Combustion, Corrosion and Fouling Aspect of Energy Recovery From Municipal Waste

Abstract

The characteristics of municipal waste as a fuel is marked mainly by its heterogeneous composition and relatively poor heating value. Two solutions have been proposed for its combustion, namely, in the form in which it is delivered, or after some type of preparation. Whichever solution is chosen, refuse boilers must contain certain features aimed specifically at the prevention of corrosion and fouling. Studies and investigations carried out over a 10-year period have achieved installations characterized by high and stable efficiency, excellent availability, and low maintenance costs. After a research of curative measures to be applied to existing plants (shield block, refractory concrete), the survey has been directed towards a research of preventive measures to be taken for new plants. These surveys have been principally based upon statistics in existing plants, evolution of the thermal balance-sheets in current operation, the physico-chemical analysis of fly ash, research of correlation between measurements of combustion chambers and phenomena of corrosion and fouling in convection banks.