Application Research Of Surface Burner In Aluminum Melting Insulation Furnace

With the continuous development of China’s industry,it is accompanied by environmental pollution and ecological destruction.Among them,nitrogen oxides produced by fuel combustion are one of the main sources of air pollution.In this regard,the state has imposed restrictions on the concentration of nitrogen oxides emitted by industrial furnaces.In recent years,the natural gas-fueled aluminum melting insulation furnace is developing towards various combustion methods,good thermal insulation and less oxidation and burning loss of aluminum,but ignores the impact of environmental pollution.In order to further reduce the impact of nitrogen oxides on the environment,provinces and cities have issued more stringent local standards,and Shanghai has taken the lead in formulating the Industrial Furnace Air Pollutant Emission Standard(DB31/860-2014),requirements:from February 1,2015 New industrial furnace NO_x emission limit of 200 mg/m~3,Higher NO_x emissions standards mean that more and more low-nitrogen combustion technologies will be applied to industrial furnaces.Surface combustion technology is a common low nitrogen combustion technology,in this paper,the surface burner is applied in the aluminum melting holding furnace to achieve ultra-low emission of nitrogen oxides,and different numbers of surface burners and porous media of different materials are selected for comparative simulation.3D modeling of surface burners and aluminum melting holding furnaces via Solidworks software and using Fluent software.The distribution of temperature field and pollutant emission in the holding furnace are simulated,and then the combustion characteristics of the surface burner in the aluminum melting holding furnace are analyzed.The simulation results show that the surface burner using silicon carbide porous dielectric material can meet the process temperature of molten aluminum and achieve ultra-low NO_x emissions.Reasonable addition of burners can improve the temperature uniformity in the holding furnace.This study provides a reference for improving the combustion efficiency of aluminum melting and holding furnaces,reducing the oxidation and burning loss of aluminum and reducing nitrogen oxide emissions,and provides theoretical and technical support for the application of low NO_x emissions in aluminum industrial furnaces.