EPP_P_Lib: An Object-Oriented IPSEpro Library for Modeling Kraft Recovery Processes

摘要

Enginomix is presenting a new process simulation tool for modeling kraft recovery processes. This tool has been developed using IPSEpro, a commercial-grade, object-oriented modeling framework originally developed 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 EPPLib, IPSEpro can design and analyze power plants at a level of scope and detail comparable with power plant software packages such as GateCycle and GTPro. Working with a leading pulp-and-paper company, Enginomix has developed EPP_P_lib, an extended version of EPP_Lib that supports the modeling of kraft recovery processes, including brown stock washing, 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. Representative IPSEpro/EPP_P_Lib models for kraft recovery processes are presented, incorporating the brown stock wash system, evaporator/concentrator train, recovery boiler and complete steam system.