Hybrid techology of flue gas denitrification system. Part 1—Preliminary studies of flow turbulence and pressure drop in the elements of rotary air heater baskets

  • Andrzej Michal Kwiczala SBB ENERGY S.A.
  • Robert Andrzej Wejkowski Silesian University of Technology
  • Katarzyna Jagodzińska Silesian University of Technology
  • Dominika Bandoła SBB Energy SA


The paper presents the results of physical and numerical tests of fluid flow through the filling of a rotary air heater (RAH). Alaboratory-scale test bench was used to measure flow resistance across a fragment of a RAH. Seven types of RAH moduleswere tested - one steel and six ceramic (as catalyst carriers). The relationship between pressure drop and velocity (Renumber) of flow was used to deduce the flow characteristics for each of the RAH modules tested.Measurements carried out on the test bench were used to create a substitute mathematical model, which in the CFD codeAnsys Fluent enables accurate mapping of pressure drop and velocity distribution full fit to the real flow conditions.Numerical calculations were used to validate measurements for an alternative model, to create guidelines for the substitutemodel of the porous zone and to optimize application checking the correctness of created guidelines for simplified calculations.Flow simulations were performed for various turbulence models. Results were compared to the test-bench measurements todetermine the best adjustment for this specific type of reverse flow inside the air duct.This research is part of an ongoing research project: “Hybrid Technology of Flue Gas Denitrification System in Steam andHot Water Boilers”. The aim of the project is to investigate the concept of using rotary air heater fillings as a carrier for catalyticcoatings to reduce nitrogen oxides. In the further part of the research project, the replacement porous zone substitute modelswill make it possible to precisely calculate the entire RAH and will significantly reduce the calculation time as the basis forfurther project work.

Author Biographies

Andrzej Michal Kwiczala, SBB ENERGY S.A.
Silesian University of Technology, PhD student
Robert Andrzej Wejkowski, Silesian University of Technology
Institute of Power Engineering and Turbomachinery, PhD
Katarzyna Jagodzińska, Silesian University of Technology
PhD student
Dominika Bandoła, SBB Energy SA
PhD student


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How to Cite
KWICZALA, Andrzej Michal et al. Hybrid techology of flue gas denitrification system. Part 1—Preliminary studies of flow turbulence and pressure drop in the elements of rotary air heater baskets. Journal of Power Technologies, [S.l.], v. 99, n. 2, p. 98–103, apr. 2019. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/1479>. Date accessed: 05 aug. 2021.
Contemporary Problems of Thermal Engineering 2018 Gliwice


Hybrid DeNOx System, turbulence models, backward facing step, rotary air heater, CFD

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