Three-dimensional flow thermal coupling modeling method for cement grate cooler

Abstract

The invention discloses a three-dimensional flow thermal coupling modeling method for a cement grate cooler. The modeling method takes a cement clinker layer in the grate cooler as a porous medium, applies a mechanics of fluid through porous media theory for modeling, and comprises the following steps: building a three-dimensional flow thermal coupling physical model of the cement grate cooler according to the cooling condition of the clinker in the grate cooler; building a three-dimensional flow thermal coupling mathematical model of the grate cooler according to the physical model, the law of mass conservation, the law of conservation of momentum and the law of conservation of energy. The modeling method has the benefits that the factors of grate speed, supplied wind velocity, side wall heat dissipation, feeding temperature, clinker particle diameter, and the like are considered; the three-dimensional temperature distribution of the clinker can be calculated conveniently and accurately; different cooling strategies are simulated by adjusting the working condition parameters, so as to obtain an optimal strategy enabling the grate cooler to work efficiently and reasonably, improve the heat recovery efficiency of the grate cooler, and achieve the purposes of energy conservation and emission reduction; the modeling method is the optimal clinker cooling strategy applied to confirm that the discharging temperature of the grate cooler is relatively low, and the recovery wind warm is relatively high.

Description

technical field [0001] The invention relates to the technical field of cement clinker burning system modeling, in particular to a three-dimensional flow-thermal coupling modeling method for a cement grate cooler. technical background [0002] my country is a big country in cement production and consumption, with an annual output of 2.41 billion tons, which is close to 50% of the world's cement production. The proportion of domestic cement equipment in the international cement trade has reached more than 1 / 3. With the continuous improvement of low-carbon requirements in various countries, the issues of energy consumption, pollution and heat recovery in cement production have gradually become the focus of the global cement industry. The cement production line is mainly divided into two systems: grinding and firing. The cooling process of cement clinker in the firing system is an important link for heat energy recovery and reduction of polluting dust emissions. The grate cooler...

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Problems solved by technology

The advantage of these models is that there is no need to understand the heat transfer mechanism in the grate cooler, and the modeling process is simple. However, due to the complex process of the grate co

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