Analysis and Prevention of High Sulfur Coal Corrosion on Boiler Heating Surface
High-sulfur coal burning will mainly cause high-temperature sulfur corrosion thinning of the water wall,transverse cracking of the water wall,and low-temperature dew point corrosion of the rear pass.In this paper,three types of corrosion failure samples were examined by macroscopic inspection,metallograph analysis,SEM and EDS energy spectrum analysis.Combined with on-site working conditions,the corrosion mechanism is analyzed.It was concluded that the total sulfur content of coal burning and the sootblower arrangement had an important role in promoting high-temperature sulfur corrosion.Based on this conclu-sion,it is suggested that the power plant should strengthen the inspection of the wall thick-ness of the pipes near the sootblower during the overhaul,which has helped many units to e-liminate potential safety hazards.
high sulfur coalhigh temperature sulfur corrosionlow temperature dew point corrosiontransverse cracking
万方数据
维普
