Abstract
The purpose of this work is to establish design and operation methods for a municipal solid waste incinerator for complete combustion of flue gas, which is essential for reducing the generation of trace hazardous substances such as dioxins. The combustion conditions of an existing incinerator, therefore, are examined, and the results demonstrate that sufficient gas mixing and oxygen concentration coupled with combustion gas temperature in the secondary combustion chamber substantially lower carbon monoxide (CO) concentration in flue gas, an indicator of complete combustion. Furthermore, from the results of investigation in conjunction with the computer simulation of gas flow distribution inside the incinerator, some modification plans are suggested and actually implemented : a nose is installed at the furnace outlet and secondary air is supplied to the secondary combustion chamber. The performance tests after the modification indicate that the gas flow distribution in the secondary combustion chamber is equalized and the concentrations of CO and dioxins are significantly lowered.
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