Study Of Heat Transfer In The Cement Clinker Based On The LBM And FVM

As countries around the world constantly improve the understanding of low-carbon economy, energy consumption, pollution and heat recovery problem s in cem ent production has gradually becom e the focus of the world cement industry. Grate cooler is one of the most im portant process equipment in the process of ce ment production, The heat transfer proces s of cem ent clinker in th e grate cooler is dir ectly related to e nergy consumption, pollution, heat recovery problem s and the quality of cemen t. In this paper, we study the heat transfer m echanism of the cem ent clinker and the heat transfer law of the all cement clinker which will provide the oretical basis to optimize the grate coole r parameters, improve heat recovery, energy conservation and emissions reduction.At first, The unit body which represents the sm allest unit of the ce ment clinker macroscopic physical properties is built with experimental method and its s ize is gained. The two dimension model of the unit body which provides the data of pore structure of the cement clinker. The model provides a basis in cement clinker heat transfer research is built with section method and statistical method.Secondly, the air flow f ield and temperature field and cement clinker tem perature field of the unit body which reveal the heat transfer m echanism of ce ment clinker are obtained with the lattice Boltzmann method based on the pore size. The reasonable for the wind speed is gained. The results show th at the accum ulation of cem ent clinker and porosity have a great influence on the cooling effect.Finally, the mathematical model which is co nsidered the effect of local th ermal equilibrium effect, thermal dispersion, partic le size and variable porosity on the heat transfer is built for the whole cement clinker, the control equations are dispersed with the finite volume method, the discrete equations are solved with SIMPLE, therefore, this paper obtains the heat transfer law of the cement clinker. The mathematical model is correct by comparing the data collected in the field.