The main causes of efficiency loss in thermal power plants are boiler tube failures that diminish unit reliability and availability, and raise the cost of the electric energy. For that reason, the regular examination of boiler tubes is indispensable measure for prevention of future malfunctions of power units. The microscopic examination of economizer's inner wall microstructure, the analysis of chemical composition of deposit using X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) have been performed in a subcritical power plant. Stress corrosion cracking, pitting corrosion, destroyed protective magnetite layer, presence of magnetite and hematite in deposit and corrosive impurities within the cracks have indicated the effect of inadequate quality of feedwater that cannot entirely ensure reliable operation of the boiler. It may be stated that maintenance of present boiler does not provide its reliable operation. The extensive chemical con...trol of water/steam cycle was recommended.
TY - JOUR
AU - Vidojković, Sonja
AU - Onjia, Antonije E.
AU - Devečerski, Aleksandar B.
AU - Grahovac, Nebojsa N
AU - Nastasović, Aleksandra
PY - 2014
UR - http://cer.ihtm.bg.ac.rs/handle/123456789/1474
AB - The main causes of efficiency loss in thermal power plants are boiler tube failures that diminish unit reliability and availability, and raise the cost of the electric energy. For that reason, the regular examination of boiler tubes is indispensable measure for prevention of future malfunctions of power units. The microscopic examination of economizer's inner wall microstructure, the analysis of chemical composition of deposit using X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) have been performed in a subcritical power plant. Stress corrosion cracking, pitting corrosion, destroyed protective magnetite layer, presence of magnetite and hematite in deposit and corrosive impurities within the cracks have indicated the effect of inadequate quality of feedwater that cannot entirely ensure reliable operation of the boiler. It may be stated that maintenance of present boiler does not provide its reliable operation. The extensive chemical control of water/steam cycle was recommended.
PB - Association of Chemical Engineers of Serbia
T2 - Hemijska industrija
T1 - Economizer water-wall damages initiated by feedwater impurities
VL - 68
IS - 5
SP - 559
EP - 563
DO - 10.2298/HEMIND130715082V
ER -
@article{
author = "Vidojković, Sonja and Onjia, Antonije E. and Devečerski, Aleksandar B. and Grahovac, Nebojsa N and Nastasović, Aleksandra",
year = "2014",
url = "http://cer.ihtm.bg.ac.rs/handle/123456789/1474",
abstract = "The main causes of efficiency loss in thermal power plants are boiler tube failures that diminish unit reliability and availability, and raise the cost of the electric energy. For that reason, the regular examination of boiler tubes is indispensable measure for prevention of future malfunctions of power units. The microscopic examination of economizer's inner wall microstructure, the analysis of chemical composition of deposit using X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) have been performed in a subcritical power plant. Stress corrosion cracking, pitting corrosion, destroyed protective magnetite layer, presence of magnetite and hematite in deposit and corrosive impurities within the cracks have indicated the effect of inadequate quality of feedwater that cannot entirely ensure reliable operation of the boiler. It may be stated that maintenance of present boiler does not provide its reliable operation. The extensive chemical control of water/steam cycle was recommended.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Economizer water-wall damages initiated by feedwater impurities",
volume = "68",
number = "5",
pages = "559-563",
doi = "10.2298/HEMIND130715082V"
}
Vidojković, S., Onjia, A. E., Devečerski, A. B., Grahovac, N. N.,& Nastasović, A. (2014). Economizer water-wall damages initiated by feedwater impurities.
Hemijska industrija
Association of Chemical Engineers of Serbia., 68(5), 559-563.
https://doi.org/10.2298/HEMIND130715082V
Vidojković S, Onjia AE, Devečerski AB, Grahovac NN, Nastasović A. Economizer water-wall damages initiated by feedwater impurities. Hemijska industrija. 2014;68(5):559-563
Vidojković Sonja, Onjia Antonije E., Devečerski Aleksandar B., Grahovac Nebojsa N, Nastasović Aleksandra, "Economizer water-wall damages initiated by feedwater impurities" Hemijska industrija, 68, no. 5 (2014):559-563,
https://doi.org/10.2298/HEMIND130715082V .
