York Resource Recovery Center Metal Spray Success

Early US waste-to-energy plants were constructed using conventional boilers designed for fossil fuels, gas, and oil. Combusting MSW exposed those boilers to high levels of sulfides and chlorides that caused accelerated corrosion problems. MSW fuel required higher amounts of excess air that resulted in high furnace gas velocities and metal erosion. Depending upon the individual design of each boiler, effects of higher upper furnace temperature, flame impingement, and flyash carry over were reported. This paper describes a test conducted to extend the useful metal life of superheater tubes by employing recently developed high velocity continuous combustion (HVCC) metal spray materials.