Minimising Corrosion and Deposit Formation during Biomass Combustion by Sulphate-containing Additives

H. Kassman, J. Alin & M. Berg
Combustion of a biomass with an enhanced content of chlorine (Cl) can result in operational problems including deposit formation and superheater corrosion. High levels of alkali chlorides (KCl during biomass) in the flue gas can enhance deposit formation and a high content of KCl in the deposits may accelerate superheater corrosion. The strategies applied to reduce such problems include the use of sulphur-containing additives. This paper describes application of the so-called ChlorOut concept. It consists...