Optimization of the heat exchange in the chain veils of the cement kilns: the heat exchange in the evaporation of moisture from the sludge with the decreasing velocity

This article deals with questions related to optimization of the heat exchange in the cement kilns chain veils of the wet production method. Optimization of these processes is connected, among other things, with the development of mathematical models that allow to adequately represent heat and mass transfer processes in chain veils.Only in this case it is possible to implement the design of optimal processes and optimal working regime of the cement kilns chain veils.In article the models of the moisture evaporation with the decreasing velocity in the regime of the direct heat and moisture exchange with the moisture evaporation from sludge film on the chains in the gas flow and in the regenerative heat and moisture exchange with the moisture evaporation from sludge touching the chains on the hearth of oven, are considered. The estimations of the moisture evaporation with the decreasing velocity in the regime of the direct heat and moisture exchange are obtained. A model of moisture evaporation with the decreasing velocity in the regenerative regime of the heat and moisture exchange is shown.The results of the calculation of the heat and mass exchanging processes in the chain veils of the cement kiln with the application of a program complex, based on a simplified model of moisture evaporation with the decreasing velocity in the regenerative regime of the heat and moisture exchange, are presented. The questions of moisture evaporation with the decreasing velocity, considered in this article give the possibility of the creation of the refined program complex of calculation of the heat and mass exchanging processes in the chain veils of the cement kilns with the heat and moisture exchange by the different regimes of the direct and regenerative the heat and moisture exchange with the decreasing velocity of the moisture evaporation.