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System design aids 19 7

0.66 t/h
033 th

0,Ol th
0,99 th
1,34 th

233 t/h
I
1,67 t/h
Figure 4.1 9 Networkproposed by WaterTarget@ to achieve the target for example 1 after relaxing C1 for
P2 and P3

0,67 th
033 th
11'

1,33 th
Process
3
233
th,
Figure 4.20 Networkproposed by Water to achieve the target for example 1 after relaxing C1 for P2 and P3
iterative process. In the following paragraph an example is presented where it is
assumed these first steps to determine the maximum inlet and outlet
concentration have been fully examined.

4.2.5 Software tools currently available

As is already evident, application of water pinch methodology is simple for a
single-contaminant process scheme and/or only water usage is to be considered
without taking into account possible purification processes, discharge limits, or
costs linked to water management and purification. Pinch methodology was
originally developed as a research tool to help develop different scenarios for
minimising water consumption for industrial case studies. With the expansion of
water pinch as a design aid, commercial software packages have been developed.
Currently, there are at least four commercial software packages available:
WaterTargetm commercialised by Linnhoff March a division of KBC Process