In view of the difficult problem concerning slagging diagnosis in the furnace of pulverized-coal fired boilers

the relationship between routine parameters which can be acquired in the operation of large-scale pulverized-coal fired boiler and the slagging degree in the furnace has been studied. From the view point of practical use in engineering

a diagnosis model for effectively estimating the overall slagging degree in the boiler based on some comparatively fuzzy phenomena was established. The said model was clear in physical tenants and succinct in computation process

provided the routine operational parameters are acquired

the on-line diagnosis for slagging can be carried out. The calculation shows

the said method is simple and reliable

and the results being reasonable.