Study on Wear Protection Strategies for Boiler Tubes in Waste-to-Energy Power Plants

With the wide application of waste incineration power generation technology, boiler tube wear due to high-temperature corrosion and erosion poses a major threat to the operational safety and economy of the power plant. This paper analyzes the main factors influencing waste incineration boiler tube wear and its mechanism, puts forward the optimization of flue inlet structure, and adds a secondary air protection strategy. Based on CFD simulation technology, the gas-solid two-phase flow field and particle erosion distribution were simulated and analyzed using the DPM and Finnie erosion models. The study shows that using an S-shaped structural design, adjusting the flue inlet wall angle, and increasing the secondary air by horizontal air supply can significantly improve the distribution of the gas flow field and reduce the erosion and wear of particles on the boiler tube wall. The results show that as the wall angle decreases, the airflow uniformity decreases, but the erosion rate also decreases. The secondary air velocity and the erosion rate exhibit a non-linear relationship, and the optimization of the air velocity can effectively reduce the wear of the boiler tube wall, which provides a scientific basis for the stable operation of the waste incineration boiler.