Integration of a cogeneration unit into a kraft pulping process |
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| Authors: | Behnam Mostajeran Goortani Enrique Mateos-Espejel Jean Paris |
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| Affiliation: | 1. Institute of Solar Research, German Aerospace Center, Karl-Heinz-Beckurts Straße 13, D-52428 Jülich, Germany;2. Institute of Solar Research, German Aerospace Center, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany;3. Institute of Solar Research, German Aerospace Center, Linder Höhe, D-51147 Köln, Germany;1. Department of Ecology and Natural Resource Management, Norwegian University of Life Science, Ås, Norway;2. METLA (Finnish Forest Research Institute), Vantaa, Finland;1. Department of Mechanical Engineering, College of Engineering and Technology, Biju Patnaik University of Technology, Bhubaneswar, India;2. KG Design Services Pvt. Ltd., Coimbatore, India;3. Department of Energy Science & Engineering, IIT Bombay, Mumbai, India |
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| Abstract: | The integration of cogeneration with other measures that impact the power production capacity in a Canadian Kraft pulping mill is studied. Those measures are removal of pressure reduction valves, adjustment of the steam pressure level, biomass boiler capacity, and reduction in process energy demand. CADSIM Plus software is used to simulate the cogeneration plant. The dynamic behavior of the process during start-up and its effect on electricity generation are also considered. It is shown that by replacing the PRVs with turbines, 14.4 MW of power can be generated. Moreover, by implementing cogeneration units and process measures to recover 23% of internal energy, 44.5 MW of electricity can be generated in addition to shutting down the existing bunker oil boiler. Therefore, implementation of cogeneration in the pulp and paper industry is technically possible and it offers significant economic advantages. A cost analysis of the complete project gives a simple payback time of less than a year. |
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