Development and Application of an Object-Oriented Simulation Tool for Kraft Recovery Processes, 2018 PEERS



A new software simulation tool for kraft recovery processes is presented, developed using IPSEpro, a commercial‐grade, object‐oriented modeling framework developed originally for power plant modeling. Using IPSEpro’s flexible structure and easy‐to‐use development environment, users can rapidly extend IPSEpro libraries to support new and existing technologies, and commercial‐grade libraries are available for many conventional and advanced energy and chemical conversion technologies. One such library is EPP_Lib, used for detailed design and off‐design analysis of power plants, including combined‐cycles, cogeneration systems, and steam cycles. With EPP_Lib, IPSEpro can design and analyze power plants at a level of scope and detail comparable with power plant software such as GateCycle and GTPro. 

Working with a leading pulp‐and‐paper company, Enginomix has extended EPP_Lib to support the modeling of kraft recovery processes, including brown stock wash processes, evaporator/concentrator trains, and kraft recovery boilers. Utilizing IPSEpro’s object‐oriented data structures, new streams and property routines were developed for solid, liquid, gaseous and mixed‐phased streams to represent black, green and white liquors, smelt, solid streams, and recovery boiler exhaust (gas with entrained solids). New icons were developed for key kraft recovery equipment, including recovery boilers, evaporators and concentrators, flash tanks, brown stock washers, pumps and heaters, ash mix tanks, and others. By utilizing existing EPP_Lib icons for conventional steam plants with these new library extensions, users can now build kraft recovery process models incorporating detailed industry‐standard calculations for both the kraft recovery and steam cycle processes. 

Sample IPSEpro models of various kraft recovery processes and configurations were developed and are presented. In the future, the EPP_P_Lib model library will be extended to support the modeling of recausticizing processes. In the next phase of the present work, a detailed representative model of the kraft recovery process will be developed for an operating U.S. pulp and paper facility, and the calculated model results will be compared with measured plant data; the comparison between the model results and measured plant data will be presented and discussed in a future paper.  

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Author: MIchael Erbes; Kevin Sapp; and Erhard Perz
Development and Application of an Object-Oriented Simulation
Development and Application of an Object-Oriented Simulation Tool for Kraft Recovery Processes, 2018 PEERS
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