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为研究高发射率涂料在高炉热风炉蓄热室内的应用效果,应用数学模拟和工业试验对比的研究方法对节能效果进行了分析.结果表明:模拟结果接近工业应用数据,可以定量地说明涂料对热风炉传热过程的积极作用;应用高发射率涂料后,可使高炉热风炉热风温度升高25℃,烟气温度降低13℃.结合数学模拟和工业热诊断结果,对涂料在热风炉内使用的节能机理进行了分析.认为在格子砖表面涂覆高发射率涂料,在燃烧期会使蓄热体内烟气与格子砖辐射换热加强,格子砖表面温度增加,且使蓄热体蓄热量增加.模拟结果表明:烟气中CO2成分对提高辐射传热起重要作用;CO2体积分数平均每提高5%,则热风温度提高6～8℃.
In order to study the application effect of high emissivity coating in blast furnace hot blast furnace regenerator, the energy saving effect was analyzed by the comparison of mathematical simulation and industrial test.The results show that the simulation results close to the industrial application data, After the high emissivity coating is applied, the temperature of hot air in blast furnace can be increased by 25 ℃ and the temperature of flue gas can be reduced by 13 ℃. Combined with mathematical simulation and industrial thermal diagnosis results, The energy-saving mechanism was analyzed.It is considered that coating high-emissivity coatings on the surface of the lattice bricks will enhance the radiative heat transfer between the flue gas and the lattice bricks in the regenerator during the combustion period, increase the surface temperature of the lattice bricks, The simulation results show that the content of CO2 in the flue gas plays an important role in improving the radiative heat transfer. When the volume fraction of CO2 increases by 5% on average, the temperature of the hot air increases by 6 ~ 8 ℃.