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Abstract
This study employed a laboratory-scale fluidized bed incinerator to investigate the emission characteristics of chlorobenzenes, chlorophenols and dioxins in the incineration of organic and inorganic chlorides with different additives CaO and CuO. Experimental results showed that most benzene and phenol compounds were present in gas phase but most dioxins were present in solid phase. More gas-phase chlorobenzenes and chlorophenols were emitted from the incineration of inorganic chloride than organic chloride. With additive CaO, the emission rate of HCl and the formations of chlorobenzenes and chlorophenols through Deacon Reactions were reduced, especially at higher operation temperature 800°C. With additive CuO, the decompositions of benzene and phenol compounds were enhanced; however, more chlorobenzenes and chlorophenols were formed in specific cases such as incinerating organic chloride at lower temperature 600°C. Incineration of organic chloride produced more dioxins than inorganic chloride. Adding CaO could reduce the formations and TEQ of dioxins in the incineration of organic chloride, but increased that in the incineration of inorganic chloride. This was attributed to that the fluidization quality and combustion efficiency of fluidized bed incinerator were invalid by the sintering or fusing of fluidized media with CaO and NaCl at high temperature.
