Waste Incineration Plant Modeling Using a Parallelized Domain Decomposition Method with Locally Refined Subgrids

摘要

The thermal utilisation of waste is a proven technology which is, in combination with avoidance and recycling concepts, integral part of the waste disposal strategy of many countries. A detailed knowledge of the reacting fiowfield in the combustion chamber of waste incinerators is needed to be able to fulfil future requirements which arise from environmental protection measures. Since the flowfield strongly depends on the conversion of the waste on the grate, a one-dimensional model is used to simulate the processes of drying, devolatilization, residual char combustion and CO-formation on the grate. In this model the parameters calculated along the grate are regarded as a representation of their crosswise distribution and are used as boundary conditions for a three-dimensional CFD-code for turbulent reacting flows. Flow simulation results for a full-scale waste incineration plant using a parallelized, blockstructured and locally refined grid are presented along with details of the submodels implemented.