Study on Slagging Problem of 660 MW Opposed Firing Coal-Fired Boiler

The continuous slagging problem occurred in the operation of a 660 MW supercritical opposed firing boiler, which seriously affected the safe operation of the boiler. From the analysis of coal composition, combustion air distribution mode and other equipment factors, it is considered that the main reasons for the slagging of the boiler include the large proportion co-combustion of Shenhua coal and Philippine coal with strong slagging and the strong swirl of the external secondary air of the central burner. According to the actual situation of boiler slagging, the corresponding solutions are put forward to ensure the safe and stable operation of the unit.