Fireside corrosion in kraft recovery boilers

摘要: Causes and corrective measures are reviewed for several common types of fireside corrosion in kraft recovery boilers. Corrosion differs significantly with location the boiler due tio great differences metal surface temperature deposit flue gas chemistry. Sulphidation associated sulphur-bearing gases under reducing conditions is dominant lower furnace, while sulphidation/oxidation resulting from gas-deposit-metal reactions important upper boiler. In many cases, although has been controlled by ensuring absence a molten phase at surface, mechanism not fully understood.