A Tool for Simulating Energy Efficient Evaporation Using Excess Heat in Kraft Pulp Mills, 2007 Engineering, Pulping & Environmental Conference

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In this paper, we describe and illustrate the use of our simulation tool OptiVap, which has been used successfully in our research group in several papers. The tool uses Excel and the built-in Solver to find energy-efficient evaporation plants. The outputs from the tool are, for example, the live steam demand, the required heat transfer area and the investment cost. The tool can also simulate the consequences of integrating other process units with the evaporation plant. We can e.g. simulate the energy savings of using excess heat in the evaporation plant (process-integrated evaporation) and the evaporation consequences of separating lignin from the black liquor.