Numerical simulation of sulfur-containing gas escape control mechanism by water-cooled movable hood in converter blowing process
In order to investigate the efficacy of the water-cooled movable hood in controlling flue gas emissions during the copper matte blowing process in converters,a numerical simulation model based on the Reynolds-Averaged Navier-Stokes(RANS)method for multi-component flow and heat transfer was developed in this study.The research examined the impact of varying converter angles,hood positions,and hood lengths on controlling converter flue gas pollution and elucidated the underlying control mechanisms.The results show that the mechanism of converter flue gas control is the combined effect of the shielding effect of the hood and the seal effect of the bottom inlet flow.The suction effect at the flue outlet causes the gas to flow upward,and the sealing capacity decreases as the pressure difference between the inlet and outlet decreases.The extended hood enhances the shielding effect,and the enrichment of sulfur dioxide and sulfur trioxide is therefore enhanced.Specifically,the concentration of sulfur trioxide in the process flue increases from 1.1%to 1.4%,and the concentration of sulfur dioxide increases from 7.8%to 9.8%.In addition,the high-temperature area is mainly concentrated near the converter outlet,with a peak temperature of about 1473 K.It is necessary to strengthen the protection against high-temperature acid gas erosion.
sealed hood systemconverter blowingflue gas escape controlnumerical simulationcomponent distribution
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