Open AccessSimulation analysis of boiler high temperature corrosion atmosphere under lean oxygen operation
Author(s) -
Hong Xu,
Weigang Xu,
Houzhang Tan
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/467/1/012102
Subject(s) - boiler (water heating) , high temperature corrosion , combustion , corrosion , oxygen , reducing atmosphere , environmental science , metallurgy , power station , thermal power station , materials science , waste management , chemistry , engineering , electrical engineering , organic chemistry
High-temperature corrosion is a major threat to the safe operation of thermal power plants. The reducing atmosphere induced by boiler lean oxygen combustion has close relation with the water walls corrosion. In this paper, the reducing atmosphere such as CO, H 2 S concentration distribution was simulated targeted on a boiler. Under the full load, the atmosphere and the temperature distribution in low nitrogen combustion mode were further studied on different excess air ratios and the rates and position of the SOFA air conditions. With the SOFA rate increasing, the flame centre moved up, the boiler temperature is more uniform, and the temperature at the furnace outlet increased. the concentration of CO and H 2 S in the main combustion zone is obviously increased. In the burnout zone, there is almost no CO and H 2 S due to the supplement of SOFA.