Coefficients of longitudinal and transversal dispersion of mass on the grates for waste incineration systems

The paper describes the methods of evaluating longitudinal and transversal dispersion coefficients for forward moving and reciprocating grates. The methods are based on both theoretical and dimensional analyses. The values of the coefficients obtained theoretically at various parameters of material (density, particle diameter) and various parameters of grate movement (grate bars velocity, inclination angle) were verified using two methods. The first method is based on the analysis of the Peclet number calculated from the residence time distribution. The second one is based on the comparison of the concentration field determined experimentally with the values obtained by mathematical method. Both methods give satisfactory results.