摘要
为了降低烧结工艺氮氧化物(NOX)排放量,作者通过卧式炉研究了烧结燃料种类和燃料结构对烧结工艺NOX排放的影响规律。研究结果表明:不同燃料烧结过程中排放的NOX的质量浓度差异较大,燃料在烧结过程中NOX的质量浓度由小到大的顺序为:低氮无烟煤<焦粉<高氮无烟煤.混合燃料烧结过程中NOX的实际平均质量浓度随着低氮无烟煤替代焦粉比例的升高而降低,随着高氮无烟煤替代焦粉比例的升高而升高,但均低于计算得出的NOX加和平均值,且随着替代比例的增加,NOX的实际排放质量浓度与加和平均值间的差值增大.烧结生产中应减少高氮无燃煤的使用比例,采用焦粉加低氮燃料相配合的燃料结构,充分利用燃料分段燃烧强化NOX同相和异相还原,降低烧结工艺中NOX的排放量.
In order to reduce the NO X emission of sintering process,effects of fuel on the NOx emission in sintering process were investigated using tube furnace.The results show that there exist great difference for the concentration of Nx emission of different kinds of fuel in sintering process.The increasing order of the NOx emission concentration in sintering process for the sintering fuel are low-nitrogen anthracite,coke powder and high-nitrogen anthracite.The actual average NOx concentration of mixed fuel decrease with the proportion of low-nitrogen anthracite replacing coke powder,but increase with the proportion of high-nitrogen anthracite replacing coke powder.The actual average NOx concentration are lower than that of the calculated average value of NOx.As the substitution ratio increase,the difference between the actual NOx concentration and the calculated average value of NOx increase.In sintering production,the proportion of high-nitrogen anthracite should be reduced,the fuel structure of coke powder and low-nitrogen anthracite should be adopted,and the characteristics of staged combustion of fuel should be fully utilized to strengthen the reduction of NOx ,finally reducing the NOx emission in sintering process.
作者
刘东辉
李俊华
彭悦
李兵
王广伟
Liu Donghui;Li Junhua;Peng Yue;Li Bing;Wang Guangwei(School of Environment,Tsinghua University,Beijing 100084,China;School of Metallurgy and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《材料与冶金学报》
CAS
北大核心
2020年第1期1-5,共5页
Journal of Materials and Metallurgy
基金
国家自然科学基金资助项目(21876093).
