Sustainable Mining and Metallurgy

The corrosion control of the heating surface of biomass boiler of power plant is the key technology for the effective utilization of biomass energy. It is of great significance to study the influencing factors of high temperature corrosion of the heating surface of biomass boiler for guiding the safe operation of biomass boiler. In this paper, the common biomass-maize straw in China was taken as the research object. Based on the tube furnace experimental system, the experimental platform of metal heating surface deposition corrosion was built. The effects of ash, washing and additives on the high temperature corrosion of boiler heating surface in biomass power plant were deeply studied, which provides theoretical support for the corrosion prevention and control of biomass boiler. The results show that the presence of biomass ash will accelerate the corrosion of the heating surface of the biomass boiler. The corrosion rate of the boiler with ash deposition is 21.15% higher than that without ash deposition. Washing and adding mineral additives will inhibit the corrosion of biomass ash on the heating surface of boilers. Under the condition of simulated boiler temperature of 650℃, the corrosion rate of biomass ash after washing decreased by 8.93%, while the corrosion rate of biomass ash after adding 5% kaolinite decreased by 9.62%.