Gaseous emissions from co-combustion of sewage sludge and coal/wood in a fluidized bed

摘要: Co-combustion of sewage sludge together with coal or wood has been investigated in two circulating fluidized bed (CFB) plants, a laboratory scale plant and pilot 12MWth CFB boiler, both which the gas residence times are comparable to those commercial plant. The investigation focuses on emissions harmful gases from co-combustion compared mono-combustion influence air supply. result shows that can be carried out designed for base fuel without exceeding EU German emission limits energy fractions less than 25%, except chlorine may have reduced by flue treatment. Although contains large quantities nitrogen sulfur, beneficial properties lead considerable reduction oxides, only few percent was effectively converted NO N2O. Sulfur captured conventional limestone addition, but as this method is not efficient coal.