Redução de efluentes aquosos em processos quimicos : "pinch analysis" aplicada a processos de transferencia de massa

AUTOR(ES)
DATA DE PUBLICAÇÃO

1998

RESUMO

In this work, a new methodology for water-using process analysis is shown. The procedure is based on Pinch Analysis concepts. The method is based on the concept that contaminated water from one process may be used in other process if the minimum driving force for mass transfer for each contarninant is maintained. In the first stage, the rninimum freshwater consumption is predicted from the different characteristics of the water-using process, allowing for the identification of the rninimum wastewater amount to be treated. The minimum water use is read from the water composite curves, based on the water use profiles of each process. For single contaminant systems, the composite curve is given by the straight combination of the profiles, while for multiple-contarninant systems the profiles need to be shifted to satisfy composition constraints. A new algorithm and the related program were developed, based on the algorithm proposed by Wang and Smith (1994), that gives the minimum water consumption for single contaminant and multiple contaminant systems. Wang s algorithm was modified to allow the reduction of initially imposed restrictions. In the second stage, the minimum freshwater targeted is used to design the water flow network

ASSUNTO(S)

engenharia ambiental massa - transferencia agua - reutilização processos quimicos software de aplicação

ACESSO AO ARTIGO

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