空气分级旋流低氮燃烧器数值模拟研究

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中图分类号：TK16 文献标识码：A DOI： 10.7535/hbgykj.2025yx06009

Numerical simulation study on low-nitrogen combustion air staged swirl burner

TIAN Jingru，CUI Haiting，GAN Yong，WANG Yawei， YAO Ning， ZHANG Kai

School of Mechanical Engineering，Hebei Universityof Science and Technology，Shijiazhuang，Hebei O50ol8，China）

Abstract：To improve the furnace temperatureuniformity of heat treatment furnaces and reduce nitrogen oxide（ ΔNOx ） emissions，this study investigated the effects of different swirl angles on the temperature distribution and NOx emissions in a methanecombustion chamber.Numerical simulations were performedonaswirlburneranda traditionalfan-bladeburner using ANSYS Fluent software.The influence of the secondary air swirl angle oncombustion characteristicswas analyzed to determinetheoptimalswirlangle.Theresultsshow thatcomparedwith thetraditionalfan-blade burner，theswirl burner significantly enhances turbulent mixing intensitythroughair-staged mixing strategy.Specifically，thecombustion eficiencyis increased by 12.8% ，and the NOx emissions are reduced to 25.635mg/m3 （a reduction of 43.36% ）.Under specific operating parameters （excess air ratio of 1.1，swirl angle of 30∘ ），the fuel and air achieve an optimal mixing state： the NOx emission concentration is 18.7% lower than the limit specified in the national standard （GB 13271—2014），and the furnace temperature uniformity is improved by 2.82% . This research results are applicable to scenarios with high requirements for furnace temperatureuniformityandenvironmentalperformance，andcan provide theoretical basisand technicalreference forthelowcarbon and efficient operation of heat treatment furnaces.

Keywords ： science of combustion； low NOx combustion technology； flue gas recirculation； swirl combustion； numerical simulation

随着中国生态环境保护意识的日益增强，针对热处理炉等工业加热设备污染物排放的管控力度也在不断加大。（剩余11560字）