Numerical Simulation And Analysis Of The Grate Cooler Based On The Coupled Heat Transfer

Grate cooler is an important cooling equipment in cement production, due to lack of the systematic analysis for the thermal properties, the operation and improvement of the grate cooler are mainly depended on the experience, therefore, there is an increasing importance for establishing the simulation model of the grate cooler and exploring the thermal process in order to obtain the optimal operation parameters.In this dissertation, a3D simulation model of grate cooler is established based on the typical grate cooler’s characteristics of5000t/d in cement production process, including the physical model selection and establishment of mathematical model, focuse on the study of porous media model. Validate the model of grate cooler is correct. Analysis the simulation results of the grate cooler. Mathematic models for heat transfer of the grate cooler are established based on the platform of the computational fluid dynamics software Fluent6.3, the heat transfer process between the air and the cement material stuff is simulated by using the UDFs which realize the two-equation energy model. To explore the change of the grate cooler’s efficiency when the position of high temperature heat export and low temperature heat export is changed, velocity distribution field and temperature field are obtained.Four main thermal parameters are researched including the cement layer height, inlet velocity, porosity, particle size. Analysis the thermal parameters’s effect on obtain heat from the high temperature heat export and low temperature heat export. In order to improve the using amount of the grate cooler, orthogonal test method is used based on the platform of Fluent6.3, at the same time, four main parameters including the cement layer height, inlet velocity, porosity, particle size are optimizated.