EMISSIONS OF TRACE PRODUCTS OF INCOMPLETE COMBUSTION FROM A PILOT-SCALE INCINERATOR SECONDARY COMBUSTION-CHAMBER

Experiments were performed on a 73 kW rotary kiln incinerator simulato r equipped with a 73 kW secondary combustion chamber (SCC) to examine emissions of products of incomplete combustion (PICs) resulting from i ncineration of carbon tetrachloride (CCl4) and dichloromethane (CH2Cl2 ). Species were measured using an on-line gas chromatograph (GC) syste m capable of measuring concentrations of eight species of volatile org anic compounds (VOCs)in a near-real-time fashion. Samples were taken a t several points within the SCC, to generate species profiles with res pect to system residence time. For the experiments, the afterburner on the SCC was operated at conditions ranging from fuel-rich to fuel-lea n, while the kiln was operated at a constant set of conditions. Result s indicate that combustion of CH2Cl2 produces higher levels of measure d PICs than combustion of CCl4, particularly 1,2 dichlorobenzene, and to a lesser extent, monochlorobenzene. Benzene emissions were predomin antly affected by the afterburner air/fuel ratio regardless of whether or not a surrogate waste was being fed.