The Numerical Simulation And Experimental Research Of Grate Clinker Cooler System

Grate clinker cooler system is the core part of new dry cement production process for cooling, but the study of the thermal characteristic of grate clinker cooler lacks the systematic analysis. The operation and improvement rely mainly on the experience. Therefore, according to the actual production equipment, the establishment and the calculation of the simulation model of the cooling process within grate cooler have been an urgent issue.This article uses the method of combining experimental measurement and numerical simulation, and has carried on the research of heat transfer and flow characteristics of grate clinker cooler of a 2300t/d cement production line. Decorate monitoring and sampling points reasonably combined with field condition, and then measure the physical quantities in the actual working condition and get the required data. Then thermal efficiency and heat recovery are calculated.Using FLUENT software, the 2D simulation model has been established, including the physical model and mathematical model. The porous media model and dynamic mesh model are used to imitate the clinker movement in the grate cooler to research the flow and heat transfer process between clinker and cooling air and get the velocity distribution nephogram, pressure distribution nephogram and temperature distribution nephogram. The comparison with experimental data verifies he accuracy of the numerical simulation of the grate cooler. Numerical results for the grate cooler provide a reliable theoretical basis for heat recovery engineering, and a reference for the operation of grate cooler.In order to study the influence of the clinker thickness, the inlet cooling air and the porosity & particle size on the pressure distribution and temperature distribution within the grate cooler, numerical simulation of the models with different conditions are carried out, and distribution regularities of thermal efficiency and heat recovery are obtained. This paper presents an improvement measure to increase the thermal efficiency and heat recovery, which need to add an additional outlet in the back of the grate cooler. Compared with the former condition, thermal efficiency and heat recovery has improved significantly.