Along with increasing unit capacity in power plants

and putting desulfuration and denitrification system into operation

the possibility of furnace implosion troubles occurred in boilers is increasing. The factors affecting occurence of furnace implosion in boilers have been presented

the influence of flue gas desulfuration(FGD) upon the furnace implosion of boilers being analyzed

and several measures

such as strictly controlling the stability of flame

adopting axial-flow induced draft fan and booster air fan in FGD system

as well as avoiding rapid changeover from main pass to by-pass in the events of FGD system shutdown or the protection being in action

etc.

to reduce the probability of furnace implosion occurring in boilers.