A process simulation model was constructed for a 2 ton/hr plant for a large scale MSW incinerator. The simulation model was designed to provide system performance parameters according to various operating conditions. In accomodating the wide variation of quality and compostion of input wastes, the plant operating parameters such as regulating excess air, preheated air temperature, the waste feed rate and ratio of flowrate of air to the stoker must be carefully controlled. A predictive model is divided into submodules of F.D fan, interconnecting ducts, combustion chamber, water cooler. The model calculates operating variables of each submodule, by employing the steady state thermal and material balance equations. Combustion of waste bed, and its radiative heat transfer in the combustion chamber are considered. The results of combustion chamber are evaluated for performance in the sense of temperature, locations and width of the flame band and mean residence time in the secondary combustion chamber and they are compared with field test results for verification of the model. These model predictions may be used to help operators by providing more information on the plant performance.
