Heat Transfer Characteristics Analysis And Optimization Of The Grate Cooler Based On The Porous Media Model

In modern times, the energy issue has been the focus of global attention. Our country also started to execute many new policies in all walks of life, especially after our country energetically advocate "energy conservation and emissions reduction, low carbon development" policy. For traditional energy consumption and high pollution industry, our country has implemented more stringent energy recovery and emission standards. As a high energy consumption and high pollution cement industry, there is a need to make the corresponding energy saving transformation in order to achieve the purpose of saving energy to purify the environment. As an important energy recovery equipment in cement production line, the grate cooler is one of the most important. However, in the past for a long time, people’s understanding of grate cooler only limited to the actual production experience, lacking of systematic research of energy recovery.in the interior of grate cooler So it is necessary to build grate cooler model according to the actual size of it, using computer software to do some simulation about grate cooler internal heat exchange process, in order to explore the grate cooler internal real heat transfer law, so as to provide reference for technology reform of grate cooler.This article selected the present typical 3000 t/d cement production line, combined with the production characteristics of grate cooler, established two-dimensional simulation model of grate cooler, and selected the corresponding physical model, established a relevant mathematical model, especially analyzed the porous medium model settings and the related parameters of the calculation process. This article took commercial CFD software FLUENT as the platform, used the dynamic grid technology, got the results of numerical simulation of grate cooler, studied on the process of heat transfer between clinker and cooling air, simulated and analyzed the internal cooler temperature and velocity distribution, verified the correctness of the model by analysis of the simulation results.On this basis, this paper also studied and analyzed the change of five main thermal parameters on the influence of grate cooler internal heat, which including the porosity of cement clinker, the average particle diameter of cement clinker, layer thickness of cement clinker, cooling air speed and advancing speed of grate bed. And then revealed the influence law of these parameters on the outlet air temperature. Finally used the orthogonal experimental method to optimize the parameters of grate coole, obtained the best operation of the corresponding parameter values.. According to which we can do some settings in the actual operation, providing certain guiding value for design and operation of grate cooler.