Abstract
To explain the combustion behavior of RDF in a fluidized bed, three kinds of model RDF, two kinds of RDF from industrial solid waste (ISW) and two kinds of RDF from municipal solid waste (MSW) were burnt in a bubbling-type fluidized bed combustor. The experimental data of CO, NOx and HCl concentration 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 density and weak mechanical strength RDF than that of other RDFs, and it can be controlled by secondary air injection. NOx concentration and conversion of fuel-N to NOx from the combustion of larger RDF which contained more metal compounds is far higher than other RDFs. Conversion of fuel-N to NOx is increased with increasing Ca/ (S+0.5Cl) molar ratio because CaO promotes catalytically production of NO. HCl concentration in the flue gas from the combustor decreases with increasing Ca/ (S+0.5Cl) molar ratio. De-hydrochlorination by CaO decreases with increasing combustion temperature.
