Experimental Study on Reducing NOx Emission of 300MW Coal-Fired Boiler with Burners in Front and Back Walls

Author

Bai, Tao ; Sun, Baomin ; Kang, Zhizhong ; Guo, Yonghong

Author_Institution

Key Lab. of Condition Monitoring & Control for Power Plant Equip., North China Electr. Power Univ., Beijing, China

fYear

2011

fDate

25-28 March 2011

Firstpage

1

Lastpage

4

Abstract

Experimental study was carried on a 300MW swirling combustion pulverized coal firing furnace with put parts of tertiary air as over fire air to reduce NOx emission. The influence of boiler operational condition on the characteristics of NOx emission were studied, such as the content of O₂ at economizer exit, the proportion of the top tertiary air and mass flow of over fired air (OFA). Results show that the content of O₂ at economizer exit and the proportion of the top tertiary air have greater effect on boiler efficiency and NOx emission. It maintain the two parameters about 4% and 135t/h can inhibit NOx emission and have less influence on boiler efficiency; adjusting the opening of over fire air damper blow 60% can influence the NOx emission. After adjustment <;. The concentration of NOx emission concentration can control blow 800mg/Nm³. It could provide some technical gist for the same type of boiler.

Keywords

boilers; coal gasification; combustion equipment; environmental factors; furnaces; pulverised fuels; NOx emission reduction; air damper; air flow; back walls; burners; coal-fired boiler; economizer exit; front walls; mass flow; power 300 MW; pulverized coal firing furnace; swirling combustion; Boilers; Coal; Combustion; Fires; Fly ash; Power generation; Valves;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2011 Asia-Pacific

Conference_Location

Wuhan

ISSN

2157-4839

Print_ISBN

978-1-4244-6253-7

Type

conf

DOI

10.1109/APPEEC.2011.5749123

Filename

5749123