新型内置式烟气热风炉贫氧亚高速燃烧器的结构优化研究

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中图分类号： TF061 文献标志码：A doi： 10.12415/j.issn.1671-7872.25030

Structure Optimization of a Novel Built-in Sub-high Velocity Oxygen-lean Burner for Flue Gas Hot Blast Stoves

YANG Ting1，CHEN Guang²，CHENBaoxin³

（1.School ofCivilEngineering andArchitecture，MaanshanUniversity，Maanshan2431oo，China; 2.Schoolof Energy and Environment， Anhui University of Technology，Maanshan 243032， China; 3. Thermal Technology Equipment Company， Hefei Cement Research & Design Institute Co.， Ltd， Hefei 240041， China）

Abstract：The combustion performance ofabuilt-in flue gas hot-blast stove sub-stoichiometric high-velocity burner with a load of 3822kW was investigated using the CFD （computational fluid dynamics） numerical simulation method. Based on the initial structure， a ceramic flame stabilizer rod with a diameter of 10mm wasadded to the combustion chamber to enhance combustion stability. The effects of the gas nozzle spacing （31-70mm） ）， the number of circumferential nozle groups （4-9 groups），and the combination methods of the flame stabilizer rodon the combustion performance were examined to optimize the structure.The results indicate that when the gas nozzle spacing is set at 62mm ，the number of circumferential nozzle groups is 5， and a cross-shaped flame stabilizer rod configuration isadopted，the mixing intensity between the fuel gas and combustion-supporting flue gas is significantly enhanced，leading to more complete combustion and improved flame stability.Compared with the initial structure，the optimized configuration increases the outlet temperature of sintered flue gas in the combustion chamberby 6.3% to 1140‰ ，raisestheflowvelocityby 4.5% to 93.18m/s ，andreducesthe CO mass fraction substantiallyby 70.8% to 0.003 8. The optimized approach achieves simultaneous improvements in combustion temperature，flow stability，and polutantcontrol efficiency through the synergistic effects offlame anchoring by the flame stabilizer rods，enhanced turbulent mixing via nozzle arrangement，and drag modulation by the swirl flow field.

Keywords：hot-blast stove; burner; numerical simulation; structural optimization; flame stabilizer rod; injection hole; pollutant control; combustion performance

烧结烟气是钢铁行业 NOx 的主要排放源，其排放量占比超过 50%[1-2] 。（剩余11971字）