Axial transport and residence time of MSW in rotary kilns: Part II. Theoretical and optimal analyses

摘要: Abstract A novel particulate trajectory model (PTM) is developed to predict axial transport and dispersion of municipal solid wastes (MSW), based on the vector analysis particle's gravity-induced displacement in a single excursion. Three parts work are extended with respect this PTM. First, simplified formulas about mean residence time (MRT) material volumetric flow (MVF) derived by incorporating statistic-averaged all repeated excursions solids within kiln into The correctional factors—et for MRT ef MVF—are introduced improve model's validity under such practical cases, i.e. irregular MSW existence or internal-structure presence. Reasonable agreement obtained between empirical experiments correlation factor excess 90% runs. Second, stochastic PTM distribution (RTD) curves segregated considering probability rolling distance individual particle. As MSW, main cause segregation solids, due variation components, shapes sizes. Finally, optimization geometry design laboratory-scale rotary pyrolyser presented corresponding optimum solutions provided.