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WinGEMS modelling and pinch analysis of a paper machine for utility reduction

Abstract
A multi-ply paper machine process model was developed using WinGEMS and the stream data produced was used to conduct a pinch analysis. The product stream was excluded from the analysis and the composite curves display the enthalpy contained only in the inputs and outputs to the various sections of the paper machine. The pinch point for the overall paper machine was 55.9 C while the minimum hot utility target was 170 MW. Occurrences of cross pinch heat transfer were identified and discussed. Heat recovery options for heating of the fresh water showers, using waste heat streams were investigated. Steam savings of over 14 MW could be achieved by recovering heat from two waste streams that currently go directly to drain with no heat recovery taking place. The use of pinch analysis for utilities targeting under non-continuous conditions was examined. Finally, the feasibility of integrating non-conventional technologies, such as heat storage, is discussed.
Type
Journal Article
Type of thesis
Series
Citation
Atkins, M., Morrison, A., Walmsley, M. & Riley, J. (2010). WinGEMS modelling and pinch analysis of a paper machine for utility reduction. Appita Journal, 63(4), 281-287.
Date
2010-09
Publisher
Appita
Degree
Supervisors
Rights
This article has been published in the journal: Appita Journal. Used with permission.