A cement kiln is a counter-flow type of process in which a complex series of exothermic and endothermic reactions take place.
To understand its behavior and to provide a means of improving computer control, a dynamic partial differential model of the kiln has been developed. In this paper, the basic reactions and assumptions of the model will be discussed. A model of a coal/oil flame which takes into account the surrounding temperatures is developed. The dynamic behavior of the kiln as exhibited by this model is then indicated.
In particular, it is shown that the interaction between the two exothermic reactions causes the kiln to be basically unstable with respect to regulating the position of the burning zone.
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28, Feb 2016
