PROCESS INTEGRATION OF PULP AND PAPER MILL BASED ON THE NEW PINCH TECHNOLOGY AND DYNAMIC SIMULATION FOR SAVING ENERGY

摘要

Optimization methods for process integration of industrial networks presented so far have dealt with grass-root situation. For retrofit ones, the actual design of the existing heat exchanger network must be taken into account. Bemtsson and Stromberg (1996) developed new Composite Curves for use in a targeting and options scanning in retrofitting. The aim of this development has been to create Pinch Technology based methods, with which the general problems with process integration in Retrofit can be treated. New Pinch Technology based curves for retrofitting of heat exchanger networks have provided a graphical representation of existing HEN, including heaters and utility levels, from which semi-quantitative conclusions can be drawn. The methodology involved a typical process study combined with process simulation and pinch analysis. Then two programs were developed, which if implemented would attain the simultaneous mill objectives of reduced steam usage during winter operation and reduced effluent temperature during summer operation. In this paper, two different models, new pinch technology and a dynamic process simulation are utilized and coordinated to find solutions in the analyzed energy system Pulp and paper processes, involve a great deal of heat transfer by mixing. For Dynamic simulation CADSIM Plus Code has been used.