Open AccessNumerical simulations of the combustion characteristics for a 660MW tangentially fired boiler with different closing-to-wall air velocities
Author(s) -
Kui Liang,
Guangkui Liu,
Feng Liu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/721/1/012041
Subject(s) - boiler (water heating) , airflow , combustion , mechanics , power station , air velocity , environmental science , materials science , waste management , engineering , mechanical engineering , chemistry , electrical engineering , physics , organic chemistry
To solve the problem of high temperature corrosion of water-cooled wall of power station boiler, this paper proposes a new type technology of closing-to-wall air. Taking a 660MW tangentially fired boiler as the research object, numerical simulations were conducted to study the influences of closing-to-wall air velocity on the combustion characteristics in the boiler. The results show that O 2 concentration in the flowing region is significantly increased, CO concentration is significantly reduced, and the oxidizing atmosphere in the near-wall region is enhanced. As the closing-to-wall air velocity increases, the rigidity of the airflow is gradually stronger, and the penetration depth of the airflow increases, so that the coverage area of the airflow is increased. The influence of the closing-to-wall air velocity on the combustion effect of the boiler is negligible.