Behavior of flue gas and hydrochloric acid removal with combustion test ofRDF in bubbling fluidized bed

To explain the combustion behavior of RDF in a fluidized bed, three kinds o f model RDF, two kinds of RDF from industrial solid waste (ISW) and two kin ds of RDF from municipal solid waste (MSW) were burnt in a bubbling-type fl uidized bed combustor. The experimental data of CO, NOx and HCl concentrati on in the flue gas from the combustor are presented. It is found that much higher CO concentration in the flue gas occurs in the combustion of low den sity and weak mechanical strength RDF than that of other RDFs, and it can b e controlled by secondary air injection. NOx concentration and conversion o f fuel-N to NOx from the combustion of larger RDF which contained more meta l compounds is far higher than other RDFs. Conversion of fuel-N to NOx is i ncreased with increasing Ca/(S+ 0.5 Cl) molar ratio because CaO promotes ca talytically production of NO. HCl concentration in the flue gas from the co mbustor decreases with increasing Ca/ (S + 0.5 Cl) molar ratio. De-hydrochl orination by CaO decreases with increasing combustion temperature.