Study On Computational Heat Transfer Method For Thickness Monitoring Of Refractory Erosion Zone In Glass Furnacey

For float glass enterprises,in order to meet the market demand for high-performance glass,taking high aluminum glass as an example,the raw materials need higher temperature and alkaline mixture to assist melting in the melting process,which aggravates the erosion of refractory bricks on the wall of the furnace.When glass furnace enters the later stage of use,the wall brick with unknown erosion degree will undoubtedly bring safety hazard to production.In order to ensure the safe and stable production of glass,a scientific method is needed to predict the thickness of the erosion zone of the pool wall brick.In this paper,based on numerical heat transfer,the combined heat transfer process of heat conduction,convection and radiation in the pool wall is studied,and the dependence of various thermophysical parameters on the thickness of refractories is qualitatively analyzed.According to the principle of numerical heat transfer,a method to calculate the thickness of pool wall brick is proposed by using Fluent and Isight.Research on the method of thickness calculation by collaborative optimization.The simplified physical model and grid model of the furnace are created,and the key areas are parameterized.The parameters such as structure,material and boundary conditions collected by the enterprise during the baking period are brought into the software,and the calculation results are taken as the initial iteration calculation model,and the calculation results are basically consistent with the measured data.The platform can be adjusted according to the structure of the kiln and has wide applicability.The error of the calculation results is analyzed.The influence of erosion depth,heat source temperature and cooling wind speed on the external surface temperature of pool wall brick was quantitatively analyzed.Based on the three main variables,the correlation coefficient between the temperature data of the control group and the experimental group was calculated by using the collaborative optimization platform.The maximum correlation coefficient was 0.994 and the average error was about 10.8% after 500 iterations.Experimental scheme and verification study of calculation method of refractory brick thickness.The experiment of high temperature heat transfer in glass furnace was carried outby using refractory bricks with different thickness and combining with the sealed heating temperature measurement system of muffle furnace.When the thickness of refractory brick is 75 mm and the temperature of internal heat source is 1450 ℃,the predicted thickness is 84.38 mm with an error of 12.50%,and the average error of the whole experiment is 15.66%.To sum up,it shows that the method and principle of calculating the thickness of erosion zone of glass furnace based on numerical heat transfer theory are correct and the technology is operable,which can be applied to predict the thickness of pool wall refractory.