The causes leading to high-temperature corrosion on water-wall of boiler no.2 in Heze Power Plant have been analysed

it is believed that the said corrosion was mainly due to excessive high sulfer content in the fuel coal

reductive atmosphere appeared in vincinity of the water-wall

long-term operation under high load

and insufficient adjustment of combustion. Through strictly controlling quality of coal coming into furnace

enhancing fineness of pulverized coal

paying attention to adjustment of combustion

as well as retrofitting dual-channel burners

and spraying water-wall with anti-corrosion coating material

the service life of water-wall has been effectively lengthened

the formation and development of high-temperature corrosion being contained

obtaining good comprehensive benefits.