Numerical modeling of in-furnace sulfur removal by sorbent injection during pulverized lignite combustion
Само за регистроване кориснике
2019
Аутори
Tomanović, IvanBelošević, Srđan V.
Crnomarković, Nenad
Milicević, Aleksandar
Tucaković, Dragan
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Results of the study on SO2 reduction in a utility boiler furnace by means of furnace sorbent injection are presented in this paper with analysis of major influential parameters. The Ca-based sorbent injection process in pulverized lignite fired boiler furnace with tangentially arranged burners is simulated. In simulations sorbent particles are distributed among the burner tiers, where they are injected together with coal, and also through sorbent injection ports located above the burners. The sorbent reactions model was adapted to be efficiently implemented in the code for CFD simulations of complex processes considering both the calculation time and the results accuracy. The sorbent particles reaction model was simplified with several assumptions to allow for faster calculations and significantly reduce simulation time without loss in calculation precision during the particle tracking in boiler furnace. Two phase gas-particle flow is modeled, with coal and sorbent particles reactions... and interactions with gaseous phase. Test-cases based on fuels with different composition and combustion organization were simulated in details, and results showed that significant increase in reduction of SO2 at furnace exit could be achieved by proper sorbent injection. The sorbent injection locations were analyzed with special care to enable maximum SO2 capture in the case-study furnace under investigated conditions. Most of the test-cases with low SO2 capture had one or more of the following problems: intensive particle sintering, low local temperatures (leading to low calcination rates), or bad particles distribution. Significant SO2 retention was possible when the process was organized in such a way that particles were exposed to optimal temperature range, and injected in the furnace zones with high SO2 concentration simultaneously. It was shown that better results can be achieved by injection of sorbent through multiple burner tiers, with SO2 emission reduction efficiency around 60% at the furnace exit in several well optimized test-cases.
Кључне речи:
SO2 emission reduction / Pulverized coal combustion / Numerical model / Furnace sorbent injection / Ca-based sorbentИзвор:
International Journal of Heat and Mass Transfer, 2019, 128, 98-114Издавач:
- Pergamon-Elsevier Science Ltd, Oxford
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)
DOI: 10.1016/j.ijheatmasstransfer.2018.08.129
ISSN: 0017-9310
WoS: 000449445600009
Scopus: 2-s2.0-85052729002
Колекције
Институција/група
Mašinski fakultetTY - JOUR AU - Tomanović, Ivan AU - Belošević, Srđan V. AU - Crnomarković, Nenad AU - Milicević, Aleksandar AU - Tucaković, Dragan PY - 2019 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3232 AB - Results of the study on SO2 reduction in a utility boiler furnace by means of furnace sorbent injection are presented in this paper with analysis of major influential parameters. The Ca-based sorbent injection process in pulverized lignite fired boiler furnace with tangentially arranged burners is simulated. In simulations sorbent particles are distributed among the burner tiers, where they are injected together with coal, and also through sorbent injection ports located above the burners. The sorbent reactions model was adapted to be efficiently implemented in the code for CFD simulations of complex processes considering both the calculation time and the results accuracy. The sorbent particles reaction model was simplified with several assumptions to allow for faster calculations and significantly reduce simulation time without loss in calculation precision during the particle tracking in boiler furnace. Two phase gas-particle flow is modeled, with coal and sorbent particles reactions and interactions with gaseous phase. Test-cases based on fuels with different composition and combustion organization were simulated in details, and results showed that significant increase in reduction of SO2 at furnace exit could be achieved by proper sorbent injection. The sorbent injection locations were analyzed with special care to enable maximum SO2 capture in the case-study furnace under investigated conditions. Most of the test-cases with low SO2 capture had one or more of the following problems: intensive particle sintering, low local temperatures (leading to low calcination rates), or bad particles distribution. Significant SO2 retention was possible when the process was organized in such a way that particles were exposed to optimal temperature range, and injected in the furnace zones with high SO2 concentration simultaneously. It was shown that better results can be achieved by injection of sorbent through multiple burner tiers, with SO2 emission reduction efficiency around 60% at the furnace exit in several well optimized test-cases. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - International Journal of Heat and Mass Transfer T1 - Numerical modeling of in-furnace sulfur removal by sorbent injection during pulverized lignite combustion EP - 114 SP - 98 VL - 128 DO - 10.1016/j.ijheatmasstransfer.2018.08.129 ER -
@article{ author = "Tomanović, Ivan and Belošević, Srđan V. and Crnomarković, Nenad and Milicević, Aleksandar and Tucaković, Dragan", year = "2019", abstract = "Results of the study on SO2 reduction in a utility boiler furnace by means of furnace sorbent injection are presented in this paper with analysis of major influential parameters. The Ca-based sorbent injection process in pulverized lignite fired boiler furnace with tangentially arranged burners is simulated. In simulations sorbent particles are distributed among the burner tiers, where they are injected together with coal, and also through sorbent injection ports located above the burners. The sorbent reactions model was adapted to be efficiently implemented in the code for CFD simulations of complex processes considering both the calculation time and the results accuracy. The sorbent particles reaction model was simplified with several assumptions to allow for faster calculations and significantly reduce simulation time without loss in calculation precision during the particle tracking in boiler furnace. Two phase gas-particle flow is modeled, with coal and sorbent particles reactions and interactions with gaseous phase. Test-cases based on fuels with different composition and combustion organization were simulated in details, and results showed that significant increase in reduction of SO2 at furnace exit could be achieved by proper sorbent injection. The sorbent injection locations were analyzed with special care to enable maximum SO2 capture in the case-study furnace under investigated conditions. Most of the test-cases with low SO2 capture had one or more of the following problems: intensive particle sintering, low local temperatures (leading to low calcination rates), or bad particles distribution. Significant SO2 retention was possible when the process was organized in such a way that particles were exposed to optimal temperature range, and injected in the furnace zones with high SO2 concentration simultaneously. It was shown that better results can be achieved by injection of sorbent through multiple burner tiers, with SO2 emission reduction efficiency around 60% at the furnace exit in several well optimized test-cases.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "International Journal of Heat and Mass Transfer", title = "Numerical modeling of in-furnace sulfur removal by sorbent injection during pulverized lignite combustion", pages = "114-98", volume = "128", doi = "10.1016/j.ijheatmasstransfer.2018.08.129" }
Tomanović, I., Belošević, S. V., Crnomarković, N., Milicević, A.,& Tucaković, D.. (2019). Numerical modeling of in-furnace sulfur removal by sorbent injection during pulverized lignite combustion. in International Journal of Heat and Mass Transfer Pergamon-Elsevier Science Ltd, Oxford., 128, 98-114. https://doi.org/10.1016/j.ijheatmasstransfer.2018.08.129
Tomanović I, Belošević SV, Crnomarković N, Milicević A, Tucaković D. Numerical modeling of in-furnace sulfur removal by sorbent injection during pulverized lignite combustion. in International Journal of Heat and Mass Transfer. 2019;128:98-114. doi:10.1016/j.ijheatmasstransfer.2018.08.129 .
Tomanović, Ivan, Belošević, Srđan V., Crnomarković, Nenad, Milicević, Aleksandar, Tucaković, Dragan, "Numerical modeling of in-furnace sulfur removal by sorbent injection during pulverized lignite combustion" in International Journal of Heat and Mass Transfer, 128 (2019):98-114, https://doi.org/10.1016/j.ijheatmasstransfer.2018.08.129 . .