industrial de colunas de destilação. Acta Science Technology 29, p. 23-28.
• [8] MCCABE, W.L. (2001). Unit operations of chemical engineering. 6th ed. p. 641-651.
• [9] MILLIGAN, D.A. Matche. Disponível em: Andlt; http://matche.comAndgt;. (acessed 15.09.13). SILVA, M.A.S., GRIEBELER, N.P. Andamp; BORGES, L.C. (2007). Uso de vinhaça e impactos nas propriedades do solo e lençol freático. Revista Brasileira de Engenharia Agrícola e Ambiental. p. 108-114.

Como citar:

SILVA, R. O. da; DEFENDI, R. O.; JORGE, L. M. M.; TISKI, V. C.; LIMA, O. C. Motta; "1 A COMPARATIVE STUDY BETWEEN THE USE OF REBOILERS AND DIRECT STEAM INJECTION IN DISTILLATION COLUMNS", p-15942-15948. In: Anais do XX Congresso Brasileiro de Engenharia Química - COBEQ 2014 [= Blucher Chemical Engineering Proceedings, v.1, n.2]. São Paulo: Blucher, 2015.
ISSN 23591757, DOI 10.5151/chemeng-cobeq2014-1675-18110-178913