Effect of staged-air box structure on combustion and NOx emissions from a 300 MWe downshot-fired utility boiler

Lun Ma, Qingyan Fang, Chungen Yin, Bin Yao, Cheng Zhang, Gang Chen

Publikation: Konferencebidrag uden forlag/tidsskriftPaper uden forlag/tidsskriftForskningpeer review

Resumé

Downshot-firing systems are widely used to burn coals with low volatile matter content, but often reported to have operational problems. This paper comprehensively investigates the effect of the staged-air box structure on the performance of a 300 MWe downshot-fired utility boiler.
First, testing and modelling are done on a 1:1-scaled model of the staged-air box to study the cold flow under one original and two new windbox structures, which sheds light on the proper use of a new staged-air box in the boiler. Then, simulations are performed for the utility boiler
to further investigate the influence of the new staged-air boxes on the boiler performance. Finally, the utility boiler is retrofitted by using one of the newly designed staged-air box. Performance tests are made for the boiler before and after the retrofit, showing the use of the new staged-air box greatly improves the boiler performance at full load, e.g., NOx reduction by 20.7% and thermal efficiency improvement from 88.76% to 90.48%.
OriginalsprogEngelsk
Publikationsdatookt. 2018
Antal sider11
StatusUdgivet - okt. 2018
Begivenhed13th Conference on Sustainable Development of Energy, Water and Environment Systems (ISSN 1847-7178) - Palermo, Italien
Varighed: 30 sep. 20184 okt. 2018
http://www.palermo2018.sdewes.org/

Konference

Konference13th Conference on Sustainable Development of Energy, Water and Environment Systems (ISSN 1847-7178)
LandItalien
ByPalermo
Periode30/09/201804/10/2018
Internetadresse

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Boilers
Air
Coal
Testing

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    Citer dette

    Ma, L., Fang, Q., Yin, C., Yao, B., Zhang, C., & Chen, G. (2018). Effect of staged-air box structure on combustion and NOx emissions from a 300 MWe downshot-fired utility boiler. Afhandling præsenteret på 13th Conference on Sustainable Development of Energy, Water and Environment Systems (ISSN 1847-7178), Palermo, Italien.
    Ma, Lun ; Fang, Qingyan ; Yin, Chungen ; Yao, Bin ; Zhang, Cheng ; Chen, Gang. / Effect of staged-air box structure on combustion and NOx emissions from a 300 MWe downshot-fired utility boiler. Afhandling præsenteret på 13th Conference on Sustainable Development of Energy, Water and Environment Systems (ISSN 1847-7178), Palermo, Italien.11 s.
    @conference{22d0e79485cd4caaa4f64c63d1fb1184,
    title = "Effect of staged-air box structure on combustion and NOx emissions from a 300 MWe downshot-fired utility boiler",
    abstract = "Downshot-firing systems are widely used to burn coals with low volatile matter content, but often reported to have operational problems. This paper comprehensively investigates the effect of the staged-air box structure on the performance of a 300 MWe downshot-fired utility boiler.First, testing and modelling are done on a 1:1-scaled model of the staged-air box to study the cold flow under one original and two new windbox structures, which sheds light on the proper use of a new staged-air box in the boiler. Then, simulations are performed for the utility boilerto further investigate the influence of the new staged-air boxes on the boiler performance. Finally, the utility boiler is retrofitted by using one of the newly designed staged-air box. Performance tests are made for the boiler before and after the retrofit, showing the use of the new staged-air box greatly improves the boiler performance at full load, e.g., NOx reduction by 20.7{\%} and thermal efficiency improvement from 88.76{\%} to 90.48{\%}.",
    keywords = "Downshot-fired boiler, staged-air box, aerodynamic field, thermal efficiency, NOx emission",
    author = "Lun Ma and Qingyan Fang and Chungen Yin and Bin Yao and Cheng Zhang and Gang Chen",
    year = "2018",
    month = "10",
    language = "English",
    note = "13th Conference on Sustainable Development of Energy, Water and Environment Systems (ISSN 1847-7178), SDEWES 2018 ; Conference date: 30-09-2018 Through 04-10-2018",
    url = "http://www.palermo2018.sdewes.org/",

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    Ma, L, Fang, Q, Yin, C, Yao, B, Zhang, C & Chen, G 2018, 'Effect of staged-air box structure on combustion and NOx emissions from a 300 MWe downshot-fired utility boiler' Paper fremlagt ved, Palermo, Italien, 30/09/2018 - 04/10/2018, .

    Effect of staged-air box structure on combustion and NOx emissions from a 300 MWe downshot-fired utility boiler. / Ma, Lun; Fang, Qingyan; Yin, Chungen; Yao, Bin; Zhang, Cheng; Chen, Gang.

    2018. Afhandling præsenteret på 13th Conference on Sustainable Development of Energy, Water and Environment Systems (ISSN 1847-7178), Palermo, Italien.

    Publikation: Konferencebidrag uden forlag/tidsskriftPaper uden forlag/tidsskriftForskningpeer review

    TY - CONF

    T1 - Effect of staged-air box structure on combustion and NOx emissions from a 300 MWe downshot-fired utility boiler

    AU - Ma, Lun

    AU - Fang, Qingyan

    AU - Yin, Chungen

    AU - Yao, Bin

    AU - Zhang, Cheng

    AU - Chen, Gang

    PY - 2018/10

    Y1 - 2018/10

    N2 - Downshot-firing systems are widely used to burn coals with low volatile matter content, but often reported to have operational problems. This paper comprehensively investigates the effect of the staged-air box structure on the performance of a 300 MWe downshot-fired utility boiler.First, testing and modelling are done on a 1:1-scaled model of the staged-air box to study the cold flow under one original and two new windbox structures, which sheds light on the proper use of a new staged-air box in the boiler. Then, simulations are performed for the utility boilerto further investigate the influence of the new staged-air boxes on the boiler performance. Finally, the utility boiler is retrofitted by using one of the newly designed staged-air box. Performance tests are made for the boiler before and after the retrofit, showing the use of the new staged-air box greatly improves the boiler performance at full load, e.g., NOx reduction by 20.7% and thermal efficiency improvement from 88.76% to 90.48%.

    AB - Downshot-firing systems are widely used to burn coals with low volatile matter content, but often reported to have operational problems. This paper comprehensively investigates the effect of the staged-air box structure on the performance of a 300 MWe downshot-fired utility boiler.First, testing and modelling are done on a 1:1-scaled model of the staged-air box to study the cold flow under one original and two new windbox structures, which sheds light on the proper use of a new staged-air box in the boiler. Then, simulations are performed for the utility boilerto further investigate the influence of the new staged-air boxes on the boiler performance. Finally, the utility boiler is retrofitted by using one of the newly designed staged-air box. Performance tests are made for the boiler before and after the retrofit, showing the use of the new staged-air box greatly improves the boiler performance at full load, e.g., NOx reduction by 20.7% and thermal efficiency improvement from 88.76% to 90.48%.

    KW - Downshot-fired boiler

    KW - staged-air box

    KW - aerodynamic field

    KW - thermal efficiency

    KW - NOx emission

    UR - http://www.palermo2018.sdewes.org/programme.php

    M3 - Paper without publisher/journal

    ER -

    Ma L, Fang Q, Yin C, Yao B, Zhang C, Chen G. Effect of staged-air box structure on combustion and NOx emissions from a 300 MWe downshot-fired utility boiler. 2018. Afhandling præsenteret på 13th Conference on Sustainable Development of Energy, Water and Environment Systems (ISSN 1847-7178), Palermo, Italien.