Elektrane (2025) [pp. 386-395]
AUTHOR(S) / АУТОР(И): Zoran Marković, Milić Erić, Predrag Stefanović, Aleksandar Milićević, Ivan Lazović, Rastko Jovanović, Nikola Živković
Download Full Pdf 
DOI: https://doi.org/10.46793/EEP25.386M
ABSTRACT / САЖЕТАК:
The electrostatic precipitator (ESP) of Unit B2 at TPP „Kostolac B“ was reconstructed in 2012 to comply with legal regulations on particulate matter (PM) emission limits. A few years later, annual reports on emission periodic measurements at Unit B2 showed that PM emissions exceeded the emission limit value (ELV) of 50 mg/Nm³. Since the ESP dedusting efficiency directly depends on the homogeneity of the velocity field in the ESP chamber, the aim of this work was to determine the achieved level of homogeneity of the flue gas velocities. Velocities were measured in the crosssections of the flue gas channel at the entrance to the ESP diffuser and in the vertical cross-sections of both ESP chambers in front of the first electric field. Based on the measured values, the homogeneity of the velocity field was assessed. Results of measurements of the velocity distribution indicated unsatisfactory uniformity of the velocity field, both in the channels and in the crosssections of the ESP chambers in front of the first dedusting zone, with the relative standard deviation of the measured velocities exceeding 50%. To address the insufficient uniformity of the velocity profile in the cross-section of the ESP chambers, a numerical CFD analysis of the flow in the channels and the ESP chamber was conducted. The results indicate that applying the directional loss model to represent the momentum source through an anisotropic porous region of distribution grates, formed by a series of perforated plates, can produce confusing and unrealistic outcomes.
KEYWORDS / КЉУЧНЕ РЕЧИ:
on site measurements, electrostatic precipitator reconstruction, CFD
ACKNOWLEDGEMENT / ПРОЈЕКАТ:
The research was funded by the Ministry of Science, Technological Development and Innovation of the Republic of Serbia (Contract Annex: 451-03-136/2025-03/200017). The authors are very grateful for the support of this work by the Joint Stock Company ‘’Elektroprivreda Srbije’’.
REFERENCES / ЛИТЕРАТУРA:
- Stefanović, P., Erić, M., Marković, Z., Spasojević, V., Report on Periodic Measurement of Emissions of Harmful and Hazardous Substances into the Air at Unit B2 of the Thermal Power Plant „Kostolac“ in Kostolac, Report No. NIV-LTE-593, Institute for Nuclear Sciences „Vinča“, Laboratory for Thermal Engineering and Energy, dec. 2015, Vinča-Belgrade, Serbia (in Serbian)
- Stefanović, P., Erić, M., Marković, Z., Spasojević, V., Report on Periodic Measurement of Emissions of Pollutants into the Air at Unit B2 of the Thermal Power Plant “Kostolac“ in Kostolac, Report No. NIV-LTE-600, Institute for Nuclear Sciences „Vinča“, Laboratory for Thermal Engineering and Energy, june 2016, Vinča-Belgrade, Serbia (in Serbian)
- Stefanović, P., Erić, M., Marković, Z., Spasojević, V., Report on Periodic Measurement of Emissions of Pollutants Into the Air at Unit B1 of the Thermal Power Plant „Kostolac“ Drmno – Kostolac, Report No. NIV-LTE-604, Institute for Nuclear Sciences „Vinča“, Laboratory for Thermal Engineering and Energy, dec. 2016, Vinča-Belgrade, Serbia (in Serbian)
- Popa, G.N.; Dinis, , C.M.; Iagar, A. Investigations on Three-Section Plate-Type Electrostatic Precipitators Used in Thermoelectric Power Plants, Energies, 16, (2023), pp. 1186, https://doi.org/10.3390/en16031186
- Kılıç, M.; Mutlu, M.; Altun, A.F. Numerical simulation and analytical evaluation of the collection efficiency of the particles in a gas by the wire-plate electrostatic precipitators, Sci., 12(13), (2022), pp. 6401, https://doi.org/10.3390/app12136401
- Bäck, A., Relation Between Gas Velocity Profile and Apparent Migration Velocity in Electrostatic Precipitators, International Journal of Plasma Environmental Science & Technology, Vol.11, No.1, (2017), pp. 104-111
- Zhou, J., et al., Energy and momentum correction coefficients within contraction zone in openchannel combining flows, Water Science and Engineering, 14(4), (2021), pp. 337-344
- Stefanović, P., Stevanović, I., Erić, M., Marković, Z., Special tests at the boiler plant in TPP KOSTOLAC-B (Study: Analysis of the condition and possibilities for increasing the efficiency of the electrostatic precipitator on unit B2 in TPP „KOSTOLAC B“), ver. 1.0, Report No. NIV-LTE-650, Institute for Nuclear Sciences „Vinča“, Laboratory for Thermal Engineering and Energy, june. 2019, Vinča-Belgrade, Serbia (in Serbian)