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 fa.

Taking the auto- controlling system of water temperature inside the boiler settles as the object of study, the PID controlling method based on BP neural network is put forward, and compare with classical PID.