FIELD: burning sulfur-containing fuels, for example, some types of coal or oil residues in boilers in particular having fluidized bed under pressure or under atmosphere pressure. SUBSTANCE: device used for treatment of solid residues has fluidized-bed boiler, fuel grinding unit, limestone grinding unit, plant for production of sulfuric acid, unit for reactivation of solid substance and unit for directing the reactivated solid substance partially to furnace of boiler and partially to cement plant. EFFECT: reduced amount of carbon dioxide liberated at calcination of limestone. 12 cl, 5 dwg
