The effect of startup procedure of probe exposures on deposit and corrosion formation in a waste fired CFB boiler.

Övrigt konferensbidrag, 2015

This paper investigates the startup sequence influence on the initial deposit formation and consequently, the corrosion attack in a waste fired Circulating Fluidized Bed (CFB) boiler. Two probes were exposed simultaneously; one probe starting exposure from room temperature and one probe starting exposure after 100 °C preheating. The samples consisted of Sanicro 28 highly alloyed stainless steel. Regardless of preheating or preoxidizing the sample probe the corrosion attack is still very fast leading to thick oxide scales and formation of metal chlorides resulting in poor scale adhesion. By preheating and preoxidation, the attack as well as the amount of metal chlorides was decreased slightly. Thus, the startup sequence seems to have only a minor effect on the initial stages of exposure.