Evaporator and Concentrator Design Considerations for Troubleshooting, 2008 Engineering, Pulping and Environmental Conference

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Design of kraft black liquor evaporation systems is primarily focused on achieving maximum system capability and overall performance. Black liquor flow rates vary to these systems and often include unplanned lower flow rate periods due to operating problems. When such periods occur it is critical to identify the problem location and quickly resolve it. Evaporation system designs that incorporate troubleshooting tools enable faster resolution of operating problems. The objective of this paper is to discuss design principles that facilitate rapid resolution of operating problems by taking into account both the tools used and the resources available. Industry examples are used to illustrate the significance of this approach. Continuous improvement of the operations staff is also supported with this approach by providing more insight and understanding into process interactions.