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International Heat Transfer Conference 15

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Heat Recovery in Difficult "Polluted Flue Gas Applications" in Waste to Energy Systems

Petr Stehlik
Institute of Process and Environmental Engineering, Brno University of Technology, Technická 2, 616 69 Brno, Czech Republic

Vojtech Turek
Brno University of Technology

Zdenek Jegla
Institute of Process and Environmental Engineering Faculty of Mechanical Engineering, Technical University of Brno, Czech Republic

Bohuslav Kilkovsky
Faculty of Mechanical Engineering, Brno University of Technology

DOI: 10.1615/IHTC15.ees.008948
pages 2159-2178

SCHLÜSSELWÖRTER: Heat exchanger, Energy and environmental systems, Fouling, Troubleshooting, Waste-to-Energy


A long-term experience and know-how from waste processing and especially from waste- and biomass-to-energy systems as well as continuing research and development brings new insights into manufacturing of equipment and their operation. Polluted flue gas (off-gas) causes high propensity to fouling and necessitates of subsequent cleaning. In some cases, it is not possible to utilize conventional approach. Novel designs of air pre-heaters, heat recovery steam generators and special heat exchangers therefore always respect primary importance of processes themselves as well as analyses aimed at selection and design of heat exchangers including specific features and fouling problems. However, the problems in operation cannot be avoided and therefore it is often necessary to use tailor-made solutions making provisions especially for fouling. We have been utilizing very efficient approach combining intuitive design and sophisticated tools based on Computational Fluid Dynamics (CFD). It is used for both troubleshooting and virtual prototyping and illustrated through industrial applications. Based on solving concrete industrial examples, a useful methodology which generalizes several particular features and takes into account economic aspects of different cases has been developed.

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