Air staging application effects on overall steam boiler operation
Апстракт
This paper presents the results of calculation system of main processes in power steam boiler, before and after application of air staging. Modified air injection scheme was implemented during 2015 on the power steam boiler within unit 1 of TPP Kostolac B. Measurements performed on site showed that applied reconstruction led to a permanent loss of the steam boiler power. This study was performed in order to define the cause of such an occurrence and to consider the possibility for regaining the designed steam parameters along with keeping NOx concentration in prescribed limits. This paper discusses the influence of repositioning the air injection location on processes within the furnace. Furthermore, the influence of the redistribution of injected air-flow along the furnace height on important boiler operation parameters has been analyzed. Analysis showed that, with appropriate dosing of air along the height of the existing furnace, it is possible to achieve the optimum of the boiler's... operation parameters. Results of research showed that air staging throughout the furnace height in best test case additionally reduces NO concentration (195-225 mg/Nm(3)) and increases the power of x considered boiler (828.8-751.1 MW) with an insignificant decrease of the boiler's efficiency (86.27-86.77%). Furthermore, the designed temperatures of superheated (540-498 degrees C) and reheated (540-518 degrees C) steam have been reached again, whereby the safety of the boiler's operation has been significantly increased. Results of this study improve the present explanation of the processes occurred in the furnace with applied primary measures. They also give directions on defining the most influential parameters on considered processes with the final purpose to increase the efficiency and availability of the entire plant.
Кључне речи:
sub-stoichiometric / power steam boiler / NOx / air stagingИзвор:
Thermal Science, 2019, 23, S1559-S1574Издавач:
- Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
Финансирање / пројекти:
- Повећање енергетске и еколошке ефикасности процеса у ложишту за угљени прах и оптимизација излазне грејне површине енергетског парног котла применом сопствених софтверских алата (RS-MESTD-Technological Development (TD or TR)-33018)
- Electric Power Industry of Serbia
DOI: 10.2298/TSCI180413286S
ISSN: 0354-9836
WoS: 000509489400014
Scopus: 2-s2.0-85084032171
Институција/група
Inovacioni centarTY - JOUR AU - Stupar, Goran AU - Tucaković, Dragan AU - Živanović, Titoslav AU - Belošević, Srđan V. AU - Crnomarković, Nenad PY - 2019 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3231 AB - This paper presents the results of calculation system of main processes in power steam boiler, before and after application of air staging. Modified air injection scheme was implemented during 2015 on the power steam boiler within unit 1 of TPP Kostolac B. Measurements performed on site showed that applied reconstruction led to a permanent loss of the steam boiler power. This study was performed in order to define the cause of such an occurrence and to consider the possibility for regaining the designed steam parameters along with keeping NOx concentration in prescribed limits. This paper discusses the influence of repositioning the air injection location on processes within the furnace. Furthermore, the influence of the redistribution of injected air-flow along the furnace height on important boiler operation parameters has been analyzed. Analysis showed that, with appropriate dosing of air along the height of the existing furnace, it is possible to achieve the optimum of the boiler's operation parameters. Results of research showed that air staging throughout the furnace height in best test case additionally reduces NO concentration (195-225 mg/Nm(3)) and increases the power of x considered boiler (828.8-751.1 MW) with an insignificant decrease of the boiler's efficiency (86.27-86.77%). Furthermore, the designed temperatures of superheated (540-498 degrees C) and reheated (540-518 degrees C) steam have been reached again, whereby the safety of the boiler's operation has been significantly increased. Results of this study improve the present explanation of the processes occurred in the furnace with applied primary measures. They also give directions on defining the most influential parameters on considered processes with the final purpose to increase the efficiency and availability of the entire plant. PB - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd T2 - Thermal Science T1 - Air staging application effects on overall steam boiler operation EP - S1574 SP - S1559 VL - 23 DO - 10.2298/TSCI180413286S ER -
@article{ author = "Stupar, Goran and Tucaković, Dragan and Živanović, Titoslav and Belošević, Srđan V. and Crnomarković, Nenad", year = "2019", abstract = "This paper presents the results of calculation system of main processes in power steam boiler, before and after application of air staging. Modified air injection scheme was implemented during 2015 on the power steam boiler within unit 1 of TPP Kostolac B. Measurements performed on site showed that applied reconstruction led to a permanent loss of the steam boiler power. This study was performed in order to define the cause of such an occurrence and to consider the possibility for regaining the designed steam parameters along with keeping NOx concentration in prescribed limits. This paper discusses the influence of repositioning the air injection location on processes within the furnace. Furthermore, the influence of the redistribution of injected air-flow along the furnace height on important boiler operation parameters has been analyzed. Analysis showed that, with appropriate dosing of air along the height of the existing furnace, it is possible to achieve the optimum of the boiler's operation parameters. Results of research showed that air staging throughout the furnace height in best test case additionally reduces NO concentration (195-225 mg/Nm(3)) and increases the power of x considered boiler (828.8-751.1 MW) with an insignificant decrease of the boiler's efficiency (86.27-86.77%). Furthermore, the designed temperatures of superheated (540-498 degrees C) and reheated (540-518 degrees C) steam have been reached again, whereby the safety of the boiler's operation has been significantly increased. Results of this study improve the present explanation of the processes occurred in the furnace with applied primary measures. They also give directions on defining the most influential parameters on considered processes with the final purpose to increase the efficiency and availability of the entire plant.", publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd", journal = "Thermal Science", title = "Air staging application effects on overall steam boiler operation", pages = "S1574-S1559", volume = "23", doi = "10.2298/TSCI180413286S" }
Stupar, G., Tucaković, D., Živanović, T., Belošević, S. V.,& Crnomarković, N.. (2019). Air staging application effects on overall steam boiler operation. in Thermal Science Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 23, S1559-S1574. https://doi.org/10.2298/TSCI180413286S
Stupar G, Tucaković D, Živanović T, Belošević SV, Crnomarković N. Air staging application effects on overall steam boiler operation. in Thermal Science. 2019;23:S1559-S1574. doi:10.2298/TSCI180413286S .
Stupar, Goran, Tucaković, Dragan, Živanović, Titoslav, Belošević, Srđan V., Crnomarković, Nenad, "Air staging application effects on overall steam boiler operation" in Thermal Science, 23 (2019):S1559-S1574, https://doi.org/10.2298/TSCI180413286S . .